maybe SDL_gfx has gotten a fix for something like that at some point? http://www.ferzkopp.net/joomla/content/view/19/14/
isn't aaline source cribbed from SDL_gfx? On Mon, Apr 7, 2008 at 1:54 PM, Marcus von Appen <[EMAIL PROTECTED]> wrote: > On, Mon Apr 07, 2008, Lenard Lindstrom wrote: > > > Forget that last observation. The traceback doesn't show the arguments > > correctly. I have traced the problem to clipaaline. When pts[0] is 0 and > > pts[2] is 1 or pts[1] is 0 and pts[3] is 1 it copies pts[2] and pts[3] to > > pts[0] and pts[1]. This causes a divided by 0.0 later in drawaaline which > > leads to a memory access problem. It doesn't matter if the surface is 24 or > > 32 bit. > > [...] > That's the same I figured out half an hour ago :-). It's the > Cohen-Sutherland clipping line implementation with slight adaptions and > works well for normal pixel lines. I'm currently looking into the aaline > clipping implementation and try to find a matching fix that takes the AA > into account _and_ still provides a more or less reasonable result for > those cases. > > Regards > Marcus >
