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I might be up for doing something quick and gruesome.

No probs. Sorry for posting it in the wrong place (too much booze this Christmas!)...

Any Brits (or anyone else for that matter) might want to take a look at this from time to time:

http://ukscene.untergrund.net/blog/

Ta

W-buffer. I get it, but what is the benefit from doing it in W instead of Z? Maybe since you are doing perspective correct and already interpolating W, you wouldn't need to do it twice for Z too? That's what I can think of..

A w-buffer gives a linear representation of depth, whereas a z-buffer gives a non-linear representation where you get lots of accuracy for z values close to the camera, but you lose accuracy further away from the camera (which is desirable in most cases). I guess that w-buffer would probably work well in combination with perspective texture mapping...

Nice demo btw Optimus. I'm almost tempted to get a Gampark myself now

I'm Pete. Started out on Blitz Basic, and now code in C++ on PC. I've joined here to offer harsh one-word comments and unconstructive criticism.

hiya,

haven't used ptc in a while but if i remember right ptc_update takes an argument of type 'void pointer', so you just need to cast your integer pointer to a void pointer. ie.

ptc_update( (void*)iBuffer );

good luck.