Some tweaks to vector component handling

[libs/gl.git] / source / render / scene.h

diff --git a/source/render/scene.h b/source/render/scene.h
index f89f10daf26691412de2f950925b11b524d9c783..6f4f48d675e6bce3db2850ca24eb78466157769e 100644 (file)
--- a/source/render/scene.h
+++ b/source/render/scene.h
@@ -11,9 +11,15 @@ namespace Msp {
 namespace GL {
 
 /**
-Scenes are containers for other Renderables.  This is a base class that can't
-be instantiated.  Examples of available Scene types are SimpleScene,
-InstancedScene and OrderedScene.
+Container for other renderables.  Subclasses provide different ways of
+rendering the contents.
+
+All types of Scenes perform frustum culling on the contents, skipping
+renderables whose bounding sphere is fully outside the view volume.  If a
+bounding sphere cannot be determined, culling is not performed on that
+renderable.
+
+SimpleScene is a good default choice if there are no specific requirements.
 */
 class Scene: public Renderable
 {
@@ -54,23 +60,14 @@ public:
 
 protected:
        mutable Matrix culling_matrix;
-       mutable Vector4 frustum_edges[6];
 
        Scene() = default;
-private:
-       Scene(const Scene &);
-       Scene &operator=(const Scene &);
 public:
        virtual ~Scene() = default;
 
        virtual void add(Renderable &) = 0;
        virtual void remove(Renderable &) = 0;
 
-protected:
-       bool setup_frustum(const Renderer &) const;
-       bool frustum_cull(const Renderable &) const;
-
-public:
        template<typename T>
        static void register_type(const std::string &);
 private: