ci

* add templates for `planarize_quad_mesh`

* templates in subroutine

* xcode version in ci

---------

Co-authored-by: xTree <xliotx@gmail.com>

.gitattributes

@@ -0,0 +1,20 @@
+# Set the default behavior, in case people don't have core.autocrlf set.
+* text=auto
+
+# Explicitly declare text files you want to always be normalized and converted
+# to native line endings on checkout.
+*.tex text
+*.bib text
+*.svg text
+*.py text
+*.vbs text
+*.cpp text
+*.hpp text
+Makefile text
+
+# Declare files that will always have CRLF line endings on checkout.
+*.sln text eol=crlf
+
+# Denote all files that are truly binary and should not be modified.
+*.png binary
+*.jpg binary

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,6 +1,6 @@
 ---
-name: Bug report
-about: Create a report to help us improve
+name: 🐛 Bug Report
+about: If something isn't working as expected
 title: ''
 labels: bug, pending verification
 assignees: ''
@@ -8,10 +8,11 @@ assignees: ''
 ---
 
 #### Describe the bug
+<!-- A clear and concise description of what the bug is. -->
 
-A clear and concise description of what the bug is.
+#### Platform
+<!-- Check all that apply (change to `[x]`) -->
 
-#### Check all that apply (change to `[x]`)
 - [ ] Windows
 - [ ] macOS
 - [ ] Linux

.github/ISSUE_TEMPLATE/compilation.md

@@ -1,5 +1,5 @@
 ---
-name: Compilation issue
+name: 😱 Compilation issue
 about: Report a problem when compiling the code
 title: ''
 labels: 'compilation'
@@ -7,11 +7,20 @@ assignees: ''
 
 ---
 
-#### Describe your question
+#### Describe your issue
+<!-- Be sure to include any log file that may help use diagnose the issue -->
 
-...
 
-#### Check all that apply (change to `[x]`)
+#### Checklist
+<!-- Check all that apply (change to `[x]`) -->
+
+- [ ] I have read the [bug report](https://libigl.github.io/bug-report/) page
+- [ ] CMake issue: I have tried with a fresh clone/empty build directory
+
+#### Platform
+<!-- Check all that apply (change to `[x]`) -->
+
 - [ ] Windows
-- [ ] macOS
+- [ ] macOS Intel
+- [ ] macOS Arm (e.g., M1, M2)
 - [ ] Linux

.github/ISSUE_TEMPLATE/config.yml

@@ -1 +1,8 @@
 blank_issues_enabled: false
+contact_links:
+  - name: 🚀 Feature Request
+    url: https://github.com/libigl/libigl/discussions/new?category_id=32617689
+    about: Share ideas for new features
+  - name: ❓ Ask a Question
+    url: https://github.com/libigl/libigl/discussions/new?category_id=32617688
+    about: Ask the community for help

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,17 +0,0 @@
----
-name: Feature request
-about: Suggest an idea for this project
-title: ''
-labels: 'enhancement'
-assignees: ''
-
----
-
-#### Describe your feature request
-
-...
-
-#### Check all that apply (change to `[x]`)
-- [ ] Windows
-- [ ] macOS
-- [ ] Linux

.github/ISSUE_TEMPLATE/question.md

@@ -1,17 +0,0 @@
----
-name: Question
-about: Ask question about the tutorial or documentation
-title: ''
-labels: 'question'
-assignees: ''
-
----
-
-#### Describe your question
-
-...
-
-#### Check all that apply (change to `[x]`)
-- [ ] Windows
-- [ ] macOS
-- [ ] Linux

.github/pull_request_template.md

@@ -1,9 +1,11 @@
 Fixes # .
 
-[Describe your changes and what you've already done to test it.]
+<!-- Describe your changes and what you've already done to test it. -->
 
 
-#### Check all that apply (change to `[x]`)
+#### Checklist
+<!-- Check all that apply (change to `[x]`) -->
+
 - [ ] All changes meet [libigl style-guidelines](https://libigl.github.io/style-guidelines/).
 - [ ] Adds new .cpp file.
 - [ ] Adds corresponding unit test.

.github/workflows/continuous.yml

@@ -3,11 +3,11 @@ name: Build
 on:
   push:
     branches:
-      - master
+      - main
       - stable
   pull_request:
     branches:
-      - master
+      - main
       - stable
 
 env:
@@ -20,21 +20,16 @@ jobs:
   ####################
 
   Unix:
-    name: ${{ matrix.name }} (${{ matrix.config }}, ${{ matrix.static }})
+    name: ${{ matrix.os }} ${{ fromJSON('["Header-Only", "Static"]')[matrix.build-params.static == 'ON'] }} ${{ matrix.build-params.tutorials == 'ON' && 'tutorial' || ''}} ${{ matrix.build-params.tests == 'ON' && 'tests' || ''}} ${{ matrix.config }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-18.04, macos-latest]
+        os: [ubuntu-24.04, macos-latest]
         config: [Release]
-        static: [ON, OFF]
-        include:
-          - os: macos-latest
-            name: macOS
-          - os: ubuntu-18.04
-            name: Linux
+        build-params: [ {static:  ON, tutorials:  ON, tests:  ON }, {static: OFF, tutorials: OFF, tests:  ON }, {static: OFF, tutorials:  ON, tests: OFF }]
     env:
-      LIBIGL_NUM_THREADS: 1  # See https://github.com/libigl/libigl/pull/996
+      IGL_NUM_THREADS: 4  # don't go wild, but let the parallel_for tests do something
     steps:
       - name: Checkout repository
         uses: actions/checkout@v1
@@ -44,27 +39,31 @@ jobs:
       - name: Dependencies (Linux)
         if: runner.os == 'Linux'
         run: |
+            sudo apt-get update
             sudo apt-get install \
-            libblas-dev \
-            libboost-filesystem-dev \
-            libboost-system-dev \
-            libboost-thread-dev \
-            libglu1-mesa-dev \
-            liblapack-dev \
-            libmpfr-dev \
-            xorg-dev \
-            ccache
+              libblas-dev \
+              libglu1-mesa-dev \
+              liblapack-dev \
+              xorg-dev \
+              ccache
 
       - name: Dependencies (macOS)
         if: runner.os == 'macOS'
-        run: brew install boost gmp mpfr ccache
+        run: |
+          HOMEBREW_NO_AUTO_UPDATE=1 brew install ccache
+
+      - name: Setup Xcode version
+        if: runner.os == 'macOS'
+        uses: maxim-lobanov/setup-xcode@v1
+        with:
+          xcode-version: '16.3.0'
 
       - name: Cache Build
         id: cache-build
-        uses: actions/cache@v1
+        uses: actions/cache@v4
         with:
           path: ~/.ccache
-          key: ${{ runner.os }}-${{ matrix.config }}-${{ matrix.static }}-cache
+          key: ${{ runner.os }}-${{ matrix.config }}-${{ matrix.build-params.static }}-cache
 
       - name: Prepare ccache
         run: |
@@ -75,75 +74,104 @@ jobs:
         run: |
           mkdir -p build
           cd build
+          # https://github.com/eclipse-ecal/ecal/issues/2041
           cmake .. \
+            -DCMAKE_POLICY_VERSION_MINIMUM=3.5 \
             -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
             -DCMAKE_BUILD_TYPE=${{ matrix.config }} \
-            -DLIBIGL_USE_STATIC_LIBRARY=${{ matrix.static }} \
-            -DLIBIGL_WITH_CGAL=ON \
-            -DLIBIGL_WITH_COMISO=ON
+            -DLIBIGL_USE_STATIC_LIBRARY=${{ matrix.build-params.static }} \
+            -DLIBIGL_BUILD_TUTORIALS=${{ matrix.build-params.tutorials }} \
+            -DLIBIGL_GLFW_TESTS=OFF \
+            -DLIBIGL_BUILD_TESTS=${{ matrix.build-params.tests }} \
+            -DLIBIGL_COPYLEFT_CGAL=ON
 
       - name: Build
         run: cd build; make -j2; ccache --show-stats
 
       - name: Tests
-        run: cd build; ctest --verbose
+        run: cd build; ctest --show-only; ctest --verbose
 
   ####################
   # Windows
   ####################
 
   Windows:
-    runs-on: windows-2019
-    env:
-      CC: cl.exe
-      CXX: cl.exe
+    name: Windows ${{ fromJSON('["Header-Only", "Static"]')[matrix.build-params.static == 'ON'] }} ${{ matrix.build-params.tutorials == 'ON' && 'tutorial' || ''}} ${{ matrix.build-params.selected_tutorial != 'NONE' && matrix.build-params.selected_tutorial || '' }} ${{ matrix.build-params.tests == 'ON' && 'tests' || ''}} ${{ matrix.config }}
+    runs-on: windows-2022
     strategy:
       fail-fast: false
       matrix:
         config: [Release]
-        static: [ON, OFF]
+        build-params: [ 
+        {static:  ON, tutorials:  ON, tests:  ON, selected_tutorial: NONE}, 
+        {static: OFF, tutorials: OFF, tests:  ON, selected_tutorial: NONE}, 
+        {static: OFF, tutorials:  ON, tests: OFF, selected_tutorial: 1},
+        {static: OFF, tutorials:  ON, tests: OFF, selected_tutorial: 2},
+        {static: OFF, tutorials:  ON, tests: OFF, selected_tutorial: 3},
+        {static: OFF, tutorials:  ON, tests: OFF, selected_tutorial: 4},
+        {static: OFF, tutorials:  ON, tests: OFF, selected_tutorial: 5},
+        {static: OFF, tutorials:  ON, tests: OFF, selected_tutorial: 6},
+        {static: OFF, tutorials:  ON, tests: OFF, selected_tutorial: 7},
+        {static: OFF, tutorials:  ON, tests: OFF, selected_tutorial: 8},
+        {static: OFF, tutorials:  ON, tests: OFF, selected_tutorial: 9},
+        {static: OFF, tutorials:  ON, tests: OFF, selected_tutorial: 10},
+      ]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v1
         with:
           fetch-depth: 10
-      - uses: seanmiddleditch/gha-setup-ninja@master
 
-        # https://github.com/actions/cache/issues/101
-      - name: Set env
+      - name: Install Ninja
+        uses: seanmiddleditch/gha-setup-ninja@master
+
+      - name: Set env variable for sccache
         run: |
-          echo "::set-env name=appdata::$($env:LOCALAPPDATA)"
-          echo "::set-env name=BOOST_ROOT::$env:BOOST_ROOT_1_69_0"
+          echo "appdata=$env:LOCALAPPDATA" >> ${env:GITHUB_ENV}
 
       - name: Cache build
         id: cache-build
-        uses: actions/cache@v1
+        uses: actions/cache@v4
         with:
           path: ${{ env.appdata }}\Mozilla\sccache
-          key: ${{ runner.os }}-${{ matrix.config }}-${{ matrix.static }}-cache
+          key: ${{ runner.os }}-${{ matrix.config }}-${{ matrix.build-params.static }}-cache
 
       - name: Prepare sccache
         run: |
-          Invoke-Expression (New-Object System.Net.WebClient).DownloadString('https://get.scoop.sh')
+          iwr -useb 'https://raw.githubusercontent.com/scoopinstaller/install/master/install.ps1' -outfile 'install.ps1'
+          .\install.ps1 -RunAsAdmin
           scoop install sccache --global
-          # Scoop modifies the PATH so we make the modified PATH global.
-          echo "::set-env name=PATH::$env:PATH"
+          # Scoop modifies the PATH so we make it available for the next steps of the job
+          echo "${env:PATH}" >> ${env:GITHUB_PATH}
 
-        # We run configure + build in the same step, since they both need to call VsDevCmd
-        # Also, cmd uses ^ to break commands into multiple lines (in powershell this is `)
       - name: Configure and build
         shell: cmd
         run: |
-          call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\Tools\VsDevCmd.bat" -arch=x64
+          call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\Common7\Tools\VsDevCmd.bat" -arch=x64
+          # https://github.com/eclipse-ecal/ecal/issues/2041
           cmake -G Ninja ^
+            -DCMAKE_POLICY_VERSION_MINIMUM=3.5 ^
             -DCMAKE_CXX_COMPILER_LAUNCHER=sccache ^
             -DCMAKE_BUILD_TYPE=${{ matrix.config }} ^
-            -DLIBIGL_USE_STATIC_LIBRARY=${{ matrix.static }} ^
-            -DLIBIGL_WITH_CGAL=ON ^
-            -DLIBIGL_WITH_COMISO=OFF ^
+            -DLIBIGL_USE_STATIC_LIBRARY=${{ matrix.build-params.static }} ^
+            -DLIBIGL_COPYLEFT_CGAL=ON ^
+            -DLIBIGL_BUILD_TUTORIALS=${{ matrix.build-params.tutorials }} ^
+            -DLIBIGL_BUILD_TESTS=${{ matrix.build-params.tests }} ^
+            -DLIBIGL_GLFW_TESTS=OFF ^
+            -DLIBIGL_TUTORIALS_CHAPTER1=${{ (matrix.build-params.selected_tutorial == 'NONE' || matrix.build-params.selected_tutorial == '1') && 'ON' || 'OFF' }} ^
+            -DLIBIGL_TUTORIALS_CHAPTER2=${{ (matrix.build-params.selected_tutorial == 'NONE' || matrix.build-params.selected_tutorial == '2') && 'ON' || 'OFF' }} ^
+            -DLIBIGL_TUTORIALS_CHAPTER3=${{ (matrix.build-params.selected_tutorial == 'NONE' || matrix.build-params.selected_tutorial == '3') && 'ON' || 'OFF' }} ^
+            -DLIBIGL_TUTORIALS_CHAPTER4=${{ (matrix.build-params.selected_tutorial == 'NONE' || matrix.build-params.selected_tutorial == '4') && 'ON' || 'OFF' }} ^
+            -DLIBIGL_TUTORIALS_CHAPTER5=${{ (matrix.build-params.selected_tutorial == 'NONE' || matrix.build-params.selected_tutorial == '5') && 'ON' || 'OFF' }} ^
+            -DLIBIGL_TUTORIALS_CHAPTER6=${{ (matrix.build-params.selected_tutorial == 'NONE' || matrix.build-params.selected_tutorial == '6') && 'ON' || 'OFF' }} ^
+            -DLIBIGL_TUTORIALS_CHAPTER7=${{ (matrix.build-params.selected_tutorial == 'NONE' || matrix.build-params.selected_tutorial == '7') && 'ON' || 'OFF' }} ^
+            -DLIBIGL_TUTORIALS_CHAPTER8=${{ (matrix.build-params.selected_tutorial == 'NONE' || matrix.build-params.selected_tutorial == '8') && 'ON' || 'OFF' }} ^
+            -DLIBIGL_TUTORIALS_CHAPTER9=${{ (matrix.build-params.selected_tutorial == 'NONE' || matrix.build-params.selected_tutorial == '9') && 'ON' || 'OFF' }} ^
+            -DLIBIGL_TUTORIALS_CHAPTER10=${{ (matrix.build-params.selected_tutorial == 'NONE' || matrix.build-params.selected_tutorial == '10') && 'ON' || 'OFF' }} ^
             -B build ^
             -S .
-          cmake --build build
+          cmake --build build -j2
 
       - name: Tests
-        run: cd build; ctest --verbose
+        run: cd build; ctest --show-only; ctest --verbose -j2
+

.github/workflows/nightly.yml

@@ -1,190 +0,0 @@
-name: Nightly
-
-on:
-  schedule:
-    - cron:  '0 4 * * *'
-
-env:
-  CTEST_OUTPUT_ON_FAILURE: ON
-  CTEST_PARALLEL_LEVEL: 2
-
-jobs:
-  ####################
-  # Linux / macOS
-  ####################
-
-  # Part of this file is inspired from
-  # https://github.com/onqtam/doctest/blob/dev/.github/workflows/main.yml
-
-  Unix:
-    name: ${{ matrix.name }} (${{ matrix.config }}, Static=${{ matrix.static }})
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        name: [
-          ubuntu-18.04-gcc-7,
-          ubuntu-18.04-gcc-8,
-          ubuntu-18.04-gcc-9,
-          ubuntu-18.04-clang-7,
-          ubuntu-18.04-clang-8,
-          ubuntu-18.04-clang-9,
-          macOS-latest,
-        ]
-        config: [Debug, Release]
-        static: [ON, OFF]
-        include:
-          - name: ubuntu-18.04-gcc-7
-            os: ubuntu-18.04
-            compiler: gcc
-            version: "7"
-
-          - name: ubuntu-18.04-gcc-8
-            os: ubuntu-18.04
-            compiler: gcc
-            version: "8"
-
-          - name: ubuntu-18.04-gcc-9
-            os: ubuntu-18.04
-            compiler: gcc
-            version: "9"
-
-          - name: ubuntu-18.04-clang-7
-            os: ubuntu-18.04
-            compiler: clang
-            version: "7"
-
-          - name: ubuntu-18.04-clang-8
-            os: ubuntu-18.04
-            compiler: clang
-            version: "8"
-
-          - name: ubuntu-18.04-clang-9
-            os: ubuntu-18.04
-            compiler: clang
-            version: "9"
-
-          - name: macOS-latest
-            os: macOS-latest
-
-            # Build tutorials for most configurations
-          - tutorials: ON
-
-            # Except with Debug mode
-          - config: Debug
-            tutorials: OFF
-    env:
-      LIBIGL_NUM_THREADS: 1  # See https://github.com/libigl/libigl/pull/996
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v1
-        with:
-          fetch-depth: 10
-
-      - name: Dependencies (Linux)
-        if: runner.os == 'Linux'
-        run: |
-            # LLVM 9 is not in Bionic's repositories so we add the official LLVM repository.
-            if [ "${{ matrix.compiler }}" = "clang" ] && [ "${{ matrix.version }}" = "9" ]; then
-              sudo add-apt-repository "deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-9 main"
-            fi
-            sudo apt-get update
-
-            if [ "${{ matrix.compiler }}" = "gcc" ]; then
-              sudo apt-get install -y g++-${{ matrix.version }}
-              echo "::set-env name=CC::gcc-${{ matrix.version }}"
-              echo "::set-env name=CXX::g++-${{ matrix.version }}"
-            else
-              sudo apt-get install -y clang-${{ matrix.version }}
-              echo "::set-env name=CC::clang-${{ matrix.version }}"
-              echo "::set-env name=CXX::clang++-${{ matrix.version }}"
-            fi
-
-            sudo apt-get install \
-              libblas-dev \
-              libboost-filesystem-dev \
-              libboost-system-dev \
-              libboost-thread-dev \
-              libglu1-mesa-dev \
-              liblapack-dev \
-              libmpfr-dev \
-              xorg-dev
-
-      - name: Dependencies (macOS)
-        if: runner.os == 'macOS'
-        run: brew install boost gmp mpfr
-
-      - name: Configure
-        run: |
-          mkdir -p build
-          cd build
-          cmake .. \
-            -DCMAKE_BUILD_TYPE=${{ matrix.config }} \
-            -DLIBIGL_USE_STATIC_LIBRARY=${{ matrix.static }} \
-            -DLIBIGL_BUILD_TUTORIALS=${{ matrix.tutorials }} \
-            -DLIBIGL_WITH_CGAL=ON \
-            -DLIBIGL_WITH_COMISO=ON
-
-      - name: Free Disk Space
-        if: runner.os == 'Linux'
-        run: |
-            sudo swapoff -a
-            sudo apt clean
-            sudo rm -rf /swapfile /usr/share/dotnet /usr/local/lib/android /opt/ghc
-            df -h
-
-      - name: Build
-        run: cd build; make -j2
-
-      - name: Tests
-        run: cd build; ctest --verbose
-
-  ####################
-  # Windows
-  ####################
-
-  Windows:
-    name: Windows (${{ matrix.config }}, Static=${{ matrix.static }})
-    runs-on: windows-2019
-    env:
-      CC: cl.exe
-      CXX: cl.exe
-    strategy:
-      fail-fast: false
-      matrix:
-        config: [Debug, Release]
-        static: [ON, OFF]
-        include:
-          - config: Debug
-            tutorials: OFF
-          - config: Release
-            tutorials: ON
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v1
-        with:
-          fetch-depth: 10
-      - uses: seanmiddleditch/gha-setup-ninja@master
-
-      - name: Set env
-        run: |
-          echo "::set-env name=BOOST_ROOT::$env:BOOST_ROOT_1_69_0"
-
-        # We run configure + build in the same step, since they both need to call VsDevCmd
-        # Also, cmd uses ^ to break commands into multiple lines (in powershell this is `)
-      - name: Configure and build
-        shell: cmd
-        run: |
-          call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\Tools\VsDevCmd.bat" -arch=x64
-          cmake -G Ninja ^
-            -DCMAKE_BUILD_TYPE=${{ matrix.config }} ^
-            -DLIBIGL_USE_STATIC_LIBRARY=${{ matrix.static }} ^
-            -DLIBIGL_BUILD_TUTORIALS=${{ matrix.tutorials }} ^
-            -DLIBIGL_WITH_CGAL=ON ^
-            -DLIBIGL_WITH_COMISO=OFF ^
-            -B build ^
-            -S .
-          cmake --build build -j 2
-
-      - name: Tests
-        run: cd build; ctest --verbose

.gitignore

@@ -1,99 +1,53 @@
-# use glob syntax.
-*.a
-*.dylib
-*.egg-info/
-*.exe
-*.ilk
-*.log
+# Prerequisites
+*.d
+
+# Compiled Object files
+*.slo
+*.lo
 *.o
-*.opensdf
-*.orig
-*.pdb
-*.psess
-*.pyc
-*.sdf
+*.obj
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Compiled Dynamic libraries
 *.so
-*.so.[0123456789]
-*.so.[0123456789].[0123456789]
-*.suo
-*.swo
-*.swp
-*.tlog
-*.user
-*.vsp
-*CMakeFiles*
-*buildXcode*
-*tags
-*~
+*.dylib
+*.dll
+
+# Fortran module files
+*.mod
+*.smod
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app
+
+# Build folders
+/build*
+/tests/data
+/tutorial/data
+/install
+
+# Libigl specific
+LibiglOptions.cmake
+
+# vim debris
+.*.un~
+.*.swo
+.*.swp
+
+# macos debris
 .DS_Store
-.idea/
-.vs/
-.vscode/
-/external
-Debug/
-README.html
-Release/
-Untitled.ipynb
-build
-doc.html
-documentation/*.aux
-documentation/*.log
-documentation/*.out
-example
-example1
-example_header_only
-example_static
-examples/*/*.mexmaci64
-examples/*/*.rbr
-examples/bbw/bbw_demo
-examples/bbw/bbw_demo_selfcontained.zip
-examples/bbw/bbw_demo_selfcontained/*
-examples/bbw/examples/*-volume.dmat
-examples/bbw/examples/*-volume.mesh
-examples/principal_curvature/curvature
-examples/quicklook-mesh/Mesh.qlgenerator/*
-examples/upright/upright
-external/MeshFix/meshfix
-external/embree/build/*
-external/glew/build
-external/glfw/build
-external/libpng/build
-external/medit/rebar.rbr
-external/tetgen/tetgen
-external/tinyxml2/build
-external/tinyxml2/test
-external/tinyxml2/tinyxml2.pc
-external/yimg/showpng
-iglhelpers.pyc
-lib
-libigl.zip
-optional/build
-python/.idea
-python/.ipynb_checkpoints
-python/__pycache__
-python/build
-python/build2
-python/build3
-python/build4
-python/builddebug
-python/buildstatic
-python/py_igl/todo
-python/py_igl/todo
-python/scripts/generated
-scripts/change_name.sh
-site/
-syntax: glob
-tests/bin
-tests/build
-tests/data
-tutorial/*/*.mexmaci64
-tutorial/*/Makefile
-tutorial/*/build/*
-tutorial/.idea
-tutorial/XXX_test/CMakeLists.txt
-tutorial/XXX_test/main.cpp
-tutorial/build
-tutorial/cmake-build-debug
-tutorial/data
-tutorial/readme.html
-untitled
+*~
+dox/
+latex/
+scripts/

CMakeLists.txt

@@ -1,74 +1,189 @@
-cmake_minimum_required(VERSION 3.1)
-
-# Toggles the use of the hunter package manager
-option(HUNTER_ENABLED "Enable Hunter package manager support" OFF)
-
-include("cmake/HunterGate.cmake")
-HunterGate(
-	URL "https://github.com/ruslo/hunter/archive/v0.23.171.tar.gz"
-	SHA1 "5d68bcca78eee347239ca5f4d34f4b6c12683154"
-)
-
-project(libigl)
-
 # Detects whether this is a top-level project
 get_directory_property(LIBIGL_PARENT_DIR PARENT_DIRECTORY)
 if(NOT LIBIGL_PARENT_DIR)
-	set(LIBIGL_TOPLEVEL_PROJECT ON)
+    set(LIBIGL_TOPLEVEL_PROJECT ON)
 else()
-	set(LIBIGL_TOPLEVEL_PROJECT OFF)
+    set(LIBIGL_TOPLEVEL_PROJECT OFF)
+endif()
+
+
+
+# Check required CMake version
+set(REQUIRED_CMAKE_VERSION "3.16.0")
+if(LIBIGL_TOPLEVEL_PROJECT)
+    cmake_minimum_required(VERSION ${REQUIRED_CMAKE_VERSION})
+else()
+    # Don't use cmake_minimum_required here to avoid implicitly overriding parent policies
+    if(${CMAKE_VERSION} VERSION_LESS ${REQUIRED_CMAKE_VERSION})
+        message(FATAL_ERROR "CMake required version to build Libigl is ${REQUIRED_CMAKE_VERSION}")
+    endif()
+endif()
+
+# Include user-provided default options if available. We do that before the main
+# `project()` so that we can define the C/C++ compilers from the option file.
+if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/LibiglOptions.cmake)
+    message(STATUS "Using local options file: ${CMAKE_CURRENT_SOURCE_DIR}/LibiglOptions.cmake")
+    include(${CMAKE_CURRENT_SOURCE_DIR}/LibiglOptions.cmake)
+endif()
+
+# If this option is enabled, this will setup the Hunter package manager.
+option(HUNTER_ENABLED "Enable Hunter package manager support" OFF)
+if(HUNTER_ENABLED)
+    include("cmake/misc/HunterGate.cmake")
+    HunterGate(
+        URL "https://github.com/cpp-pm/hunter/archive/v0.24.8.tar.gz"
+        SHA1 "ca7838dded9a1811b04ffd56175f629e0af82d3d"
+    )
+endif()
+
+################################################################################
+project(libigl VERSION 2.5.0)
+
+# CMake module path
+list(PREPEND CMAKE_MODULE_PATH
+    ${CMAKE_CURRENT_LIST_DIR}/cmake/
+    ${CMAKE_CURRENT_LIST_DIR}/cmake/igl
+    ${CMAKE_CURRENT_LIST_DIR}/cmake/find
+    ${CMAKE_CURRENT_LIST_DIR}/cmake/recipes/external
+)
+
+if(HUNTER_ENABLED)
+    list(PREPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_LIST_DIR}/cmake/recipes/hunter)
+else()
+    list(PREPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_LIST_DIR}/cmake/recipes/external)
+endif()
+
+set_property(GLOBAL PROPERTY __igl_module_path ${CMAKE_MODULE_PATH})
+
+set(LIBIGL_DEFAULT_CGAL ${LIBIGL_TOPLEVEL_PROJECT})
+set(MATLAB_ADDITIONAL_VERSIONS
+    "R2023b=10.4"
+    "R2023a=10.4"
+    "R2022b=10.3"
+    "R2022a=10.2"
+    "R2021b=10.1"
+    "R2021a=10.0"
+)
+set(LIBIGL_DEFAULT_MATLAB ${LIBIGL_TOPLEVEL_PROJECT})
+set(LIBIGL_DEFAULT_MOSEK ${LIBIGL_TOPLEVEL_PROJECT})
+if(LIBIGL_TOPLEVEL_PROJECT)
+    find_package(Matlab QUIET)
+    if(NOT Matlab_FOUND)
+        set(LIBIGL_DEFAULT_MATLAB OFF)
+        message(WARNING "Matlab not found, disabling igl_restricted::matlab module.")
+    endif()
+    find_package(MOSEK QUIET)
+    if(NOT MOSEK_FOUND)
+        set(LIBIGL_DEFAULT_MOSEK OFF)
+        message(WARNING "Mosek not found, disabling igl_restricted::mosek module.")
+    endif()
+endif()
+set(LIBIGL_DEFAULT_COMISO ${LIBIGL_TOPLEVEL_PROJECT})
+if(LIBIGL_TOPLEVEL_PROJECT AND (NOT APPLE) AND UNIX)
+  find_package(BLAS QUIET)
+    if(NOT BLAS_FOUND)
+        set(LIBIGL_DEFAULT_COMISO OFF)
+        message(WARNING "BLAS not found, disabling igl_copyleft::comiso module.")
+    endif()
 endif()
 
 # Build tests and tutorials
-option(LIBIGL_BUILD_TESTS      "Build libigl unit test"        ${LIBIGL_TOPLEVEL_PROJECT})
-option(LIBIGL_BUILD_TUTORIALS  "Build libigl tutorial"         ${LIBIGL_TOPLEVEL_PROJECT})
-option(LIBIGL_EXPORT_TARGETS   "Export libigl CMake targets"   ${LIBIGL_TOPLEVEL_PROJECT})
+option(LIBIGL_BUILD_TESTS      "Build libigl unit test"                ${LIBIGL_TOPLEVEL_PROJECT})
+option(LIBIGL_BUILD_TUTORIALS  "Build libigl tutorial"                 ${LIBIGL_TOPLEVEL_PROJECT})
+option(LIBIGL_INSTALL          "Enable installation of libigl targets" ${LIBIGL_TOPLEVEL_PROJECT})
 
 # USE_STATIC_LIBRARY speeds up the generation of multiple binaries,
 # at the cost of a longer initial compilation time
 # (by default, static build is off since libigl is a header-only library)
-option(LIBIGL_USE_STATIC_LIBRARY "Use libigl as static library" ON)
+option(LIBIGL_USE_STATIC_LIBRARY "Use libigl as static library" ${LIBIGL_TOPLEVEL_PROJECT})
 
-# All dependencies that are downloaded as cmake projects and tested on the auto-builds are ON
-# (by default, all build options are off)
-option(LIBIGL_WITH_COMISO            "Use CoMiso"                   ON)
-option(LIBIGL_WITH_EMBREE            "Use Embree"                   ON)
-option(LIBIGL_WITH_OPENGL            "Use OpenGL"                   ON)
-option(LIBIGL_WITH_OPENGL_GLFW       "Use GLFW"                     ON)
-option(LIBIGL_WITH_OPENGL_GLFW_IMGUI "Use ImGui"                    ON)
-option(LIBIGL_WITH_PNG               "Use PNG"                      ON)
-option(LIBIGL_WITH_TETGEN            "Use Tetgen"                   ON)
-option(LIBIGL_WITH_TRIANGLE          "Use Triangle"                 ON)
-option(LIBIGL_WITH_PREDICATES        "Use exact predicates"         ON)
-option(LIBIGL_WITH_XML               "Use XML"                      ON)
-option(LIBIGL_WITH_PYTHON            "Use Python"                   OFF)
-### End
+# Permissive modules. These modules are available under MPL2 license, and their dependencies are available
+# under a permissive or public domain license.
+option(LIBIGL_EMBREE           "Build target igl::embree"           ${LIBIGL_TOPLEVEL_PROJECT})
+option(LIBIGL_GLFW             "Build target igl::glfw"             ${LIBIGL_TOPLEVEL_PROJECT})
+option(LIBIGL_IMGUI            "Build target igl::imgui"            ${LIBIGL_TOPLEVEL_PROJECT})
+option(LIBIGL_OPENGL           "Build target igl::opengl"           ${LIBIGL_TOPLEVEL_PROJECT})
+option(LIBIGL_STB              "Build target igl::stb"              ${LIBIGL_TOPLEVEL_PROJECT})
+option(LIBIGL_PREDICATES       "Build target igl::predicates"       ${LIBIGL_TOPLEVEL_PROJECT})
+option(LIBIGL_SPECTRA          "Build target igl::spectra"          ${LIBIGL_TOPLEVEL_PROJECT})
+option(LIBIGL_XML              "Build target igl::xml"              ${LIBIGL_TOPLEVEL_PROJECT})
 
-if(${LIBIGL_WITH_PYTHON})
-	message(FATAL_ERROR "Python binding are in the process of being redone. Please use the master branch or refer to https://github.com/geometryprocessing/libigl-python-bindings for the developement version or https://anaconda.org/conda-forge/igl for the stable version.")
+# Copyleft modules. These modules are available under GPL license, and their dependencies are
+# available under a copyleft license.
+option(LIBIGL_COPYLEFT_CORE    "Build target igl_copyleft::core"    ${LIBIGL_TOPLEVEL_PROJECT})
+option(LIBIGL_COPYLEFT_CGAL    "Build target igl_copyleft::cgal"    ${LIBIGL_DEFAULT_CGAL})
+option(LIBIGL_COPYLEFT_COMISO  "Build target igl_copyleft::comiso"  ${LIBIGL_TOPLEVEL_PROJECT})
+option(LIBIGL_COPYLEFT_TETGEN  "Build target igl_copyleft::tetgen"  ${LIBIGL_TOPLEVEL_PROJECT})
+
+# Restricted modules. These modules are available under MPL2 license, but their dependencies are
+# only available under a non-commercial or proprietary license.
+option(LIBIGL_RESTRICTED_MATLAB   "Build target igl_restricted::matlab"   ${LIBIGL_DEFAULT_MATLAB})
+option(LIBIGL_RESTRICTED_MOSEK    "Build target igl_restricted::mosek"    ${LIBIGL_DEFAULT_MOSEK})
+option(LIBIGL_RESTRICTED_TRIANGLE "Build target igl_restricted::triangle" ${LIBIGL_TOPLEVEL_PROJECT})
+
+# GLFW doesn't run on headless CI machines so don't run (or build them).
+# Unfortunately on headless mac machines glfw seems to hang rather than crash
+# making it hard to catch at runtime.
+option(LIBIGL_GLFW_TESTS       "Build igl::glfw tests"             ${LIBIGL_TOPLEVEL_PROJECT})
+
+option(LIBIGL_WARNINGS_AS_ERRORS "Turn on many warnings and treat as errors" OFF)
+
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
+set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
+set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
+
+
+# Include CMake helper functions
+include(igl_add_library)
+include(igl_add_test)
+include(igl_add_tutorial)
+include(igl_copy_dll)
+include(igl_include)
+include(igl_install)
+include(igl_target_sources)
+
+# Enable unit testing at the root level
+if(LIBIGL_BUILD_TESTS)
+    include(CTest)
 endif()
 
-set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
-set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
-set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
-
-### conditionally compile certain modules depending on libraries found on the system
-list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_LIST_DIR}/cmake)
-
-### Adding libIGL: choose the path to your local copy libIGL
+# Defines CMake targets for selected libigl modules
 include(libigl)
 
 if(LIBIGL_BUILD_TUTORIALS)
-	add_subdirectory(tutorial)
+    add_subdirectory(tutorial)
 endif()
 
-if(LIBIGL_BUILD_TESTS)
-	include(CTest)
-	enable_testing()
-	add_subdirectory(tests)
+################################################################################
+# Install CMake config files
+################################################################################
+
+if(LIBIGL_INSTALL)
+    include(GNUInstallDirs)
+    set(project_config_in "${PROJECT_SOURCE_DIR}/cmake/igl/libigl-config.cmake.in")
+    set(project_config_out "${CMAKE_CURRENT_BINARY_DIR}/libigl-config.cmake")
+    set(config_targets_base "LibiglConfigTargets")
+    set(version_config_file "${CMAKE_CURRENT_BINARY_DIR}/LibiglConfigVersion.cmake")
+    set(export_dest_dir "${CMAKE_INSTALL_LIBDIR}/cmake/igl")
+
+    foreach(suffix IN ITEMS "") #"_restricted" "_copyleft")
+        install(EXPORT LibiglTargets${suffix}
+            DESTINATION ${export_dest_dir}
+            NAMESPACE igl${suffix}::
+            FILE ${config_targets_base}${suffix}.cmake
+            COMPONENT LibiglDevelopment
+        )
+    endforeach()
+
+    include(CMakePackageConfigHelpers)
+    configure_package_config_file(
+            "${project_config_in}"
+            "${project_config_out}"
+        INSTALL_DESTINATION
+            ${CMAKE_INSTALL_DATAROOTDIR}/libigl/cmake
+    )
+
+    write_basic_package_version_file("${version_config_file}" COMPATIBILITY SameMajorVersion)
+    install(FILES "${project_config_out}" "${version_config_file}" DESTINATION "${export_dest_dir}")
 endif()
 
-if(LIBIGL_TOPLEVEL_PROJECT)
-	# Set folders for Visual Studio/Xcode
-	igl_set_folders()
-endif()

LibiglOptions.cmake.sample

@@ -0,0 +1,78 @@
+# If you are cloning and compiling the libigl repository as a standalone, you
+# can use this file as a convenience to set default CMake options. Simply copy
+# this file and remove the '.sample' suffix. Then, uncomment the relevant
+# options as desired. Note that this file is included before `project(Libigl)`
+# is defined, so we can use it to define the C and C++ compilers, but some
+# variables such as PROJECT_SOURCE_DIR will not be defined yet. You can use
+# CMAKE_SOURCE_DIR instead.
+#
+# If you are using libigl as a subproject (e.g. see the libigl-example-project
+# template), then you do NOT need to use this file. Simply set your preferred
+# CMake options in the parent project, # before including libigl.
+
+################################################################################
+# CMake Options
+################################################################################
+
+# Specify a custom install prefix path
+# set(CMAKE_INSTALL_PREFIX ${CMAKE_SOURCE_DIR}/install CACHE STRING "Install directory used by install().")
+
+# Generates a `compile_commands.json` that can be used for autocompletion
+# set(CMAKE_EXPORT_COMPILE_COMMANDS ON CACHE BOOL "Enable/Disable output of compile commands during generation.")
+
+# Use ccache to speed up compilation of repeated builds
+# find_program(CCACHE_PROGRAM ccache)
+# if(CCACHE_PROGRAM)
+#     message(STATUS "Enabling Ccache support")
+#     set(CMAKE_C_COMPILER_LAUNCHER ${CCACHE_PROGRAM} CACHE STRING "")
+#     set(CMAKE_CXX_COMPILER_LAUNCHER ${CCACHE_PROGRAM} CACHE STRING "")
+# endif()
+
+# Use a specific C/C++ compiler, e.g. llvm-clang on macOS (so we can use clangd)
+# set(CMAKE_C_COMPILER   "/usr/bin/clang" CACHE STRING "C compiler")
+# set(CMAKE_CXX_COMPILER "/usr/bin/clang++" CACHE STRING "C++ compiler")
+
+# Set deployment platform for macOS
+# set(CMAKE_OSX_DEPLOYMENT_TARGET 10.12 CACHE STRING "macOS deployment target")
+
+# Always add colored output (e.g. when using Ninja)
+# add_compile_options(-fdiagnostics-color=always) # GCC
+# add_compile_options(-fcolor-diagnostics) # Clang
+
+# add_compile_options(-ftime-trace) # Clang
+
+################################################################################
+# Libigl Options
+################################################################################
+
+# Build options
+# option(LIBIGL_BUILD_TESTS        "Build libigl unit test"                OFF)
+# option(LIBIGL_BUILD_TUTORIALS    "Build libigl tutorial"                 OFF)
+# option(LIBIGL_INSTALL            "Enable installation of libigl targets" OFF)
+# option(LIBIGL_USE_STATIC_LIBRARY "Use libigl as static library"          OFF)
+
+# Module options
+# option(LIBIGL_EMBREE              "Build target igl::embree"              ON)
+# option(LIBIGL_GLFW                "Build target igl::glfw"                ON)
+# option(LIBIGL_IMGUI               "Build target igl::imgui"               ON)
+# option(LIBIGL_OPENGL              "Build target igl::opengl"              ON)
+# option(LIBIGL_STB                 "Build target igl::stb"                 ON)
+# option(LIBIGL_PREDICATES          "Build target igl::predicates"          ON)
+# option(LIBIGL_XML                 "Build target igl::xml"                 ON)
+# option(LIBIGL_COPYLEFT_CGAL       "Build target igl_copyleft::cgal"       ON)
+# option(LIBIGL_COPYLEFT_COMISO     "Build target igl_copyleft::comiso"     ON)
+# option(LIBIGL_COPYLEFT_CORE       "Build target igl_copyleft::core"       ON)
+# option(LIBIGL_COPYLEFT_CORK       "Build target igl_copyleft::cork"       ON)
+# option(LIBIGL_COPYLEFT_TETGEN     "Build target igl_copyleft::tetgen"     ON)
+# option(LIBIGL_RESTRICTED_MATLAB   "Build target igl_restricted::matlab"   ON)
+# option(LIBIGL_RESTRICTED_MOSEK    "Build target igl_restricted::mosek"    ON)
+# option(LIBIGL_RESTRICTED_TRIANGLE "Build target igl_restricted::triangle" ON)
+
+################################################################################
+# FetchContent Options
+################################################################################
+
+# option(FETCHCONTENT_FULLY_DISCONNECTED   "Disables all attempts to download or update content and assumes source dirs already exist" ON)
+# option(FETCHCONTENT_UPDATES_DISCONNECTED "Enables UPDATE_DISCONNECTED behavior for all content population" ON)
+# option(FETCHCONTENT_QUIET                "Enables QUIET option for all content population" ON)
+# set(FETCHCONTENT_BASE_DIR "${CMAKE_SOURCE_DIR}/external" CACHE PATH "Directory under which to collect all populated content")

README.md

@@ -1,7 +1,13 @@
 # libigl - A simple C++ geometry processing library
-[![](https://github.com/libigl/libigl/workflows/Build/badge.svg)](https://github.com/libigl/libigl/actions)
+
+[![](https://github.com/libigl/libigl/workflows/Build/badge.svg?event=push)](https://github.com/libigl/libigl/actions?query=workflow%3ABuild+branch%3Amain+event%3Apush)
 [![](https://anaconda.org/conda-forge/igl/badges/installer/conda.svg)](https://anaconda.org/conda-forge/igl)
 
 ![](https://libigl.github.io/libigl-teaser.png)
 
 Documentation, tutorial, and instructions at <https://libigl.github.io>.
+
+
+| 🆕 Doxygen Documentation |
+|:---|
+| The latest version of libigl (v2.5.0) introduces [doxygen generated detailed documentation](https://libigl.github.io/dox/index.html) |

cmake/CXXFeatures.cmake

@@ -1,85 +0,0 @@
-################################################################################
-
-if(NOT (${CMAKE_VERSION} VERSION_LESS "3.8.0"))
-  # For CMake 3.8 and above, we can use meta features directly provided by CMake itself
-  set(CXX11_FEATURES cxx_std_11)
-  set(CXX14_FEATURES cxx_std_14)
-  set(CXX17_FEATURES cxx_std_17)
-  return()
-endif()
-
-################################################################################
-
-set(CXX11_FEATURES
-  cxx_auto_type
-  cxx_constexpr
-)
-
-set(CXX14_FEATURES
-  cxx_generic_lambdas
-)
-
-set(CXX17_FEATURES
-
-)
-
-################################################################################
-
-# https://cmake.org/cmake/help/v3.1/prop_gbl/CMAKE_CXX_KNOWN_FEATURES.html
-# cxx_aggregate_default_initializers    Aggregate default initializers, as defined in N3605.
-# cxx_alias_templates                   Template aliases, as defined in N2258.
-# cxx_alignas                           Alignment control alignas, as defined in N2341.
-# cxx_alignof                           Alignment control alignof, as defined in N2341.
-# cxx_attributes                        Generic attributes, as defined in N2761.
-# cxx_attribute_deprecated              deprecated]] attribute, as defined in N3760.
-# cxx_auto_type                         Automatic type deduction, as defined in N1984.
-# cxx_binary_literals                   Binary literals, as defined in N3472.
-# cxx_constexpr                         Constant expressions, as defined in N2235.
-# cxx_contextual_conversions            Contextual conversions, as defined in N3323.
-# cxx_decltype_incomplete_return_types  Decltype on incomplete return types, as defined in N3276.
-# cxx_decltype                          Decltype, as defined in N2343.
-# cxx_decltype_auto                     decltype(auto) semantics, as defined in N3638.
-# cxx_default_function_template_args    Default template arguments for function templates, as defined in DR226
-# cxx_defaulted_functions               Defaulted functions, as defined in N2346.
-# cxx_defaulted_move_initializers       Defaulted move initializers, as defined in N3053.
-# cxx_delegating_constructors           Delegating constructors, as defined in N1986.
-# cxx_deleted_functions                 Deleted functions, as defined in N2346.
-# cxx_digit_separators                  Digit separators, as defined in N3781.
-# cxx_enum_forward_declarations         Enum forward declarations, as defined in N2764.
-# cxx_explicit_conversions              Explicit conversion operators, as defined in N2437.
-# cxx_extended_friend_declarations      Extended friend declarations, as defined in N1791.
-# cxx_extern_templates                  Extern templates, as defined in N1987.
-# cxx_final                             Override control final keyword, as defined in N2928, N3206 and N3272.
-# cxx_func_identifier                   Predefined __func__ identifier, as defined in N2340.
-# cxx_generalized_initializers          Initializer lists, as defined in N2672.
-# cxx_generic_lambdas                   Generic lambdas, as defined in N3649.
-# cxx_inheriting_constructors           Inheriting constructors, as defined in N2540.
-# cxx_inline_namespaces                 Inline namespaces, as defined in N2535.
-# cxx_lambdas                           Lambda functions, as defined in N2927.
-# cxx_lambda_init_captures              Initialized lambda captures, as defined in N3648.
-# cxx_local_type_template_args          Local and unnamed types as template arguments, as defined in N2657.
-# cxx_long_long_type                    long long type, as defined in N1811.
-# cxx_noexcept                          Exception specifications, as defined in N3050.
-# cxx_nonstatic_member_init             Non-static data member initialization, as defined in N2756.
-# cxx_nullptr                           Null pointer, as defined in N2431.
-# cxx_override                          Override control override keyword, as defined in N2928, N3206 and N3272.
-# cxx_range_for                         Range-based for, as defined in N2930.
-# cxx_raw_string_literals               Raw string literals, as defined in N2442.
-# cxx_reference_qualified_functions     Reference qualified functions, as defined in N2439.
-# cxx_relaxed_constexpr                 Relaxed constexpr, as defined in N3652.
-# cxx_return_type_deduction             Return type deduction on normal functions, as defined in N3386.
-# cxx_right_angle_brackets              Right angle bracket parsing, as defined in N1757.
-# cxx_rvalue_references                 R-value references, as defined in N2118.
-# cxx_sizeof_member                     Size of non-static data members, as defined in N2253.
-# cxx_static_assert                     Static assert, as defined in N1720.
-# cxx_strong_enums                      Strongly typed enums, as defined in N2347.
-# cxx_thread_local                      Thread-local variables, as defined in N2659.
-# cxx_trailing_return_types             Automatic function return type, as defined in N2541.
-# cxx_unicode_literals                  Unicode string literals, as defined in N2442.
-# cxx_uniform_initialization            Uniform initialization, as defined in N2640.
-# cxx_unrestricted_unions               Unrestricted unions, as defined in N2544.
-# cxx_user_literals                     User-defined literals, as defined in N2765.
-# cxx_variable_templates                Variable templates, as defined in N3651.
-# cxx_variadic_macros                   Variadic macros, as defined in N1653.
-# cxx_variadic_templates                Variadic templates, as defined in N2242.
-# cxx_template_template_parameters      Template template parameters, as defined in ISO/IEC 14882:1998.

cmake/DownloadProject.CMakeLists.cmake.in

@@ -1,17 +0,0 @@
-# Distributed under the OSI-approved MIT License.  See accompanying
-# file LICENSE or https://github.com/Crascit/DownloadProject for details.
-
-cmake_minimum_required(VERSION 2.8.2)
-
-project(${DL_ARGS_PROJ}-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(${DL_ARGS_PROJ}-download
-                    ${DL_ARGS_UNPARSED_ARGUMENTS}
-                    SOURCE_DIR          "${DL_ARGS_SOURCE_DIR}"
-                    BINARY_DIR          "${DL_ARGS_BINARY_DIR}"
-                    CONFIGURE_COMMAND   ""
-                    BUILD_COMMAND       ""
-                    INSTALL_COMMAND     ""
-                    TEST_COMMAND        ""
-)

cmake/DownloadProject.cmake

@@ -1,182 +0,0 @@
-# Distributed under the OSI-approved MIT License.  See accompanying
-# file LICENSE or https://github.com/Crascit/DownloadProject for details.
-#
-# MODULE:   DownloadProject
-#
-# PROVIDES:
-#   download_project( PROJ projectName
-#                    [PREFIX prefixDir]
-#                    [DOWNLOAD_DIR downloadDir]
-#                    [SOURCE_DIR srcDir]
-#                    [BINARY_DIR binDir]
-#                    [QUIET]
-#                    ...
-#   )
-#
-#       Provides the ability to download and unpack a tarball, zip file, git repository,
-#       etc. at configure time (i.e. when the cmake command is run). How the downloaded
-#       and unpacked contents are used is up to the caller, but the motivating case is
-#       to download source code which can then be included directly in the build with
-#       add_subdirectory() after the call to download_project(). Source and build
-#       directories are set up with this in mind.
-#
-#       The PROJ argument is required. The projectName value will be used to construct
-#       the following variables upon exit (obviously replace projectName with its actual
-#       value):
-#
-#           projectName_SOURCE_DIR
-#           projectName_BINARY_DIR
-#
-#       The SOURCE_DIR and BINARY_DIR arguments are optional and would not typically
-#       need to be provided. They can be specified if you want the downloaded source
-#       and build directories to be located in a specific place. The contents of
-#       projectName_SOURCE_DIR and projectName_BINARY_DIR will be populated with the
-#       locations used whether you provide SOURCE_DIR/BINARY_DIR or not.
-#
-#       The DOWNLOAD_DIR argument does not normally need to be set. It controls the
-#       location of the temporary CMake build used to perform the download.
-#
-#       The PREFIX argument can be provided to change the base location of the default
-#       values of DOWNLOAD_DIR, SOURCE_DIR and BINARY_DIR. If all of those three arguments
-#       are provided, then PREFIX will have no effect. The default value for PREFIX is
-#       CMAKE_BINARY_DIR.
-#
-#       The QUIET option can be given if you do not want to show the output associated
-#       with downloading the specified project.
-#
-#       In addition to the above, any other options are passed through unmodified to
-#       ExternalProject_Add() to perform the actual download, patch and update steps.
-#       The following ExternalProject_Add() options are explicitly prohibited (they
-#       are reserved for use by the download_project() command):
-#
-#           CONFIGURE_COMMAND
-#           BUILD_COMMAND
-#           INSTALL_COMMAND
-#           TEST_COMMAND
-#
-#       Only those ExternalProject_Add() arguments which relate to downloading, patching
-#       and updating of the project sources are intended to be used. Also note that at
-#       least one set of download-related arguments are required.
-#
-#       If using CMake 3.2 or later, the UPDATE_DISCONNECTED option can be used to
-#       prevent a check at the remote end for changes every time CMake is run
-#       after the first successful download. See the documentation of the ExternalProject
-#       module for more information. It is likely you will want to use this option if it
-#       is available to you. Note, however, that the ExternalProject implementation contains
-#       bugs which result in incorrect handling of the UPDATE_DISCONNECTED option when
-#       using the URL download method or when specifying a SOURCE_DIR with no download
-#       method. Fixes for these have been created, the last of which is scheduled for
-#       inclusion in CMake 3.8.0. Details can be found here:
-#
-#           https://gitlab.kitware.com/cmake/cmake/commit/bdca68388bd57f8302d3c1d83d691034b7ffa70c
-#           https://gitlab.kitware.com/cmake/cmake/issues/16428
-#
-#       If you experience build errors related to the update step, consider avoiding
-#       the use of UPDATE_DISCONNECTED.
-#
-# EXAMPLE USAGE:
-#
-#   include(DownloadProject)
-#   download_project(PROJ                googletest
-#                    GIT_REPOSITORY      https://github.com/google/googletest.git
-#                    GIT_TAG             master
-#                    UPDATE_DISCONNECTED 1
-#                    QUIET
-#   )
-#
-#   add_subdirectory(${googletest_SOURCE_DIR} ${googletest_BINARY_DIR})
-#
-#========================================================================================
-
-
-set(_DownloadProjectDir "${CMAKE_CURRENT_LIST_DIR}")
-
-include(CMakeParseArguments)
-
-function(download_project)
-
-    set(options QUIET)
-    set(oneValueArgs
-        PROJ
-        PREFIX
-        DOWNLOAD_DIR
-        SOURCE_DIR
-        BINARY_DIR
-        # Prevent the following from being passed through
-        CONFIGURE_COMMAND
-        BUILD_COMMAND
-        INSTALL_COMMAND
-        TEST_COMMAND
-    )
-    set(multiValueArgs "")
-
-    cmake_parse_arguments(DL_ARGS "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
-
-    # Hide output if requested
-    if (DL_ARGS_QUIET)
-        set(OUTPUT_QUIET "OUTPUT_QUIET")
-    else()
-        unset(OUTPUT_QUIET)
-        message(STATUS "Downloading/updating ${DL_ARGS_PROJ}")
-    endif()
-
-    # Set up where we will put our temporary CMakeLists.txt file and also
-    # the base point below which the default source and binary dirs will be.
-    # The prefix must always be an absolute path.
-    if (NOT DL_ARGS_PREFIX)
-        set(DL_ARGS_PREFIX "${CMAKE_BINARY_DIR}")
-    else()
-        get_filename_component(DL_ARGS_PREFIX "${DL_ARGS_PREFIX}" ABSOLUTE
-                               BASE_DIR "${CMAKE_CURRENT_BINARY_DIR}")
-    endif()
-    if (NOT DL_ARGS_DOWNLOAD_DIR)
-        set(DL_ARGS_DOWNLOAD_DIR "${DL_ARGS_PREFIX}/${DL_ARGS_PROJ}-download")
-    endif()
-
-    # Ensure the caller can know where to find the source and build directories
-    if (NOT DL_ARGS_SOURCE_DIR)
-        set(DL_ARGS_SOURCE_DIR "${DL_ARGS_PREFIX}/${DL_ARGS_PROJ}-src")
-    endif()
-    if (NOT DL_ARGS_BINARY_DIR)
-        set(DL_ARGS_BINARY_DIR "${DL_ARGS_PREFIX}/${DL_ARGS_PROJ}-build")
-    endif()
-    set(${DL_ARGS_PROJ}_SOURCE_DIR "${DL_ARGS_SOURCE_DIR}" PARENT_SCOPE)
-    set(${DL_ARGS_PROJ}_BINARY_DIR "${DL_ARGS_BINARY_DIR}" PARENT_SCOPE)
-
-    # The way that CLion manages multiple configurations, it causes a copy of
-    # the CMakeCache.txt to be copied across due to it not expecting there to
-    # be a project within a project.  This causes the hard-coded paths in the
-    # cache to be copied and builds to fail.  To mitigate this, we simply
-    # remove the cache if it exists before we configure the new project.  It
-    # is safe to do so because it will be re-generated.  Since this is only
-    # executed at the configure step, it should not cause additional builds or
-    # downloads.
-    file(REMOVE "${DL_ARGS_DOWNLOAD_DIR}/CMakeCache.txt")
-
-    # Create and build a separate CMake project to carry out the download.
-    # If we've already previously done these steps, they will not cause
-    # anything to be updated, so extra rebuilds of the project won't occur.
-    # Make sure to pass through CMAKE_MAKE_PROGRAM in case the main project
-    # has this set to something not findable on the PATH.
-    configure_file("${_DownloadProjectDir}/DownloadProject.CMakeLists.cmake.in"
-                   "${DL_ARGS_DOWNLOAD_DIR}/CMakeLists.txt")
-    execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}"
-                        -D "CMAKE_MAKE_PROGRAM:FILE=${CMAKE_MAKE_PROGRAM}"
-                        .
-                    RESULT_VARIABLE result
-                    ${OUTPUT_QUIET}
-                    WORKING_DIRECTORY "${DL_ARGS_DOWNLOAD_DIR}"
-    )
-    if(result)
-        message(FATAL_ERROR "CMake step for ${DL_ARGS_PROJ} failed: ${result}")
-    endif()
-    execute_process(COMMAND ${CMAKE_COMMAND} --build .
-                    RESULT_VARIABLE result
-                    ${OUTPUT_QUIET}
-                    WORKING_DIRECTORY "${DL_ARGS_DOWNLOAD_DIR}"
-    )
-    if(result)
-        message(FATAL_ERROR "Build step for ${DL_ARGS_PROJ} failed: ${result}")
-    endif()
-
-endfunction()

cmake/FindCORK.cmake

@@ -1,52 +0,0 @@
-#
-# Try to find CORK library and include path.
-# Once done this will define
-#
-# CORK_FOUND
-# CORK_INCLUDE_DIR
-# CORK_LIBRARIES
-#
-
-if(NOT CORK_FOUND)
-
-FIND_PATH(CORK_INCLUDE_DIR cork.h
-  PATHS
-    ${PROJECT_SOURCE_DIR}/../../external/cork/include
-    ${PROJECT_SOURCE_DIR}/../external/cork/include
-    ${PROJECT_SOURCE_DIR}/external/cork/include
-    /usr/local/include
-    /usr/X11/include
-    /usr/include
-    /opt/local/include
-    NO_DEFAULT_PATH
-    )
-
-FIND_LIBRARY( CORK_LIBRARIES NAMES cork
-  PATHS
-    ${PROJECT_SOURCE_DIR}/../../external/cork/lib/
-    ${PROJECT_SOURCE_DIR}/../external/cork/lib/
-    ${PROJECT_SOURCE_DIR}/external/cork/lib/
-    /usr/local
-    /usr/X11
-    /usr
-    PATH_SUFFIXES
-    a
-    lib64
-    lib
-    NO_DEFAULT_PATH
-)
-
-SET(CORK_FOUND "NO")
-IF (CORK_INCLUDE_DIR AND CORK_LIBRARIES)
-	SET(CORK_FOUND "YES")
-ENDIF (CORK_INCLUDE_DIR AND CORK_LIBRARIES)
-
-if(CORK_FOUND)
-  message(STATUS "Found CORK: ${CORK_INCLUDE_DIR}")
-else(CORK_FOUND)
-  if (NOT CORK_FIND_QUIETLY)
-    message(FATAL_ERROR "could NOT find CORK")
-  endif (NOT CORK_FIND_QUIETLY)
-endif(CORK_FOUND)
-
-endif(NOT CORK_FOUND)

cmake/LibiglDownloadExternal.cmake

@@ -1,190 +0,0 @@
-################################################################################
-include(DownloadProject)
-
-# With CMake 3.8 and above, we can hide warnings about git being in a
-# detached head by passing an extra GIT_CONFIG option.
-set(LIBIGL_EXTRA_OPTIONS TLS_VERIFY OFF)
-if(NOT (${CMAKE_VERSION} VERSION_LESS "3.8.0"))
-	list(APPEND LIBIGL_EXTRA_OPTIONS GIT_CONFIG advice.detachedHead=false)
-endif()
-
-# On CMake 3.6.3 and above, there is an option to use shallow clones of git repositories.
-# The shallow clone option only works with real tags, not SHA1, so we use a separate option.
-set(LIBIGL_BRANCH_OPTIONS)
-if(NOT (${CMAKE_VERSION} VERSION_LESS "3.6.3"))
-	# Disabled for now until we can make sure that it has no adverse effects
-	# (Downside is that the eigen mirror is huge again)
-	# list(APPEND LIBIGL_BRANCH_OPTIONS GIT_SHALLOW 1)
-endif()
-
-option(LIBIGL_SKIP_DOWNLOAD "Skip downloading external libraries" OFF)
-
-# Shortcut functions
-function(igl_download_project_aux name source)
-	if(NOT LIBIGL_SKIP_DOWNLOAD)
-		download_project(
-			PROJ         ${name}
-			SOURCE_DIR   "${source}"
-			DOWNLOAD_DIR "${LIBIGL_EXTERNAL}/.cache/${name}"
-			QUIET
-			${LIBIGL_EXTRA_OPTIONS}
-			${ARGN}
-		)
-	endif()
-endfunction()
-
-function(igl_download_project name)
-	igl_download_project_aux(${name} "${LIBIGL_EXTERNAL}/${name}" ${ARGN})
-endfunction()
-
-################################################################################
-
-## CGAL
-function(igl_download_cgal)
-	igl_download_project(cgal
-		GIT_REPOSITORY https://github.com/CGAL/cgal.git
-		GIT_TAG        f7c3c8212b56c0d6dae63787efc99093f4383415
-	)
-endfunction()
-
-## CoMISo
-function(igl_download_comiso)
-	igl_download_project(CoMISo
-		GIT_REPOSITORY https://github.com/libigl/CoMISo.git
-		GIT_TAG        1f9618cf9b7bd77370d817976470d59091928606
-	)
-endfunction()
-
-## Cork
-function(igl_download_cork)
-	igl_download_project(cork
-		GIT_REPOSITORY https://github.com/libigl/cork.git
-		GIT_TAG        27ad8a285838f5a480d856429e39d3d56d4338f9
-	)
-endfunction()
-
-## Eigen
-set(LIBIGL_EIGEN_VERSION 3.3.7 CACHE STRING "Default version of Eigen used by libigl.")
-function(igl_download_eigen)
-	igl_download_project(eigen
-		GIT_REPOSITORY https://github.com/eigenteam/eigen-git-mirror.git
-		GIT_TAG        ${LIBIGL_EIGEN_VERSION}
-		${LIBIGL_BRANCH_OPTIONS}
-	)
-endfunction()
-
-## Embree
-function(igl_download_embree)
-	igl_download_project(embree
-		GIT_REPOSITORY https://github.com/embree/embree.git
-		GIT_TAG        v3.5.2
-		${LIBIGL_BRANCH_OPTIONS}
-	)
-endfunction()
-
-## glad
-function(igl_download_glad)
-	igl_download_project(glad
-		GIT_REPOSITORY https://github.com/libigl/libigl-glad.git
-		GIT_TAG        09b4969c56779f7ddf8e6176ec1873184aec890f
-	)
-endfunction()
-
-## GLFW
-function(igl_download_glfw)
-	igl_download_project(glfw
-		GIT_REPOSITORY https://github.com/glfw/glfw.git
-		GIT_TAG        3.3
-		${LIBIGL_BRANCH_OPTIONS}
-	)
-endfunction()
-
-## ImGui
-function(igl_download_imgui)
-	igl_download_project(imgui
-		GIT_REPOSITORY https://github.com/ocornut/imgui.git
-		GIT_TAG        v1.69
-		${LIBIGL_BRANCH_OPTIONS}
-	)
-	igl_download_project(libigl-imgui
-		GIT_REPOSITORY https://github.com/libigl/libigl-imgui.git
-		GIT_TAG        07ecd3858acc71e70f0f9b2dea20a139bdddf8ae
-	)
-endfunction()
-
-## pybind11
-function(igl_download_pybind11)
-	igl_download_project(pybind11
-		GIT_REPOSITORY https://github.com/pybind/pybind11.git
-		GIT_TAG        2d0507db43cd5a117f7843e053b17dffca114107
-	)
-endfunction()
-
-## stb_image
-function(igl_download_stb)
-	igl_download_project(stb
-		GIT_REPOSITORY https://github.com/libigl/libigl-stb.git
-		GIT_TAG        cd0fa3fcd90325c83be4d697b00214e029f94ca3
-	)
-endfunction()
-
-## TetGen
-function(igl_download_tetgen)
-	igl_download_project(tetgen
-		GIT_REPOSITORY https://github.com/jdumas/tetgen.git
-		GIT_TAG        c63e7a6434652b8a2065c835bd9d6d298db1a0bc
-	)
-endfunction()
-
-## TinyXML
-function(igl_download_tinyxml2)
-	igl_download_project(tinyxml2
-		GIT_REPOSITORY https://github.com/leethomason/tinyxml2.git
-		GIT_TAG        d175e9de0be0d4db75d0a8cf065599a435a87eb6
-	)
-endfunction()
-
-## Triangle
-function(igl_download_triangle)
-	igl_download_project(triangle
-		GIT_REPOSITORY https://github.com/libigl/triangle.git
-		GIT_TAG        d284c4a843efac043c310f5fa640b17cf7d96170
-	)
-endfunction()
-
-## Catch2
-function(igl_download_catch2)
-	igl_download_project(catch2
-		GIT_REPOSITORY https://github.com/catchorg/Catch2.git
-		GIT_TAG        v2.11.0
-	)
-endfunction()
-
-## Predicates
-function(igl_download_predicates)
-	igl_download_project(predicates
-		GIT_REPOSITORY https://github.com/libigl/libigl-predicates.git
-		GIT_TAG        5a1d2194ec114bff51d5a33230586cafb83adc86
-	)
-endfunction()
-
-################################################################################
-
-## Test data
-function(igl_download_test_data)
-	igl_download_project_aux(test_data
-		"${LIBIGL_EXTERNAL}/../tests/data"
-		GIT_REPOSITORY https://github.com/libigl/libigl-tests-data
-		GIT_TAG        b5dddf45e329af685cd107e38770a28cfc18eb15
-	)
-endfunction()
-
-## Tutorial data
-function(igl_download_tutorial_data)
-	igl_download_project_aux(tutorial_data
-		"${LIBIGL_EXTERNAL}/../tutorial/data"
-		GIT_REPOSITORY https://github.com/libigl/libigl-tutorial-data
-		GIT_TAG        5c6a1ea809c043d71e5595775709c15325a7158c
-	)
-endfunction()
-

cmake/LibiglFolders.cmake

@@ -1,116 +0,0 @@
-# Sort projects inside the solution
-set_property(GLOBAL PROPERTY USE_FOLDERS ON)
-
-function(igl_folder_targets FOLDER_NAME)
-    foreach(target IN ITEMS ${ARGN})
-        if(TARGET ${target})
-            get_target_property(TYPE ${target} TYPE)
-            if(NOT (TYPE STREQUAL "INTERFACE_LIBRARY"))
-                set_target_properties(${target} PROPERTIES FOLDER "${FOLDER_NAME}")
-            endif()
-        endif()
-    endforeach()
-endfunction()
-
-function(igl_set_folders)
-
-igl_folder_targets("ThirdParty/Embree"
-    algorithms
-    embree
-    lexers
-    math
-    simd
-    sys
-    tasking
-)
-
-igl_folder_targets("ThirdParty"
-    CoMISo
-    glad
-    glfw
-    imgui
-    predicates
-    tetgen
-    tinyxml2
-    triangle
-)
-
-igl_folder_targets("Libigl"
-    igl
-    igl_comiso
-    igl_embree
-    igl_opengl
-    igl_opengl_glfw
-    igl_opengl_glfw_imgui
-    igl_png
-    igl_predicates
-    igl_stb_image
-    igl_tetgen
-    igl_triangle
-    igl_xml
-)
-
-igl_folder_targets("Unit Tests"
-    libigl_tests
-)
-
-igl_folder_targets("Tutorials"
-    101_FileIO_bin
-    102_DrawMesh_bin
-    103_Events_bin
-    104_Colors_bin
-    105_Overlays_bin
-    106_ViewerMenu_bin
-    107_MultipleMeshes_bin
-    108_MultipleViews_bin
-    201_Normals_bin
-    202_GaussianCurvature_bin
-    203_CurvatureDirections_bin
-    204_Gradient_bin
-    205_Laplacian_bin
-    206_GeodesicDistance_bin
-    301_Slice_bin
-    302_Sort_bin
-    303_LaplaceEquation_bin
-    304_LinearEqualityConstraints_bin
-    305_QuadraticProgramming_bin
-    306_EigenDecomposition_bin
-    401_BiharmonicDeformation_bin
-    402_PolyharmonicDeformation_bin
-    403_BoundedBiharmonicWeights_bin
-    404_DualQuaternionSkinning_bin
-    405_AsRigidAsPossible_bin
-    406_FastAutomaticSkinningTransformations_bin
-    407_BiharmonicCoordinates_bin
-    501_HarmonicParam_bin
-    502_LSCMParam_bin
-    503_ARAPParam_bin
-    504_NRosyDesign_bin
-    505_MIQ_bin
-    506_FrameField_bin
-    507_Planarization_bin
-    601_Serialization_bin
-    604_Triangle_bin
-    605_Tetgen_bin
-    606_AmbientOcclusion_bin
-    607_ScreenCapture_bin
-    701_Statistics_bin
-    702_WindingNumber_bin
-    703_Decimation_bin
-    704_SignedDistance_bin
-    705_MarchingCubes_bin
-    706_FacetOrientation_bin
-    707_SweptVolume_bin
-    708_Picking_bin
-    709_SLIM_bin
-    710_SCAF_bin
-    711_Subdivision_bin
-    712_DataSmoothing_bin
-    713_ShapeUp_bin
-    714_MarchingTets_bin
-    715_MeshImplicitFunction_bin
-    716_HeatGeodesics_bin
-    718_IterativeClosestPoint_bin
-)
-
-endfunction()

cmake/LibiglWindows.cmake

@@ -1,26 +0,0 @@
-if(MSVC)
-	option(IGL_STATIC_RUNTIME "Use libigl with the static MSVC runtime." OFF)
-	if(IGL_STATIC_RUNTIME)
-		message(STATUS "MSVC -> forcing use of statically-linked runtime.")
-		foreach(config ${CMAKE_CONFIGURATION_TYPES})
-			string(TOUPPER ${config} config)
-			string(REPLACE /MD /MT CMAKE_C_FLAGS_${config} "${CMAKE_C_FLAGS_${config}}")
-			string(REPLACE /MD /MT CMAKE_CXX_FLAGS_${config} "${CMAKE_CXX_FLAGS_${config}}")
-		endforeach()
-		string(REPLACE "/MDd" "/MTd" CMAKE_CXX_FLAGS_DEBUG ${CMAKE_CXX_FLAGS_DEBUG})
-	else()
-		message(STATUS "MSVC -> forcing use of dynamically-linked runtime.")
-		foreach(config ${CMAKE_CONFIGURATION_TYPES})
-			string(TOUPPER ${config} config)
-			string(REPLACE /MT /MD CMAKE_C_FLAGS_${config} "${CMAKE_C_FLAGS_${config}}")
-			string(REPLACE /MT /MD CMAKE_CXX_FLAGS_${config} "${CMAKE_CXX_FLAGS_${config}}")
-		endforeach()
-		string(REPLACE "/MTd" "/MDd" CMAKE_CXX_FLAGS_DEBUG ${CMAKE_CXX_FLAGS_DEBUG})
-	endif()
-
-	# https://github.com/mozilla/sccache/issues/242
-	if(CMAKE_CXX_COMPILER_LAUNCHER STREQUAL "sccache")
-		string(REGEX REPLACE "/Z[iI7]" "" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
-		set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /Z7")
-	endif()
-endif()

cmake/find/FindMOSEK.cmake

@@ -9,8 +9,10 @@
 
 # Hardcoded search paths
 set(SEARCH_PATHS
+  ${CMAKE_SOURCE_DIR}/mosek/9.2/tools/platform/osx64x86/ 
   /usr/local/mosek/7/tools/platform/osx64x86/
   /usr/local/mosek/8/tools/platform/osx64x86/
+  /usr/local/mosek/9.2/tools/platform/osx64x86/
   /opt/mosek/7/tools/platform/linux64x86/
 )
 

cmake/igl/igl_add_library.cmake

@@ -0,0 +1,80 @@
+# Creates a CMake target for a given libigl module. This convenience function also defines common
+# compilation flags, as well as installation rules for the target. Target sources and dependencies
+# need to be added separately.
+function(igl_add_library module_name)
+    # Check if category is `copyleft` or `restricted`
+    if(${module_name} MATCHES "^igl_copyleft")
+        set(suffix "_copyleft")
+    elseif(${module_name} MATCHES "^igl_restricted")
+        set(suffix "_restricted")
+    else()
+        set(suffix "")
+    endif()
+
+    # Check module name
+    if(NOT ${module_name} MATCHES "^igl_")
+        message(FATAL_ERROR "Libigl module name should start with 'igl_'")
+    endif()
+    string(REPLACE "igl${suffix}_" "" module_shortname ${module_name})
+
+    # Define target
+    if(LIBIGL_USE_STATIC_LIBRARY)
+        add_library(${module_name} STATIC)
+    else()
+        add_library(${module_name} INTERFACE)
+    endif()
+
+    # Alias target name
+    message(STATUS "Creating target: igl${suffix}::${module_shortname} (${module_name})")
+    add_library(igl${suffix}::${module_shortname} ALIAS ${module_name})
+
+    # Compile definitions
+    if(LIBIGL_USE_STATIC_LIBRARY)
+        target_compile_definitions(${module_name} ${IGL_SCOPE} -DIGL_STATIC_LIBRARY)
+    endif()
+
+    # C++17 features
+    target_compile_features(${module_name} ${IGL_SCOPE} cxx_std_17)
+
+    if(LIBIGL_WARNINGS_AS_ERRORS)
+      target_compile_options(${module_name} PRIVATE -Wall -Wextra -Wpedantic -Wno-sign-compare -Werror -Wno-gnu -Wno-unknown-pragmas)
+    endif()
+
+    # Other compilation flags
+    if(MSVC)
+        # Enable parallel compilation for Visual Studio
+        target_compile_options(${module_name} ${IGL_SCOPE} $<$<COMPILE_LANGUAGE:CXX>:/MP> $<$<COMPILE_LANGUAGE:CXX>:/bigobj>)
+        target_compile_definitions(${module_name} ${IGL_SCOPE} -DNOMINMAX)
+
+
+        # Silencing some compilation warnings
+        if(LIBIGL_USE_STATIC_LIBRARY)
+            target_compile_options(${module_name} PRIVATE
+                # Type conversion warnings. These can be fixed with some effort and possibly more verbose code.
+                /wd4267 # conversion from 'size_t' to 'type', possible loss of data
+                /wd4244 # conversion from 'type1' to 'type2', possible loss of data
+                /wd4018 # signed/unsigned mismatch
+                /wd4305 # truncation from 'double' to 'float'
+                # This one is from template instantiations generated by autoexplicit.sh:
+                /wd4667 # no function template defined that matches forced instantiation ()
+                # This one is easy to fix, just need to switch to safe version of C functions
+                /wd4996 # this function or variable may be unsafe
+                # This one is when using bools in adjacency matrices
+                /wd4804 #'+=': unsafe use of type 'bool' in operation
+            )
+        endif()
+    endif()
+
+    # Generate position independent code
+    if(LIBIGL_POSITION_INDEPENDENT_CODE)
+        set_target_properties(${module_name} PROPERTIES INTERFACE_POSITION_INDEPENDENT_CODE ON)
+        if(LIBIGL_USE_STATIC_LIBRARY)
+            set_target_properties(${module_name} PROPERTIES POSITION_INDEPENDENT_CODE ON)
+        endif()
+    endif()
+
+    # Folder for IDE
+    if(LIBIGL_USE_STATIC_LIBRARY OR CMAKE_VERSION VERSION_GREATER_EQUAL 3.19.0)
+        set_target_properties(${module_name} PROPERTIES FOLDER "Libigl")
+    endif()
+endfunction()

cmake/igl/igl_add_test.cmake

@@ -0,0 +1,51 @@
+function(igl_add_test module_name)
+    if(NOT LIBIGL_BUILD_TESTS)
+        return()
+    endif()
+
+    if(NOT TARGET ${module_name})
+        message(FATAL_ERROR "'${module_name}' is not a CMake target")
+    endif()
+
+    # Check if category is `copyleft` or `restricted`
+    if(${module_name} MATCHES "^igl_copyleft")
+        set(suffix "_copyleft")
+    elseif(${module_name} MATCHES "^igl_restricted")
+        set(suffix "_restricted")
+    else()
+        set(suffix "")
+    endif()
+
+    # Create test executable
+    add_executable(test_${module_name}
+        ${libigl_SOURCE_DIR}/tests/main.cpp
+        ${libigl_SOURCE_DIR}/tests/test_common.h
+        ${ARGN}
+    )
+
+    # Include headers
+    target_include_directories(test_${module_name} PUBLIC ${libigl_SOURCE_DIR}/tests)
+
+    # Compile definitions
+    target_compile_definitions(test_${module_name} PUBLIC CATCH_CONFIG_ENABLE_BENCHMARKING)
+
+    # Dependencies
+    include(catch2)
+    include(libigl_tests_data)
+    target_link_libraries(test_${module_name} PUBLIC
+        ${module_name}
+        igl::tests_data
+        Catch2::Catch2
+    )
+
+    # IDE Folder
+    set_target_properties(test_${module_name} PROPERTIES FOLDER Libigl_Tests)
+
+    # Output directory
+    set_target_properties(test_${module_name} PROPERTIES RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/tests")
+
+    # Register tests
+    FetchContent_GetProperties(catch2)
+    include("${catch2_SOURCE_DIR}/contrib/Catch.cmake")
+    catch_discover_tests(test_${module_name})
+endfunction()

cmake/igl/igl_add_tutorial.cmake

@@ -0,0 +1,29 @@
+function(igl_add_tutorial name)
+    # Only create tutorial if dependencies have been enabled in the current build
+    foreach(module IN ITEMS ${ARGN})
+        if(NOT TARGET ${module})
+            return()
+        endif()
+    endforeach()
+
+    message(STATUS "Creating libigl tutorial: ${name}")
+    # get all cpp files in ${CMAKE_CURRENT_SOURCE_DIR}/${name}/
+    file(GLOB SRCFILES ${CMAKE_CURRENT_SOURCE_DIR}/${name}/*.cpp)
+    add_executable(${name} ${SRCFILES})
+    target_link_libraries(${name} PRIVATE
+        igl::core
+        igl::tutorial_data
+        ${ARGN}
+    )
+
+    set_target_properties(${name} PROPERTIES FOLDER Libigl_Tutorials)
+
+    # Do this codesign only on macOS
+    # add_custom_command(TARGET your_target POST_BUILD COMMAND codesign -s - $<TARGET_FILE:your_target>
+    if(APPLE)
+      add_custom_command(TARGET ${name} POST_BUILD
+        COMMAND codesign -f -s - $<TARGET_FILE:${name}>
+        COMMENT "Codesigning ${name}"
+      )
+    endif()
+endfunction()

cmake/igl/igl_copy_dll.cmake

@@ -0,0 +1,101 @@
+# Transitively list all link libraries of a target (recursive call)
+function(igl_get_dependencies_recursive OUTPUT_VARIABLE TARGET)
+    get_target_property(_aliased ${TARGET} ALIASED_TARGET)
+    if(_aliased)
+        set(TARGET ${_aliased})
+    endif()
+
+    get_target_property(_IMPORTED ${TARGET} IMPORTED)
+    get_target_property(_TYPE ${TARGET} TYPE)
+    if(_IMPORTED OR (${_TYPE} STREQUAL "INTERFACE_LIBRARY"))
+        get_target_property(TARGET_DEPENDENCIES ${TARGET} INTERFACE_LINK_LIBRARIES)
+    else()
+        get_target_property(TARGET_DEPENDENCIES ${TARGET} LINK_LIBRARIES)
+    endif()
+
+    # MKL-specific list of runtime dependencies
+    get_property(RUNTIME_DEPENDENCIES TARGET ${TARGET} PROPERTY mkl_RUNTIME_DEPENDENCIES)
+    if(RUNTIME_DEPENDENCIES)
+        list(APPEND TARGET_DEPENDENCIES ${RUNTIME_DEPENDENCIES})
+    endif()
+
+    set(VISITED_TARGETS ${${OUTPUT_VARIABLE}})
+    foreach(DEPENDENCY IN ITEMS ${TARGET_DEPENDENCIES})
+        if(TARGET ${DEPENDENCY})
+            get_target_property(_aliased ${DEPENDENCY} ALIASED_TARGET)
+            if(_aliased)
+                set(DEPENDENCY ${_aliased})
+            endif()
+
+            if(NOT (DEPENDENCY IN_LIST VISITED_TARGETS))
+                list(APPEND VISITED_TARGETS ${DEPENDENCY})
+                igl_get_dependencies_recursive(VISITED_TARGETS ${DEPENDENCY})
+            endif()
+        endif()
+    endforeach()
+    set(${OUTPUT_VARIABLE} ${VISITED_TARGETS} PARENT_SCOPE)
+endfunction()
+
+# Transitively list all link libraries of a target
+function(igl_get_dependencies OUTPUT_VARIABLE TARGET)
+    set(DISCOVERED_TARGETS "")
+    igl_get_dependencies_recursive(DISCOVERED_TARGETS ${TARGET})
+    set(${OUTPUT_VARIABLE} ${DISCOVERED_TARGETS} PARENT_SCOPE)
+endfunction()
+
+# Copy .dll dependencies to a target executable's folder. This function must be called *after* all the CMake
+# dependencies of the executable target have been defined, otherwise some .dlls might not be copied to the target
+# folder.
+function(igl_copy_dll target)
+    if(NOT WIN32)
+        return()
+    endif()
+    if(NOT TARGET ${target})
+      message(STATUS "igl_copy_dll() was called with a non-target: ${target}")
+      return()
+    endif()
+
+    # Sanity checks
+    get_target_property(TYPE ${target} TYPE)
+    if(NOT ${TYPE} STREQUAL "EXECUTABLE")
+        message(FATAL_ERROR "igl_copy_dll() was called on a non-executable target: ${target}")
+    endif()
+
+    # Create a custom command to do the actual copy. This needs to be executed before Catch2's POST_BUILD command,
+    # so we define this as a PRE_LINK command for the executable target.
+    add_custom_command(
+        TARGET ${target}
+        PRE_LINK
+        COMMAND ${CMAKE_COMMAND} -E touch "${CMAKE_BINARY_DIR}/runtime_deps/copy_dll_${target}_$<CONFIG>.cmake"
+        COMMAND ${CMAKE_COMMAND} -P "${CMAKE_BINARY_DIR}/runtime_deps/copy_dll_${target}_$<CONFIG>.cmake"
+        COMMENT "Copying dlls for target ${target}"
+    )
+
+    # Retrieve all target dependencies
+    igl_get_dependencies(TARGET_DEPENDENCIES ${target})
+
+    # Iterate over dependencies, and create a copy rule for each .dll that we find
+    set(COPY_SCRIPT_CONTENT "")
+    foreach(DEPENDENCY IN ITEMS ${TARGET_DEPENDENCIES})
+        get_target_property(TYPE ${DEPENDENCY} TYPE)
+        if(NOT (${TYPE} STREQUAL "SHARED_LIBRARY" OR ${TYPE} STREQUAL "MODULE_LIBRARY"))
+            continue()
+        endif()
+
+        # Instruction to copy target file if it exists
+        string(APPEND COPY_SCRIPT_CONTENT
+            "if(EXISTS \"$<TARGET_FILE:${DEPENDENCY}>\")\n    "
+                "execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different "
+                "\"$<TARGET_FILE:${DEPENDENCY}>\" "
+                "\"$<TARGET_FILE_DIR:${target}>/$<TARGET_FILE_NAME:${DEPENDENCY}>\")\n"
+            "endif()\n"
+        )
+    endforeach()
+
+    # Finally generate one script for each configuration supported by this generator
+    message(STATUS "Populating copy rules for target: ${target}")
+    file(GENERATE
+        OUTPUT ${CMAKE_BINARY_DIR}/runtime_deps/copy_dll_${target}_$<CONFIG>.cmake
+        CONTENT "${COPY_SCRIPT_CONTENT}"
+    )
+endfunction()

cmake/igl/igl_include.cmake

@@ -0,0 +1,56 @@
+# Helper functions to include libigl modules
+function(_igl_include_full prefix name force)
+    string(TOUPPER "${prefix}" prefix_uc)
+    string(TOUPPER "${name}" name_uc)
+    if(prefix_uc)
+        string(PREPEND prefix_uc _)
+    endif()
+    string(TOLOWER "${prefix_uc}" prefix_lc)
+
+    if(TARGET igl${prefix_lc}::${name})
+        # Target already exists, skip
+        return()
+    endif()
+
+    if(${force} AND NOT ${name} STREQUAL "core")
+        message(STATUS "Forcing include of libigl module: ${name}")
+    endif()
+
+    # Dependencies are linked as INTERFACE targets unless libigl is compiled as a static library
+    if(LIBIGL_USE_STATIC_LIBRARY)
+        set(IGL_SCOPE PUBLIC)
+    else()
+        set(IGL_SCOPE INTERFACE)
+    endif()
+
+    # Retrieve module path use by libigl (necessary when calling igl_include() from a subproject)
+    get_property(igl_module_path GLOBAL PROPERTY __igl_module_path)
+    set(CMAKE_MODULE_PATH ${igl_module_path})
+
+    # Include igl target definition
+    if(LIBIGL${prefix_uc}_${name_uc} OR ${force})
+        include(${libigl_SOURCE_DIR}/cmake/igl/modules/${prefix}/${name}.cmake)
+    endif()
+endfunction()
+
+# Include module only if CMake option is provided
+function(igl_include_optional name)
+    if(ARGC GREATER_EQUAL 2)
+        # Two args given: prefix + name
+        _igl_include_full(${name} ${ARGV1} FALSE)
+    else()
+        # Only one arg given: prefix (which contains module name)
+        _igl_include_full("" ${name} FALSE)
+    endif()
+endfunction()
+
+# Include module only unconditionally (e.g. if module is a dependency of another module)
+function(igl_include name)
+    if(ARGC GREATER_EQUAL 2)
+        # Two args given: prefix + name
+        _igl_include_full(${name} ${ARGV1} TRUE)
+    else()
+        # Only one arg given: prefix (which contains module name)
+        _igl_include_full("" ${name} TRUE)
+    endif()
+endfunction()

cmake/igl/igl_install.cmake

@@ -0,0 +1,63 @@
+function(igl_install module_name)
+    if(NOT LIBIGL_INSTALL)
+        return()
+    endif()
+
+    # Check if category is `copyleft` or `restricted`
+    if(${module_name} MATCHES "^igl_copyleft")
+        set(suffix "_copyleft")
+    elseif(${module_name} MATCHES "^igl_restricted")
+        set(suffix "_restricted")
+    else()
+        set(suffix "")
+    endif()
+
+    ########################
+    # Install CMake target #
+    ########################
+
+    set_property(TARGET ${module_name} PROPERTY EXPORT_NAME ${module_export})
+
+    include(GNUInstallDirs)
+    install(TARGETS ${module_name}
+        EXPORT LibiglTargets${suffix}
+        RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+                COMPONENT LibiglRuntime
+        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+                COMPONENT          LibiglRuntime
+                NAMELINK_COMPONENT LibiglDevelopment
+        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+                COMPONENT LibiglRuntime
+        PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+                COMPONENT LibiglDevelopment
+        INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+    )
+
+    ###################
+    # Install headers #
+    ###################
+
+    # TODO: When moving module definition to their own CMakeLists.txt, we should
+    # refactor this to use the folder where the target was defined (via the
+    # target property SOURCE_DIR).
+    set(target_include_dir ${libigl_SOURCE_DIR}/include)
+    foreach(source_path IN ITEMS ${ARGN})
+        # Filter out .cpp files in "static lib" mode
+        if(LIBIGL_USE_STATIC_LIBRARY)
+            get_filename_component(extension ${source_path} LAST_EXT)
+            if(extension MATCHES ".cpp")
+                continue()
+            endif()
+        endif()
+
+        # Compute relative path to copy
+        get_filename_component(source_directory ${source_path} DIRECTORY)
+        file(RELATIVE_PATH source_subdir ${target_include_dir} ${source_directory})
+
+        # Create install rule to copy specific header
+        install(
+            FILES ${source_path}
+            DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/${source_subdir}
+        )
+    endforeach()
+endfunction()

cmake/igl/igl_target_sources.cmake

@@ -0,0 +1,8 @@
+function(igl_target_sources module_name)
+    if(${CMAKE_VERSION} VERSION_LESS 3.19 AND NOT LIBIGL_USE_STATIC_LIBRARY)
+        # Old approach: defines a dummy custom target for the IDE
+        add_custom_target(${module_name}_ SOURCES ${ARGN})
+    else()
+        target_sources(${module_name} PRIVATE ${ARGN})
+    endif()
+endfunction()

cmake/igl/igl_windows.cmake

@@ -0,0 +1,7 @@
+if(MSVC)
+	# https://github.com/mozilla/sccache/issues/242
+	if(CMAKE_CXX_COMPILER_LAUNCHER STREQUAL "sccache")
+		string(REGEX REPLACE "/Z[iI7]" "" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
+		set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /Z7")
+	endif()
+endif()

cmake/igl/libigl-config.cmake.in

@@ -0,0 +1,7 @@
+@PACKAGE_INIT@
+
+include(CMakeFindDependencyMacro)
+find_dependency(Eigen3 REQUIRED)
+find_dependency(Threads REQUIRED)
+include("${CMAKE_CURRENT_LIST_DIR}/LibiglConfigTargets.cmake")
+check_required_components(Libigl)

cmake/igl/modules/copyleft/cgal.cmake

@@ -0,0 +1,34 @@
+# 1. Define module
+igl_add_library(igl_copyleft_cgal)
+
+# 2. Include headers
+include(GNUInstallDirs)
+target_include_directories(igl_copyleft_cgal ${IGL_SCOPE}
+    $<BUILD_INTERFACE:${libigl_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+# 3. Target sources
+file(GLOB INC_FILES "${libigl_SOURCE_DIR}/include/igl/copyleft/cgal/*.h")
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/include/igl/copyleft/cgal/*.cpp")
+igl_target_sources(igl_copyleft_cgal ${INC_FILES} ${SRC_FILES})
+
+# 4. Dependencies
+include(cgal)
+igl_include(copyleft core)
+target_link_libraries(igl_copyleft_cgal ${IGL_SCOPE}
+    igl::core
+    igl_copyleft::core
+    CGAL::CGAL
+    CGAL::CGAL_Core
+)
+
+# 5. Unit tests
+file(GLOB SRC_FILES
+    "${libigl_SOURCE_DIR}/tests/include/igl/copyleft/boolean/*.cpp"
+    "${libigl_SOURCE_DIR}/tests/include/igl/copyleft/cgal/*.cpp"
+)
+igl_add_test(igl_copyleft_cgal ${SRC_FILES})
+if(TARGET test_igl_copyleft_cgal)
+    igl_copy_dll(test_igl_copyleft_cgal)
+endif()

cmake/igl/modules/copyleft/core.cmake

@@ -0,0 +1,19 @@
+# 1. Define module
+igl_add_library(igl_copyleft_core)
+
+# 2. Include headers
+include(GNUInstallDirs)
+target_include_directories(igl_copyleft_core ${IGL_SCOPE}
+    $<BUILD_INTERFACE:${libigl_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+# 3. Target sources
+file(GLOB INC_FILES "${libigl_SOURCE_DIR}/include/igl/copyleft/*.h")
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/include/igl/copyleft/*.cpp")
+igl_target_sources(igl_copyleft_core ${INC_FILES} ${SRC_FILES})
+
+# 4. Dependencies
+target_link_libraries(igl_copyleft_core ${IGL_SCOPE}
+    igl::core
+)

cmake/igl/modules/copyleft/tetgen.cmake

@@ -0,0 +1,27 @@
+# 1. Define module
+igl_add_library(igl_copyleft_tetgen)
+
+# 2. Include headers
+include(GNUInstallDirs)
+target_include_directories(igl_copyleft_tetgen ${IGL_SCOPE}
+    $<BUILD_INTERFACE:${libigl_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+# 3. Target sources
+file(GLOB INC_FILES "${libigl_SOURCE_DIR}/include/igl/copyleft/tetgen/*.h")
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/include/igl/copyleft/tetgen/*.cpp")
+igl_target_sources(igl_copyleft_tetgen ${INC_FILES} ${SRC_FILES})
+
+# 4. Dependencies
+include(tetgen)
+igl_include(copyleft core)
+target_link_libraries(igl_copyleft_tetgen ${IGL_SCOPE}
+    igl::core
+    igl_copyleft::core
+    tetgen::tetgen
+)
+
+# 5. Unit tests
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/tests/include/igl/copyleft/tetgen/*.cpp")
+igl_add_test(igl_copyleft_tetgen ${SRC_FILES})

cmake/igl/modules/core.cmake

@@ -0,0 +1,32 @@
+# 1. Define module
+igl_add_library(igl_core)
+if(LIBIGL_USE_STATIC_LIBRARY)
+    set_target_properties(igl_core PROPERTIES OUTPUT_NAME igl)
+endif()
+
+# 2. Include headers
+include(GNUInstallDirs)
+target_include_directories(igl_core ${IGL_SCOPE}
+    $<BUILD_INTERFACE:${libigl_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+# 3. Target sources
+file(GLOB INC_FILES "${libigl_SOURCE_DIR}/include/igl/*.h")
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/include/igl/*.cpp")
+igl_target_sources(igl_core ${INC_FILES} ${SRC_FILES})
+
+# 4. Install target & headers
+igl_install(igl_core ${INC_FILES} ${SRC_FILES})
+
+# 5. Dependencies
+include(eigen)
+find_package(Threads REQUIRED)
+target_link_libraries(igl_core ${IGL_SCOPE}
+    Eigen3::Eigen
+    Threads::Threads
+)
+
+# 6. Unit tests
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/tests/include/igl/*.cpp")
+igl_add_test(igl_core ${SRC_FILES})

cmake/igl/modules/embree.cmake

@@ -0,0 +1,25 @@
+# 1. Define module
+igl_add_library(igl_embree)
+
+# 2. Include headers
+include(GNUInstallDirs)
+target_include_directories(igl_embree ${IGL_SCOPE}
+    $<BUILD_INTERFACE:${libigl_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+# 3. Target sources
+file(GLOB INC_FILES "${libigl_SOURCE_DIR}/include/igl/embree/*.h")
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/include/igl/embree/*.cpp")
+igl_target_sources(igl_embree ${INC_FILES} ${SRC_FILES})
+
+# 4. Dependencies
+include(embree)
+target_link_libraries(igl_embree ${IGL_SCOPE}
+    igl::core
+    embree::embree
+)
+
+# 5. Unit tests
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/tests/include/igl/embree/*.cpp")
+igl_add_test(igl_embree ${SRC_FILES})

cmake/igl/modules/glfw.cmake

@@ -0,0 +1,29 @@
+# 1. Define module
+igl_add_library(igl_glfw)
+
+# 2. Include headers
+include(GNUInstallDirs)
+target_include_directories(igl_glfw ${IGL_SCOPE}
+    $<BUILD_INTERFACE:${libigl_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+# 3. Target sources
+file(GLOB INC_FILES "${libigl_SOURCE_DIR}/include/igl/opengl/glfw/*.h")
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/include/igl/opengl/glfw/*.cpp")
+igl_target_sources(igl_glfw ${INC_FILES} ${SRC_FILES})
+
+# 4. Dependencies
+include(glfw)
+igl_include(opengl)
+target_link_libraries(igl_glfw ${IGL_SCOPE}
+    igl::core
+    igl::opengl
+    glfw::glfw
+)
+
+# 5. Unit tests
+if(LIBIGL_GLFW_TESTS)
+  file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/tests/include/igl/opengl/glfw/*.cpp")
+  igl_add_test(igl_glfw ${SRC_FILES})
+endif()

cmake/igl/modules/imgui.cmake

@@ -0,0 +1,27 @@
+# 1. Define module
+igl_add_library(igl_imgui)
+
+# 2. Include headers
+include(GNUInstallDirs)
+target_include_directories(igl_imgui ${IGL_SCOPE}
+    $<BUILD_INTERFACE:${libigl_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+# 3. Target sources
+file(GLOB INC_FILES "${libigl_SOURCE_DIR}/include/igl/opengl/glfw/imgui/*.h")
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/include/igl/opengl/glfw/imgui/*.cpp")
+igl_target_sources(igl_imgui ${INC_FILES} ${SRC_FILES})
+
+# 4. Dependencies
+include(imgui)
+include(imguizmo)
+include(libigl_imgui_fonts)
+igl_include(glfw)
+target_link_libraries(igl_imgui ${IGL_SCOPE}
+    igl::core
+    igl::glfw
+    imgui::imgui
+    imguizmo::imguizmo
+    igl::imgui_fonts
+)

cmake/igl/modules/opengl.cmake

@@ -0,0 +1,24 @@
+# 1. Define module
+igl_add_library(igl_opengl)
+
+# 2. Include headers
+include(GNUInstallDirs)
+target_include_directories(igl_opengl ${IGL_SCOPE}
+    $<BUILD_INTERFACE:${libigl_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+# 3. Target sources
+file(GLOB INC_FILES "${libigl_SOURCE_DIR}/include/igl/opengl/*.h")
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/include/igl/opengl/*.cpp")
+igl_target_sources(igl_opengl ${INC_FILES} ${SRC_FILES})
+
+# 4. Dependencies
+include(glad)
+find_package(OpenGL REQUIRED OPTIONAL_COMPONENTS OpenGL)
+target_link_libraries(igl_opengl ${IGL_SCOPE}
+    igl::core
+    glad::glad
+    # Link against OpenGL::OpenGL if available, or fallback to OpenGL::GL
+    $<IF:$<TARGET_EXISTS:OpenGL::OpenGL>,OpenGL::OpenGL,OpenGL::GL>
+)

cmake/igl/modules/predicates.cmake

@@ -0,0 +1,25 @@
+# 1. Define module
+igl_add_library(igl_predicates)
+
+# 2. Include headers
+include(GNUInstallDirs)
+target_include_directories(igl_predicates ${IGL_SCOPE}
+    $<BUILD_INTERFACE:${libigl_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+# 3. Target sources
+file(GLOB INC_FILES "${libigl_SOURCE_DIR}/include/igl/predicates/*.h")
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/include/igl/predicates/*.cpp")
+igl_target_sources(igl_predicates ${INC_FILES} ${SRC_FILES})
+
+# 4. Dependencies
+include(predicates)
+target_link_libraries(igl_predicates ${IGL_SCOPE}
+    igl::core
+    predicates::predicates
+)
+
+# 5. Unit tests
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/tests/include/igl/predicates/*.cpp")
+igl_add_test(igl_predicates ${SRC_FILES})

cmake/igl/modules/restricted/matlab.cmake

@@ -0,0 +1,25 @@
+# 1. Define module
+igl_add_library(igl_restricted_matlab)
+
+# 2. Include headers
+include(GNUInstallDirs)
+target_include_directories(igl_restricted_matlab ${IGL_SCOPE}
+    $<BUILD_INTERFACE:${libigl_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+# 3. Target sources
+file(GLOB INC_FILES "${libigl_SOURCE_DIR}/include/igl/matlab/*.h")
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/include/igl/matlab/*.cpp")
+igl_target_sources(igl_restricted_matlab ${INC_FILES} ${SRC_FILES})
+
+# 4. Dependencies
+# MATLAB_ADDITIONAL_VERSIONS should have already been set in libigl/CMakeLists.txt
+find_package(Matlab REQUIRED COMPONENTS MEX_COMPILER MX_LIBRARY ENG_LIBRARY MAT_LIBRARY)
+# to-do detect if imported targets are available (cmake 3.22's findmatlab has
+# them)  and use those instead of hard coding these.
+target_link_libraries(igl_restricted_matlab ${IGL_SCOPE} igl::core ${Matlab_LIBRARIES})
+target_include_directories(igl_restricted_matlab ${IGL_SCOPE} ${Matlab_INCLUDE_DIRS})
+
+# 5. Unit tests
+# to-do write some matlab tests

cmake/igl/modules/restricted/mosek.cmake

@@ -0,0 +1,27 @@
+# 1. Define module
+igl_add_library(igl_restricted_mosek)
+
+# 2. Include headers
+include(GNUInstallDirs)
+target_include_directories(igl_restricted_mosek ${IGL_SCOPE}
+    $<BUILD_INTERFACE:${libigl_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+# 3. Target sources
+file(GLOB INC_FILES "${libigl_SOURCE_DIR}/include/igl/mosek/*.h")
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/include/igl/mosek/*.cpp")
+igl_target_sources(igl_restricted_mosek ${INC_FILES} ${SRC_FILES})
+
+# 4. Dependencies
+find_package(MOSEK REQUIRED)
+target_include_directories(igl_restricted_mosek ${IGL_SCOPE} ${MOSEK_INCLUDE_DIRS})
+target_link_libraries(igl_restricted_mosek ${IGL_SCOPE} igl::core ${MOSEK_LIBRARIES})
+
+# 5. Unit tests
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/tests/include/igl/mosek/*.cpp")
+igl_add_test(igl_restricted_mosek ${SRC_FILES})
+IF(APPLE)
+  INCLUDE(${libigl_SOURCE_DIR}/cmake/misc/OSXFixDylibReferences.cmake)
+  OSX_FIX_DYLIB_REFERENCES(test_igl_restricted_mosek "${MOSEK_LIBRARIES}")
+ENDIF()

cmake/igl/modules/restricted/triangle.cmake

@@ -0,0 +1,29 @@
+# 1. Define module
+igl_add_library(igl_restricted_triangle)
+
+# 2. Include headers
+include(GNUInstallDirs)
+target_include_directories(igl_restricted_triangle ${IGL_SCOPE}
+    $<BUILD_INTERFACE:${libigl_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+# 3. Target sources
+file(GLOB INC_FILES "${libigl_SOURCE_DIR}/include/igl/triangle/*.h")
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/include/igl/triangle/*.cpp")
+igl_target_sources(igl_restricted_triangle ${INC_FILES} ${SRC_FILES})
+
+# 4. Dependencies
+include(triangle)
+target_link_libraries(igl_restricted_triangle ${IGL_SCOPE}
+    igl::core
+    triangle::triangle
+)
+
+# 5. Unit tests
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/tests/include/igl/triangle/*.cpp")
+igl_add_test(igl_restricted_triangle ${SRC_FILES})
+if(TARGET test_igl_restricted_triangle)
+    igl_include(predicates)
+    target_link_libraries(test_igl_restricted_triangle PUBLIC igl::predicates)
+endif()

cmake/igl/modules/spectra.cmake

@@ -0,0 +1,25 @@
+# 1. Define module
+igl_add_library(igl_spectra)
+
+# 2. Include headers
+include(GNUInstallDirs)
+target_include_directories(igl_spectra ${IGL_SCOPE}
+    $<BUILD_INTERFACE:${libigl_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+# 3. Target sources
+file(GLOB INC_FILES "${libigl_SOURCE_DIR}/include/igl/spectra/*.h")
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/include/igl/spectra/*.cpp")
+igl_target_sources(igl_spectra ${INC_FILES} ${SRC_FILES})
+
+# 4. Dependencies
+include(spectra)
+target_link_libraries(igl_spectra ${IGL_SCOPE}
+    igl::core
+    spectra::spectra
+)
+
+# 5. Unit tests
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/tests/include/igl/spectra/*.cpp")
+igl_add_test(igl_spectra ${SRC_FILES})

cmake/igl/modules/stb.cmake

@@ -0,0 +1,35 @@
+# 1. Define module
+igl_add_library(igl_stb)
+
+# 2. Include headers
+include(GNUInstallDirs)
+target_include_directories(igl_stb ${IGL_SCOPE}
+    $<BUILD_INTERFACE:${libigl_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+# 3. Target sources
+file(GLOB INC_FILES "${libigl_SOURCE_DIR}/include/igl/stb/*.h")
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/include/igl/stb/*.cpp")
+if(LIBIGL_OPENGL)
+  message(STATUS "Including igl/opengl/stb support")
+  file(GLOB OPENGL_INC_FILES "${libigl_SOURCE_DIR}/include/igl/opengl/stb/*.h")
+  file(GLOB OPENGL_SRC_FILES "${libigl_SOURCE_DIR}/include/igl/opengl/stb/*.cpp")
+  list(APPEND INC_FILES ${OPENGL_INC_FILES})
+  list(APPEND SRC_FILES ${OPENGL_SRC_FILES})
+endif()
+igl_target_sources(igl_stb ${INC_FILES} ${SRC_FILES})
+
+# 4. Dependencies
+include(stb)
+target_link_libraries(igl_stb ${IGL_SCOPE}
+    igl::core
+    stb::stb
+)
+
+if(LIBIGL_OPENGL)
+  igl_include(opengl)
+  target_link_libraries(igl_stb ${IGL_SCOPE}
+      igl::opengl
+  )
+endif()

cmake/igl/modules/xml.cmake

@@ -0,0 +1,21 @@
+# 1. Define module
+igl_add_library(igl_xml)
+
+# 2. Include headers
+include(GNUInstallDirs)
+target_include_directories(igl_xml ${IGL_SCOPE}
+    $<BUILD_INTERFACE:${libigl_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+# 3. Target sources
+file(GLOB INC_FILES "${libigl_SOURCE_DIR}/include/igl/xml/*.h")
+file(GLOB SRC_FILES "${libigl_SOURCE_DIR}/include/igl/xml/*.cpp")
+igl_target_sources(igl_xml ${INC_FILES} ${SRC_FILES})
+
+# 4. Dependencies
+include(tinyxml2)
+target_link_libraries(igl_xml ${IGL_SCOPE}
+    igl::core
+    tinyxml2::tinyxml2
+)

cmake/libigl-cgal.yml

@@ -1,8 +0,0 @@
-# This is a conda environment that can be used to compile libigl with CGAL on Windows
-# Only boost is required to be installed on the system, CGAL is automatically downloaded
-# by CMake and is built with libigl.
-name: libigl-cgal
-channels:
-  - conda-forge
-dependencies:
-  - boost-cpp=1.65.0

cmake/libigl-config.cmake.in

@@ -1,31 +0,0 @@
-@PACKAGE_INIT@
-
-include(${CMAKE_CURRENT_LIST_DIR}/libigl-export.cmake)
-
-# Check if Eigen3 target is avaiable, if not try to locate it
-# with find_package.
-message(STATUS "[libigl] Looking for Eigen3")
-if (NOT TARGET Eigen3::Eigen)
-  # Try if Eigen3 can be found with find_package
-  find_package(Eigen3 CONFIG REQUIRED)
-endif()
-
-
-if (TARGET igl::core)
-  if (TARGET Eigen3::Eigen)
-    # Inject dependency
-    set_target_properties(igl::core PROPERTIES INTERFACE_LINK_LIBRARIES Eigen3::Eigen)
-    set(libigl_core_FOUND TRUE)
-  endif()
-endif()
-
-if (TARGET igl::common)
-  if (TARGET Eigen3::Eigen)
-    # Inject dependency
-    set_target_properties(igl::common PROPERTIES INTERFACE_LINK_LIBRARIES Eigen3::Eigen)
-    set(libigl_common_FOUND TRUE)
-  endif()
-endif()
-
-check_required_components(libigl)
-

cmake/libigl.cmake

@@ -1,570 +1,33 @@
-cmake_minimum_required(VERSION 3.1)
-
-# https://github.com/libigl/libigl/issues/751
-# http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20160425/351643.html
-if(APPLE)
-  if(NOT CMAKE_LIBTOOL)
-    find_program(CMAKE_LIBTOOL NAMES libtool)
-  endif()
-  if(CMAKE_LIBTOOL)
-    set(CMAKE_LIBTOOL ${CMAKE_LIBTOOL} CACHE PATH "libtool executable")
-    message(STATUS "Found libtool - ${CMAKE_LIBTOOL}")
-    get_property(languages GLOBAL PROPERTY ENABLED_LANGUAGES)
-    foreach(lang ${languages})
-      # Added -c
-      set(CMAKE_${lang}_CREATE_STATIC_LIBRARY
-        "${CMAKE_LIBTOOL} -c -static -o <TARGET> <LINK_FLAGS> <OBJECTS> ")
-    endforeach()
-  endif()
+# Sanity check for backward compatibility
+get_filename_component(PATH_X "${libigl_SOURCE_DIR}" REALPATH)
+get_filename_component(PATH_Y "${CMAKE_CURRENT_LIST_DIR}/.." REALPATH)
+if(NOT PATH_X STREQUAL PATH_Y)
+    message(FATAL_ERROR "You included libigl.cmake directly from your own project. This behavior "
+                        "is not supported anymore. Please add libigl to your project via "
+                        "add_subdirectory(<path_to_libigl>). See the libigl example project for "
+                        "more information: https://github.com/libigl/libigl-example-project/")
 endif()
 
-### Available options ###
-option(LIBIGL_USE_STATIC_LIBRARY     "Use libigl as static library" OFF)
-option(LIBIGL_WITH_CGAL              "Use CGAL"                     OFF)
-option(LIBIGL_WITH_COMISO            "Use CoMiso"                   OFF)
-option(LIBIGL_WITH_CORK              "Use Cork"                     OFF)
-option(LIBIGL_WITH_EMBREE            "Use Embree"                   OFF)
-option(LIBIGL_WITH_MATLAB            "Use Matlab"                   OFF)
-option(LIBIGL_WITH_MOSEK             "Use MOSEK"                    OFF)
-option(LIBIGL_WITH_OPENGL            "Use OpenGL"                   OFF)
-option(LIBIGL_WITH_OPENGL_GLFW       "Use GLFW"                     OFF)
-option(LIBIGL_WITH_OPENGL_GLFW_IMGUI "Use ImGui"                    OFF)
-option(LIBIGL_WITH_PNG               "Use PNG"                      OFF)
-option(LIBIGL_WITH_TETGEN            "Use Tetgen"                   OFF)
-option(LIBIGL_WITH_TRIANGLE          "Use Triangle"                 OFF)
-option(LIBIGL_WITH_PREDICATES        "Use exact predicates"         OFF)
-option(LIBIGL_WITH_XML               "Use XML"                      OFF)
-option(LIBIGL_WITHOUT_COPYLEFT       "Disable Copyleft libraries"   OFF)
-option(LIBIGL_EXPORT_TARGETS         "Export libigl CMake targets"  OFF)
-
-if(LIBIGL_BUILD_PYTHON)
-  message(FATAL_ERROR "Python bindings have been removed in this version. Please use an older version of libigl, or wait for the new bindings to be released.")
-endif()
-
-################################################################################
-
-### Configuration
-set(LIBIGL_ROOT "${CMAKE_CURRENT_LIST_DIR}/..")
-set(LIBIGL_SOURCE_DIR "${LIBIGL_ROOT}/include")
-set(LIBIGL_EXTERNAL "${LIBIGL_ROOT}/external")
-
-# Dependencies are linked as INTERFACE targets unless libigl is compiled as a static library
-if(LIBIGL_USE_STATIC_LIBRARY)
-  set(IGL_SCOPE PUBLIC)
-else()
-  set(IGL_SCOPE INTERFACE)
-endif()
-
-# Download and update 3rdparty libraries
-list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR})
-include(LibiglDownloadExternal)
-
-# Provides igl_set_folders() to set folders for Visual Studio/Xcode
-include(LibiglFolders)
-
-################################################################################
-### IGL Common
-################################################################################
-
-add_library(igl_common INTERFACE)
-target_include_directories(igl_common SYSTEM INTERFACE
-  $<BUILD_INTERFACE:${LIBIGL_SOURCE_DIR}>
-  $<INSTALL_INTERFACE:include>
-)
-# Export igl_common as igl::common
-set_property(TARGET igl_common PROPERTY EXPORT_NAME igl::common)
-if(LIBIGL_USE_STATIC_LIBRARY)
-  target_compile_definitions(igl_common INTERFACE -DIGL_STATIC_LIBRARY)
-endif()
-
-# Transitive C++11 flags
-include(CXXFeatures)
-target_compile_features(igl_common INTERFACE ${CXX11_FEATURES})
-
-# Other compilation flags
-if(MSVC)
-  # Enable parallel compilation for Visual Studio
-  target_compile_options(igl_common INTERFACE /MP /bigobj)
-  target_compile_definitions(igl_common INTERFACE -DNOMINMAX)
-endif()
-
-# Controls whether to use the static MSVC runtime or not
-include(LibiglWindows)
-
-if(BUILD_SHARED_LIBS)
-  # Generate position independent code
-  set_target_properties(igl_common PROPERTIES INTERFACE_POSITION_INDEPENDENT_CODE ON)
-endif()
-
-if(UNIX AND NOT HUNTER_ENABLED)
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
-  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
-endif()
-
-if(HUNTER_ENABLED)
-  hunter_add_package(Eigen)
-  find_package(Eigen3 CONFIG REQUIRED)
-endif()
-
-# Eigen
-if(NOT TARGET Eigen3::Eigen)
-  igl_download_eigen()
-  add_library(igl_eigen INTERFACE)
-  target_include_directories(igl_eigen SYSTEM INTERFACE
-    $<BUILD_INTERFACE:${LIBIGL_EXTERNAL}/eigen>
-    $<INSTALL_INTERFACE:include>
-  )
-  set_property(TARGET igl_eigen PROPERTY EXPORT_NAME Eigen3::Eigen)
-  add_library(Eigen3::Eigen ALIAS igl_eigen)
-endif()
-target_link_libraries(igl_common INTERFACE Eigen3::Eigen)
-
-# C++11 Thread library
-find_package(Threads REQUIRED)
-target_link_libraries(igl_common INTERFACE ${CMAKE_THREAD_LIBS_INIT})
-
-################################################################################
-
-## CGAL dependencies on Windows: GMP & MPFR
-function(igl_download_cgal_deps)
-  if(WIN32)
-    igl_download_project(gmp
-        URL     https://cgal.geometryfactory.com/CGAL/precompiled_libs/auxiliary/x64/GMP/5.0.1/gmp-all-CGAL-3.9.zip
-        URL_MD5 508c1292319c832609329116a8234c9f
-    )
-    igl_download_project(mpfr
-        URL https://cgal.geometryfactory.com/CGAL/precompiled_libs/auxiliary/x64/MPFR/3.0.0/mpfr-all-CGAL-3.9.zip
-        URL_MD5 48840454eef0ff18730050c05028734b
-    )
-    set(ENV{GMP_DIR} "${LIBIGL_EXTERNAL}/gmp")
-    set(ENV{MPFR_DIR} "${LIBIGL_EXTERNAL}/mpfr")
-  endif()
-endfunction()
-
-################################################################################
-
-function(compile_igl_module module_dir)
-  string(REPLACE "/" "_" module_name "${module_dir}")
-  if(module_name STREQUAL "core")
-    set(module_libname "igl")
-  else()
-    set(module_libname "igl_${module_name}")
-  endif()
-  if(LIBIGL_USE_STATIC_LIBRARY)
-    file(GLOB SOURCES_IGL_${module_name}
-      "${LIBIGL_SOURCE_DIR}/igl/${module_dir}/*.cpp"
-      "${LIBIGL_SOURCE_DIR}/igl/${module_dir}/*.h*"
-    )
-    if(NOT LIBIGL_WITHOUT_COPYLEFT)
-      file(GLOB COPYLEFT_SOURCES_IGL_${module_name}
-        "${LIBIGL_SOURCE_DIR}/igl/copyleft/${module_dir}/*.cpp"
-        "${LIBIGL_SOURCE_DIR}/igl/copyleft/${module_dir}/*.h*"
-      )
-      list(APPEND SOURCES_IGL_${module_name} ${COPYLEFT_SOURCES_IGL_${module_name}})
-    endif()
-    add_library(${module_libname} STATIC ${SOURCES_IGL_${module_name}} ${ARGN})
-    if(MSVC)
-      # Silencing some compile warnings
-      target_compile_options(${module_libname} PRIVATE
-        # Type conversion warnings. These can be fixed with some effort and possibly more verbose code.
-        /wd4267 # conversion from 'size_t' to 'type', possible loss of data
-        /wd4244 # conversion from 'type1' to 'type2', possible loss of data
-        /wd4018 # signed/unsigned mismatch
-        /wd4305 # truncation from 'double' to 'float'
-        # This one is from template instantiations generated by autoexplicit.sh:
-        /wd4667 # no function template defined that matches forced instantiation ()
-        # This one is easy to fix, just need to switch to safe version of C functions
-        /wd4996 # this function or variable may be unsafe
-        # This one is when using bools in adjacency matrices
-        /wd4804 #'+=': unsafe use of type 'bool' in operation
-      )
-    endif()
-  else()
-    add_library(${module_libname} INTERFACE)
-  endif()
-
-  target_link_libraries(${module_libname} ${IGL_SCOPE} igl_common)
-  if(NOT module_name STREQUAL "core")
-    target_link_libraries(${module_libname} ${IGL_SCOPE} igl)
-  endif()
-
-  # Alias target because it looks nicer
-  message(STATUS "Creating target: igl::${module_name} (${module_libname})")
-  add_library(igl::${module_name} ALIAS ${module_libname})
-  # Export as igl::${module_name}
-  set_property(TARGET ${module_libname} PROPERTY EXPORT_NAME igl::${module_name})
-endfunction()
-
-################################################################################
-### IGL Core
-################################################################################
-
-if(LIBIGL_USE_STATIC_LIBRARY)
-  file(GLOB SOURCES_IGL
-    "${LIBIGL_SOURCE_DIR}/igl/*.cpp"
-    "${LIBIGL_SOURCE_DIR}/igl/*.h*"
-    "${LIBIGL_SOURCE_DIR}/igl/copyleft/*.cpp"
-    "${LIBIGL_SOURCE_DIR}/igl/copyleft/*.h*"
-  )
-endif()
-compile_igl_module("core" ${SOURCES_IGL})
-
-################################################################################
-### Download the python part ###
-if(LIBIGL_WITH_PYTHON)
-endif()
-
-################################################################################
-### Compile the CGAL part ###
-if(LIBIGL_WITH_CGAL)
-  # Try to find the CGAL library
-  # CGAL Core is needed for
-  # `Exact_predicates_exact_constructions_kernel_with_sqrt`
-  if(NOT TARGET CGAL::CGAL)
-    set(CGAL_DIR "${LIBIGL_EXTERNAL}/cgal")
-    igl_download_cgal()
-    igl_download_cgal_deps()
-    message("BOOST_ROOT: ${BOOST_ROOT}")
-    if(EXISTS ${LIBIGL_EXTERNAL}/boost)
-      set(BOOST_ROOT "${LIBIGL_EXTERNAL}/boost")
-    endif()
-    option(CGAL_Boost_USE_STATIC_LIBS "Use static Boost libs with CGAL" ON)
-
-    find_package(CGAL CONFIG COMPONENTS Core PATHS ${CGAL_DIR} NO_DEFAULT_PATH)
-  endif()
-
-  # If CGAL has been found, then build the libigl module
-  if(TARGET CGAL::CGAL AND TARGET CGAL::CGAL_Core)
-    compile_igl_module("cgal")
-    target_link_libraries(igl_cgal ${IGL_SCOPE} CGAL::CGAL CGAL::CGAL_Core)
-  else()
-    message(FATAL_ERROR "Could not define CGAL::CGAL and CGAL::CGAL_Core.")
-  endif()
-endif()
-
-# Helper function for `igl_copy_cgal_dll()`
-function(igl_copy_imported_dll src_target dst_target)
-  get_target_property(other_libs ${src_target} INTERFACE_LINK_LIBRARIES)
-  set(locations)
-  list(APPEND locations ${main_lib} ${other_libs})
-  foreach(location ${locations})
-    string(REGEX MATCH "^(.*)\\.[^.]*$" dummy ${location})
-    set(location "${CMAKE_MATCH_1}.dll")
-    if(EXISTS "${location}" AND location MATCHES "^.*\\.dll$")
-      add_custom_command(TARGET ${dst_target} POST_BUILD COMMAND ${CMAKE_COMMAND} -E copy_if_different "${location}" $<TARGET_FILE_DIR:${dst_target}>)
-    endif()
-  endforeach()
-endfunction()
-
-# Convenient functions to copy CGAL dlls into a target (executable) destination folder (for Windows)
-function(igl_copy_cgal_dll target)
-  if(WIN32 AND LIBIGL_WITH_CGAL)
-    igl_copy_imported_dll(CGAL::CGAL ${target})
-    igl_copy_imported_dll(CGAL::CGAL_Core ${target})
-  endif()
-endfunction()
-
-################################################################################
-### Compile the CoMISo part ###
-# NOTE: this cmakefile works only with the
-# comiso available here: https://github.com/libigl/CoMISo
-if(LIBIGL_WITH_COMISO)
-  compile_igl_module("comiso")
-  if(NOT TARGET CoMISo)
-    igl_download_comiso()
-    add_subdirectory("${LIBIGL_EXTERNAL}/CoMISo" CoMISo)
-  endif()
-  target_link_libraries(igl_comiso ${IGL_SCOPE} CoMISo)
-endif()
-
-################################################################################
-### Compile the cork part ###
-if(LIBIGL_WITH_CORK)
-  set(CORK_DIR "${LIBIGL_EXTERNAL}/cork")
-  if(NOT TARGET cork)
-    # call this "lib-cork" instead of "cork", otherwise cmake gets confused about
-    # "cork" executable
-    igl_download_cork()
-    add_subdirectory("${CORK_DIR}" "lib-cork")
-  endif()
-  compile_igl_module("cork")
-  target_include_directories(igl_cork ${IGL_SCOPE} cork)
-  target_include_directories(igl_cork ${IGL_SCOPE} "${CORK_DIR}/src")
-  target_link_libraries(igl_cork ${IGL_SCOPE} cork)
-endif()
-
-################################################################################
-### Compile the embree part ###
-if(LIBIGL_WITH_EMBREE)
-  set(EMBREE_DIR "${LIBIGL_EXTERNAL}/embree")
-
-  if(NOT TARGET embree)
-    igl_download_embree()
-
-    set(EMBREE_TESTING_INTENSITY 0 CACHE STRING "")
-    set(EMBREE_ISPC_SUPPORT OFF CACHE BOOL " ")
-    set(EMBREE_TASKING_SYSTEM "INTERNAL" CACHE BOOL " ")
-    set(EMBREE_TUTORIALS OFF CACHE BOOL " ")
-    set(EMBREE_MAX_ISA "SSE2" CACHE STRING " ")
-    set(EMBREE_STATIC_LIB ON CACHE BOOL " ")
-    if(MSVC)
-      set(EMBREE_STATIC_RUNTIME ${IGL_STATIC_RUNTIME} CACHE BOOL "Use the static version of the C/C++ runtime library.")
-    endif()
-
-    add_subdirectory("${EMBREE_DIR}" "embree" EXCLUDE_FROM_ALL)
-  endif()
-
-  compile_igl_module("embree")
-  target_link_libraries(igl_embree ${IGL_SCOPE} embree)
-  target_include_directories(igl_embree ${IGL_SCOPE} ${EMBREE_DIR}/include)
-  target_compile_definitions(igl_embree ${IGL_SCOPE} -DEMBREE_STATIC_LIB)
-endif()
-
-################################################################################
-### Compile the matlab part ###
-if(LIBIGL_WITH_MATLAB)
-  find_package(Matlab REQUIRED COMPONENTS MEX_COMPILER MX_LIBRARY ENG_LIBRARY MAT_LIBRARY)
-  compile_igl_module("matlab")
-  target_link_libraries(igl_matlab ${IGL_SCOPE} ${Matlab_LIBRARIES})
-  target_include_directories(igl_matlab ${IGL_SCOPE} ${Matlab_INCLUDE_DIRS})
-endif()
-
-################################################################################
-### Compile the mosek part ###
-if(LIBIGL_WITH_MOSEK)
-  find_package(MOSEK REQUIRED)
-  compile_igl_module("mosek")
-  target_link_libraries(igl_mosek ${IGL_SCOPE} ${MOSEK_LIBRARIES})
-  target_include_directories(igl_mosek ${IGL_SCOPE} ${MOSEK_INCLUDE_DIRS})
-  target_compile_definitions(igl_mosek ${IGL_SCOPE} -DLIBIGL_WITH_MOSEK)
-endif()
-
-################################################################################
-### Compile the opengl part ###
-if(LIBIGL_WITH_OPENGL)
-  # OpenGL module
-  compile_igl_module("opengl")
-
-  # OpenGL library
-  if (NOT CMAKE_VERSION VERSION_LESS "3.11")
-    cmake_policy(SET CMP0072 NEW)
-  endif()
-  find_package(OpenGL REQUIRED)
-  if(TARGET OpenGL::GL)
-    target_link_libraries(igl_opengl ${IGL_SCOPE} OpenGL::GL)
-  else()
-    target_link_libraries(igl_opengl ${IGL_SCOPE} ${OPENGL_gl_LIBRARY})
-    target_include_directories(igl_opengl SYSTEM ${IGL_SCOPE} ${OPENGL_INCLUDE_DIR})
-  endif()
-
-  # glad module
-  if(NOT TARGET glad)
-    igl_download_glad()
-    add_subdirectory(${LIBIGL_EXTERNAL}/glad glad)
-  endif()
-  target_link_libraries(igl_opengl ${IGL_SCOPE} glad)
-endif()
-
-################################################################################
-### Compile the GLFW part ###
-if(LIBIGL_WITH_OPENGL_GLFW)
-  if(TARGET igl::opengl)
-    # GLFW module
-    compile_igl_module("opengl/glfw")
-    if(NOT TARGET glfw)
-      igl_download_glfw()
-      option(GLFW_BUILD_EXAMPLES "Build the GLFW example programs" OFF)
-      option(GLFW_BUILD_TESTS "Build the GLFW test programs" OFF)
-      option(GLFW_BUILD_DOCS "Build the GLFW documentation" OFF)
-      option(GLFW_INSTALL "Generate installation target" OFF)
-      if(IGL_STATIC_RUNTIME)
-        set(USE_MSVC_RUNTIME_LIBRARY_DLL OFF CACHE BOOL "Use MSVC runtime library DLL" FORCE)
-      else()
-        set(USE_MSVC_RUNTIME_LIBRARY_DLL ON CACHE BOOL "Use MSVC runtime library DLL" FORCE)
-      endif()
-      add_subdirectory(${LIBIGL_EXTERNAL}/glfw glfw)
-    endif()
-    target_link_libraries(igl_opengl_glfw ${IGL_SCOPE} igl_opengl glfw)
-  endif()
-endif()
-
-################################################################################
-### Compile the ImGui part ###
-if(LIBIGL_WITH_OPENGL_GLFW_IMGUI)
-  if(TARGET igl::opengl_glfw)
-    # ImGui module
-    compile_igl_module("opengl/glfw/imgui")
-    if(NOT TARGET imgui)
-      igl_download_imgui()
-      add_subdirectory(${LIBIGL_EXTERNAL}/libigl-imgui imgui)
-    endif()
-    target_link_libraries(igl_opengl_glfw_imgui ${IGL_SCOPE} igl_opengl_glfw imgui)
-  endif()
-endif()
-
-################################################################################
-### Compile the png part ###
-if(LIBIGL_WITH_PNG)
-  # png/ module is anomalous because it also depends on opengl it really should
-  # be moved into the opengl/ directory and namespace ...
-  if(TARGET igl_opengl)
-    if(NOT TARGET stb_image)
-      igl_download_stb()
-      add_subdirectory(${LIBIGL_EXTERNAL}/stb stb_image)
-    endif()
-    compile_igl_module("png" "")
-    target_link_libraries(igl_png ${IGL_SCOPE} igl_stb_image igl_opengl)
-  endif()
-endif()
-
-################################################################################
-### Compile the tetgen part ###
-if(LIBIGL_WITH_TETGEN)
-  set(TETGEN_DIR "${LIBIGL_EXTERNAL}/tetgen")
-  if(NOT TARGET tetgen)
-    igl_download_tetgen()
-    add_subdirectory("${TETGEN_DIR}" "tetgen")
-  endif()
-  compile_igl_module("tetgen")
-  target_link_libraries(igl_tetgen ${IGL_SCOPE} tetgen)
-  target_include_directories(igl_tetgen ${IGL_SCOPE} ${TETGEN_DIR})
-endif()
-
-################################################################################
-### Compile the triangle part ###
-if(LIBIGL_WITH_TRIANGLE)
-  set(TRIANGLE_DIR "${LIBIGL_EXTERNAL}/triangle")
-  if(NOT TARGET triangle)
-    igl_download_triangle()
-    add_subdirectory("${TRIANGLE_DIR}" "triangle")
-  endif()
-  compile_igl_module("triangle")
-  target_link_libraries(igl_triangle ${IGL_SCOPE} triangle)
-  target_include_directories(igl_triangle ${IGL_SCOPE} ${TRIANGLE_DIR})
-endif()
-
-################################################################################
-### Compile the predicates part ###
-if(LIBIGL_WITH_PREDICATES)
-  set(PREDICATES_DIR "${LIBIGL_EXTERNAL}/predicates")
-  if(NOT TARGET predicates)
-    igl_download_predicates()
-    add_subdirectory("${PREDICATES_DIR}" "predicates")
-  endif()
-  compile_igl_module("predicates")
-  target_link_libraries(igl_predicates ${IGL_SCOPE} predicates)
-  target_include_directories(igl_predicates ${IGL_SCOPE} ${PREDICATES_DIR})
-  target_compile_definitions(igl_predicates ${IGL_SCOPE} -DLIBIGL_WITH_PREDICATES)
-endif()
-
-################################################################################
-### Compile the xml part ###
-if(LIBIGL_WITH_XML)
-  set(TINYXML2_DIR "${LIBIGL_EXTERNAL}/tinyxml2")
-  if(NOT TARGET tinyxml2)
-    igl_download_tinyxml2()
-    add_library(tinyxml2 STATIC ${TINYXML2_DIR}/tinyxml2.cpp ${TINYXML2_DIR}/tinyxml2.h)
-    target_include_directories(tinyxml2 PUBLIC ${TINYXML2_DIR})
-    set_target_properties(tinyxml2 PROPERTIES
-            COMPILE_DEFINITIONS "TINYXML2_EXPORT"
-            VERSION "3.0.0"
-            SOVERSION "3")
-  endif()
-  compile_igl_module("xml")
-  target_link_libraries(igl_xml ${IGL_SCOPE} tinyxml2)
-  target_include_directories(igl_xml ${IGL_SCOPE} ${TINYXML2_DIR})
-endif()
-
-################################################################################
-### Install and export all modules
-
-if(NOT LIBIGL_EXPORT_TARGETS)
-  return()
-endif()
-
-function(install_dir_files dir_name)
-  if (dir_name STREQUAL "core")
-    set(subpath "")
-  else()
-    set(subpath "/${dir_name}")
-  endif()
-
-  file(GLOB public_headers
-    ${CMAKE_CURRENT_SOURCE_DIR}/include/igl${subpath}/*.h
-    ${CMAKE_CURRENT_SOURCE_DIR}/include/igl${subpath}/*.hpp
-  )
-
-  set(files_to_install ${public_headers})
-
-  if(NOT LIBIGL_USE_STATIC_LIBRARY)
-    file(GLOB public_sources
-      ${CMAKE_CURRENT_SOURCE_DIR}/include/igl${subpath}/*.cpp
-      ${CMAKE_CURRENT_SOURCE_DIR}/include/igl${subpath}/*.c
-    )
-  endif()
-  list(APPEND files_to_install ${public_sources})
-
-  install(
-    FILES ${files_to_install}
-    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/igl${subpath}
-  )
-endfunction()
-
-################################################################################
-
-include(GNUInstallDirs)
-include(CMakePackageConfigHelpers)
-
-if(TARGET igl_eigen)
-  set(IGL_EIGEN igl_eigen)
-else()
-  set(IGL_EIGEN)
-  message(WARNING "Trying to export igl targets while using an imported target for Eigen.")
-endif()
-
-# Install and export core library
-install(
-  TARGETS
-    igl
-    igl_common
-    ${IGL_EIGEN}
-  EXPORT igl-export
-  PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
-  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
-  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-)
-export(
-  TARGETS
-    igl
-    igl_common
-    ${IGL_EIGEN}
-  FILE libigl-export.cmake
-)
-
-# Install headers for core library
-install_dir_files(core)
-install_dir_files(copyleft)
-
-# Write package configuration file
-configure_package_config_file(
-  ${CMAKE_CURRENT_LIST_DIR}/libigl-config.cmake.in
-  ${CMAKE_BINARY_DIR}/libigl-config.cmake
-  INSTALL_DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/libigl/cmake
-)
-install(
-  FILES
-    ${CMAKE_BINARY_DIR}/libigl-config.cmake
-  DESTINATION
-    ${CMAKE_INSTALL_DATADIR}/libigl/cmake
-)
-
-# Write export file
-export(EXPORT igl-export
-  FILE "${CMAKE_BINARY_DIR}/libigl-export.cmake"
-)
-install(EXPORT igl-export DESTINATION ${CMAKE_INSTALL_DATADIR}/libigl/cmake FILE libigl-export.cmake)
-
-
-export(PACKAGE libigl)
-
+# Global options
+include(igl_windows)
+
+# Libigl permissive modules
+igl_include(core)
+igl_include_optional(embree)
+igl_include_optional(opengl)
+igl_include_optional(glfw)
+igl_include_optional(imgui)
+igl_include_optional(predicates)
+igl_include_optional(stb)
+igl_include_optional(spectra)
+igl_include_optional(xml)
+
+# Libigl copyleft modules
+igl_include_optional(copyleft core)
+igl_include_optional(copyleft cgal)
+igl_include_optional(copyleft tetgen)
+
+# Libigl restricted modules
+igl_include_optional(restricted matlab)
+igl_include_optional(restricted mosek)
+igl_include_optional(restricted triangle)

cmake/misc/HunterGate.cmake

@@ -1,4 +1,4 @@
-# Copyright (c) 2013-2018, Ruslan Baratov
+# Copyright (c) 2013-2019, Ruslan Baratov
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -59,8 +59,9 @@ include(CMakeParseArguments) # cmake_parse_arguments
 option(HUNTER_STATUS_PRINT "Print working status" ON)
 option(HUNTER_STATUS_DEBUG "Print a lot info" OFF)
 option(HUNTER_TLS_VERIFY "Enable/disable TLS certificate checking on downloads" ON)
+set(HUNTER_ROOT "" CACHE FILEPATH "Override the HUNTER_ROOT.")
 
-set(HUNTER_WIKI "https://github.com/ruslo/hunter/wiki")
+set(HUNTER_ERROR_PAGE "https://hunter.readthedocs.io/en/latest/reference/errors")
 
 function(hunter_gate_status_print)
   if(HUNTER_STATUS_PRINT OR HUNTER_STATUS_DEBUG)
@@ -79,9 +80,9 @@ function(hunter_gate_status_debug)
   endif()
 endfunction()
 
-function(hunter_gate_wiki wiki_page)
-  message("------------------------------ WIKI -------------------------------")
-  message("    ${HUNTER_WIKI}/${wiki_page}")
+function(hunter_gate_error_page error_page)
+  message("------------------------------ ERROR ------------------------------")
+  message("    ${HUNTER_ERROR_PAGE}/${error_page}.html")
   message("-------------------------------------------------------------------")
   message("")
   message(FATAL_ERROR "")
@@ -94,14 +95,13 @@ function(hunter_gate_internal_error)
   endforeach()
   message("[hunter ** INTERNAL **] [Directory:${CMAKE_CURRENT_LIST_DIR}]")
   message("")
-  hunter_gate_wiki("error.internal")
+  hunter_gate_error_page("error.internal")
 endfunction()
 
 function(hunter_gate_fatal_error)
-  cmake_parse_arguments(hunter "" "WIKI" "" "${ARGV}")
-  string(COMPARE EQUAL "${hunter_WIKI}" "" have_no_wiki)
-  if(have_no_wiki)
-    hunter_gate_internal_error("Expected wiki")
+  cmake_parse_arguments(hunter "" "ERROR_PAGE" "" "${ARGV}")
+  if("${hunter_ERROR_PAGE}" STREQUAL "")
+    hunter_gate_internal_error("Expected ERROR_PAGE")
   endif()
   message("")
   foreach(x ${hunter_UNPARSED_ARGUMENTS})
@@ -109,11 +109,11 @@ function(hunter_gate_fatal_error)
   endforeach()
   message("[hunter ** FATAL ERROR **] [Directory:${CMAKE_CURRENT_LIST_DIR}]")
   message("")
-  hunter_gate_wiki("${hunter_WIKI}")
+  hunter_gate_error_page("${hunter_ERROR_PAGE}")
 endfunction()
 
 function(hunter_gate_user_error)
-  hunter_gate_fatal_error(${ARGV} WIKI "error.incorrect.input.data")
+  hunter_gate_fatal_error(${ARGV} ERROR_PAGE "error.incorrect.input.data")
 endfunction()
 
 function(hunter_gate_self root version sha1 result)
@@ -149,24 +149,21 @@ endfunction()
 # Set HUNTER_GATE_ROOT cmake variable to suitable value.
 function(hunter_gate_detect_root)
   # Check CMake variable
-  string(COMPARE NOTEQUAL "${HUNTER_ROOT}" "" not_empty)
-  if(not_empty)
+  if(HUNTER_ROOT)
     set(HUNTER_GATE_ROOT "${HUNTER_ROOT}" PARENT_SCOPE)
     hunter_gate_status_debug("HUNTER_ROOT detected by cmake variable")
     return()
   endif()
 
   # Check environment variable
-  string(COMPARE NOTEQUAL "$ENV{HUNTER_ROOT}" "" not_empty)
-  if(not_empty)
+  if(DEFINED ENV{HUNTER_ROOT})
     set(HUNTER_GATE_ROOT "$ENV{HUNTER_ROOT}" PARENT_SCOPE)
     hunter_gate_status_debug("HUNTER_ROOT detected by environment variable")
     return()
   endif()
 
   # Check HOME environment variable
-  string(COMPARE NOTEQUAL "$ENV{HOME}" "" result)
-  if(result)
+  if(DEFINED ENV{HOME})
     set(HUNTER_GATE_ROOT "$ENV{HOME}/.hunter" PARENT_SCOPE)
     hunter_gate_status_debug("HUNTER_ROOT set using HOME environment variable")
     return()
@@ -174,8 +171,7 @@ function(hunter_gate_detect_root)
 
   # Check SYSTEMDRIVE and USERPROFILE environment variable (windows only)
   if(WIN32)
-    string(COMPARE NOTEQUAL "$ENV{SYSTEMDRIVE}" "" result)
-    if(result)
+    if(DEFINED ENV{SYSTEMDRIVE})
       set(HUNTER_GATE_ROOT "$ENV{SYSTEMDRIVE}/.hunter" PARENT_SCOPE)
       hunter_gate_status_debug(
           "HUNTER_ROOT set using SYSTEMDRIVE environment variable"
@@ -183,8 +179,7 @@ function(hunter_gate_detect_root)
       return()
     endif()
 
-    string(COMPARE NOTEQUAL "$ENV{USERPROFILE}" "" result)
-    if(result)
+    if(DEFINED ENV{USERPROFILE})
       set(HUNTER_GATE_ROOT "$ENV{USERPROFILE}/.hunter" PARENT_SCOPE)
       hunter_gate_status_debug(
           "HUNTER_ROOT set using USERPROFILE environment variable"
@@ -195,7 +190,7 @@ function(hunter_gate_detect_root)
 
   hunter_gate_fatal_error(
       "Can't detect HUNTER_ROOT"
-      WIKI "error.detect.hunter.root"
+      ERROR_PAGE "error.detect.hunter.root"
   )
 endfunction()
 
@@ -214,7 +209,7 @@ function(hunter_gate_download dir)
         "Settings:"
         "  HUNTER_ROOT: ${HUNTER_GATE_ROOT}"
         "  HUNTER_SHA1: ${HUNTER_GATE_SHA1}"
-        WIKI "error.run.install"
+        ERROR_PAGE "error.run.install"
     )
   endif()
   string(COMPARE EQUAL "${dir}" "" is_bad)
@@ -400,7 +395,7 @@ macro(HunterGate)
       hunter_gate_fatal_error(
           "Please set HunterGate *before* 'project' command. "
           "Detected project: ${PROJECT_NAME}"
-          WIKI "error.huntergate.before.project"
+          ERROR_PAGE "error.huntergate.before.project"
       )
     endif()
 
@@ -470,7 +465,7 @@ macro(HunterGate)
             "HUNTER_ROOT (${HUNTER_GATE_ROOT}) contains spaces."
             "Set HUNTER_ALLOW_SPACES_IN_PATH=ON to skip this error"
             "(Use at your own risk!)"
-            WIKI "error.spaces.in.hunter.root"
+            ERROR_PAGE "error.spaces.in.hunter.root"
         )
       endif()
     endif()
@@ -518,7 +513,9 @@ macro(HunterGate)
         hunter_gate_internal_error("${_sha1_location} not found")
       endif()
       file(READ "${_sha1_location}" _sha1_value)
-      string(COMPARE EQUAL "${_sha1_value}" "${HUNTER_GATE_SHA1}" _is_equal)
+      string(TOLOWER "${_sha1_value}" _sha1_value_lower)
+      string(TOLOWER "${HUNTER_GATE_SHA1}" _HUNTER_GATE_SHA1_lower)
+      string(COMPARE EQUAL "${_sha1_value_lower}" "${_HUNTER_GATE_SHA1_lower}" _is_equal)
       if(NOT _is_equal)
         hunter_gate_internal_error(
             "Short SHA1 collision:"

cmake/misc/OSXFixDylibReferences.cmake

@@ -0,0 +1,151 @@
+# OS X requires a Mach-O dynamic library to have a baked "install name", that is used by other modules to link to it. Depending
+# on how the library is built, the install name is not always an absolute path, nor necessarily the same as the name of the
+# library file itself. This macro takes as input the name of a target, and a list of libraries that it links to (the output of
+# FIND_PACKAGE or FIND_LIBRARY calls), and generates a set of custom, post-build commands that, for each linked dylib, changes
+# the name the target uses to refer to it with a fully-qualified (absolute) version of the library's own install name. This
+# helps ensure that the target can be used from any location while still being able to locate the linked dynamic libraries.
+#
+# Note that this script does NOT handle the case when a linked library itself refers to another library using a non-absolute
+# name (Boost is a notorious example). To avoid such issues, it is recommended to use a static library instead of a shared one
+# in a non-standard location. Alternatively, set DYLD_LIBRARY_PATH to include these non-standard locations when running the
+# program (not recommended).
+#
+# Author: Siddhartha Chaudhuri, 2009.
+#
+
+# Set the minimum required CMake version
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+
+# See cmake --help-policy CMP0011 for details on this one
+IF(POLICY CMP0011)
+  CMAKE_POLICY(SET CMP0011 NEW)
+ENDIF(POLICY CMP0011)
+
+# See cmake --help-policy CMP0026 for details on this one
+IF(POLICY CMP0026)
+  CMAKE_POLICY(SET CMP0026 NEW)
+ENDIF(POLICY CMP0026)
+
+# See cmake --help-policy CMP0045 for details on this one
+IF(POLICY CMP0045)
+  CMAKE_POLICY(SET CMP0045 NEW)
+ENDIF(POLICY CMP0045)
+
+MACRO(OSX_FIX_DYLIB_REFERENCES target libraries)
+
+  IF(APPLE)
+    SET(OFIN_${target}_RPATHS )
+
+    FOREACH(OFIN_${target}_Library ${libraries})
+      IF(${OFIN_${target}_Library} MATCHES "[.]dylib$"
+         OR ${OFIN_${target}_Library} MATCHES "[.]framework/.+")
+
+        # Resolve symlinks and get absolute location
+        GET_FILENAME_COMPONENT(OFIN_${target}_LibraryAbsolute ${OFIN_${target}_Library} ABSOLUTE)
+
+        # Get the baked install name of the library
+        EXECUTE_PROCESS(COMMAND otool -D ${OFIN_${target}_LibraryAbsolute}
+                        OUTPUT_VARIABLE OFIN_${target}_LibraryInstallNameOutput
+                        OUTPUT_STRIP_TRAILING_WHITESPACE)
+        STRING(REGEX REPLACE "[\r\n]" " " OFIN_${target}_LibraryInstallNameOutput ${OFIN_${target}_LibraryInstallNameOutput})
+        SEPARATE_ARGUMENTS(OFIN_${target}_LibraryInstallNameOutput)
+        LIST(GET OFIN_${target}_LibraryInstallNameOutput 1 OFIN_${target}_LibraryInstallName)
+
+        IF(${OFIN_${target}_LibraryInstallName} MATCHES "^[@]rpath/")
+
+          # Ideally, we want to eliminate the longest common suffix of the install name and the absolute path. Whatever's left
+          # will be the desired rpath. But this is difficult to do (especially if there are naming variations, e.g.
+          # "Versions/Current" vs "Versions/5" is a common culprit). So we'll add various candidate rpaths and hope at least one
+          # is correct.
+
+          # Typically, the rpath to a library within a framework looks like this:
+          # @rpath/A.framework/Versions/5/libFoo.dylib
+          #
+          # Hence, we'll extract for the path unit immediately following the @rpath (in this case A.framework) and then look for
+          # it in the library's actual path. Everything before this location will be put in the rpath.
+          SET(OFIN_${target}_PathPrefix ${OFIN_${target}_LibraryInstallName})
+          SET(OFIN_${target}_RpathFirstChild )
+          WHILE(NOT OFIN_${target}_PathPrefix STREQUAL "@rpath")
+            GET_FILENAME_COMPONENT(OFIN_${target}_RpathFirstChild  ${OFIN_${target}_PathPrefix} NAME)
+            GET_FILENAME_COMPONENT(OFIN_${target}_PathPrefix       ${OFIN_${target}_PathPrefix} PATH)
+
+            IF(NOT OFIN_${target}_PathPrefix)  # should never happen but just in case
+              BREAK()
+            ENDIF(NOT OFIN_${target}_PathPrefix)
+
+            IF(OFIN_${target}_PathPrefix STREQUAL "/")  # should never happen but just in case
+              BREAK()
+            ENDIF(OFIN_${target}_PathPrefix STREQUAL "/")
+          ENDWHILE(NOT OFIN_${target}_PathPrefix STREQUAL "@rpath")
+
+          IF(OFIN_${target}_RpathFirstChild)
+            SET(OFIN_${target}_PathPrefix ${OFIN_${target}_LibraryAbsolute})
+            SET(OFIN_${target}_PathUnit )
+            WHILE(NOT OFIN_${target}_PathUnit STREQUAL ${OFIN_${target}_RpathFirstChild})
+              GET_FILENAME_COMPONENT(OFIN_${target}_PathUnit    ${OFIN_${target}_PathPrefix} NAME)
+              GET_FILENAME_COMPONENT(OFIN_${target}_PathPrefix  ${OFIN_${target}_PathPrefix} PATH)
+
+              IF(NOT OFIN_${target}_PathPrefix)
+                BREAK()
+              ENDIF(NOT OFIN_${target}_PathPrefix)
+
+              IF(OFIN_${target}_PathPrefix STREQUAL "/")
+                BREAK()
+              ENDIF(OFIN_${target}_PathPrefix STREQUAL "/")
+            ENDWHILE(NOT OFIN_${target}_PathUnit STREQUAL ${OFIN_${target}_RpathFirstChild})
+
+            IF(OFIN_${target}_PathPrefix)
+              SET(OFIN_${target}_RPATHS ${OFIN_${target}_RPATHS} "${OFIN_${target}_PathPrefix}")
+            ENDIF(OFIN_${target}_PathPrefix)
+          ENDIF(OFIN_${target}_RpathFirstChild)
+
+          # Add the directory containing the library
+          GET_FILENAME_COMPONENT(OFIN_${target}_LibraryAbsolutePath ${OFIN_${target}_LibraryAbsolute} PATH)
+          SET(OFIN_${target}_RPATHS ${OFIN_${target}_RPATHS} "${OFIN_${target}_LibraryAbsolutePath}")
+
+          # Add paths specified as library search prefixes
+          FOREACH(prefix ${CMAKE_PREFIX_PATH})
+            SET(OFIN_${target}_RPATHS ${OFIN_${target}_RPATHS} "${CMAKE_PREFIX_PATH}")
+            SET(OFIN_${target}_RPATHS ${OFIN_${target}_RPATHS} "${CMAKE_PREFIX_PATH}/lib")
+          ENDFOREACH()
+
+        ELSEIF(NOT ${OFIN_${target}_LibraryInstallName} MATCHES "^[@/]")  # just a relative path
+
+          # Replace the unqualified filename, if it appears, with the absolute location, either by directly changing the path or
+          # by editing the rpath
+
+          # -- handle the case when the actual filename is baked in
+          GET_FILENAME_COMPONENT(OFIN_${target}_LibraryFilename ${OFIN_${target}_LibraryAbsolute} NAME)
+          ADD_CUSTOM_COMMAND(TARGET ${target} POST_BUILD
+                             COMMAND install_name_tool
+                             ARGS -change
+                                  ${OFIN_${target}_LibraryFilename}
+                                  ${OFIN_${target}_LibraryAbsolute}
+                                  $<TARGET_FILE:${target}>)
+
+          # -- handle the case when the install name is baked in
+          ADD_CUSTOM_COMMAND(TARGET ${target} POST_BUILD
+                             COMMAND install_name_tool
+                             ARGS -change
+                                  ${OFIN_${target}_LibraryInstallName}
+                                  ${OFIN_${target}_LibraryAbsolute}
+                                  $<TARGET_FILE:${target}>)
+        ENDIF()
+
+      ENDIF()
+    ENDFOREACH(OFIN_${target}_Library)
+
+    # Add the collected rpaths
+    IF(OFIN_${target}_RPATHS)
+      LIST(REMOVE_DUPLICATES OFIN_${target}_RPATHS)
+
+      FOREACH(rpath ${OFIN_${target}_RPATHS})
+        ADD_CUSTOM_COMMAND(TARGET ${target} POST_BUILD
+                           COMMAND bash
+                           ARGS -c "install_name_tool -add_rpath '${rpath}' '$<TARGET_FILE:${target}>' > /dev/null 2>&1 || true"
+                           VERBATIM)
+      ENDFOREACH()
+    ENDIF()
+  ENDIF()
+
+ENDMACRO(OSX_FIX_DYLIB_REFERENCES)

cmake/recipes/external/boost.cmake

@@ -0,0 +1,60 @@
+if(TARGET Boost::boost)
+    return()
+endif()
+
+message(STATUS "Third-party: creating targets 'Boost::boost'...")
+
+cmake_minimum_required(VERSION 3.24) # Ensure modern FetchContent features
+project(BoostFetchExample)
+
+include(FetchContent)
+
+# Define the Boost library to fetch
+FetchContent_Declare(
+    Boost
+    URL https://archives.boost.io/release/1.86.0/source/boost_1_86_0.tar.gz
+    URL_HASH MD5=ac857d73bb754b718a039830b07b9624
+)
+# Fetch Boost
+FetchContent_MakeAvailable(Boost)
+
+
+# Ensure Boost paths are set before CGAL
+set(Boost_INCLUDE_DIR ${boost_SOURCE_DIR})
+set(Boost_LIBRARY_DIR ${boost_BINARY_DIR})
+
+# Add Boost libraries needed for your project
+set(BOOST_LIBRARIES
+    container
+    regex
+    atomic
+    exception
+    chrono
+    wave
+    context
+    coroutine
+    date_time
+    fiber
+    filesystem
+    graph
+    iostreams
+    locale
+    log
+    log_setup
+    unit_test_framework
+    math
+    multiprecision
+    program_options
+    timer
+    random
+    serialization
+    system
+    thread
+    type_erasure
+  )
+
+foreach(lib IN LISTS BOOST_LIBRARIES)
+    add_library(boost_${lib} INTERFACE)
+    target_include_directories(boost_${lib} INTERFACE ${Boost_SOURCE_DIR})
+    target_link_libraries(boost_${lib} INTERFACE Boost::${lib})
+endforeach()

cmake/recipes/external/catch2.cmake

@@ -0,0 +1,14 @@
+if(TARGET Catch2::Catch2)
+    return()
+endif()
+
+message(STATUS "Third-party: creating target 'Catch2::Catch2'")
+
+include(FetchContent)
+FetchContent_Declare(
+    catch2
+    GIT_REPOSITORY https://github.com/catchorg/Catch2.git
+    GIT_TAG v2.13.8
+    GIT_SHALLOW TRUE
+)
+FetchContent_MakeAvailable(catch2)

cmake/recipes/external/cgal.cmake

@@ -0,0 +1,50 @@
+if(TARGET CGAL::CGAL)
+    return()
+endif()
+
+message(STATUS "Third-party: creating target 'CGAL::CGAL'")
+
+include(FetchContent)
+FetchContent_Declare(
+    cgal
+    URL https://github.com/CGAL/cgal/releases/download/v6.0.1/CGAL-6.0.1-library.tar.xz
+    URL_MD5 ea827f6778063e00554ae41f4c845492
+)
+FetchContent_GetProperties(cgal)
+if(cgal_POPULATED)
+    return()
+endif()
+FetchContent_Populate(cgal)
+
+function(cgal_import_target)
+    macro(ignore_package NAME VERSION_NUM)
+        include(CMakePackageConfigHelpers)
+        file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/${NAME}/${NAME}Config.cmake "")
+        write_basic_package_version_file(
+            ${CMAKE_CURRENT_BINARY_DIR}/${NAME}/${NAME}ConfigVersion.cmake
+            VERSION ${VERSION_NUM}
+            COMPATIBILITY AnyNewerVersion
+        )
+        set(${NAME}_DIR ${CMAKE_CURRENT_BINARY_DIR}/${NAME} CACHE PATH "")
+        set(${NAME}_ROOT ${CMAKE_CURRENT_BINARY_DIR}/${NAME} CACHE PATH "")
+    endmacro()
+
+    include(boost)
+
+
+    ignore_package(Boost 1.71.0)
+    set(Boost_INCLUDE_DIRS "")
+    set(Boost_LIBRARIES Boost::thread Boost::system Boost::multiprecision)
+
+    # Prefer Config mode before Module mode to prevent CGAL from loading its own FindXXX.cmake
+    set(CMAKE_FIND_PACKAGE_PREFER_CONFIG TRUE)
+
+    # https://stackoverflow.com/a/71714947/148668
+    set(CGAL_DATA_DIR "unspecified")
+
+    set(CGAL_CMAKE_EXACT_NT_BACKEND "BOOST_BACKEND" CACHE STRING "CGAL exact NT backend")
+    set(CGAL_DISABLE_GMP ON CACHE BOOL "Disable GMP")
+    find_package(CGAL CONFIG COMPONENTS Core PATHS ${cgal_SOURCE_DIR} NO_DEFAULT_PATH)
+endfunction()
+
+cgal_import_target()

cmake/recipes/external/eigen.cmake

@@ -0,0 +1,43 @@
+if(TARGET Eigen3::Eigen)
+    return()
+endif()
+
+message(STATUS "Third-party: creating target 'Eigen3::Eigen'")
+
+include(FetchContent)
+FetchContent_Declare(
+    eigen
+    GIT_REPOSITORY https://gitlab.com/libeigen/eigen.git
+    GIT_TAG tags/3.4.0
+    GIT_SHALLOW TRUE
+)
+FetchContent_GetProperties(eigen)
+if(NOT eigen_POPULATED)
+    FetchContent_Populate(eigen)
+endif()
+
+add_library(Eigen3_Eigen INTERFACE)
+add_library(Eigen3::Eigen ALIAS Eigen3_Eigen)
+
+include(GNUInstallDirs)
+target_include_directories(Eigen3_Eigen SYSTEM INTERFACE
+    $<BUILD_INTERFACE:${eigen_SOURCE_DIR}>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+option(EIGEN_MPL2_ONLY "Compile Eigen with MPL2 code only" OFF)
+if(EIGEN_MPL2_ONLY)
+    target_compile_definitions(Eigen3_Eigen INTERFACE EIGEN_MPL2_ONLY)
+endif()
+
+# On Windows, enable natvis files to improve debugging experience
+if(WIN32 AND eigen_SOURCE_DIR)
+    target_sources(Eigen3_Eigen INTERFACE $<BUILD_INTERFACE:${eigen_SOURCE_DIR}/debug/msvc/eigen.natvis>)
+endif()
+
+# Install rules
+set(CMAKE_INSTALL_DEFAULT_COMPONENT_NAME eigen)
+set_target_properties(Eigen3_Eigen PROPERTIES EXPORT_NAME Eigen)
+install(DIRECTORY ${eigen_SOURCE_DIR}/Eigen DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+install(TARGETS Eigen3_Eigen EXPORT EigenTargets)
+install(EXPORT EigenTargets DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/eigen NAMESPACE Eigen3::)

cmake/recipes/external/embree.cmake

@@ -0,0 +1,53 @@
+if(TARGET embree::embree)
+    return()
+endif()
+
+message(STATUS "Third-party: creating target 'embree::embree'")
+
+include(FetchContent)
+FetchContent_Declare(
+    embree
+    GIT_REPOSITORY https://github.com/embree/embree.git
+    GIT_TAG        v4.4.0
+    GIT_SHALLOW    TRUE
+)
+
+# Set Embree's default options
+option(EMBREE_ISPC_SUPPORT "Build Embree with support for ISPC applications." OFF)
+option(EMBREE_TUTORIALS    "Enable to build Embree tutorials"                 OFF)
+option(EMBREE_STATIC_LIB   "Build Embree as a static library."                ON)
+set(EMBREE_TESTING_INTENSITY 0          CACHE STRING "Intensity of testing (0 = no testing, 1 = verify and tutorials, 2 = light testing, 3 = intensive testing.")
+set(EMBREE_TASKING_SYSTEM    "INTERNAL" CACHE STRING "Selects tasking system")
+set(EMBREE_MAX_ISA           "DEFAULT"  CACHE STRING "Selects highest ISA to support.")
+
+# Ready to include embree's atrocious CMake
+FetchContent_MakeAvailable(embree)
+
+# Disable warnings
+if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+    # Embree's subgrid.h is known for causing array subscript out of bound
+    # warning.  Embree dev claim the code is correct and it is a GCC bug
+    # for misfiring warnings.  See https://github.com/embree/embree/issues/271
+    #
+    # The issue should be fixed for gcc 9.2.1 and later.
+    target_compile_options(embree PRIVATE "-Wno-array-bounds")
+endif()
+
+# Now we need to do some juggling to propagate the include directory properties
+# along with the `embree` target
+include(GNUInstallDirs)
+target_include_directories(embree SYSTEM INTERFACE
+    "$<BUILD_INTERFACE:${embree_SOURCE_DIR}/include>"
+    "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/>"
+)
+
+add_library(embree::embree ALIAS embree)
+
+# Some order for IDEs
+set_target_properties(embree PROPERTIES FOLDER "ThirdParty//Embree")
+set_target_properties(lexers PROPERTIES FOLDER "ThirdParty//Embree")
+set_target_properties(math PROPERTIES FOLDER "ThirdParty//Embree")
+set_target_properties(simd PROPERTIES FOLDER "ThirdParty//Embree")
+set_target_properties(sys PROPERTIES FOLDER "ThirdParty//Embree")
+set_target_properties(tasking PROPERTIES FOLDER "ThirdParty//Embree")
+set_target_properties(uninstall PROPERTIES FOLDER "ThirdParty//Embree")

cmake/recipes/external/glad.cmake

@@ -0,0 +1,17 @@
+if(TARGET glad::glad)
+    return()
+endif()
+
+message(STATUS "Third-party: creating target 'glad::glad'")
+
+include(FetchContent)
+FetchContent_Declare(
+    glad
+    GIT_REPOSITORY https://github.com/libigl/libigl-glad.git
+    GIT_TAG        651a425101365aa6e8504988ef9bb363d066c5ee
+)
+
+FetchContent_MakeAvailable(glad)
+add_library(glad::glad ALIAS glad)
+
+set_target_properties(glad PROPERTIES FOLDER ThirdParty)

cmake/recipes/external/glfw.cmake

@@ -0,0 +1,42 @@
+if(TARGET glfw::glfw)
+    return()
+endif()
+
+message(STATUS "Third-party: creating target 'glfw::glfw'")
+
+include(FetchContent)
+FetchContent_Declare(
+    glfw
+    GIT_REPOSITORY https://github.com/glfw/glfw.git
+    GIT_TAG 3327050ca66ad34426a82c217c2d60ced61526b7
+)
+
+option(GLFW_BUILD_EXAMPLES "Build the GLFW example programs" OFF)
+option(GLFW_BUILD_TESTS "Build the GLFW test programs" OFF)
+option(GLFW_BUILD_DOCS "Build the GLFW documentation" OFF)
+option(GLFW_INSTALL "Generate installation target" OFF)
+option(GLFW_VULKAN_STATIC "Use the Vulkan loader statically linked into application" OFF)
+FetchContent_MakeAvailable(glfw)
+
+add_library(glfw::glfw ALIAS glfw)
+
+set_target_properties(glfw PROPERTIES FOLDER ThirdParty)
+
+# Warning config
+if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "AppleClang")
+    target_compile_options(glfw PRIVATE
+        "-Wno-missing-field-initializers"
+        "-Wno-objc-multiple-method-names"
+    )
+elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+    target_compile_options(glfw PRIVATE
+        "-Wno-missing-field-initializers"
+        "-Wno-objc-multiple-method-names"
+    )
+elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+    target_compile_options(glfw PRIVATE
+        "-Wno-missing-field-initializers"
+        "-Wno-sign-compare"
+        "-Wno-unused-parameter"
+    )
+endif()

cmake/recipes/external/imgui.cmake

@@ -0,0 +1,53 @@
+if(TARGET imgui::imgui)
+    return()
+endif()
+
+message(STATUS "Third-party: creating target 'imgui::imgui'")
+
+include(FetchContent)
+FetchContent_Declare(
+    imgui
+    GIT_REPOSITORY https://github.com/ocornut/imgui.git
+    GIT_TAG v1.85
+    GIT_SHALLOW TRUE
+)
+FetchContent_MakeAvailable(imgui)
+
+set(IMGUI_SRC
+    "${imgui_SOURCE_DIR}/imgui.h"
+    "${imgui_SOURCE_DIR}/imconfig.h"
+    "${imgui_SOURCE_DIR}/imgui_internal.h"
+    "${imgui_SOURCE_DIR}/imgui.cpp"
+    "${imgui_SOURCE_DIR}/imgui_demo.cpp"
+    "${imgui_SOURCE_DIR}/imgui_draw.cpp"
+    "${imgui_SOURCE_DIR}/imgui_widgets.cpp"
+    "${imgui_SOURCE_DIR}/imgui_tables.cpp"
+    "${imgui_SOURCE_DIR}/imstb_rectpack.h"
+    "${imgui_SOURCE_DIR}/imstb_textedit.h"
+    "${imgui_SOURCE_DIR}/imstb_truetype.h"
+    "${imgui_SOURCE_DIR}/backends/imgui_impl_opengl3.h"
+    "${imgui_SOURCE_DIR}/backends/imgui_impl_opengl3.cpp"
+    "${imgui_SOURCE_DIR}/backends/imgui_impl_glfw.h"
+    "${imgui_SOURCE_DIR}/backends/imgui_impl_glfw.cpp"
+    "${imgui_SOURCE_DIR}/misc/cpp/imgui_stdlib.h"
+    "${imgui_SOURCE_DIR}/misc/cpp/imgui_stdlib.cpp"
+)
+
+add_library(imgui ${IMGUI_SRC})
+add_library(imgui::imgui ALIAS imgui)
+
+# Include headers
+target_include_directories(imgui PUBLIC "${imgui_SOURCE_DIR}")
+
+# Compile definitions
+target_compile_definitions(imgui PUBLIC
+    IMGUI_IMPL_OPENGL_LOADER_GLAD
+    IMGUI_DISABLE_OBSOLETE_FUNCTIONS # to check for obsolete functions
+)
+
+# Dependencies
+include(glfw)
+include(glad)
+target_link_libraries(imgui PUBLIC glfw::glfw glad::glad)
+
+set_target_properties(imgui PROPERTIES FOLDER ThirdParty)

cmake/recipes/external/imguizmo.cmake

@@ -0,0 +1,30 @@
+if(TARGET imguizmo::imguizmo)
+    return()
+endif()
+
+message(STATUS "Third-party: creating target 'imguizmo::imguizmo'")
+
+include(FetchContent)
+FetchContent_Declare(
+    imguizmo
+    GIT_REPOSITORY https://github.com/CedricGuillemet/ImGuizmo.git
+    GIT_TAG a23567269f6617342bcc112394bdad937b54b2d7
+)
+FetchContent_MakeAvailable(imguizmo)
+
+set(IMGUIZMO_SRC
+    "${imguizmo_SOURCE_DIR}/ImGuizmo.h"
+    "${imguizmo_SOURCE_DIR}/ImGuizmo.cpp"
+)
+
+add_library(imguizmo ${IMGUIZMO_SRC})
+add_library(imguizmo::imguizmo ALIAS imguizmo)
+
+target_compile_features(imguizmo PUBLIC cxx_std_11)
+
+target_include_directories(imguizmo PUBLIC "${imguizmo_SOURCE_DIR}")
+
+include(imgui)
+target_link_libraries(imguizmo PUBLIC imgui::imgui)
+
+set_target_properties(imguizmo PROPERTIES FOLDER ThirdParty)

cmake/recipes/external/libigl_imgui_fonts.cmake

@@ -0,0 +1,25 @@
+if(TARGET igl::imgui_fonts)
+    return()
+endif()
+
+message(STATUS "Third-party: creating target 'igl::imgui_fonts'")
+
+include(FetchContent)
+FetchContent_Declare(
+    libigl_imgui_fonts
+    GIT_REPOSITORY https://github.com/libigl/libigl-imgui.git
+    GIT_TAG        7e1053e750b0f4c129b046f4e455243cb7f804f3
+)
+FetchContent_GetProperties(libigl_imgui_fonts)
+if(NOT libigl_imgui_fonts_POPULATED)
+    FetchContent_Populate(libigl_imgui_fonts)
+endif()
+
+add_library(igl_imgui_fonts INTERFACE)
+add_library(igl::imgui_fonts ALIAS igl_imgui_fonts)
+
+include(GNUInstallDirs)
+target_include_directories(igl_imgui_fonts SYSTEM INTERFACE
+    $<BUILD_INTERFACE:${libigl_imgui_fonts_SOURCE_DIR}>
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)

cmake/recipes/external/libigl_tests_data.cmake

@@ -0,0 +1,18 @@
+if(TARGET igl::tests_data)
+    return()
+endif()
+
+message(STATUS "Third-party: creating target 'igl::tests_data'")
+
+include(FetchContent)
+FetchContent_Declare(
+    libigl_tests_data
+    GIT_REPOSITORY https://github.com/libigl/libigl-tests-data
+    GIT_TAG        19cedf96d70702d8b3a83eb27934780c542356fe
+)
+FetchContent_MakeAvailable(libigl_tests_data)
+
+add_library(igl_tests_data INTERFACE)
+add_library(igl::tests_data ALIAS igl_tests_data)
+
+target_compile_definitions(igl_tests_data INTERFACE LIBIGL_DATA_DIR=\"${libigl_tests_data_SOURCE_DIR}\")

cmake/recipes/external/libigl_tutorial_data.cmake

@@ -0,0 +1,18 @@
+if(TARGET igl::tutorial_data)
+    return()
+endif()
+
+message(STATUS "Third-party: creating target 'igl::tutorial_data'")
+
+include(FetchContent)
+FetchContent_Declare(
+    libigl_tutorial_data
+    GIT_REPOSITORY https://github.com/libigl/libigl-tutorial-data
+    GIT_TAG        c1f9ede366d02e3531ecbaec5e3769312f31cccd
+)
+FetchContent_MakeAvailable(libigl_tutorial_data)
+
+add_library(igl_tutorial_data INTERFACE)
+add_library(igl::tutorial_data ALIAS igl_tutorial_data)
+
+target_compile_definitions(igl_tutorial_data INTERFACE "-DTUTORIAL_SHARED_PATH=\"${libigl_tutorial_data_SOURCE_DIR}\"")

cmake/recipes/external/predicates.cmake

@@ -0,0 +1,17 @@
+if(TARGET predicates::predicates)
+    return()
+endif()
+
+message(STATUS "Third-party: creating target 'predicates::predicates'")
+
+include(FetchContent)
+FetchContent_Declare(
+    predicates
+    GIT_REPOSITORY https://github.com/libigl/libigl-predicates.git
+    GIT_TAG        decb7bc1260e689cbe008109e3cc5d3a5a433aea
+)
+
+FetchContent_MakeAvailable(predicates)
+add_library(predicates::predicates ALIAS predicates)
+
+set_target_properties(predicates PROPERTIES FOLDER ThirdParty)

cmake/recipes/external/spectra.cmake

@@ -0,0 +1,16 @@
+if(TARGET spectra::spectra)
+  return()
+endif()
+include(FetchContent)
+
+message(STATUS "Third-party: creating target 'spectra::spectra'")
+
+# Use fork because yixuan/spectra struggles to find Eigen3
+FetchContent_Declare(
+  Spectra
+  GIT_REPOSITORY https://github.com/alecjacobson/spectra/
+  GIT_TAG bbdc521b70a733c52ebfc0ac1484c82e13c3d140
+)
+FetchContent_MakeAvailable(Spectra)
+
+add_library(spectra::spectra ALIAS Spectra)

cmake/recipes/external/stb.cmake

@@ -0,0 +1,32 @@
+if(TARGET stb::stb)
+    return()
+endif()
+
+message(STATUS "Third-party: creating target 'stb::stb'")
+
+include(FetchContent)
+FetchContent_Declare(
+    stb
+    GIT_REPOSITORY https://github.com/nothings/stb.git
+    GIT_TAG f67165c2bb2af3060ecae7d20d6f731173485ad0
+)
+FetchContent_MakeAvailable(stb)
+
+# Generate implementation file
+file(WRITE "${stb_BINARY_DIR}/stb_image.cpp.in" [[
+    #define STB_IMAGE_IMPLEMENTATION
+    #include <stb_image.h>
+
+    #define STB_IMAGE_WRITE_IMPLEMENTATION
+    #include <stb_image_write.h>
+]])
+
+configure_file(${stb_BINARY_DIR}/stb_image.cpp.in ${stb_BINARY_DIR}/stb_image.cpp COPYONLY)
+
+# Define stb library
+add_library(stb ${stb_BINARY_DIR}/stb_image.cpp)
+add_library(stb::stb ALIAS stb)
+
+target_include_directories(stb PUBLIC "${stb_SOURCE_DIR}")
+
+set_target_properties(stb PROPERTIES FOLDER ThirdParty)

cmake/recipes/external/tetgen.cmake

@@ -0,0 +1,19 @@
+if(TARGET tetgen::tetgen)
+    return()
+endif()
+
+message(STATUS "Third-party: creating target 'tetgen::tetgen'")
+
+include(FetchContent)
+FetchContent_Declare(
+    tetgen
+    GIT_REPOSITORY https://github.com/libigl/tetgen.git
+    GIT_TAG        e05aca7df74e3f531bc35733ed87d36d437266c5
+)
+
+FetchContent_MakeAvailable(tetgen)
+add_library(tetgen::tetgen ALIAS tetgen)
+
+target_include_directories(tetgen INTERFACE "${tetgen_SOURCE_DIR}")
+
+set_target_properties(tetgen PROPERTIES FOLDER ThirdParty)

cmake/recipes/external/tinyxml2.cmake

@@ -0,0 +1,24 @@
+if(TARGET tinyxml2::tinyxml2)
+    return()
+endif()
+
+message(STATUS "Third-party: creating target 'tinyxml2::tinyxml2'")
+
+# TODO: Update tinyxml2 version + use FetchContent_MakeAvailable with upstream CMake code
+include(FetchContent)
+FetchContent_Declare(
+    tinyxml2
+    GIT_REPOSITORY https://github.com/leethomason/tinyxml2.git
+    GIT_TAG        d175e9de0be0d4db75d0a8cf065599a435a87eb6
+)
+FetchContent_GetProperties(tinyxml2)
+if(NOT tinyxml2_POPULATED)
+    FetchContent_Populate(tinyxml2)
+endif()
+
+add_library(tinyxml2 STATIC ${tinyxml2_SOURCE_DIR}/tinyxml2.cpp ${tinyxml2_SOURCE_DIR}/tinyxml2.h)
+add_library(tinyxml2::tinyxml2 ALIAS tinyxml2)
+target_include_directories(tinyxml2 PUBLIC ${tinyxml2_SOURCE_DIR})
+set_target_properties(tinyxml2 PROPERTIES DEFINE_SYMBOL "TINYXML2_EXPORT")
+
+set_target_properties(tinyxml2 PROPERTIES FOLDER ThirdParty)

cmake/recipes/external/triangle.cmake

@@ -0,0 +1,19 @@
+if(TARGET triangle::triangle)
+    return()
+endif()
+
+message(STATUS "Third-party: creating target 'triangle::triangle'")
+
+include(FetchContent)
+FetchContent_Declare(
+    triangle
+    GIT_REPOSITORY https://github.com/libigl/triangle.git
+    GIT_TAG        62f02db9ab4ff4b62d5ff82a77c8ea458c84c23a
+)
+
+FetchContent_MakeAvailable(triangle)
+add_library(triangle::triangle ALIAS triangle)
+
+target_include_directories(triangle INTERFACE "${triangle_SOURCE_DIR}")
+
+set_target_properties(triangle PROPERTIES FOLDER ThirdParty)

cmake/recipes/hunter/boost.cmake

@@ -0,0 +1,5 @@
+get_filename_component(current_filename ${CMAKE_CURRENT_LIST_FILE} NAME_WLE)
+message(FATAL_ERROR
+    "${current_filename} is not set up to be used with Hunter. "
+    "Please disable the libigl modules depending on it, or set HUNTER_ENABLED to OFF."
+)

cmake/recipes/hunter/catch2.cmake

@@ -0,0 +1 @@
+include(${CMAKE_CURRENT_LIST_DIR}/../external/catch2.cmake)

cmake/recipes/hunter/cgal.cmake

@@ -0,0 +1,5 @@
+get_filename_component(current_filename ${CMAKE_CURRENT_LIST_FILE} NAME_WLE)
+message(FATAL_ERROR
+    "${current_filename} is not set up to be used with Hunter. "
+    "Please disable the libigl modules depending on it, or set HUNTER_ENABLED to OFF."
+)

cmake/recipes/hunter/comiso.cmake

@@ -0,0 +1,5 @@
+get_filename_component(current_filename ${CMAKE_CURRENT_LIST_FILE} NAME_WLE)
+message(FATAL_ERROR
+    "${current_filename} is not set up to be used with Hunter. "
+    "Please disable the libigl modules depending on it, or set HUNTER_ENABLED to OFF."
+)

cmake/recipes/hunter/eigen.cmake

@@ -0,0 +1,2 @@
+hunter_add_package(Eigen)
+find_package(Eigen3 CONFIG REQUIRED)

cmake/recipes/hunter/embree.cmake

@@ -0,0 +1,5 @@
+get_filename_component(current_filename ${CMAKE_CURRENT_LIST_FILE} NAME_WLE)
+message(FATAL_ERROR
+    "${current_filename} is not set up to be used with Hunter. "
+    "Please disable the libigl modules depending on it, or set HUNTER_ENABLED to OFF."
+)

cmake/recipes/hunter/glad.cmake

@@ -0,0 +1,5 @@
+get_filename_component(current_filename ${CMAKE_CURRENT_LIST_FILE} NAME_WLE)
+message(FATAL_ERROR
+    "${current_filename} is not set up to be used with Hunter. "
+    "Please disable the libigl modules depending on it, or set HUNTER_ENABLED to OFF."
+)

cmake/recipes/hunter/glfw.cmake

@@ -0,0 +1,5 @@
+get_filename_component(current_filename ${CMAKE_CURRENT_LIST_FILE} NAME_WLE)
+message(FATAL_ERROR
+    "${current_filename} is not set up to be used with Hunter. "
+    "Please disable the libigl modules depending on it, or set HUNTER_ENABLED to OFF."
+)

cmake/recipes/hunter/gmp.cmake

@@ -0,0 +1,5 @@
+get_filename_component(current_filename ${CMAKE_CURRENT_LIST_FILE} NAME_WLE)
+message(FATAL_ERROR
+    "${current_filename} is not set up to be used with Hunter. "
+    "Please disable the libigl modules depending on it, or set HUNTER_ENABLED to OFF."
+)

cmake/recipes/hunter/imgui.cmake

@@ -0,0 +1,5 @@
+get_filename_component(current_filename ${CMAKE_CURRENT_LIST_FILE} NAME_WLE)
+message(FATAL_ERROR
+    "${current_filename} is not set up to be used with Hunter. "
+    "Please disable the libigl modules depending on it, or set HUNTER_ENABLED to OFF."
+)

cmake/recipes/hunter/imguizmo.cmake

@@ -0,0 +1,5 @@
+get_filename_component(current_filename ${CMAKE_CURRENT_LIST_FILE} NAME_WLE)
+message(FATAL_ERROR
+    "${current_filename} is not set up to be used with Hunter. "
+    "Please disable the libigl modules depending on it, or set HUNTER_ENABLED to OFF."
+)

cmake/recipes/hunter/libigl_imgui_fonts.cmake

@@ -0,0 +1,5 @@
+get_filename_component(current_filename ${CMAKE_CURRENT_LIST_FILE} NAME_WLE)
+message(FATAL_ERROR
+    "${current_filename} is not set up to be used with Hunter. "
+    "Please disable the libigl modules depending on it, or set HUNTER_ENABLED to OFF."
+)

cmake/recipes/hunter/libigl_tests_data.cmake

@@ -0,0 +1 @@
+include(${CMAKE_CURRENT_LIST_DIR}/../external/libigl_tests_data.cmake)

cmake/recipes/hunter/libigl_tutorial_data.cmake

@@ -0,0 +1 @@
+include(${CMAKE_CURRENT_LIST_DIR}/../external/libigl_tutorial_data.cmake)

cmake/recipes/hunter/mpfr.cmake

@@ -0,0 +1,5 @@
+get_filename_component(current_filename ${CMAKE_CURRENT_LIST_FILE} NAME_WLE)
+message(FATAL_ERROR
+    "${current_filename} is not set up to be used with Hunter. "
+    "Please disable the libigl modules depending on it, or set HUNTER_ENABLED to OFF."
+)

cmake/recipes/hunter/predicates.cmake

@@ -0,0 +1,5 @@
+get_filename_component(current_filename ${CMAKE_CURRENT_LIST_FILE} NAME_WLE)
+message(FATAL_ERROR
+    "${current_filename} is not set up to be used with Hunter. "
+    "Please disable the libigl modules depending on it, or set HUNTER_ENABLED to OFF."
+)

cmake/recipes/hunter/stb.cmake

@@ -0,0 +1,5 @@
+get_filename_component(current_filename ${CMAKE_CURRENT_LIST_FILE} NAME_WLE)
+message(FATAL_ERROR
+    "${current_filename} is not set up to be used with Hunter. "
+    "Please disable the libigl modules depending on it, or set HUNTER_ENABLED to OFF."
+)

cmake/recipes/hunter/tetgen.cmake

@@ -0,0 +1,5 @@
+get_filename_component(current_filename ${CMAKE_CURRENT_LIST_FILE} NAME_WLE)
+message(FATAL_ERROR
+    "${current_filename} is not set up to be used with Hunter. "
+    "Please disable the libigl modules depending on it, or set HUNTER_ENABLED to OFF."
+)

cmake/recipes/hunter/tinyxml2.cmake

@@ -0,0 +1,5 @@
+get_filename_component(current_filename ${CMAKE_CURRENT_LIST_FILE} NAME_WLE)
+message(FATAL_ERROR
+    "${current_filename} is not set up to be used with Hunter. "
+    "Please disable the libigl modules depending on it, or set HUNTER_ENABLED to OFF."
+)

cmake/recipes/hunter/triangle.cmake

@@ -0,0 +1,5 @@
+get_filename_component(current_filename ${CMAKE_CURRENT_LIST_FILE} NAME_WLE)
+message(FATAL_ERROR
+    "${current_filename} is not set up to be used with Hunter. "
+    "Please disable the libigl modules depending on it, or set HUNTER_ENABLED to OFF."
+)

docs/index.md

@@ -0,0 +1,54 @@
+# libigl - A simple C++ geometry processing library
+
+This detailed documentation browser is automatically generated from the comments
+in libigl header (.h) files.
+
+In general, each [libigl function](./namespaceigl.html#func-members) (e.g., `igl::func`) will be defined in a
+correspondingly named header file (e.g., `#include <igl/func.h>`).
+
+The _core_ library only depends on the standard template library (`std::`) and 
+Eigen. These functions reside directly the [`igl::` namespace](./namespaceigl.html)
+
+Functions with further dependencies reside in a corresonding sub-namespace. For
+example, the function `igl::spectra::lscm` depends on the Spectra library so it
+resides in the [`igl::spectra::` namespace](./namespaceigl_1_1spectra.html).
+
+Functions which depend on external code under a copyleft license reside in the
+[`igl::copyleft::` namepsace](file:///Users/alecjacobson/Repos/libigl/dox/namespaceigl_1_1copyleft.html).
+
+
+Most libigl functions are templated over the Eigen matrix inputs and outputs.
+Callers can choose their own scalar types (e.g., `double`/`float`) and storage
+orders (`Eigen::ColMajor`/`Eigen::RowMajor`). Libigl can be used as a:
+
+ - **header only library** (via CMake, make sure
+   `LIBIGL_USE_STATIC_LIBRARY=OFF`) and insure that `IGL_STATIC_LIBRARY` is
+   _not_ defined_ when compiling --- easiest if you're new to libigl, or 
+ - **static library** (`LIBIGL_USE_STATIC_LIBRARY=ON` → `IGL_STATIC_LIBRARY` is
+  defined) --- speeds up repeated compilation.
+
+The libigl static library is filled with _explicit template instantiations_ for
+common Eigen inputs and outputs. If the library doesn't contain your types, you
+may get some form of linker error (e.g., `Undefined symbols for architecture`,
+`undefined reference to` or `unresolved external symbol`).
+
+You can fix this by:
+
+1. Switching to header only mode for your project,
+2. Making  a file in your project to compile the missing templates. E.g., `my_templates.cpp` 
+```cpp
+#ifdef IGL_STATIC_LIBRARY
+#undef IGL_STATIC_LIBRARY
+#endif
+#include <igl/per_vertex_normals.h>
+template void igl::per_vertex_normals<Eigen::Matrix<float, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<float, -1, -1, 0, -1, -1> >(Eigen::MatrixBase<Eigen::Matrix<float, -1, -1, 0, -1, -1> > const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<float, -1, -1, 0, -1, -1> >&); 
+```
+3. [Submit a PR](https://github.com/libigl/libigl/pulls) containing your missing template to the development branch of libigl
+4. Change your input/output types to match existing templates (e.g., `Eigen::MatrixXd`).
+
+
+
+
+https://libigl.github.io/
+
+https://github.com/libigl/libigl/

include/igl/ARAPEnergyType.h

@@ -9,27 +9,24 @@
 #define IGL_ARAPENERGYTYPE_H
 namespace igl
 {
-  //     ARAP_ENERGY_TYPE_SPOKES  "As-rigid-as-possible Surface Modeling" by [Sorkine and
-  //       Alexa 2007], rotations defined at vertices affecting incident edges,
-  //       default
-  //     ARAP_ENERGY_TYPE_SPOKES-AND-RIMS  Adapted version of "As-rigid-as-possible Surface
-  //       Modeling" by [Sorkine and Alexa 2007] presented in section 4.2 of or
-  //       "A simple geometric model for elastic deformation" by [Chao et al.
-  //       2010], rotations defined at vertices affecting incident edges and
-  //       opposite edges
-  //     ARAP_ENERGY_TYPE_ELEMENTS  "A local-global approach to mesh parameterization" by
-  //       [Liu et al.  2010] or "A simple geometric model for elastic
-  //       deformation" by [Chao et al.  2010], rotations defined at elements
-  //       (triangles or tets) 
-  //     ARAP_ENERGY_TYPE_DEFAULT  Choose one automatically: spokes and rims
-  //       for surfaces, elements for planar meshes and tets (not fully
-  //       supported)
+  /// Enum for choosing ARAP energy type
   enum ARAPEnergyType
   {
+    /// "As-rigid-as-possible Surface Modeling" by [Sorkine and Alexa 2007],
+    /// rotations defined at vertices affecting incident edges, default
     ARAP_ENERGY_TYPE_SPOKES = 0,
+    /// Adapted version of "As-rigid-as-possible Surface Modeling" by [Sorkine
+    /// and Alexa 2007] presented in section 4.2 of or "A simple geometric model
+    /// for elastic deformation" by [Chao et al.\ 2010], rotations defined at
+    /// vertices affecting incident edges and opposite edges
     ARAP_ENERGY_TYPE_SPOKES_AND_RIMS = 1,
+    /// "A local-global approach to mesh parameterization" by [Liu et al.\ 2010]
+    /// or "A simple geometric model for elastic deformation" by [Chao et al.\ 2010], rotations defined at elements (triangles or tets) 
     ARAP_ENERGY_TYPE_ELEMENTS = 2,
+    /// Choose one automatically: spokes and rims for surfaces, elements for
+    /// planar meshes and tets (not fully supported)
     ARAP_ENERGY_TYPE_DEFAULT = 3,
+    /// Total number of types
     NUM_ARAP_ENERGY_TYPES = 4
   };
 }

include/igl/AtA_cached.cpp

@@ -6,6 +6,7 @@
 // v. 2.0. If a copy of the MPL was not distributed with this file, You can
 // obtain one at http://mozilla.org/MPL/2.0/.
 #include "AtA_cached.h"
+#include "IGL_ASSERT.h"
 
 #include <iostream>
 #include <vector>
@@ -34,12 +35,12 @@ IGL_INLINE void igl::AtA_cached_precompute(
       int col = k;
       int row = *(A.innerIndexPtr()+l);
       int value_index = l;
-      assert(col < A.cols());
-      assert(col >= 0);
-      assert(row < A.rows());
-      assert(row >= 0);
-      assert(value_index >= 0);
-      assert(value_index < A.nonZeros());
+      IGL_ASSERT(col < A.cols());
+      IGL_ASSERT(col >= 0);
+      IGL_ASSERT(row < A.rows());
+      IGL_ASSERT(row >= 0);
+      IGL_ASSERT(value_index >= 0);
+      IGL_ASSERT(value_index < A.nonZeros());
 
       Col_RowPtr[col].push_back(row);
       Col_IndexPtr[col].push_back(value_index);
@@ -74,12 +75,12 @@ IGL_INLINE void igl::AtA_cached_precompute(
       int col = k;
       int row = *(AtA.innerIndexPtr()+l);
       int value_index = l;
-      assert(col < AtA.cols());
-      assert(col >= 0);
-      assert(row < AtA.rows());
-      assert(row >= 0);
-      assert(value_index >= 0);
-      assert(value_index < AtA.nonZeros());
+      IGL_ASSERT(col < AtA.cols());
+      IGL_ASSERT(col >= 0);
+      IGL_ASSERT(row < AtA.rows());
+      IGL_ASSERT(row >= 0);
+      IGL_ASSERT(value_index >= 0);
+      IGL_ASSERT(value_index < AtA.nonZeros());
 
       data.I_outer.push_back(data.I_row.size());
 

include/igl/AtA_cached.h

@@ -13,40 +13,47 @@
 #include <Eigen/Sparse>
 namespace igl
 {  
+  /// Hold precomputed data for AtA_cached
   struct AtA_cached_data
   {
-    // Weights
+    /// Weights (diagonal of W)
     Eigen::VectorXd W;
 
     // Flatten composition rules
+    /// @private
     std::vector<int> I_row;
+    /// @private
     std::vector<int> I_col;
+    /// @private
     std::vector<int> I_w;
 
     // For each entry of AtA, points to the beginning
     // of the composition rules
+    /// @private
     std::vector<int> I_outer;
   };
 
-  // Computes At * W * A, where A is sparse and W is diagonal. Divides the 
-  // construction in two phases, one
-  // for fixing the sparsity pattern, and one to populate it with values. Compared to
-  // evaluating it directly, this version is slower for the first time (since it requires a
-  // precomputation), but faster to the subsequent evaluations.
-  //
-  // Input:
-  //   A m x n sparse matrix
-  //   data stores the precomputed sparsity pattern, data.W contains the optional diagonal weights (stored as a dense vector). If W is not provided, it is replaced by the identity.
-  // Outputs:
-  //   AtA  m by m matrix computed as AtA * W * A
-  //
-  // Example:
-  // AtA_data = igl::AtA_cached_data();
-  // AtA_data.W = W;
-  // if (s.AtA.rows() == 0)
-  //   igl::AtA_cached_precompute(s.A,s.AtA_data,s.AtA);
-  // else
-  //   igl::AtA_cached(s.A,s.AtA_data,s.AtA);
+  /// Computes At * W * A, where A is sparse and W is diagonal.
+  ///
+  /// Divides the construction in two phases, one for fixing the sparsity
+  /// pattern, and one to populate it with values. Compared to evaluating it
+  /// directly, this version is slower for the first time (since it requires a
+  /// precomputation), but faster to the subsequent evaluations.
+  ///
+  /// @param[in] A m x n sparse matrix
+  /// @param[in,out] data stores the precomputed sparsity pattern, data.W contains the optional diagonal weights (stored as a dense vector). If W is not provided, it is replaced by the identity.
+  /// @param[out] AtA  m by m matrix computed as AtA * W * A
+  ///
+  /// #### Example:
+  ///
+  /// \code{cpp}
+  /// AtA_data = igl::AtA_cached_data();
+  /// AtA_data.W = W;
+  /// if (s.AtA.rows() == 0)
+  ///   igl::AtA_cached_precompute(s.A,s.AtA_data,s.AtA);
+  /// else
+  ///   igl::AtA_cached(s.A,s.AtA_data,s.AtA);
+  /// \endcode
   template <typename Scalar>
   IGL_INLINE void AtA_cached_precompute(
     const Eigen::SparseMatrix<Scalar>& A,
@@ -54,6 +61,11 @@ namespace igl
     Eigen::SparseMatrix<Scalar>& AtA
     );
 
+  /// Computes At * W * A, where A is sparse and W is diagonal precomputed into data.
+  ///
+  /// @param[in] A m x n sparse matrix
+  /// @param[in]  data stores the precomputed sparsity pattern, data.W contains the optional diagonal weights (stored as a dense vector). If W is not provided, it is replaced by the identity.
+  /// @param[out] AtA  m by m matrix computed as AtA * W * A
   template <typename Scalar>
   IGL_INLINE void AtA_cached(
     const Eigen::SparseMatrix<Scalar>& A,

include/igl/COLLAPSE_EDGE_NULL.h

@@ -0,0 +1,19 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+// 
+// Copyright (C) 2025 Alec Jacobson <alecjacobson@gmail.com>
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public License 
+// v. 2.0. If a copy of the MPL was not distributed with this file, You can 
+// obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef IGL_COLLAPSE_EDGE_NULL_H
+#define IGL_COLLAPSE_EDGE_NULL_H
+namespace igl
+{
+#ifndef IGL_COLLAPSE_EDGE_NULL
+  /// Special value for indicating a null vertex index as the result of a
+  /// collapsed edge.
+  #define IGL_COLLAPSE_EDGE_NULL 0
+#endif
+}
+#endif

include/igl/C_STR.h

@@ -7,12 +7,23 @@
 // obtain one at http://mozilla.org/MPL/2.0/.
 #ifndef IGL_C_STR_H
 #define IGL_C_STR_H
-// http://stackoverflow.com/a/2433143/148668
-// Suppose you have a function:
-//   void func(const char * c);
-// Then you can write:
-//   func(C_STR("foo"<<1<<"bar"));
 #include <sstream>
 #include <string>
+/// Convert a stream of things to a const char *.
+///
+/// Suppose you have a function:
+/// \code{cpp}
+/// void func(const char * c);
+/// \endcode
+/// Then you can write:
+/// \code{cpp}
+///   func(C_STR("foo"<<1<<"bar"));
+/// \endcode
+/// which is equivalent to:
+/// \code{cpp}
+///   func("foo1bar");
+/// \endcode
+///
+// http://stackoverflow.com/a/2433143/148668
 #define C_STR(X) static_cast<std::ostringstream&>(std::ostringstream().flush() << X).str().c_str()
 #endif

include/igl/Camera.h

@@ -1,359 +0,0 @@
-// This file is part of libigl, a simple c++ geometry processing library.
-// 
-// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
-// 
-// This Source Code Form is subject to the terms of the Mozilla Public License 
-// v. 2.0. If a copy of the MPL was not distributed with this file, You can 
-// obtain one at http://mozilla.org/MPL/2.0/.
-#ifndef IGL_CAMERA_H
-#define IGL_CAMERA_H
-
-// you're idiot, M$!
-#if defined(_WIN32)
-#undef far
-#undef near
-#endif
-
-#include <Eigen/Geometry>
-#include <Eigen/Core>
-#include "PI.h"
-
-#define IGL_CAMERA_MIN_ANGLE 5.0
-namespace igl
-{
-
-  // A simple camera class. The camera stores projection parameters (field of
-  // view angle, aspect ratio, near and far clips) as well as a rigid
-  // transformation *of the camera as if it were also a scene object*. Thus, the
-  // **inverse** of this rigid transformation is the modelview transformation.
-  class Camera
-  {
-    public:
-      // On windows you might need: -fno-delayed-template-parsing
-      //static constexpr double IGL_CAMERA_MIN_ANGLE = 5.;
-      //  m_angle  Field of view angle in degrees {45}
-      //  m_aspect  Aspect ratio {1}
-      //  m_near  near clipping plane {1e-2}
-      //  m_far  far clipping plane {100}
-      //  m_at_dist  distance of looking at point {1}
-      //  m_orthographic  whether to use othrographic projection {false}
-      //  m_rotation_conj  Conjugate of rotation part of rigid transformation of
-      //    camera {identity}. Note: we purposefully store the conjugate because
-      //    this is what TW_TYPE_QUAT4D is expecting.
-      //  m_translation  Translation part of rigid transformation of camera
-      //    {(0,0,1)}
-      double m_angle, m_aspect, m_near, m_far, m_at_dist;
-      bool m_orthographic;
-      Eigen::Quaterniond m_rotation_conj;
-      Eigen::Vector3d m_translation;
-    public:
-      inline Camera();
-      inline virtual ~Camera(){}
-      // Return projection matrix that takes relative camera coordinates and
-      // transforms it to viewport coordinates
-      //
-      // Note:
-      //
-      //     if(m_angle > 0)
-      //     {
-      //       gluPerspective(m_angle,m_aspect,m_near,m_at_dist+m_far);
-      //     }else
-      //     {
-      //       gluOrtho(-0.5*aspect,0.5*aspect,-0.5,0.5,m_at_dist+m_near,m_far);
-      //     }
-      //
-      // Is equivalent to
-      //
-      //     glMultMatrixd(projection().data());
-      //
-      inline Eigen::Matrix4d projection() const;
-      // Return an Affine transformation (rigid actually) that 
-      // takes relative coordinates and tramsforms them into world 3d
-      // coordinates: moves the camera into the scene.
-      inline Eigen::Affine3d affine() const;
-      // Return an Affine transformation (rigid actually) that puts the takes a
-      // world 3d coordinate and transforms it into the relative camera
-      // coordinates: moves the scene in front of the camera.
-      //
-      // Note:
-      //
-      //     gluLookAt(
-      //       eye()(0), eye()(1), eye()(2),
-      //       at()(0), at()(1), at()(2),
-      //       up()(0), up()(1), up()(2));
-      //
-      // Is equivalent to
-      //
-      //     glMultMatrixd(camera.inverse().matrix().data());
-      //
-      // See also: affine, eye, at, up
-      inline Eigen::Affine3d inverse() const;
-      // Returns world coordinates position of center or "eye" of camera.
-      inline Eigen::Vector3d eye() const;
-      // Returns world coordinate position of a point "eye" is looking at.
-      inline Eigen::Vector3d at() const;
-      // Returns world coordinate unit vector of "up" vector
-      inline Eigen::Vector3d up() const;
-      // Return top right corner of unit plane in relative coordinates, that is
-      // (w/2,h/2,1)
-      inline Eigen::Vector3d unit_plane() const;
-      // Move dv in the relative coordinate frame of the camera (move the FPS)
-      //
-      // Inputs:
-      //   dv  (x,y,z) displacement vector
-      //
-      inline void dolly(const Eigen::Vector3d & dv);
-      // "Scale zoom": Move `eye`, but leave `at`
-      //
-      // Input:
-      //   s  amount to scale distance to at
-      inline void push_away(const double s);
-      // Aka "Hitchcock", "Vertigo", "Spielberg" or "Trombone" zoom:
-      // simultaneously dolly while changing angle so that `at` not only stays
-      // put in relative coordinates but also projected coordinates. That is
-      //
-      // Inputs:
-      //   da  change in angle in degrees
-      inline void dolly_zoom(const double da);
-      // Turn around eye so that rotation is now q
-      //
-      // Inputs:
-      //   q  new rotation as quaternion
-      inline void turn_eye(const Eigen::Quaterniond & q);
-      // Orbit around at so that rotation is now q
-      //
-      // Inputs:
-      //   q  new rotation as quaternion
-      inline void orbit(const Eigen::Quaterniond & q);
-      // Rotate and translate so that camera is situated at "eye" looking at "at"
-      // with "up" pointing up.
-      //
-      // Inputs:
-      //   eye  (x,y,z) coordinates of eye position
-      //   at   (x,y,z) coordinates of at position
-      //   up   (x,y,z) coordinates of up vector
-      inline void look_at(
-        const Eigen::Vector3d & eye,
-        const Eigen::Vector3d & at,
-        const Eigen::Vector3d & up);
-    // Needed any time Eigen Structures are used as class members
-    // http://eigen.tuxfamily.org/dox-devel/group__TopicStructHavingEigenMembers.html
-    public:
-        EIGEN_MAKE_ALIGNED_OPERATOR_NEW
-  };
-}
-
-// Implementation
-#include "PI.h"
-#include "EPS.h"
-#include <cmath>
-#include <iostream>
-#include <cassert>
-
-inline igl::Camera::Camera():
-  m_angle(45.0),m_aspect(1),m_near(1e-2),m_far(100),m_at_dist(1),
-  m_orthographic(false),
-  m_rotation_conj(1,0,0,0),
-  m_translation(0,0,1)
-{
-}
-
-inline Eigen::Matrix4d igl::Camera::projection() const
-{
-  Eigen::Matrix4d P;
-  using namespace std;
-  const double far = m_at_dist + m_far;
-  const double near = m_near;
-  // http://stackoverflow.com/a/3738696/148668
-  if(m_orthographic)
-  {
-    const double f = 0.5;
-    const double left = -f*m_aspect;
-    const double right = f*m_aspect;
-    const double bottom = -f;
-    const double top = f;
-    const double tx = (right+left)/(right-left);
-    const double ty = (top+bottom)/(top-bottom);
-    const double tz = (far+near)/(far-near);
-    const double z_fix = 0.5 /m_at_dist / tan(m_angle*0.5 * (igl::PI/180.) );
-    P<<
-      z_fix*2./(right-left), 0, 0, -tx,
-      0, z_fix*2./(top-bottom), 0, -ty,
-      0, 0, -z_fix*2./(far-near),  -tz,
-      0, 0, 0, 1;
-  }else
-  {
-    const double yScale = tan(PI*0.5 - 0.5*m_angle*PI/180.);
-    // http://stackoverflow.com/a/14975139/148668
-    const double xScale = yScale/m_aspect;
-    P<< 
-      xScale, 0, 0, 0,
-      0, yScale, 0, 0,
-      0, 0, -(far+near)/(far-near), -1,
-      0, 0, -2.*near*far/(far-near), 0;
-    P = P.transpose().eval();
-  }
-  return P;
-}
-
-inline Eigen::Affine3d igl::Camera::affine() const
-{
-  using namespace Eigen;
-  Affine3d t = Affine3d::Identity();
-  t.rotate(m_rotation_conj.conjugate());
-  t.translate(m_translation);
-  return t;
-}
-
-inline Eigen::Affine3d igl::Camera::inverse() const
-{
-  using namespace Eigen;
-  Affine3d t = Affine3d::Identity();
-  t.translate(-m_translation);
-  t.rotate(m_rotation_conj);
-  return t;
-}
-
-inline Eigen::Vector3d igl::Camera::eye() const
-{
-  using namespace Eigen;
-  return affine() * Vector3d(0,0,0);
-}
-
-inline Eigen::Vector3d igl::Camera::at() const
-{
-  using namespace Eigen;
-  return affine() * (Vector3d(0,0,-1)*m_at_dist);
-}
-
-inline Eigen::Vector3d igl::Camera::up() const
-{
-  using namespace Eigen;
-  Affine3d t = Affine3d::Identity();
-  t.rotate(m_rotation_conj.conjugate());
-  return t * Vector3d(0,1,0);
-}
-
-inline Eigen::Vector3d igl::Camera::unit_plane() const
-{
-  // Distance of center pixel to eye
-  const double d = 1.0;
-  const double a = m_aspect;
-  const double theta = m_angle*PI/180.;
-  const double w =
-    2.*sqrt(-d*d/(a*a*pow(tan(0.5*theta),2.)-1.))*a*tan(0.5*theta);
-  const double h = w/a;
-  return Eigen::Vector3d(w*0.5,h*0.5,-d);
-}
-
-inline void igl::Camera::dolly(const Eigen::Vector3d & dv)
-{
-  m_translation += dv;
-}
-
-inline void igl::Camera::push_away(const double s)
-{
-  using namespace Eigen;
-#ifndef NDEBUG
-  Vector3d old_at = at();
-#endif
-  const double old_at_dist = m_at_dist;
-  m_at_dist = old_at_dist * s;
-  dolly(Vector3d(0,0,1)*(m_at_dist - old_at_dist));
-  assert((old_at-at()).squaredNorm() < DOUBLE_EPS);
-}
-
-inline void igl::Camera::dolly_zoom(const double da)
-{
-  using namespace std;
-  using namespace Eigen;
-#ifndef NDEBUG
-  Vector3d old_at = at();
-#endif
-  const double old_angle = m_angle;
-  if(old_angle + da < IGL_CAMERA_MIN_ANGLE)
-  {
-    m_orthographic = true;
-  }else if(old_angle + da > IGL_CAMERA_MIN_ANGLE)
-  {
-    m_orthographic = false;
-  }
-  if(!m_orthographic)
-  {
-    m_angle += da;
-    m_angle = min(89.,max(IGL_CAMERA_MIN_ANGLE,m_angle));
-    // change in distance
-    const double s = 
-      (2.*tan(old_angle/2./180.*igl::PI)) /
-      (2.*tan(m_angle/2./180.*igl::PI)) ;
-    const double old_at_dist = m_at_dist;
-    m_at_dist = old_at_dist * s;
-    dolly(Vector3d(0,0,1)*(m_at_dist - old_at_dist));
-    assert((old_at-at()).squaredNorm() < DOUBLE_EPS);
-  }
-}
-
-inline void igl::Camera::turn_eye(const Eigen::Quaterniond & q)
-{
-  using namespace Eigen;
-  Vector3d old_eye = eye();
-  // eye should be fixed
-  //
-  // eye_1 = R_1 * t_1 = eye_0
-  // t_1 = R_1' * eye_0
-  m_rotation_conj = q.conjugate();
-  m_translation = m_rotation_conj * old_eye;
-  assert((old_eye - eye()).squaredNorm() < DOUBLE_EPS);
-}
-
-inline void igl::Camera::orbit(const Eigen::Quaterniond & q)
-{
-  using namespace Eigen;
-  Vector3d old_at = at();
-  // at should be fixed
-  //
-  // at_1 = R_1 * t_1 - R_1 * z = at_0
-  // t_1 = R_1' * (at_0 + R_1 * z)
-  m_rotation_conj = q.conjugate();
-  m_translation = 
-    m_rotation_conj * 
-      (old_at + 
-         m_rotation_conj.conjugate() * Vector3d(0,0,1) * m_at_dist);
-  assert((old_at - at()).squaredNorm() < DOUBLE_EPS);
-}
-
-inline void igl::Camera::look_at(
-  const Eigen::Vector3d & eye,
-  const Eigen::Vector3d & at,
-  const Eigen::Vector3d & up)
-{
-  using namespace Eigen;
-  using namespace std;
-  // http://www.opengl.org/sdk/docs/man2/xhtml/gluLookAt.xml
-  // Normalize vector from at to eye
-  Vector3d F = eye-at;
-  m_at_dist = F.norm();
-  F.normalize();
-  // Project up onto plane orthogonal to F and normalize
-  assert(up.cross(F).norm() > DOUBLE_EPS && "(eye-at) x up ≈ 0");
-  const Vector3d proj_up = (up-(up.dot(F))*F).normalized();
-  Quaterniond a,b;
-  a.setFromTwoVectors(Vector3d(0,0,-1),-F);
-  b.setFromTwoVectors(a*Vector3d(0,1,0),proj_up);
-  m_rotation_conj = (b*a).conjugate();
-  m_translation = m_rotation_conj * eye;
-  //cout<<"m_at_dist: "<<m_at_dist<<endl;
-  //cout<<"proj_up: "<<proj_up.transpose()<<endl;
-  //cout<<"F: "<<F.transpose()<<endl;
-  //cout<<"eye(): "<<this->eye().transpose()<<endl;
-  //cout<<"at(): "<<this->at().transpose()<<endl;
-  //cout<<"eye()-at(): "<<(this->eye()-this->at()).normalized().transpose()<<endl;
-  //cout<<"eye-this->eye(): "<<(eye-this->eye()).squaredNorm()<<endl;
-  assert(           (eye-this->eye()).squaredNorm() < DOUBLE_EPS);
-  //assert((F-(this->eye()-this->at()).normalized()).squaredNorm() < 
-  //  DOUBLE_EPS);
-  assert(           (at-this->at()).squaredNorm() < DOUBLE_EPS);
-  //assert(        (proj_up-this->up()).squaredNorm() < DOUBLE_EPS);
-}
-
-#endif