CompuServe Messages

>> If I remember correctly the polygon fill doesn't use the blitter line >> draw which might speed the process up on a slower machine. It doesn't use it, so that might help on an A500…but my A4000…. <g> >> Don't forget of course that you won't just be drawing polygons anyway. Well, yeah — but if I can't get more than 80 or 160/sec by concentrating 100% on drawing anyway, I won't even get that close when running the other parts of the program too. I did notice that the program in the book is constantly waiting for the blitter before proceeding. With two image buffers, blitting one while outlining the other is possible — but then, we have to wait for the blitter to finish so we can clear the buffer, unless we devote CPU time to clearing it. >> …you could draw the polygon by calculating both sides using two >> bresenham lines each side and filling between the two points. That may >> be a quicker way, whether after drawing the polygon in one plane you >> would use the blitter to copy to the other blitplanes…. Isn't that what the book does? >> Doing chunky to bitplane conversions of the whole screen may not be >> optimal If you have a fast good hidden surface removal. I was thinking more along the lines of letting the '040 do all the polygon drawing work when I said that. It's much faster than even the AA blitter, especially in fast RAM. It would also be able to do things like texture- mapping better. >> (If only it was easy) <g> And if only I had more time to play with it. >> (did it really have self modifying code, I don't remember seeing any) I didn't really notice anything either; it just doesn't run right with caches on. >> How fast does the ROM version go when running without AGA or caches? Um…couldn't make it run like that. <g> The version from the book runs slower on the A500 than on the A4000, though. >> What you want to do is talk to Jez San who did Starglider II and the >> mario chip (Can't remember the offical name) for StarWing/StarFox on the >> Super Nintendo. Now why didn't I think of that…Jez is here on CIS. He checks into the Vidgames forum from time to time. Maybe I'll send him an E-mail. (That chip is the FX Chip, BTW. 😉 – Jim, on AP!