Add a method of getting the model matrix of a Renderable

[libs/gl.git] / source / effect.h

diff --git a/source/effect.h b/source/effect.h
index dfb369614c28c2388b1dcdd249e20e4d331224ec..7c943ae6ef297f2a80cef9fc8d640fedd19b721e 100644 (file)
--- a/source/effect.h
+++ b/source/effect.h
@@ -9,7 +9,8 @@ namespace GL {
 
 /**
 Effects are used to wrap other renderables and give them additional visual
-properties.
+properties.  An Effect's render method should set up the necessary state, call
+the wrapped Renderable's render method, and clean up after itself.
 */
 class Effect: public Renderable
 {
@@ -23,6 +24,8 @@ public:
 
        void enable_for_pass(const Tag &);
        void disable_for_pass(const Tag &);
+
+       virtual const Matrix *get_matrix() const { return renderable.get_matrix(); }
 };
 
 } // namespace GL