/*
==================
RB_SetProgramEnvironmentSpace
Sets variables related to the current space that can be used by all vertex programs
==================
*/
void RB_SetProgramEnvironmentSpace( void ) {
if ( !glConfig.ARBVertexProgramAvailable ) {
return;
}
const struct viewEntity_s *space = backEnd.currentSpace;
float parm[4];
// set eye position in local space
R_GlobalPointToLocal( space->modelMatrix, backEnd.viewDef->renderView.vieworg, *(idVec3 *)parm );
parm[3] = 1.0;
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, 5, parm );
// we need the model matrix without it being combined with the view matrix
// so we can transform local vectors to global coordinates
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, 6, 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, 7, 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, 8, parm );
}
static void glSetFragmentShaderConstantATI (GLuint num, const GLfloat *val) {
int constNum = num-GL_CON_0_ATI;
if (sGeneratingProgram) {
char str[128];
sprintf (str, " CONSTANT c%d = { %f, %f, %f, %f };\n", constNum, val[0], val[1], val[2], val[3]);
strcat (sConstString, str);
sConst[constNum] = 2;
}
else {
// According to Duane, frequent setting of fragment shader constants, even if they contain
// the same value, will cause a performance hit.
// According to Chris Bentley at ATI, this performance hit appears if you are using
// many different fragment shaders in each scene.
// So, we cache those values and only set the constants if they are different.
if (memcmp (val, sConstVal[constNum], sizeof(GLfloat)*8*4) != 0)
{
qglProgramEnvParameter4fvARB (GL_TEXT_FRAGMENT_SHADER_ATI, num-GL_CON_0_ATI, val);
memcpy (sConstVal[constNum], val, sizeof(GLfloat)*8*4);
}
}
}
/*
==================
RB_ARB2_DrawInteraction
==================
*/
void RB_ARB2_DrawInteraction( const drawInteraction_t *din ) {
// load all the vertex program parameters
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() );
// testing fragment based normal mapping
if ( r_testARBProgram.GetBool() ) {
qglProgramEnvParameter4fvARB( GL_FRAGMENT_PROGRAM_ARB, 2, din->localLightOrigin.ToFloatPtr() );
qglProgramEnvParameter4fvARB( GL_FRAGMENT_PROGRAM_ARB, 3, din->localViewOrigin.ToFloatPtr() );
}
static const float zero[4] = { 0, 0, 0, 0 };
static const float one[4] = { 1, 1, 1, 1 };
static const float negOne[4] = { -1, -1, -1, -1 };
switch ( din->vertexColor ) {
case SVC_IGNORE:
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_COLOR_MODULATE, zero );
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_COLOR_ADD, one );
break;
case SVC_MODULATE:
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_COLOR_MODULATE, one );
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_COLOR_ADD, zero );
break;
case SVC_INVERSE_MODULATE:
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_COLOR_MODULATE, negOne );
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_COLOR_ADD, one );
break;
}
// set the constant colors
qglProgramEnvParameter4fvARB( GL_FRAGMENT_PROGRAM_ARB, 0, din->diffuseColor.ToFloatPtr() );
qglProgramEnvParameter4fvARB( GL_FRAGMENT_PROGRAM_ARB, 1, din->specularColor.ToFloatPtr() );
// set the textures
// texture 1 will be the per-surface bump map
GL_SelectTextureNoClient( 1 );
din->bumpImage->Bind();
// texture 2 will be the light falloff texture
GL_SelectTextureNoClient( 2 );
din->lightFalloffImage->Bind();
// texture 3 will be the light projection texture
GL_SelectTextureNoClient( 3 );
din->lightImage->Bind();
// texture 4 is the per-surface diffuse map
GL_SelectTextureNoClient( 4 );
din->diffuseImage->Bind();
// texture 5 is the per-surface specular map
GL_SelectTextureNoClient( 5 );
din->specularImage->Bind();
// draw it
RB_DrawElementsWithCounters( din->surf->geo );
}
/*
==================
RB_SetProgramEnvironment
Sets variables that can be used by all vertex programs
==================
*/
void RB_SetProgramEnvironment( void ) {
float parm[4];
int pot;
if ( !glConfig.ARBVertexProgramAvailable ) {
return;
}
#if 0
// screen power of two correction factor, one pixel in so we don't get a bilerp
// of an uncopied pixel
int w = backEnd.viewDef->viewport.x2 - backEnd.viewDef->viewport.x1 + 1;
pot = globalImages->currentRenderImage->uploadWidth;
if ( w == pot ) {
parm[0] = 1.0;
} else {
parm[0] = (float)(w-1) / pot;
}
int h = backEnd.viewDef->viewport.y2 - backEnd.viewDef->viewport.y1 + 1;
pot = globalImages->currentRenderImage->uploadHeight;
if ( h == pot ) {
parm[1] = 1.0;
} else {
parm[1] = (float)(h-1) / pot;
}
parm[2] = 0;
parm[3] = 1;
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, 0, parm );
#else
// screen power of two correction factor, assuming the copy to _currentRender
// also copied an extra row and column for the bilerp
int w = backEnd.viewDef->viewport.x2 - backEnd.viewDef->viewport.x1 + 1;
pot = globalImages->currentRenderImage->uploadWidth;
parm[0] = (float)w / pot;
int h = backEnd.viewDef->viewport.y2 - backEnd.viewDef->viewport.y1 + 1;
pot = globalImages->currentRenderImage->uploadHeight;
parm[1] = (float)h / pot;
parm[2] = 0;
parm[3] = 1;
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, 0, parm );
#endif
qglProgramEnvParameter4fvARB( GL_FRAGMENT_PROGRAM_ARB, 0, parm );
// window coord to 0.0 to 1.0 conversion
parm[0] = 1.0 / w;
parm[1] = 1.0 / h;
parm[2] = 0;
parm[3] = 1;
qglProgramEnvParameter4fvARB( GL_FRAGMENT_PROGRAM_ARB, 1, parm );
//
// set eye position in global space
//
parm[0] = backEnd.viewDef->renderView.vieworg[0];
parm[1] = backEnd.viewDef->renderView.vieworg[1];
parm[2] = backEnd.viewDef->renderView.vieworg[2];
parm[3] = 1.0;
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, 1, parm );
}
/*
=====================
RB_T_Shadow
the shadow volumes face INSIDE
=====================
*/
static void RB_T_Shadow( const drawSurf_t *surf ) {
const srfTriangles_t *tri;
// set the light position if we are using a vertex program to project the rear surfaces
if ( tr.backEndRendererHasVertexPrograms && r_useShadowVertexProgram.GetBool()
&& surf->space != backEnd.currentSpace ) {
idVec4 localLight;
R_GlobalPointToLocal( surf->space->modelMatrix, backEnd.vLight->globalLightOrigin, localLight.ToVec3() );
localLight.w = 0.0f;
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_LIGHT_ORIGIN, localLight.ToFloatPtr() );
}
tri = surf->geo;
if ( !tri->shadowCache ) {
return;
}
qglVertexPointer( 4, GL_FLOAT, sizeof( shadowCache_t ), vertexCache.Position(tri->shadowCache) );
// we always draw the sil planes, but we may not need to draw the front or rear caps
int numIndexes;
bool external = false;
if ( !r_useExternalShadows.GetInteger() ) {
numIndexes = tri->numIndexes;
} else if ( r_useExternalShadows.GetInteger() == 2 ) { // force to no caps for testing
numIndexes = tri->numShadowIndexesNoCaps;
} else if ( !(surf->dsFlags & DSF_VIEW_INSIDE_SHADOW) ) {
// if we aren't inside the shadow projection, no caps are ever needed needed
numIndexes = tri->numShadowIndexesNoCaps;
external = true;
} else if ( !backEnd.vLight->viewInsideLight && !(surf->geo->shadowCapPlaneBits & SHADOW_CAP_INFINITE) ) {
// if we are inside the shadow projection, but outside the light, and drawing
// a non-infinite shadow, we can skip some caps
if ( backEnd.vLight->viewSeesShadowPlaneBits & surf->geo->shadowCapPlaneBits ) {
// we can see through a rear cap, so we need to draw it, but we can skip the
// caps on the actual surface
numIndexes = tri->numShadowIndexesNoFrontCaps;
} else {
// we don't need to draw any caps
numIndexes = tri->numShadowIndexesNoCaps;
}
external = true;
} else {
// must draw everything
numIndexes = tri->numIndexes;
}
// set depth bounds
if( glConfig.depthBoundsTestAvailable && r_useDepthBoundsTest.GetBool() ) {
qglDepthBoundsEXT( surf->scissorRect.zmin, surf->scissorRect.zmax );
}
// debug visualization
if ( r_showShadows.GetInteger() ) {
if ( r_showShadows.GetInteger() == 3 ) {
if ( external ) {
qglColor3f( 0.1/backEnd.overBright, 1/backEnd.overBright, 0.1/backEnd.overBright );
} else {
// these are the surfaces that require the reverse
qglColor3f( 1/backEnd.overBright, 0.1/backEnd.overBright, 0.1/backEnd.overBright );
}
} else {
// draw different color for turboshadows
if ( surf->geo->shadowCapPlaneBits & SHADOW_CAP_INFINITE ) {
if ( numIndexes == tri->numIndexes ) {
qglColor3f( 1/backEnd.overBright, 0.1/backEnd.overBright, 0.1/backEnd.overBright );
} else {
qglColor3f( 1/backEnd.overBright, 0.4/backEnd.overBright, 0.1/backEnd.overBright );
}
} else {
if ( numIndexes == tri->numIndexes ) {
qglColor3f( 0.1/backEnd.overBright, 1/backEnd.overBright, 0.1/backEnd.overBright );
} else if ( numIndexes == tri->numShadowIndexesNoFrontCaps ) {
qglColor3f( 0.1/backEnd.overBright, 1/backEnd.overBright, 0.6/backEnd.overBright );
} else {
qglColor3f( 0.6/backEnd.overBright, 1/backEnd.overBright, 0.1/backEnd.overBright );
}
}
}
qglStencilOp( GL_KEEP, GL_KEEP, GL_KEEP );
qglDisable( GL_STENCIL_TEST );
GL_Cull( CT_TWO_SIDED );
RB_DrawShadowElementsWithCounters( tri, numIndexes );
GL_Cull( CT_FRONT_SIDED );
qglEnable( GL_STENCIL_TEST );
return;
}
// patent-free work around
if ( !external ) {
// "preload" the stencil buffer with the number of volumes
// that get clipped by the near or far clip plane
qglStencilOp( GL_KEEP, tr.stencilDecr, tr.stencilDecr );
GL_Cull( CT_FRONT_SIDED );
RB_DrawShadowElementsWithCounters( tri, numIndexes );
qglStencilOp( GL_KEEP, tr.stencilIncr, tr.stencilIncr );
GL_Cull( CT_BACK_SIDED );
RB_DrawShadowElementsWithCounters( tri, numIndexes );
}
// traditional depth-pass stencil shadows
qglStencilOp( GL_KEEP, GL_KEEP, tr.stencilIncr );
GL_Cull( CT_FRONT_SIDED );
RB_DrawShadowElementsWithCounters( tri, numIndexes );
qglStencilOp( GL_KEEP, GL_KEEP, tr.stencilDecr );
GL_Cull( CT_BACK_SIDED );
RB_DrawShadowElementsWithCounters( tri, numIndexes );
}
/*
===================
RB_R200_ARB_DrawInteraction
===================
*/
static void RB_R200_ARB_DrawInteraction( const drawInteraction_t *din ) {
// check for the case we can't handle in a single pass (we could calculate this at shader parse time to optimize)
if ( din->diffuseImage != globalImages->blackImage && din->specularImage != globalImages->blackImage
&& memcmp( din->specularMatrix, din->diffuseMatrix, sizeof( din->diffuseMatrix ) ) ) {
// common->Printf( "Note: Shader %s drawn as two pass on R200\n", din->surf->shader->getName() );
// draw the specular as a separate pass with a black diffuse map
drawInteraction_t d;
d = *din;
d.diffuseImage = globalImages->blackImage;
memcpy( d.diffuseMatrix, d.specularMatrix, sizeof( d.diffuseMatrix ) );
RB_R200_ARB_DrawInteraction( &d );
// now fall through and draw the diffuse pass with a black specular map
d = *din;
din = &d;
d.specularImage = globalImages->blackImage;
}
// load all the vertex program parameters
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->diffuseMatrix[0].ToFloatPtr() );
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_SPECULAR_MATRIX_T, din->diffuseMatrix[1].ToFloatPtr() );
const srfTriangles_t *tri = din->surf->geo;
idDrawVert *ac = (idDrawVert *)vertexCache.Position( tri->ambientCache );
qglVertexPointer( 3, GL_FLOAT, sizeof( idDrawVert ), (void *)&ac->xyz );
static const float zero[4] = { 0, 0, 0, 0 };
static const float one[4] = { 1, 1, 1, 1 };
static const float negOne[4] = { -1, -1, -1, -1 };
switch ( din->vertexColor ) {
case SVC_IGNORE:
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_COLOR_MODULATE, zero );
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_COLOR_ADD, one );
break;
case SVC_MODULATE:
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_COLOR_MODULATE, one );
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_COLOR_ADD, zero );
break;
case SVC_INVERSE_MODULATE:
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_COLOR_MODULATE, negOne );
qglProgramEnvParameter4fvARB( GL_VERTEX_PROGRAM_ARB, PP_COLOR_ADD, one );
break;
}
// texture 0 = light projection
// texture 1 = light falloff
// texture 2 = surface diffuse
// texture 3 = surface specular
// texture 4 = surface bump
// texture 5 = normalization cube map
GL_SelectTexture( 5 );
if ( din->ambientLight ) {
globalImages->ambientNormalMap->Bind();
} else {
globalImages->normalCubeMapImage->Bind();
}
GL_SelectTexture( 4 );
din->bumpImage->Bind();
GL_SelectTexture( 3 );
din->specularImage->Bind();
qglTexCoordPointer( 3, GL_FLOAT, sizeof( idDrawVert ), (void *)&ac->normal );
GL_SelectTexture( 2 );
din->diffuseImage->Bind();
qglTexCoordPointer( 3, GL_FLOAT, sizeof( idDrawVert ), (void *)&ac->tangents[1][0] );
GL_SelectTexture( 1 );
din->lightFalloffImage->Bind();
qglTexCoordPointer( 3, GL_FLOAT, sizeof( idDrawVert ), (void *)&ac->tangents[0][0] );
GL_SelectTexture( 0 );
din->lightImage->Bind();
qglTexCoordPointer( 2, GL_FLOAT, sizeof( idDrawVert ), (void *)&ac->st[0] );
qglSetFragmentShaderConstantATI( GL_CON_0_ATI, din->diffuseColor.ToFloatPtr() );
qglSetFragmentShaderConstantATI( GL_CON_1_ATI, din->specularColor.ToFloatPtr() );
if ( din->vertexColor != SVC_IGNORE ) {
qglColorPointer( 4, GL_UNSIGNED_BYTE, sizeof(idDrawVert), (void *)&ac->color );
qglEnableClientState( GL_COLOR_ARRAY );
RB_DrawElementsWithCounters( tri );
qglDisableClientState( GL_COLOR_ARRAY );
qglColor4f( 1, 1, 1, 1 );
} else {
RB_DrawElementsWithCounters( tri );
}
}
/*
==================
RB_NV20_DrawInteraction
==================
*/
static void RB_NV20_DrawInteraction(const drawInteraction_t *din)
{
const drawSurf_t *surf = din->surf;
// load all the vertex program parameters
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());
// set the constant colors
qglCombinerParameterfvNV(GL_CONSTANT_COLOR0_NV, din->diffuseColor.ToFloatPtr());
qglCombinerParameterfvNV(GL_CONSTANT_COLOR1_NV, din->specularColor.ToFloatPtr());
// vertex color passes should be pretty rare (cross-faded bump map surfaces), so always
// run them down as three-passes
if (din->vertexColor != SVC_IGNORE) {
qglEnableClientState(GL_COLOR_ARRAY);
RB_NV20_DI_BumpAndLightPass(din, false);
RB_NV20_DI_DiffuseColorPass(din);
RB_NV20_DI_SpecularColorPass(din);
qglDisableClientState(GL_COLOR_ARRAY);
return;
}
qglColor3f(1, 1, 1);
// on an ideal card, we would now just bind the textures and call a
// single pass vertex / fragment program, but
// on NV20, we need to decide which single / dual / tripple pass set of programs to use
// ambient light could be done as a single pass if we want to optimize for it
// monochrome light is two passes
int internalFormat = din->lightImage->internalFormat;
if ((r_useNV20MonoLights.GetInteger() == 2) ||
(din->lightImage->isMonochrome && r_useNV20MonoLights.GetInteger())) {
// do a two-pass rendering
RB_NV20_DI_BumpAndLightPass(din, true);
RB_NV20_DI_DiffuseAndSpecularColorPass(din);
} else {
// general case is three passes
// ( bump dot lightDir ) * lightFalloff
// diffuse * lightProject
// specular * ( bump dot halfAngle extended ) * lightProject
RB_NV20_DI_BumpAndLightPass(din, false);
RB_NV20_DI_DiffuseColorPass(din);
RB_NV20_DI_SpecularColorPass(din);
}
}
