Doom 3 engine release and game code

[revelator]

Not using pom myself i use the offset limited one and agree better versions exist now.

[Barnes]

Not using pom myself i use the offset limited one and agree better versions exist now.

my relief mapping shader with texture lod (hi speed)

enginge uniforms

Code: Select all

   
                       if(!image->parallaxScale){
         scale[0] = r_parallaxScale->value / image->width;
         scale[1] = r_parallaxScale->value / image->height;
         }
         else
         {
         scale[0] = image->parallaxScale / image->width;
         scale[1] = image->parallaxScale / image->height;
         }
         qglUniform2f(qglGetUniformLocation(id, "u_parallaxScale"), scale[0], scale[1]);
         qglUniform2f(qglGetUniformLocation(id, "u_texSize"), image->upload_width, image->upload_height);


Code: Select all

uniform vec2         u_parallaxScale; // parallax height / tex size
uniform vec2         u_texSize; // current texture size

float ComputeLOD( vec2 tc, vec2 texSize ) {

 vec2 dx = dFdx( tc );
 vec2 dy = dFdy( tc );

 vec2 mag = ( abs( dx )  + abs( dy )  ) * texSize;
 
 float lod = log2( max( mag.x, mag.y ) );

 return lod;

}

vec2 CalcParallaxOffset (in sampler2D hiMap, in vec2 texCoord, in vec3 viewVec) {

   float lod = ComputeLOD(texCoord, u_texSize);
   vec3 offsetVector = vec3(viewVec.xy * u_parallaxScale * vec2(-1, -1), -1);
   vec3 offsetBest = vec3(texCoord, 1);
   offsetVector *= 0.1;

   offsetBest += offsetVector *  step(texture2DLod(hiMap, offsetBest.xy, lod).a, offsetBest.z);
   offsetBest += offsetVector *  step(texture2DLod(hiMap, offsetBest.xy, lod).a, offsetBest.z);
   offsetBest += offsetVector *  step(texture2DLod(hiMap, offsetBest.xy, lod).a, offsetBest.z);
   offsetBest += offsetVector *  step(texture2DLod(hiMap, offsetBest.xy, lod).a, offsetBest.z);
   offsetBest += offsetVector *  step(texture2DLod(hiMap, offsetBest.xy, lod).a, offsetBest.z);
   offsetBest += offsetVector *  step(texture2DLod(hiMap, offsetBest.xy, lod).a, offsetBest.z);
   offsetBest += offsetVector *  step(texture2DLod(hiMap, offsetBest.xy, lod).a, offsetBest.z);
   offsetBest += offsetVector *  step(texture2DLod(hiMap, offsetBest.xy, lod).a, offsetBest.z);
   offsetBest += offsetVector *  step(texture2DLod(hiMap, offsetBest.xy, lod).a, offsetBest.z);
   offsetBest += offsetVector * (step(texture2DLod(hiMap, offsetBest.xy, lod).a, offsetBest.z)          - 0.5);
   offsetBest += offsetVector * (step(texture2DLod(hiMap, offsetBest.xy, lod).a, offsetBest.z) * 0.5    - 0.25);
   offsetBest += offsetVector * (step(texture2DLod(hiMap, offsetBest.xy, lod).a, offsetBest.z) * 0.25   - 0.125);
   offsetBest += offsetVector * (step(texture2DLod(hiMap, offsetBest.xy, lod).a, offsetBest.z) * 0.125  - 0.0625);
   offsetBest += offsetVector * (step(texture2DLod(hiMap, offsetBest.xy, lod).a, offsetBest.z) * 0.0625 - 0.03125);
   
   return offsetBest.xy;
   
   }

[revelator]

Thanks barnes

Hmm its the same ?

if(!image->parallaxScale){
scale[0] = r_parallaxScale->value / image->width;
scale[1] = r_parallaxScale->value / image->height;
}
else
{
scale[0] = image->parallaxScale / image->width;
scale[1] = image->parallaxScale / image->height;
}

oversight ?

[motorsep]

@reckless: http://http.developer.nvidia.com/GPUGem ... _ch18.html might be useful

[Barnes]

Thanks barnes

Hmm its the same ?

if(!image->parallaxScale){
scale[0] = r_parallaxScale->value / image->width;
scale[1] = r_parallaxScale->value / image->height;
}
else
{
scale[0] = image->parallaxScale / image->width;
scale[1] = image->parallaxScale / image->height;
}

oversight ?

no
check for texture properties (simple material definition)

[revelator]

I See now sorry was damn tired so didnt notice the cvar.

@motorsep everything helps

News implemented depthrender path in material properties, should make it possible to do things like real cellshading soft particles etc.
SSAO still a nogo (well sikks shader works but looks wery odd in places with heathaze skyboxes etc. It seems to be related to Doom3's infinite viewmatrix according to Sikkpin.
It looks well and ok on normal surfaces but creates dark outlines of the generated images for heathaze (will probably be better to make it a material effect so it only goes on specified surfaces and not everything).
Commented on Sikkpins experimental engine cause it crashes for me so im implementing his new features one at a time.
One of his changes include moving the cubemaps out of the doom3 code and into the shaders. He also condensed the vertex shader path to use single light color for both diffuse and specular.

the more code savory can see some of it here.

Code: Select all

void RB_ARB2_DrawInteraction( const drawInteraction_t *din ) {
   // load all the vertex program parameters

// ---> sikk - Included non-power-of-two/frag position conversion
   // screen power of two correction factor, assuming the copy to _currentRender
   // also copied an extra row and column for the bilerp
   float parm[ 4 ];
   int w = backEnd.viewDef->viewport.x2 - backEnd.viewDef->viewport.x1 + 1;
   int h = backEnd.viewDef->viewport.y2 - backEnd.viewDef->viewport.y1 + 1;
   parm[0] = (float)w / globalImages->currentRenderImage->uploadWidth;
   parm[1] = (float)h / globalImages->currentRenderImage->uploadHeight;
   parm[2] = parm[0] / w;   // sikk - added - one less fragment shader instruction
   parm[3] = parm[1] / h;   // sikk - added - one less fragment shader instruction
   qglProgramEnvParameter4fvARB( GL_FRAGMENT_PROGRAM_ARB, PP_NPOT_ADJUST, parm );

   // window coord to 0.0 to 1.0 conversion
   parm[0] = 1.0 / w;
   parm[1] = 1.0 / h;
   parm[2] = w;   // sikk - added - can be useful to have resolution size in shader
   parm[3] = h;   // sikk - added - can be useful to have resolution size in shader
   qglProgramEnvParameter4fvARB( GL_FRAGMENT_PROGRAM_ARB, PP_INVERSE_RES, parm );
// <--- sikk - Included non-power-of-two/frag position conversion

   qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_LIGHT_ORIGIN, din->localLightOrigin.ToFloatPtr() );
   qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_VIEW_ORIGIN, din->localViewOrigin.ToFloatPtr() );
   qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_LIGHT_PROJECT_S, din->lightProjection[0].ToFloatPtr() );
   qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_LIGHT_PROJECT_T, din->lightProjection[1].ToFloatPtr() );
   qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_LIGHT_PROJECT_Q, din->lightProjection[2].ToFloatPtr() );
   qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_LIGHT_FALLOFF_S, din->lightProjection[3].ToFloatPtr() );
   qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_BUMP_MATRIX_S, din->bumpMatrix[0].ToFloatPtr() );
   qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_BUMP_MATRIX_T, din->bumpMatrix[1].ToFloatPtr() );
   qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_DIFFUSE_MATRIX_S, din->diffuseMatrix[0].ToFloatPtr() );
   qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_DIFFUSE_MATRIX_T, din->diffuseMatrix[1].ToFloatPtr() );
   qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_SPECULAR_MATRIX_S, din->specularMatrix[0].ToFloatPtr() );
   qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_SPECULAR_MATRIX_T, din->specularMatrix[1].ToFloatPtr() );

// ---> sikk - Include model matrix for to-world-space transformations
   const struct viewEntity_s *space = backEnd.currentSpace;
   parm[0] = space->modelMatrix[0];
   parm[1] = space->modelMatrix[4];
   parm[2] = space->modelMatrix[8];
   parm[3] = space->modelMatrix[12];
   qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_MODEL_MATRIX_X, parm );
   parm[0] = space->modelMatrix[1];
   parm[1] = space->modelMatrix[5];
   parm[2] = space->modelMatrix[9];
   parm[3] = space->modelMatrix[13];
   qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_MODEL_MATRIX_Y, parm );
   parm[0] = space->modelMatrix[2];
   parm[1] = space->modelMatrix[6];
   parm[2] = space->modelMatrix[10];
   parm[3] = space->modelMatrix[14];
   qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_MODEL_MATRIX_Z, parm );
// <--- sikk - Include model matrix for to-world-space transformations

// ---> sikk - Condensed vertex color param
   static const float ignore[ 4 ]         = {  0.0, 1.0, 1.0, 1.0 };
   static const float modulate[ 4 ]      = {  1.0, 0.0, 1.0, 1.0 };
   static const float inv_modulate[ 4 ]   = { -1.0, 1.0, 1.0, 1.0 };

   switch ( din->vertexColor ) {
   case SVC_IGNORE:
      qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_COLOR_MODULATE_ADD, ignore );
      break;
   case SVC_MODULATE:
      qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_COLOR_MODULATE_ADD, modulate );
      break;
   case SVC_INVERSE_MODULATE:
      qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_COLOR_MODULATE_ADD, inv_modulate );
      break;
   }
// <--- sikk - Condensed vertex color param

   // set the constant colors
// ---> sikk - Use single light color value for both diffuse & specular, also changed the position
   qglProgramEnvParameter4fvARB( GL_FRAGMENT_PROGRAM_ARB, PP_LIGHT_COLOR, din->diffuseColor.ToFloatPtr() );
// <--- sikk - Use single light color value for both diffuse & specular

   // set the textures
// ---> sikk - changed texture order
   // texture 0 will be the light projection texture
   GL_SelectTextureNoClient( 0 );
   din->lightImage->Bind();

   // texture 1 will be the light falloff texture
   GL_SelectTextureNoClient( 1 );
   din->lightFalloffImage->Bind();

   // texture 1 will be the per-surface bump map
   GL_SelectTextureNoClient( 2 );
   din->bumpImage->Bind();

   // texture 2 is the per-surface diffuse map
   GL_SelectTextureNoClient( 3 );
   din->diffuseImage->Bind();

   // texture 3 is the per-surface specular map
   GL_SelectTextureNoClient( 4 );
   din->specularImage->Bind();

   // texture 4 is the ssao buffer
   GL_SelectTextureNoClient( 5 );
   globalImages->ssaoImage->Bind();

// ---> sikk - Auxilary textures for interaction shaders
   // per-surface auxilary texture 0 - 9
   for ( int i = 0; i < din->surf->material->GetNumInteractionImages(); i++ ) {
      GL_SelectTextureNoClient( i + 6 );
      din->surf->material->GetInteractionImage( i )->Bind();
   }
// <--- sikk - Auxilary textures for interaction shaders
// <--- sikk - changed texture order

   // draw it
   RB_DrawElementsWithCounters( din->surf->geo );
}

[revelator]

http://www.iddevnet.com/doom3/
for info on shaders/materials the ID tech 4 engine can handle.
Might help some people

[bugmenot]

Just to clarify things with ssao and the depth buffer stuff. In sikkmod, I had to render there scene again, overriding each surface material with a global material that would spit out an encoded view space depth. This is why alpha tested/blended surfaces have their whole surface opaque in this depth render causing ao contributions where there shouldn't be. If you didn't touch the ssao material, then it's most likely still using this depth render hack instead of the depth buffer which is why you have dark outlines around your heathaze surfaces. Regardless, the ssao shader that is in sikkmod won't work with the depth buffer.

[revelator]

Sikkpin i presume ?

aye its your old version from sikkmod 1.2 not the one from your work on doom3 itself (still cannot get the darn thing to run )

I figured i couldnt use your sikkmod shader if i implemented it engine side but thanks for the warning

Welcome Btw did you get hold on any of the other admins here ? since i see you are using the bugmenot acc.

[bugmenot]

Yeah, I should have signed that post to avoid confusion. And, no, I haven't talked to any admins but I'll just leave this here in case one a happens by:

email: sikkpin at hotmail dot com.

[revelator]

Ok m8 ill see if i can wake one of them if not

[Dr. Shadowborg]

I've set Sikkpin up an account. He should keep an eye out for a mail from prismrifle, as it contains his password.

[Sikkpin]

Thank you. Got the email. Everything works, obviously. A very fitting password I was given.

[revelator]

Welcome m8

[mh]

BUG ALERT!

If you've seen this page: http://www.viva64.com/en/b/0151/#ID0EMEBK you may have implemented some of the fixes in it. There's a further bug in fragment 10: if you just do the obvious and use "memset (ase.currentMesh, 0, sizeof (*ase.currentMesh));" - you'll wipe the transforms and - as these apply to normals - you're going to end up with some models appearing all or mostly black in the game - the little blue/white boxes in many maps, and the floating platforms in Central Processing are two examples.

Suggest something like this instead:

Code: Select all

      ase.currentMesh = &ase.currentObject->mesh;

      // the transform is applied to normals so it must be saved out before we clear the mesh
      idVec3 transform[4];

      transform[0] = ase.currentMesh->transform[0];
      transform[1] = ase.currentMesh->transform[1];
      transform[2] = ase.currentMesh->transform[2];
      transform[3] = ase.currentMesh->transform[3];

      // and now it's safe to clear
      memset (ase.currentMesh, 0, sizeof (*ase.currentMesh));

      // and now we restore the saved out transform
      ase.currentMesh->transform[0] = transform[0];
      ase.currentMesh->transform[1] = transform[1];
      ase.currentMesh->transform[2] = transform[2];
      ase.currentMesh->transform[3] = transform[3];

      ASE_ParseBracedBlock (ASE_KeyMESH);