Hi! Where can I get more information about the technology used in DOOM?

I don''t know if id has released the source for Doom. But you might check out the (now) open source for Wolfenstein3d or Quake.



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DOOM source has been released, but for Linux only (due to licensing problems). This should contain all the info you need.
There are also loads of DOOM FAQ sites around the web if you search.

Yeah, sound engine wasn''t id''s.

Thank god of DirectSound.

quote: Original post by DefaultUser

Hi! Where can I get more information about the technology used in DOOM?

Well, ID used a raycasting engine - albeit an incredibley (for it''s time ) advanced one. They also used raycasting for Wolf3D, which shows an example of much simpler and easier to understand raycasting... there''s also a great webpage where I learned how to build my own caster (and have done - raycasting''s very cool )... what was it again... hmmm... ah yes...

here we go

Forgive me if that doesn''t show up properly, my html skills are rusty...

Oh, one last thing. Raycasting != Raytracing. Just had to make that clear (some people get them confused).

Cheers all,



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now, do u mean the old doom tech or the new stuff?

lamothe wrote almost a whole book on that techinque... the original Tricks of the Game Programming Gururs.

or do u mean the NEW doom3 technology?

i dunno ''bout that


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Wolfenstein, doom, quake source code (and some other stuff).

I did an short text on this a long was back. Try ''Doom'' and "DigitalFX" or "Digital FX". I think I used ATT Worldnet at the time. Usenet, so try dejanews. Last year I found it, in about 2 minutes. I''d hate to post it up here and get flamed all to shit!

Doom used polygons and a 2D BSP tree to do the rendering but
used sprites for the ingame enemies and such like.

The first Duke Nukem 3D though actually used a modified sort of raycasting or heightcasting engine to achieve more or less the
same effect.

One day they will build 3D cards that do true voxel processing and then the polygon count issue will be dead and buried

But they cost a few million dollars right now so it could take some time.

quote:
Oh, one last thing. Raycasting != Raytracing. Just had to make that clear (some people get them confused).

Hmmmm...so what is the difference besides the name?

Raycasting - shooting out a ray from some starting point until
it collides with something.
Raytracing - same thing?