X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Frenderable.h;h=6e1505ca5a728c0ac1b012eb797cf00c84321ff4;hp=18319cb4595a398aa362c70d583e8ec37665702b;hb=944deb38084e5e5bc82182faab2db2be156b971c;hpb=dafd3a42a2f06bfd8e88f9240fc2f4bd3d401541

diff --git a/source/renderable.h b/source/renderable.h
index 18319cb4..6e1505ca 100644
--- a/source/renderable.h
+++ b/source/renderable.h
@@ -15,8 +15,9 @@ class Renderer;
 Base class for renderable objects.  Rendering is performed with the help of a
 Renderer object.
 
-The render methods take a Tag to identify a render pass.  It is most commonly
-used together with Techniques and Pipelines to implement multipass rendering.
+The render method takes a Tag to identify a render pass.  It can be used with
+a Technique to select alternative rendering methods, such as simplified shaders
+for a depth-only shadow pass.
 
 The setup_frame and finish_frame methods provide a mechanism for performing
 once-per-frame operations.  This is most useful for effects, which may need to
@@ -36,7 +37,8 @@ public:
 	virtual long get_instance_key() const { return 0; }
 
 	/** Returns the model matrix of the Renderable.  Null is returned if no such
-	matrix exists. */
+	matrix exists.  The matrix should be in world space for some effects to work
+	correctly. */
 	virtual const Matrix *get_matrix() const { return 0; }
 
 	/** Returns a bounding sphere that completely encloses the Renderable.  The
@@ -45,10 +47,10 @@ public:
 	virtual const Geometry::BoundingSphere<float, 3> *get_bounding_sphere() const { return 0; }
 
 	/** Called when starting to render a new frame. */
-	virtual void setup_frame() const { }
+	virtual void setup_frame(Renderer &) { }
 
 	/** Called when a complete frame has been rendered. */
-	virtual void finish_frame() const { }
+	virtual void finish_frame() { }
 
 	/** Renders the Renderable.  Implementors should take care to return the
 	renderer to the state it was in, for example by using Renderer::Push. */