There was a post a few days ago (about ProgressTimer) where I showed a concept of doing a radial effect to show some progress loading. The class also has the functionality of doing horizontal and vertical progress loading bars as well.
Well Ricardo mentioned that the effect would work for scene transitions gave me some hints on how to attempt it.
It's a cool idea! So I've reworked the ProgressTimer now into CCProgressTimer which is now more efficient in its update routine and plugged it into two Scene transition effects.
CCRadialCCWTransition - A counter clock-wise transition from a scene and
CCRadialCWTransition - A clockwise transition to the next scene
It follows the same cocos2d convention for running scene transition effects and so I hope it is easy to use.
Try out the demo and hopefully everyone can give me suggestions and improvements to the class.
