private HalfEdgeMesh CreateUnitCubeMesh()
{
var vertices = new[]
{
new Point3D(0, 0, 0), new Point3D(1, 0, 0), new Point3D(1, 1, 0), new Point3D(0, 1, 0),
new Point3D(0, 0, 1), new Point3D(1, 0, 1), new Point3D(1, 1, 1), new Point3D(0, 1, 1)
};
var mesh = new HalfEdgeMesh(vertices);
mesh.AddFace(3, 2, 1, 0);
mesh.AddFace(4, 5, 6, 7);
mesh.AddFace(0, 1, 5, 4);
mesh.AddFace(1, 2, 6, 5);
mesh.AddFace(2, 3, 7, 6);
mesh.AddFace(3, 0, 4, 7);
return mesh;
}