Hello,
I'm playing around with the GLPaint Example from Apple.
GLPaint
But I don't know how to create an effect which fades the already drawn stuff out. I created an example in Flash which shows the effect I'm looking for:
Flash Example
In Flash I'm drawing a texture on a BitmapData and in every frame I'm adding a ColorTransform to the BitmapData which fades out the old drawn data.
I guess there must be a similar solution in openGL. Something with the renderBuffer or frameBuffer but I didn't find any solution.
Do you have an idea, tip, hint?
Thank you, Raphael
