X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fzsortedscene.h;fp=source%2Fzsortedscene.h;h=f9f6f7eed40bd9cfa527540c5417c6fbce3ae75e;hp=0000000000000000000000000000000000000000;hb=c87860db3b23a98eda1adfe59acddffdb6eb8420;hpb=78328c5f6e4dcbe883a3f5e4fe0974ab490be3f7

diff --git a/source/zsortedscene.h b/source/zsortedscene.h
new file mode 100644
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+++ b/source/zsortedscene.h
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+#ifndef MSP_GL_ZSORTEDSCENE_H_
+#define MSP_GL_ZSORTEDSCENE_H_
+
+#include "simplescene.h"
+
+namespace Msp {
+namespace GL {
+
+enum SortOrder
+{
+	FRONT_TO_BACK,
+	BACK_TO_FRONT
+};
+
+enum DepthReference
+{
+	CLOSEST,
+	CENTER,
+	FURTHEST
+};
+
+/**
+Sorts renderables by their distance from the camera before rendering.  Requires
+renderables to have a matrix.
+*/
+class ZSortedScene: public SimpleScene
+{
+private:
+	struct DepthRenderable
+	{
+		float depth;
+		const Renderable *renderable;
+
+		DepthRenderable(float, const Renderable *);
+
+		bool operator<(const DepthRenderable &o) const { return depth<o.depth; }
+	};
+
+	SortOrder order;
+	DepthReference reference;
+
+public:
+	ZSortedScene();
+
+	/// Sets the sort order.  Default is back to front.
+	void set_order(SortOrder);
+
+	/// Sets the reference point for sorting.  Default is furthest from camera.
+	void set_reference(DepthReference);
+
+	virtual void render(Renderer &, const Tag &) const;
+};
+
+} // namespace GL
+} // namespace Msp
+
+#endif