Function MakeCubeMesh

src/colmap/mvs/texture_mapping_test.cc:174–207

Create a 12-face cube mesh (2 triangles per face).

// Create a 12-face cube mesh (2 triangles per face).
PlyMesh MakeCubeMesh() {
  PlyMesh mesh;
  mesh.vertices = {
      PlyMeshVertex(0, 0, 0),
      PlyMeshVertex(1, 0, 0),
      PlyMeshVertex(1, 1, 0),
      PlyMeshVertex(0, 1, 0),
      PlyMeshVertex(0, 0, 1),
      PlyMeshVertex(1, 0, 1),
      PlyMeshVertex(1, 1, 1),
      PlyMeshVertex(0, 1, 1),
  };
  mesh.faces = {
      // Front (Z=0): 0,2,1 and 0,3,2
      PlyMeshFace(0, 2, 1),
      PlyMeshFace(0, 3, 2),
      // Back (Z=1): 4,5,6 and 4,6,7
      PlyMeshFace(4, 5, 6),
      PlyMeshFace(4, 6, 7),
      // Left (X=0): 0,7,3 and 0,4,7
      PlyMeshFace(0, 7, 3),
      PlyMeshFace(0, 4, 7),
      // Right (X=1): 1,6,5 and 1,2,6
      PlyMeshFace(1, 6, 5),
      PlyMeshFace(1, 2, 6),
      // Bottom (Y=0): 0,5,4 and 0,1,5
      PlyMeshFace(0, 5, 4),
      PlyMeshFace(0, 1, 5),
      // Top (Y=1): 3,6,2 and 3,7,6
      PlyMeshFace(3, 6, 2),
      PlyMeshFace(3, 7, 6),
  };
  return mesh;
}

TEST(MeshTextureMapping, EndToEnd) {
  const PlyMesh mesh = MakeTriangleMesh();