booleans in tutorial

2014-11-04 11:57:16 -05:00
parent 0ce56f2a70
commit 7a8984f6ae
21 changed files with 483 additions and 36 deletions
@@ -0,0 +1,94 @@
+#include <igl/readOFF.h>
+#define IGL_NO_CORK
+#include <igl/boolean/mesh_boolean.h>
+#include <igl/viewer/Viewer.h>
+
+#include <Eigen/Core>
+#include <iostream>
+
+Eigen::MatrixXd VA,VB,VC;
+Eigen::VectorXi J;
+Eigen::MatrixXi FA,FB,FC;
+igl::MeshBooleanType boolean_type(igl::MESH_BOOLEAN_TYPE_UNION);
+
+const char * MESH_BOOLEAN_TYPE_NAMES[] = 
+{
+  "Union",
+  "Intersect",
+  "Minus",
+  "XOR",
+  "Resolve",
+};
+
+void update(igl::Viewer &viewer)
+{
+  igl::mesh_boolean(VA,FA,VB,FB,boolean_type,VC,FC,J);
+  Eigen::MatrixXd C(FC.rows(),3);
+  for(size_t f = 0;f<C.rows();f++)
+  {
+    if(J(f)<FA.rows())
+    {
+      C.row(f) = Eigen::RowVector3d(1,0,0);
+    }else
+    {
+      C.row(f) = Eigen::RowVector3d(0,1,0);
+    }
+  }
+  viewer.data.clear();
+  viewer.data.set_mesh(VC,FC);
+  viewer.data.set_colors(C);
+}
+
+bool key_down(igl::Viewer &viewer, unsigned char key, int mods)
+{
+  switch(key)
+  {
+    default:
+      return false;
+    case '.':
+      boolean_type = 
+        static_cast<igl::MeshBooleanType>(
+          (boolean_type+1)% igl::NUM_MESH_BOOLEAN_TYPES);
+      break;
+    case ',':
+      boolean_type = 
+        static_cast<igl::MeshBooleanType>(
+          (boolean_type+igl::NUM_MESH_BOOLEAN_TYPES-1)%
+          igl::NUM_MESH_BOOLEAN_TYPES);
+      break;
+    case '[':
+      viewer.core.camera_dnear -= 0.1;
+      return true;
+    case ']':
+      viewer.core.camera_dnear += 0.1;
+      return true;
+  }
+  std::cout<<"A "<<MESH_BOOLEAN_TYPE_NAMES[boolean_type]<<" B."<<std::endl;
+  igl::mesh_boolean(VA,FA,VB,FB,boolean_type,VC,FC);
+  update(viewer);
+  return true;
+}
+
+int main(int argc, char *argv[])
+{
+  using namespace Eigen;
+  using namespace std;
+  igl::readOFF("../shared/cheburashka.off",VA,FA);
+  igl::readOFF("../shared/decimated-knight.off",VB,FB);
+  // Plot the mesh with pseudocolors
+  igl::Viewer viewer;
+
+  // Initialize
+  update(viewer);
+
+  viewer.core.show_lines = true;
+  viewer.callback_key_down = &key_down;
+  viewer.core.camera_dnear = 3.9;
+  cout<<
+    "Press '.' to switch to next boolean operation type."<<endl<<
+    "Press ',' to switch to previous boolean operation type."<<endl<<
+    "Press ']' to push near cutting plane away from camera."<<endl<<
+    "Press '[' to pull near cutting plane closer to camera."<<endl<<
+    "Hint: investigate _inside_ the model to see orientation changes."<<endl;
+  viewer.launch();
+}