Doom 3 engine release and game code

[revelator]

Hmm i seem to have found atleast part of the performance problem, it seems to be related to entity triggers as the game lags somewhat whenever i trigger one.
Strange i didnt touch that code as far as i know :S but maybe its caused by something i done elsewhere ?

I also noticed that sometimes moving close to a wall the viewport gets all screwy and tries to drag the edge of the wall along with me as i move

[revelator]

Oh hell well the rendering problem is a driver bug in 306.97 still trying to figure out what makes entity triggers lag the game like theres no tomorrow.

[mh]

BFG Edition GPL code is out: https://github.com/id-Software/DOOM-3-BFG

[revelator]

nice one, you pulling an all niter mh

[revelator]

Short look we where wrong the changes are huge no idlib anymore, the renderer looks nothing like the old one either and the vertexcache was totally rewritten.
Edit: idlib is there just overlooked it since the project looks a bit alien compared to the old GPL release.

[mh]

Fixed the missing muzzleflash lights. In R_AddSingleLight (tr_frontend_addlights.cpp) - this nasty block of code needs to die:

Code: Select all

         // We don't want the lights on weapons to illuminate anything else.
         // There are two assumptions here -- that allowLightInViewID is only
         // used for weapon lights, and that all weapons will have weaponDepthHack.
         // A more general solution would be to have an allowLightOnEntityID field.
         // HACK: the armor-mounted flashlight is a private spot light, which is probably
         // wrong -- you would expect to see them in multiplayer.
         if ( light->parms.allowLightInViewID && light->parms.pointLight && !eParms.weaponDepthHack ) {
            continue;
         }

[revelator]

Nice one thing we might have to fix also is the missing bink interaction since it seems id used bink for ingame videos none of the terminals showing videos ingame work anymore.
Ill see if i can find an opensource alternative that can play bink videos.

[revelator]

Hmm ffmpeg can open bink or bik files though im not sure which codec it uses.
Edit found it its libavcodec now we just need an interface since id have removed most of that part as well.

They also removed libfreespace which im a bit curious about since that library is LGPL2 ? its not propriarity it seems.

[mh]

Interestingly, the shaders are included with this source release - base/renderprogs.

[revelator]

Aye and the backend is a real beauty damn nice coding there.
Edit: just noticed there backend can convert cg to glsl at runtime

[revelator]

// Determine whether or not the shadow volume needs to be rendered with Z-pass or
// Z-fail. It is worthwhile to spend significant resources to reduce the number of
// cases where shadow volumes need to be rendered with Z-fail because Z-fail
// rendering can be significantly slower even on today's hardware. For instance,
// on NVIDIA hardware Z-fail rendering causes the Z-Cull to be used in reverse:
// Z-near becomes Z-far (trivial accept becomes trivial reject). Using the Z-Cull
// in reverse is far less efficient because the Z-Cull only stores Z-near per 16x16
// pixels while the Z-far is stored per 4x2 pixels. (The Z-near coallesce buffer
// which has 4x4 granularity is only used when updating the depth which is not the
// case for shadow volumes.) Note that it is also important to NOT use a Z-Cull
// reconstruct because that would clear the Z-near of the Z-Cull which results in
// no trivial rejection for Z-fail stencil shadow rendering.

const bool renderZPass = ( drawSurf->renderZFail == 0 ) || r_forceZPassStencilShadows.GetBool();

Code: Select all

      if ( renderZPass ) {
         // Z-pass
         qglStencilOpSeparate( GL_FRONT, GL_KEEP, GL_KEEP, GL_INCR );
         qglStencilOpSeparate( GL_BACK, GL_KEEP, GL_KEEP, GL_DECR );
      } else if ( r_useStencilShadowPreload.GetBool() ) {
         // preload + Z-pass
         qglStencilOpSeparate( GL_FRONT, GL_KEEP, GL_DECR, GL_DECR );
         qglStencilOpSeparate( GL_BACK, GL_KEEP, GL_INCR, GL_INCR );
      } else {
         // Z-fail removed
      }

heh seems id took the bat to it in this as well

[hogsy]

How exciting! Will have to check this out when I get home.

[revelator]

Small whoops on there part it seems one of the changes they had to make to make the source GPL broke the old Doom games that come with it, selecting them from the menu now crashes the engine :S

[Barnes]

Code: Select all

if ( renderZPass ) {
         // Z-pass
         qglStencilOpSeparate( GL_FRONT, GL_KEEP, GL_KEEP, GL_INCR );
         qglStencilOpSeparate( GL_BACK, GL_KEEP, GL_KEEP, GL_DECR );
      } else if ( r_useStencilShadowPreload.GetBool() ) {
         // preload + Z-pass
         qglStencilOpSeparate( GL_FRONT, GL_KEEP, GL_DECR, GL_DECR );
         qglStencilOpSeparate( GL_BACK, GL_KEEP, GL_INCR, GL_INCR );
      } else {
         // Z-fail removed and restored  :D
   qglStencilOpSeparate(GL_FRONT, GL_KEEP, GL_DECR, GL_KEEP);    
        qglStencilOpSeparate(GL_BACK, GL_KEEP,  GL_INCR, GL_KEEP);
     
}

[Spirit]

Edit found it its libavcodec

There is a lot of drama around this, make sure you are looking at the correct sources: http://blog.pkh.me/p/13-the-ffmpeg-libav-situation.html