You can do this with a single accumulating bitmap. 1. Create a bitmap the size of your view filled with the background color 2. Fill the bitmap with the background color using an alpha = 1 / number of steps 3. Draw the radar onto the bitmap 4. Draw the bitmap in the view 5. Go to step 2
(I have done this exact thing on Win32, but not Cocoa so buyer beware). _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
