[Staff][Dev] 3D WireFrame Program

Post by **tr1p1ea** » Thu 30 Dec, 2004 5:33 am

Hi, just to let you guys know that i am still coding, i thought i would post this. Last week i was bored so i whipped up this ... a 3D WireFrame rendering program.

It only renders lines, nothing is filled or anything so dont get too excited ... plus there is need for some optimisation. Anyway here are some screenshots:

Its supposed to be a crude model of an X-Wing Fighter

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Anyway it runs a little better on-calc than in the screen (its definately not as jumpy).

Also this will NOT eventuate into a game or anything, i am really just fooling around a little

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Post by **tr1p1ea** » Thu 30 Dec, 2004 4:25 pm

Oh yes i forgot, you can also try this:

http://users.tpgi.com.au/adslmpxk/Files/wFrame.8xp

Its the crude X-Wing demo

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Post by **Kozak** » Thu 30 Dec, 2004 9:07 pm

I've always liked these 3d demos but yeah it might be unfeasible to transform them into a good game

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Stickmanofdoom · Post by **Stickmanofdoom** » Fri 31 Dec, 2004 1:16 am

Could you post the source code, or at least the math needed to represent a point in 3D space on a 2D screen? I have been wanting to play around with 3D on the calc.

You say it couldn't work for a real game? I would think wireframe graphics would be great for an NBA jam type game. The players could be wireframe stickmen, and the mode-7 style floor used in the real game could be faked with a 3D vector plane.
Perhaps that's demanding a little too much from the 83+? It would be fun to at least try.

Madskillz · Post by **Madskillz** » Fri 31 Dec, 2004 4:11 am

Wow...very cool Tr1p! A neat little demo thingy!

Post by **tr1p1ea** » Sun 02 Jan, 2005 4:04 pm

heh, i dont think it will turn into much more, maybe just a wireframe model viewer

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Also w00t, 100th post! :twisted:

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Calv!n.n0.1 · Post by **Calv!n.n0.1** » Sun 02 Jan, 2005 7:58 pm

Neato tr1p!

shadowing · Post by **shadowing** » Mon 03 Jan, 2005 12:25 am

Whoa... Cool. It's not bad. I'm guessing you used vectors...

Jim e · Post by **Jim e** » Mon 03 Jan, 2005 3:46 am

Stickmanofdoom,
converting 3d croods to 2d is pretty simple.

screen x = ( x * eye) / ( z + eye )
screen y = ( y * eye ) / ( z + eye )

eye is the dist the viewer is from the screen.

teoryn · Post by **teoryn** » Mon 03 Jan, 2005 7:22 am

Very cool. Do models have to have every line hand entered?

Post by **tr1p1ea** » Mon 03 Jan, 2005 8:29 am

Well, atm it will just read an array of values and draw the lines. An example is:

Code: Select all

CubeModel:
   .dw 12               ; Number of lines in model

   .db 10,10,10,-10,10,10         ; x3D1, y3D1, z3D1, x3D2, y3D2, z3D2
   .db -10,10,10,-10,10,-10
   .db -10,10,-10,10,10,-10
   .db 10,10,-10,10,10,10

   .db 10,-10,10,-10,-10,10
   .db -10,-10,10,-10,-10,-10
   .db -10,-10,-10,10,-10,-10
   .db 10,-10,-10,10,-10,10

   .db 10,10,10,10,-10,10
   .db -10,10,10,-10,-10,10
   .db -10,10,-10,-10,-10,-10
   .db 10,10,-10,10,-10,-10

Post by **DarkAuron** » Mon 03 Jan, 2005 9:10 am

Maybe you should make a model editor, tr1p. That'd be awesome.. a 3d modeler on the calc :shock:

Jim e · Post by **Jim e** » Mon 03 Jan, 2005 10:31 am

An on-clac modeler, now that would be some awsome code. That matt 3d designer is kinda tough to work with. I ended up writing 53 lines worth of croods on paper just to make a plane. I think I'll stick cubes till something better comes along.
Man, PAPER, what is this the dark ages, forced to use papyrus. poor trees.

Stickmanofdoom · Post by **Stickmanofdoom** » Mon 03 Jan, 2005 4:37 pm

Thanks for the math, jim e. I'll see what I can do with it.

Duck · Post by **Duck** » Mon 03 Jan, 2005 9:10 pm

Looks nifty. I see the coordinates are 1 byte, that must have eased coding.

Do you know how fast/slow it is against that 3d engine in the making? I think I forgot the name of it.