X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fobject.h;h=95ba8fabc5d746bb3b41453632b340dea7673f74;hp=f432177e7ebfd7cb221491d58ce35543af66f989;hb=5b532dcb2a4a2d15d0b6607374284c979ece36a8;hpb=508319df28270eccdfa03a880a8604549278a139

diff --git a/source/object.h b/source/object.h
index f432177e..95ba8fab 100644
--- a/source/object.h
+++ b/source/object.h
@@ -23,11 +23,34 @@ define which render passes the Object supports.
 In many cases, it's desirable to include multiple copies of an Object in a
 Scene, with different model matrices.  ObjectInstances can be used to alter the
 rendering of an object on a per-instance basis.
+
+Objects can have multiple levels of detail.  The most detailed level has index
+0, with increasing indices having less detail.  When rendering an instance, the
+instance's get_level_of_detail method is called to determine which LoD to use.
 */
 class Object: public Renderable, private ResourceWatcher
 {
+private:
+	struct LevelOfDetail;
+
+	class LodLoader: public DataFile::CollectionObjectLoader<Object>
+	{
+	private:
+		unsigned index;
+		LevelOfDetail &lod;
+
+	public:
+		LodLoader(Object &, unsigned, Collection *);
+
+	private:
+		void mesh(const std::string &);
+		void mesh_inline();
+		void technique(const std::string &);
+		void technique_inline();
+	};
+
 public:
-	class Loader: public DataFile::CollectionObjectLoader<Object>
+	class Loader: public LodLoader
 	{
 	public:
 		Loader(Object &);
@@ -36,17 +59,17 @@ public:
 		void init();
 		virtual void finish();
 
-		void mesh_inline();
-		void mesh_inline_lod(unsigned);
-		void mesh(const std::string &);
-		void mesh_lod(unsigned, const std::string &);
-		void technique_inline();
-		void technique(const std::string &);
+		void level_of_detail(unsigned);
 	};
 
 private:
-	std::vector<RefPtr<const Mesh> > meshes;
-	RefPtr<const Technique> technique;
+	struct LevelOfDetail
+	{
+		RefPtr<const Mesh> mesh;
+		RefPtr<const Technique> technique;
+	};
+
+	std::vector<LevelOfDetail> lods;
 	Geometry::BoundingSphere<float, 3> bounding_sphere;
 
 public:
@@ -54,14 +77,30 @@ public:
 	Object(const Mesh *, const Technique *);
 	~Object();
 
+private:
+	LevelOfDetail &get_lod(unsigned, const char *);
+
+public:
+	/** Sets the mesh for the highest level of detail (index 0). */
 	void set_mesh(const Mesh *m) { set_mesh(0, m); }
+
+	/** Sets the mesh for a given level of detail.  Previous LoDs must have been
+	defined. */
 	void set_mesh(unsigned, const Mesh *);
+
 private:
 	void update_bounding_sphere();
 public:
 	const Mesh *get_mesh(unsigned = 0) const;
-	void set_technique(const Technique *);
-	const Technique *get_technique() const { return technique.get(); }
+
+	/** Sets the technique for the highest level of detail (index 0). */
+	void set_technique(const Technique *t) { set_technique(0, t); }
+
+	/** Sets the technique for a given level of detail.  Previous LoDs must have
+	been defined. */
+	void set_technique(unsigned, const Technique *);
+
+	const Technique *get_technique(unsigned = 0) const;
 
 	virtual const Geometry::BoundingSphere<float, 3> *get_bounding_sphere() const { return &bounding_sphere; }
 
@@ -78,7 +117,7 @@ protected:
 	virtual void finish_render(Renderer &, const Tag &) const { }
 
 private:
-	const RenderPass *get_pass(const Tag &) const;
+	const RenderPass *get_pass(const Tag &, unsigned) const;
 
 	virtual void resource_loaded(Resource &);
 };