http://www.google.com/codesearch/p?hl=en#IgfHeG9Bf1I/trunk/Oolong%20Engine2/Examples/Renderer/Ported%20PowerVR%20Examples/11%20Skybox2/Delegate.mm&q=delegate%20package:http://oolongengine%5C.googlecode%5C.com&sa=N&cd=9&ct=rc