samples/turtle/tree.rb in ray-0.1.0.pre1 vs samples/turtle/tree.rb in ray-0.1.0

@@ -39,18 +39,23 @@
   register do
     add_hook :quit, method(:exit!)
   end
 
   scene :tree do
+    tree = Ray::Image.new window.size
+    tree.turtle do
+      pen_up
+      left 90
+      center
+      backward 180
+      pen_down
+      tree(240.0)
+    end
+
+    @sprite = sprite tree
+
     render do |win|
-      win.fill(Ray::Color.black).turtle do
-        pen_up
-        left 90
-        center
-        backward 180
-        pen_down
-        tree(240.0)
-      end
+      win.draw @sprite
     end
   end
 
   push_scene :tree
 end