View Full Version : how to do edge detection?
I drew several rect one on top of another, and i want to do something to the topmost rect. How do I detect the edges of the topmost rect in the scene? I need to make a part of this rect transparent.
12-22-2003, 12:45 AM
Not sure what you are trying to do here, once something is rendered you cannot change it, you simple redraw the scene again with the modified look.
does that mean i cannot read in the pixels from the scene and do something to it? I have an appplication using user interaction and on button click, depending on which is the topmost layer, I want to make that part transparent, that is what i wan to do.
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