Merge branch 'master' of github.com:libigl/libigl

Former-commit-id: 8893d62c15

tutorial/502_LSCMParam/CMakeLists.txt

@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 2.6)
+project(502_LSCMParam)
+
+include("../CMakeLists.shared")
+
+set(SOURCES
+${PROJECT_SOURCE_DIR}/main.cpp
+)
+
+add_executable(${CMAKE_PROJECT_NAME} ${SOURCES} ${SHARED_SOURCES})
+target_link_libraries(${CMAKE_PROJECT_NAME} ${SHARED_LIBRARIES})

tutorial/502_LSCMParam/main.cpp

@@ -0,0 +1,53 @@
+#include <igl/readOFF.h>
+#include <igl/viewer/Viewer.h>
+
+#include <igl/lscm.h>
+
+Eigen::MatrixXd V;
+Eigen::MatrixXi F;
+Eigen::MatrixXd V_uv;
+
+bool key_down(igl::Viewer& viewer, unsigned char key, int modifier)
+{
+
+  if (key == '1')
+    // Plot the 3D mesh
+    viewer.set_mesh(V,F);
+  else if (key == '2')
+    // Plot the mesh in 2D using the UV coordinates as vertex coordinates
+    viewer.set_mesh(V_uv,F);
+
+  viewer.compute_normals();
+
+  return false;
+}
+
+int main(int argc, char *argv[])
+{
+  using namespace Eigen;
+  using namespace std;
+
+  // Load a mesh in OFF format
+  igl::readOFF("../shared/camelhead.off", V, F);
+
+  // LSCM parametrization
+  V_uv = igl::lscm(V,F,Eigen::VectorXi(),Eigen::MatrixXd());
+
+  // Scale the uv
+  V_uv *= 5;
+
+  // Plot the mesh
+  igl::Viewer viewer;
+  viewer.set_mesh(V, F);
+  viewer.set_uv(V_uv);
+  viewer.callback_key_down = &key_down;
+
+  // Disable wireframe
+  viewer.options.show_lines = false;
+
+  // Draw checkerboard texture
+  viewer.options.show_texture = true;
+
+  // Launch the viewer
+  viewer.launch();
+}