bolter@unc.cs.unc.edu (Jay D. Bolter) (09/23/90)
I would like to be able duplicate in my own programs the visual dissolve effect in Hypercard. That is, I would like to make the pixels of a window change quickly and randomly from one image to a new image. This trick was discussed a few months ago on the net. I believe the suggestion was to draw the new image offscreen and then call copybits repeatedly with a suitable mask that changes with each call. Can anyone provide me with the details (in particular how do you create and update the mask?), or with a pointer to an article on this subject?