Re: [cc65] Re: TGI summary (Atari update)

From: Oliver Schmidt <ol.sc1web.de>
Date: 2009-10-26 23:53:25
Hi Fatih,

> * A "tgitest.c" which tests some tgi features that actually helped me catching
>  a couple of bugs. It runs with c64 too. I don't see any reason that would prevent
>  it from running in other platforms.

If you want you can send me the source and I'll test it on the Apple2
beforehand.

> * I wrote a circle algorithm from scratch. Because the one I took from the APPLE
>  driver (which is, by the way, not the same as c64)

Sorry for the wrong info, it's the same as C128, not C64 :-(

>  was sometimes leaving gaps
>  on the circle and I couldn't manage to debug it. Can someone confirm that on the
>  APPLE side? Or did I mess something up when I was porting?

I see a few pixel missing in each diagonal on large circles. Basically
the routine stops somewhat too soon. Are you refering to this effect?
It's already present in the C128 driver(s) :-(

> What about tgidemo? It _does_ change the palette but still uses COLOR_BLACK
> and COLOR_WHITE that prevents Atari drivers to work out of the box which is
> kind of frustrating.

Do I miss the point? I thought we agreed that COLOR_BLACK and
COLOR_WHITE have to be 0 and 1 for monochrome drivers ?!? I don't
understand what could prevent a driver from working if that
prerequisite holds true. Maybe the colors actually displayed are ugly
and/or low contrast but the driver should work...

> * At least one more driver with 2 pages. I want to try 3dmaze with double buffering.
>  (The original version btw, was somewhat working but not any more - clipping issues -).

I just sent you a 3dmaze source with double buffering and not relying
on clipping.

Best, Oliver
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Received on Mon Oct 26 23:53:31 2009

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