diff -r 4c8abb8977dc -r ca7d4c665531 include/shapes.h
--- a/include/shapes.h	Thu May 08 09:21:25 2008 +0200
+++ b/include/shapes.h	Sat May 10 14:29:37 2008 +0200
@@ -86,7 +86,7 @@
 /**
  * list of shapes
  */
-typedef vector<Shape*> ShapeList;
+typedef vector<const Shape*> ShapeList;
 
 /**
  * sphere shape