X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fobjectinstance.h;h=6a8749766f39ca08223c07d8971435c3abe1eebb;hp=5911dae57fb6f173210ea18936a8e353c11c9f54;hb=0807680edd94a7f14560831db4dd52e4e48d0d19;hpb=f14435e58bfa0fa697a06ba9a454bb30cd37d9d8

diff --git a/source/objectinstance.h b/source/objectinstance.h
index 5911dae5..6a874976 100644
--- a/source/objectinstance.h
+++ b/source/objectinstance.h
@@ -2,18 +2,21 @@
 #define MSP_GL_OBJETCINSTANCE_H_
 
 #include <string>
+#include "object.h"
 #include "renderable.h"
 
 namespace Msp {
 namespace GL {
 
-class Object;
 class ProgramData;
 
 /**
-Represents a single instance of an Object.  An application can derive another
-class from this and overload the hook functions to specify location and other
-instance-specific parameters for the rendered objects.
+Represents a single instance of an Object.  A derived class can overload the
+hook functions to specify a model matrix and other instance-specific parameters
+for the rendered objects.
+
+ObjectInstances can benefit from being put in an InstanceScene, which will
+render all instances of the same object consecutively.
 */
 class ObjectInstance: public Renderable
 {
@@ -26,6 +29,8 @@ public:
 	const Object &get_object() const { return object; }
 	virtual long get_instance_key() const { return reinterpret_cast<long>(&object); }
 
+	virtual const Geometry::BoundingSphere<float, 3> *get_bounding_sphere() const { return object.get_bounding_sphere(); }
+
 	virtual void render(const Tag &tag = Tag()) const;
 	virtual void render(Renderer &, const Tag & = Tag()) const;
 
@@ -38,7 +43,7 @@ public:
 	anything. */
 	virtual void finish_render(Renderer &, const Tag &) const { }
 
-	virtual unsigned get_level_of_detail() const { return 0; }
+	virtual unsigned get_level_of_detail(const Renderer &) const { return 0; }
 };
 
 } // namespace GL