Hello there. I'm fairly new to processing (but not programming) and I'm working on a little drawing tool. I'm not sure if I'm doing something wrong or if I came across a bug. I didn't find any similar request on the internet, so I'm asking this here.
In this little drawing tool I'm essentially spawning moving particles, drawn as ellipses, that behave in some way or another. Now I want to see the traces of these Particles, therefore I don't call the background()-function to repaint the canvas. This works fine with the P2D-Renderer, but as soon as I switch to OpenGL, the background gets repainted every time draw() is called.
Is there something special to do to make this work? Is this normal behaviour? The only difference between using these renderers in my code are the call to size() so far. I'm working on a MacBookPro from 2007, I think, with a 2.33GHz Intel Core 2 Duo and an ATI Radeon X1600. The processing version is 1.2.1 and OSX Version is 10.6.
