X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Frender%2Foccludedscene.h;fp=source%2Frender%2Foccludedscene.h;h=2898bb3ff92032c703c916232ae7459845c0fe8c;hb=7aaec9a70b8d7733429bec043f8e33e02956f266;hp=0000000000000000000000000000000000000000;hpb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;p=libs%2Fgl.git

diff --git a/source/render/occludedscene.h b/source/render/occludedscene.h
new file mode 100644
index 00000000..2898bb3f
--- /dev/null
+++ b/source/render/occludedscene.h
@@ -0,0 +1,61 @@
+#ifndef MSP_GL_OCCLUDEDSCENE_H_
+#define MSP_GL_OCCLUDEDSCENE_H_
+
+#include <set>
+#include <vector>
+#include "mesh.h"
+#include "program.h"
+#include "scene.h"
+
+namespace Msp {
+namespace GL {
+
+/**
+A scene that performs occlusion queries on renderables to skip those that are
+entirely occluded by others.
+*/
+class OccludedScene: public Scene
+{
+private:
+	struct OccludedRenderable
+	{
+		Renderable *renderable;
+		const Geometry::BoundingSphere<float, 3> *bounding_sphere;
+		bool in_frustum;
+		bool occluder;
+		unsigned query;
+
+		OccludedRenderable();
+	};
+
+	typedef std::set<Renderable *> RenderableSet;
+	typedef std::vector<OccludedRenderable> OccludedArray;
+
+	Mesh bounding_mesh;
+	Program bounding_shader;
+	RenderableSet renderables;
+	float occluder_min_size;
+	mutable OccludedArray occluded_cache;
+	mutable bool cache_dirty;
+
+public:
+	OccludedScene();
+	~OccludedScene();
+
+	virtual void add(Renderable &);
+	virtual void remove(Renderable &);
+
+private:
+	void populate_cache() const;
+
+public:
+	virtual void setup_frame(Renderer &);
+	virtual void finish_frame();
+
+	virtual void render(Renderer &, const Tag & = Tag()) const;
+};
+
+} // namespace GL
+} // namespace Msp
+
+#endif