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New demo uploaded: 3d wire frame animated spaceship
Posted: Mon Sep 07, 2020 2:00 am
by desertfish
3d wire frame animated spaceship
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3d animated Cobra MK3 ship from Elite! Uses 16 bits integer math and has hidden-line removal..
This is an almost 1-to-1 conversion of the same program I wrote for the C64, but it runs a lot faster on the CommanderX16
? Here is the (prog8) source code
https://github.com/irmen/prog8/blob/master/examples/cx16/cobramk3-gfx.p8 I haven't figured out how to wait for the Vertical blank yet, to reduce the flickering perhaps...
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09/07/20
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New demo uploaded: 3d wire frame animated spaceship
Posted: Mon Sep 07, 2020 6:33 am
by AndyMt
Oh nice! I can already see something like "Elite" coming...
New demo uploaded: 3d wire frame animated spaceship
Posted: Mon Sep 07, 2020 8:04 am
by desertfish
Ok you put me on a mission
? I now have to at least put all Elite's ship models into that program
https://www.c64-wiki.com/wiki/Elite#Spaceship_types And we also have text mode Elite
http://www.elitehomepage.org/text/index.htm So who knows
? edit: Right, that same site hosts various 3d model source files of the Elite shipts. I cobbled up a quick model viewer in Python.... Going to use that to convert the data into binary arrays that I can read into my 6502 program !
New demo uploaded: 3d wire frame animated spaceship
Posted: Wed Sep 09, 2020 11:46 pm
by desertfish
Yay, the exported ship data works in the Commander X16 version! Attempt for the next version to implement hidden line removal in this version too.
New demo uploaded: 3d wire frame animated spaceship
Posted: Thu Sep 10, 2020 8:05 am
by Cyber
Wow! Are you serious about Elite?
New demo uploaded: 3d wire frame animated spaceship
Posted: Thu Sep 10, 2020 9:47 am
by desertfish
Nah, I'm not going to recreate Elite, the game. That would be way too much work. The 3d code is not a full 3d engine but just capable of showing one spinning object in the center of the screen ? I'm not going to expand that. I do want to add hidden line removal to it though and the other dozen or so ship models. As a separate project maybe to compile or convert that text-mode Elite trading program. That should be doable and will result in a fun little space trading game program (without fancy graphics though)
New demo uploaded: 3d wire frame animated spaceship
Posted: Sun Sep 13, 2020 3:57 am
by Cyber
I see. You can add spinning 3D ships to the same project as an encyclopedia entries.
New demo uploaded: 3d wire frame animated spaceship
Posted: Mon Sep 14, 2020 11:00 pm
by Nickenstein
Awesome! ?
I'm new here, and I don't have time to experiment until the weekend, but something I wanted to try was making a fixed-point math library with some vector-matrix-mult routines. I think you have beaten me to the punch on that! ?
New demo uploaded: 3d wire frame animated spaceship
Posted: Tue Sep 15, 2020 12:47 am
by desertfish
For this program I am not using a fixed point math library perse. The math library that I use only has primitives for calculations on byte and word values.
The program (written in prog8) does the actual 3d calculations taking fixed-point scaling into account. So a hand written math library with 3d routines as well is still useful as it will be quite a bit faster that my generated assembly code I can imagine.
New demo uploaded: 3d wire frame animated spaceship
Posted: Wed Sep 16, 2020 9:30 pm
by desertfish
Slight update, I'm slowly working towards adding that hidden line removal. The actual math required isn't in there yet but I think I have the ship model data complete for it.
Also I've looked at the source code of the text-Elite and it seems a lot more work to convert it to Prog8 than I anticipated. It is still something I would like to complete though, if only to validate the practical applicability of the language.
