int main(int argc, char** argv)
{
typedef boost::property_map<
Polyhedron,
CGAL::face_index_t
>::const_type Face_index_map;
std::ifstream in((argc>1)?argv[1]:"cube.off");
Polyhedron P;
in >> P ;
// initialize facet indices
std::size_t i = 0;
for(Polyhedron::Facet_iterator it = P.facets_begin(); it != P.facets_end(); ++it, ++i)
{
it->id() = i;
}
// Ad hoc property_map to store normals. Face_index_map is used to
// map face_descriptors to a contiguous range of indices. See
// http://www.boost.org/libs/property_map/doc/vector_property_map.html
// for details.
boost::vector_property_map<Vector, Face_index_map>
normals(get(CGAL::face_index, P));
calculate_face_normals(
P // Graph
, get(CGAL::vertex_point, P) // map from vertex_descriptor to point
, normals // map from face_descriptor to Vector_3
);
std::cout << "Normals" << std::endl;
for(Polyhedron::Facet_iterator it = P.facets_begin(); it != P.facets_end(); ++it) {
// Facet_iterator is a face_descriptor, so we can use it as the
// key here
std::cout << normals[it] << std::endl;
}
return 0;
}
void CL_Collada_Triangles_Impl::create_vertices_texcoords(CL_Vec2f *destination, int stride, const CL_String &semantic)
{
CL_Collada_Input_Shared &input = get_input(semantic);
CL_Collada_Source &source = input.get_source();
if (source.is_null())
{
throw CL_Exception("unsupported situation. fixme");
}
std::vector<CL_Vec3f> &pos_array = source.get_vec3f_array();
unsigned int primitive_offset = input.get_offset();
std::vector<CL_Vec3f> face_normals;
calculate_face_normals(face_normals, pos_array, primitive_offset);
std::vector<int> face_offsets;
std::vector<int> faces;
generate_point_facelist(face_offsets, faces, pos_array.size(), primitive_offset);
calculate_texcoords(face_offsets, faces, pos_array, face_normals, destination, stride, primitive_offset );
}
