added texture index functions

src/InputOutput.cc

@@ -22,6 +22,7 @@ void def_read_mesh(py::module& m, const char *_name) {
 			bool _edge_color,
 			bool _face_normal,
 			bool _face_color,
+			bool _face_texture_index,
 			bool _color_alpha,
 			bool _color_float
 		)
@@ -66,11 +67,14 @@ void def_read_mesh(py::module& m, const char *_name) {
 				options += OM::IO::Options::FaceColor;
 				mesh.request_face_colors();
 			}
+			if (_face_texture_index) {
+				mesh.request_face_texture_index();
+			}
 
 			if (_color_alpha) options += OM::IO::Options::ColorAlpha;
 			if (_color_float) options += OM::IO::Options::ColorFloat;
 
-			const bool ok = OM::IO::read_mesh(mesh,_filename, options);
+			const bool ok = OM::IO::read_mesh(mesh, _filename, options);
 
 			if (!ok) {
 				const std::string msg = "File could not be read: " + _filename;
@@ -120,6 +124,7 @@ void def_read_mesh(py::module& m, const char *_name) {
 		py::arg("edge_color")=false,
 		py::arg("face_normal")=false,
 		py::arg("face_color")=false,
+		py::arg("face_texture_index")=false,
 		py::arg("color_alpha")=false,
 		py::arg("color_float")=false
 	);

src/Mesh.hh

@@ -469,6 +469,7 @@ void expose_mesh(py::module& m, const char *_name) {
 	typedef typename Mesh::TexCoord1D TexCoord1D;
 	typedef typename Mesh::TexCoord2D TexCoord2D;
 	typedef typename Mesh::TexCoord3D TexCoord3D;
+	typedef typename Mesh::TextureIndex TextureIndex;
 
 	//======================================================================
 	//  KernelT Function Pointers
@@ -801,6 +802,33 @@ void expose_mesh(py::module& m, const char *_name) {
 		.def("sedges", sedges)
 		.def("sfaces", sfaces)
 
+		.def("texture_index", [](Mesh& _self, OM::FaceHandle _h) {
+				if (!_self.has_face_texture_index()) _self.request_face_texture_index();
+				return _self.texture_index(_h);
+			})
+
+		.def("set_texture_index", [](Mesh& _self, OM::FaceHandle _h, TextureIndex _idx) {
+				if (!_self.has_face_texture_index()) _self.request_face_texture_index();
+				_self.set_texture_index(_h, _idx);
+			})
+
+		.def("texture_name", [](Mesh& _self, TextureIndex _idx) {
+				OM::MPropHandleT<std::map<TextureIndex, std::string> > prop;
+				if (_self.get_property_handle(prop, "TextureMapping")) {
+					const auto map =  _self.property(prop);
+					if (map.count(_idx) == 0) {
+						throw py::index_error();
+					}
+					else {
+						return map.at(_idx);
+					}
+				}
+				else {
+					PyErr_SetString(PyExc_RuntimeError, "Mesh has no textures.");
+					throw py::error_already_set();
+				}
+			})
+
 		//======================================================================
 		//  BaseKernel
 		//======================================================================