void simple_plugin_interface::do_it (shade_interface *shade, scene_interface *scene, void *) {
	if (!shade || !scene) return;

	shape_class &shape = scene->active_shape();
	if (shape.get_type() != enums::polygon_mesh) return;

	polygon_mesh_class &polygon_mesh = shape.get_polygon_mesh();
	face_class &face = polygon_mesh.face(0);

	{	int n = face.get_parameter_uv(0);
		vec2 *uv = new vec2[n];
		face.get_parameter_uv(uv);
		char buff[256];
		for (int i = 0; i < n; ++i) {
			sprintf(buff, "%d: uv x:%f y:%f", i, uv[i].x, uv[i].y);
			shade->message(buff);
		}
		delete [] uv;
	}
}