| From: | Jesper Svennevid |
| Date: | 13 Aug 2001 at 16:22:33 |
| Subject: | RE: [amiga-c] Re: isometric gfx engine |
> The easiest way, like Andrew said would be to draw everything from back
> to front, but IMO that would be wasteful if you have lots of objects
> which would obscure things (e.g. buildings in Syndicate). There must be
> some trick to it for the speed. Syndicate flies on my 060, and I can't
> remember how fast UFO is, but I know it's a bit slower (although
> Syndicate only has 8 or 16 colours). But even on the 020, Syndicate was
> always a lot faster than UFO.
I've implemented a isometric engine in a game (not released yet, and pc
make things worse. :) )
You almost never render the entire screen-area, as this takes too much
time. To get good performance, you combine using a circle-buffer (rotating
buffer that allows you to scroll screen-areas internally without moving any
data physically ) and restore-rectangles that clip the output to make sure
you don't draw more than you need. If done correctly, the result should
fly.
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