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| Poster | Thread |  pixie
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Re: PTDS (formerly PED81C) - pseudo-native, no C2P chunky screens for AGA
Posted on 10-Feb-2026 9:17:04
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Elite Member
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Joined: 10-Mar-2003
Posts: 3537
From: Figueira da Foz - Portugal | | |
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| @saimo
One of the words that describes how I see the demos of PTDS would be imo, identity. I would love to see games to take advantage of it! Games that I have no doubt wouldn't be possible before can now, and at the same time share one interesting graphic identity amongst themselves _________________
Indigo 3D Lounge, my second home.
The Illusion of Choice | Am*ga |
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| | saimo
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Re: PTDS (formerly PED81C) - pseudo-native, no C2P chunky screens for AGA
Posted on 10-Feb-2026 12:10:14
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Elite Member
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Joined: 11-Mar-2003
Posts: 2528
From: Unknown | | |
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| @pixie
Quote:
| One of the words that describes how I see the demos of PTDS would be imo, identity. I would love to see games to take advantage of it! Games that I have no doubt wouldn't be possible before can now, and at the same time share one interesting graphic identity amongst themselves |
Yep, the technique gives the demos a distinctive look.
I'm still trying to come up with a novel game concept that really exploits PTDS and/or PTDQ and that I can actually make within my skills and life constraints._________________
RETREAM - retro dreams for Amiga, Commodore 64 and PC |
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| | saimo
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Re: PTDS (formerly PED81C) - pseudo-native, no C2P chunky screens for AGA
Posted on 10-Feb-2026 12:14:37
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Elite Member
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Joined: 11-Mar-2003
Posts: 2528
From: Unknown | | |
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| I have just released yet another demo (months ago I had shown a video, but I had not released the program itself):
https://www.youtube.com/watch?v=t7G2gKNQyII
The terrain is rendered by means of perspective-correct, wrap-around texture mapping. The city is rendered by means of solid bitmap zooming. The UFO is rendered by means of zero-keyed bitmap zooming. The screen uses PTDS, is 319x200 dots and employs the RGBWa color model.
On a stock Amiga 1200, the speed varies between 19 and 23 fps. On an Amiga 1200 equipped with a Blizzard 1230 IV mounting a 50 MHz 68030 and 60 ns FAST RAM, the speed varies between 67 and 80 fps. The fps fluctuations depend on the fact that the size of the UFO goes from very small (thus requiring only a few RAM accesses) to very large (requiring a lot of RAM accesses).
Download: https://retream.itch.io/ptds Last edited by saimo on 10-Feb-2026 at 12:40 PM.
Last edited by saimo on 10-Feb-2026 at 12:29 PM.
Last edited by saimo on 10-Feb-2026 at 12:22 PM.
Last edited by saimo on 10-Feb-2026 at 12:20 PM.
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RETREAM - retro dreams for Amiga, Commodore 64 and PC |
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