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Atari demoscene BBS
| Re: Doom floor texturing |
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Posted by: dml
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Jan,23.2013-18:01
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Well it looks like I didn't remember my facts very clearly about memory usage in the DSP doom engine. There is a nasty P:INT and Y:EXT overlap which needs to be watched so I was always moving things around and shaving to keep the internal buffers internal not to spill into program space...
But as for the rest of the EXT memory - I did a small test filling the DSP with marker words ($AAAAAA) and ran around Doom level 1 @ 320x200 to see how big the spanbuffers got in X: and Y:, and it turned out only to be about 6k each. So there is probably a reliable 8k free at the top of X: and Y: as it is without refactoring any code.
So I can probably cache 4 truecolour floor textures in there @ 64x64! Or twice that many if stored 12bit but it's probably not worth messing with that.
Definitely need to try this :) Will start with a stub that just transfers a dummy texture at the appropriate time and then serves a flat colour from the host port and do some speed comparisons with that. If it looks promising I can then do the DSP bit properly.
Thanks again
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Topic
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Posted by
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Date
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Doom floor texturing
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dml
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Jan,21.2013-18:47
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Re: Doom floor texturing
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dml
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Jan,21.2013-18:48
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Re: Doom floor texturing
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dml
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Jan,21.2013-21:33
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Re: Doom floor texturing
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Defjam
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Jan,21.2013-21:44
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Re: Doom floor texturing
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dml
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Jan,21.2013-22:38
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Re: Doom floor texturing
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dml
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Jan,22.2013-10:48
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Re: Doom floor texturing
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mikro
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Jan,22.2013-11:03
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Re: Doom floor texturing
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dml
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Jan,22.2013-11:43
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Re: Doom floor texturing
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mikro
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Jan,22.2013-13:30
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Re: Doom floor texturing
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mikro
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Jan,22.2013-13:36
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Re: Doom floor texturing
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mikro
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Jan,22.2013-13:37
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Re: Doom floor texturing
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dml
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Jan,22.2013-15:18
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Re: Doom floor texturing
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mikro
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Jan,22.2013-16:22
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Re: Doom floor texturing
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dml
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Jan,23.2013-00:55
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Re: Doom floor texturing
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mikro
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Jan,23.2013-10:12
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Re: Doom floor texturing
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dml
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Jan,23.2013-13:00
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Re: Doom floor texturing
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Calimero
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Jan,24.2013-03:14
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Re: Doom floor texturing
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ggn
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Jan,22.2013-16:41
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Re: Doom floor texturing
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ggn
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Jan,22.2013-16:42
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Re: Doom floor texturing
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dml
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Jan,23.2013-01:07
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Re: Doom floor texturing
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dml
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Feb,03.2013-20:23
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Re: Doom floor texturing
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mikro
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Feb,03.2013-22:07
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Re: Doom floor texturing
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dml
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Jan,23.2013-18:01
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Re: Doom floor texturing
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mikro
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Jan,23.2013-23:39
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What's the anti-troll code?
That's your personal code to be able to add comments and messages on the dhs.nu site.
Don't have a code or forgot it? Fix it here.
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