+ Path3D &get_path() { return *path; }
+
+ virtual Point get_node() const;
+ virtual bool is_visible() const { return true; }
+
+ Msp::GL::Matrix get_matrix() const;
+ virtual void setup_render(Msp::GL::Renderer &, const Msp::GL::Tag &) const;
+ virtual void finish_render(Msp::GL::Renderer &, const Msp::GL::Tag &) const;