X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Frender%2Fobjectinstance.h;fp=source%2Frender%2Fobjectinstance.h;h=0ebef2fedf30012e8db4d8bf3b228693b3d1ecfc;hb=7aaec9a70b8d7733429bec043f8e33e02956f266;hp=0000000000000000000000000000000000000000;hpb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;p=libs%2Fgl.git

diff --git a/source/render/objectinstance.h b/source/render/objectinstance.h
new file mode 100644
index 00000000..0ebef2fe
--- /dev/null
+++ b/source/render/objectinstance.h
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+#ifndef MSP_GL_OBJETCINSTANCE_H_
+#define MSP_GL_OBJETCINSTANCE_H_
+
+#include <string>
+#include "object.h"
+#include "placeable.h"
+
+namespace Msp {
+namespace GL {
+
+/**
+Represents a single instance of an Object.  Thanks to being derived from
+Placeable in can be positioned without additional effort.  Other instance
+parameters can be set by overriding the hook functions.
+
+ObjectInstances can benefit from being put in an InstanceScene, which will
+render all instances of the same object consecutively.
+*/
+class ObjectInstance: public PlacedRenderable
+{
+public:
+	class Loader: public DataFile::ObjectLoader<ObjectInstance>
+	{
+	public:
+		Loader(ObjectInstance &);
+
+	private:
+		void transform();
+	};
+
+protected:
+	const Object &object;
+
+public:
+	ObjectInstance(const Object &);
+
+	const Object &get_object() const { return object; }
+	virtual IntPtr get_instance_key() const { return reinterpret_cast<IntPtr>(&object); }
+
+	virtual const Geometry::BoundingSphere<float, 3> *get_bounding_sphere() const { return object.get_bounding_sphere(); }
+
+	virtual void render(Renderer &, const Tag & = Tag()) const;
+
+	/** Hook function, called from Object just before rendering the mesh.
+	Renderer state will have been pushed before this is called. */
+	virtual void setup_render(Renderer &, const Tag &) const;
+
+	/** Hook function, called from Object right after rendering the mesh.  Since
+	Object takes care of pushing Renderer state, this rarely needs to do
+	anything. */
+	virtual void finish_render(Renderer &, const Tag &) const { }
+
+	virtual unsigned get_level_of_detail(const Renderer &) const;
+};
+
+} // namespace GL
+} // namespaec Msp
+
+#endif