/*
====================
RB_RenderDrawSurfListWithFunction
The triangle functions can check backEnd.currentSpace != surf->space
to see if they need to perform any new matrix setup. The modelview
matrix will already have been loaded, and backEnd.currentSpace will
be updated after the triangle function completes.
====================
*/
void RB_RenderDrawSurfListWithFunction( drawSurf_t **drawSurfs, int numDrawSurfs,
void (*triFunc_)( const drawSurf_t *) ) {
int i;
const drawSurf_t *drawSurf;
backEnd.currentSpace = NULL;
for (i = 0 ; i < numDrawSurfs ; i++ ) {
drawSurf = drawSurfs[i];
// change the matrix if needed
if ( drawSurf->space != backEnd.currentSpace ) {
qglLoadMatrixf( drawSurf->space->modelViewMatrix );
}
if ( drawSurf->space->weaponDepthHack ) {
RB_EnterWeaponDepthHack();
}
if ( drawSurf->space->modelDepthHack != 0.0f ) {
RB_EnterModelDepthHack( drawSurf->space->modelDepthHack );
}
// change the scissor if needed
if ( r_useScissor.GetBool() && !backEnd.currentScissor.Equals( drawSurf->scissorRect ) ) {
backEnd.currentScissor = drawSurf->scissorRect;
qglScissor( backEnd.viewDef->viewport.x1 + backEnd.currentScissor.x1,
backEnd.viewDef->viewport.y1 + backEnd.currentScissor.y1,
backEnd.currentScissor.x2 + 1 - backEnd.currentScissor.x1,
backEnd.currentScissor.y2 + 1 - backEnd.currentScissor.y1 );
}
// render it
triFunc_( drawSurf );
if ( drawSurf->space->weaponDepthHack || drawSurf->space->modelDepthHack != 0.0f ) {
RB_LeaveDepthHack();
}
backEnd.currentSpace = drawSurf->space;
}
}
/*
==================
RB_STD_T_RenderShaderPasses
This is also called for the generated 2D rendering
==================
*/
void RB_STD_T_RenderShaderPasses( const drawSurf_t *surf ) {
int stage;
const idMaterial *shader;
const shaderStage_t *pStage;
const float *regs;
float color[4];
const srfTriangles_t *tri;
tri = surf->geo;
shader = surf->material;
if ( !shader->HasAmbient() ) {
return;
}
if ( shader->IsPortalSky() ) {
return;
}
// change the matrix if needed
if ( surf->space != backEnd.currentSpace ) {
qglLoadMatrixf( surf->space->modelViewMatrix );
backEnd.currentSpace = surf->space;
RB_SetProgramEnvironmentSpace();
}
// change the scissor if needed
if ( r_useScissor.GetBool() && !backEnd.currentScissor.Equals( surf->scissorRect ) ) {
backEnd.currentScissor = surf->scissorRect;
qglScissor( backEnd.viewDef->viewport.x1 + backEnd.currentScissor.x1,
backEnd.viewDef->viewport.y1 + backEnd.currentScissor.y1,
backEnd.currentScissor.x2 + 1 - backEnd.currentScissor.x1,
backEnd.currentScissor.y2 + 1 - backEnd.currentScissor.y1 );
}
// some deforms may disable themselves by setting numIndexes = 0
if ( !tri->numIndexes ) {
return;
}
if ( !tri->ambientCache ) {
common->Printf( "RB_T_RenderShaderPasses: !tri->ambientCache\n" );
return;
}
// get the expressions for conditionals / color / texcoords
regs = surf->shaderRegisters;
// set face culling appropriately
GL_Cull( shader->GetCullType() );
// set polygon offset if necessary
if ( shader->TestMaterialFlag(MF_POLYGONOFFSET) ) {
qglEnable( GL_POLYGON_OFFSET_FILL );
qglPolygonOffset( r_offsetFactor.GetFloat(), r_offsetUnits.GetFloat() * shader->GetPolygonOffset() );
}
if ( surf->space->weaponDepthHack ) {
RB_EnterWeaponDepthHack();
}
if ( surf->space->modelDepthHack != 0.0f ) {
RB_EnterModelDepthHack( surf->space->modelDepthHack );
}
idDrawVert *ac = (idDrawVert *)vertexCache.Position( tri->ambientCache );
qglVertexPointer( 3, GL_FLOAT, sizeof( idDrawVert ), ac->xyz.ToFloatPtr() );
qglTexCoordPointer( 2, GL_FLOAT, sizeof( idDrawVert ), reinterpret_cast<void *>(&ac->st) );
for ( stage = 0; stage < shader->GetNumStages() ; stage++ ) {
pStage = shader->GetStage(stage);
// check the enable condition
if ( regs[ pStage->conditionRegister ] == 0 ) {
continue;
}
// skip the stages involved in lighting
if ( pStage->lighting != SL_AMBIENT ) {
continue;
}
// skip if the stage is ( GL_ZERO, GL_ONE ), which is used for some alpha masks
if ( ( pStage->drawStateBits & (GLS_SRCBLEND_BITS|GLS_DSTBLEND_BITS) ) == ( GLS_SRCBLEND_ZERO | GLS_DSTBLEND_ONE ) ) {
continue;
}
// see if we are a new-style stage
newShaderStage_t *newStage = pStage->newStage;
if ( newStage ) {
//--------------------------
//
// new style stages
//
//--------------------------
// completely skip the stage if we don't have the capability
if ( tr.backEndRenderer != BE_ARB2 ) {
continue;
}
if ( r_skipNewAmbient.GetBool() ) {
continue;
}
qglColorPointer( 4, GL_UNSIGNED_BYTE, sizeof( idDrawVert ), (void *)&ac->color );
qglVertexAttribPointerARB( 9, 3, GL_FLOAT, false, sizeof( idDrawVert ), ac->tangents[0].ToFloatPtr() );
qglVertexAttribPointerARB( 10, 3, GL_FLOAT, false, sizeof( idDrawVert ), ac->tangents[1].ToFloatPtr() );
qglNormalPointer( GL_FLOAT, sizeof( idDrawVert ), ac->normal.ToFloatPtr() );
qglEnableClientState( GL_COLOR_ARRAY );
qglEnableVertexAttribArrayARB( 9 );
qglEnableVertexAttribArrayARB( 10 );
qglEnableClientState( GL_NORMAL_ARRAY );
GL_State( pStage->drawStateBits );
qglBindProgramARB( GL_VERTEX_PROGRAM_ARB, newStage->vertexProgram );
qglEnable( GL_VERTEX_PROGRAM_ARB );
// megaTextures bind a lot of images and set a lot of parameters
if ( newStage->megaTexture ) {
newStage->megaTexture->SetMappingForSurface( tri );
idVec3 localViewer;
R_GlobalPointToLocal( surf->space->modelMatrix, backEnd.viewDef->renderView.vieworg, localViewer );
newStage->megaTexture->BindForViewOrigin( localViewer );
}
for ( int i = 0 ; i < newStage->numVertexParms ; i++ ) {
float parm[4];
parm[0] = regs[ newStage->vertexParms[i][0] ];
parm[1] = regs[ newStage->vertexParms[i][1] ];
parm[2] = regs[ newStage->vertexParms[i][2] ];
parm[3] = regs[ newStage->vertexParms[i][3] ];
qglProgramLocalParameter4fvARB( GL_VERTEX_PROGRAM_ARB, i, parm );
}
for ( int i = 0 ; i < newStage->numFragmentProgramImages ; i++ ) {
if ( newStage->fragmentProgramImages[i] ) {
GL_SelectTexture( i );
newStage->fragmentProgramImages[i]->Bind();
}
}
qglBindProgramARB( GL_FRAGMENT_PROGRAM_ARB, newStage->fragmentProgram );
qglEnable( GL_FRAGMENT_PROGRAM_ARB );
// draw it
RB_DrawElementsWithCounters( tri );
for ( int i = 1 ; i < newStage->numFragmentProgramImages ; i++ ) {
if ( newStage->fragmentProgramImages[i] ) {
GL_SelectTexture( i );
globalImages->BindNull();
}
}
if ( newStage->megaTexture ) {
newStage->megaTexture->Unbind();
}
GL_SelectTexture( 0 );
qglDisable( GL_VERTEX_PROGRAM_ARB );
qglDisable( GL_FRAGMENT_PROGRAM_ARB );
// Fixme: Hack to get around an apparent bug in ATI drivers. Should remove as soon as it gets fixed.
qglBindProgramARB( GL_VERTEX_PROGRAM_ARB, 0 );
qglDisableClientState( GL_COLOR_ARRAY );
qglDisableVertexAttribArrayARB( 9 );
qglDisableVertexAttribArrayARB( 10 );
qglDisableClientState( GL_NORMAL_ARRAY );
continue;
}
//--------------------------
//
// old style stages
//
//--------------------------
// set the color
color[0] = regs[ pStage->color.registers[0] ];
color[1] = regs[ pStage->color.registers[1] ];
color[2] = regs[ pStage->color.registers[2] ];
color[3] = regs[ pStage->color.registers[3] ];
// skip the entire stage if an add would be black
if ( ( pStage->drawStateBits & (GLS_SRCBLEND_BITS|GLS_DSTBLEND_BITS) ) == ( GLS_SRCBLEND_ONE | GLS_DSTBLEND_ONE )
&& color[0] <= 0 && color[1] <= 0 && color[2] <= 0 ) {
continue;
}
// skip the entire stage if a blend would be completely transparent
if ( ( pStage->drawStateBits & (GLS_SRCBLEND_BITS|GLS_DSTBLEND_BITS) ) == ( GLS_SRCBLEND_SRC_ALPHA | GLS_DSTBLEND_ONE_MINUS_SRC_ALPHA )
&& color[3] <= 0 ) {
continue;
}
// select the vertex color source
if ( pStage->vertexColor == SVC_IGNORE ) {
qglColor4fv( color );
} else {
qglColorPointer( 4, GL_UNSIGNED_BYTE, sizeof( idDrawVert ), (void *)&ac->color );
qglEnableClientState( GL_COLOR_ARRAY );
if ( pStage->vertexColor == SVC_INVERSE_MODULATE ) {
GL_TexEnv( GL_COMBINE_ARB );
qglTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE );
qglTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE );
qglTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PRIMARY_COLOR_ARB );
qglTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR );
qglTexEnvi( GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_ONE_MINUS_SRC_COLOR );
qglTexEnvi( GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1 );
}
// for vertex color and modulated color, we need to enable a second
// texture stage
if ( color[0] != 1 || color[1] != 1 || color[2] != 1 || color[3] != 1 ) {
GL_SelectTexture( 1 );
globalImages->whiteImage->Bind();
GL_TexEnv( GL_COMBINE_ARB );
qglTexEnvfv( GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, color );
qglTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE );
qglTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_PREVIOUS_ARB );
qglTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_CONSTANT_ARB );
qglTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR );
qglTexEnvi( GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR );
qglTexEnvi( GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1 );
qglTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_MODULATE );
qglTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_PREVIOUS_ARB );
qglTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_CONSTANT_ARB );
qglTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA );
qglTexEnvi( GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA );
qglTexEnvi( GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1 );
GL_SelectTexture( 0 );
}
}
// bind the texture
RB_BindVariableStageImage( &pStage->texture, regs );
// set the state
GL_State( pStage->drawStateBits );
RB_PrepareStageTexturing( pStage, surf, ac );
// draw it
RB_DrawElementsWithCounters( tri );
RB_FinishStageTexturing( pStage, surf, ac );
if ( pStage->vertexColor != SVC_IGNORE ) {
qglDisableClientState( GL_COLOR_ARRAY );
GL_SelectTexture( 1 );
GL_TexEnv( GL_MODULATE );
globalImages->BindNull();
GL_SelectTexture( 0 );
GL_TexEnv( GL_MODULATE );
}
}
// reset polygon offset
if ( shader->TestMaterialFlag(MF_POLYGONOFFSET) ) {
qglDisable( GL_POLYGON_OFFSET_FILL );
}
if ( surf->space->weaponDepthHack || surf->space->modelDepthHack != 0.0f ) {
RB_LeaveDepthHack();
}
}
/*
==================
RB_RenderInteraction
backEnd.vLight
backEnd.lightScale
backEnd.depthFunc must be equal for alpha tested surfaces to work right,
it is set to lessThan for blended transparent surfaces
This expects a bumpmap stage before a diffuse stage before a specular stage
The material code is responsible for guaranteeing that, but conditional stages
can still make it invalid.
you can't blend two bumpmaps, but you can change bump maps between
blended diffuse / specular maps to get the same effect
==================
*/
static void RB_RenderInteraction( const drawSurf_t *surf ) {
const idMaterial *surfaceShader = surf->material;
const float *surfaceRegs = surf->shaderRegisters;
const viewLight_t *vLight = backEnd.vLight;
const idMaterial *lightShader = vLight->lightShader;
const float *lightRegs = vLight->shaderRegisters;
static idPlane lightProject[4]; // reused across function calls
const srfTriangles_t *tri = surf->geo;
const shaderStage_t *lastBumpStage = NULL;
RB_LogComment( "---------- RB_RenderInteraction %s on %s ----------\n",
lightShader->GetName(), surfaceShader->GetName() );
// change the matrix and light projection vectors if needed
if ( surf->space != backEnd.currentSpace ) {
backEnd.currentSpace = surf->space;
qglLoadMatrixf( surf->space->modelViewMatrix );
for ( int i = 0 ; i < 4 ; i++ ) {
R_GlobalPlaneToLocal( surf->space->modelMatrix, backEnd.vLight->lightProject[i], lightProject[i] );
}
}
// change the scissor if needed
if ( r_useScissor.GetBool() && !backEnd.currentScissor.Equals( surf->scissorRect ) ) {
backEnd.currentScissor = surf->scissorRect;
qglScissor( backEnd.viewDef->viewport.x1 + backEnd.currentScissor.x1,
backEnd.viewDef->viewport.y1 + backEnd.currentScissor.y1,
backEnd.currentScissor.x2 + 1 - backEnd.currentScissor.x1,
backEnd.currentScissor.y2 + 1 - backEnd.currentScissor.y1 );
}
// hack depth range if needed
if ( surf->space->weaponDepthHack ) {
RB_EnterWeaponDepthHack();
}
if ( surf->space->modelDepthHack != 0.0f ) {
RB_EnterModelDepthHack( surf->space->modelDepthHack );
}
// set the vertex arrays, which may not all be enabled on a given pass
idDrawVert *ac = (idDrawVert *)vertexCache.Position(tri->ambientCache);
qglVertexPointer( 3, GL_FLOAT, sizeof( idDrawVert ), ac->xyz.ToFloatPtr() );
GL_SelectTexture( 0 );
qglTexCoordPointer( 2, GL_FLOAT, sizeof( idDrawVert ), ac->st.ToFloatPtr() );
qglColorPointer( 4, GL_UNSIGNED_BYTE, sizeof( idDrawVert ), ac->color );
// go through the individual stages
for ( int i = 0 ; i < surfaceShader->GetNumStages() ; i++ ) {
const shaderStage_t *surfaceStage = surfaceShader->GetStage( i );
// ignore ambient stages while drawing interactions
if ( surfaceStage->lighting == SL_AMBIENT ) {
continue;
}
// ignore stages that fail the condition
if ( !surfaceRegs[ surfaceStage->conditionRegister ] ) {
continue;
}
//-----------------------------------------------------
//
// bump / falloff
//
//-----------------------------------------------------
if ( surfaceStage->lighting == SL_BUMP ) {
// render light falloff * bumpmap lighting
if ( surfaceStage->vertexColor != SVC_IGNORE ) {
common->Printf( "shader %s: vertexColor on a bump stage\n",
surfaceShader->GetName() );
}
// check for RGBA modulations in the stage, which are also illegal?
// save the bump map stage for the specular calculation and diffuse
// error checking
lastBumpStage = surfaceStage;
//
// ambient lights combine non-directional bump and falloff
// and write to the alpha channel
//
if ( lightShader->IsAmbientLight() ) {
GL_State( GLS_COLORMASK | GLS_DEPTHMASK | backEnd.depthFunc );
// texture 0 will be the per-surface bump map
GL_SelectTexture( 0 );
qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
RB_BindStageTexture( surfaceRegs, &surfaceStage->texture, surf );
// development aid
if ( r_skipBump.GetBool() ) {
globalImages->flatNormalMap->Bind();
}
// texture 1 will be the light falloff
GL_SelectTexture( 1 );
qglEnable( GL_TEXTURE_GEN_S );
qglTexGenfv( GL_S, GL_OBJECT_PLANE, lightProject[3].ToFloatPtr() );
qglTexCoord2f( 0, 0.5 );
vLight->falloffImage->Bind();
qglCombinerParameteriNV( GL_NUM_GENERAL_COMBINERS_NV, 2 );
// set the constant color to a bit of an angle
qglCombinerParameterfvNV( GL_CONSTANT_COLOR0_NV, tr.ambientLightVector.ToFloatPtr() );
// stage 0 sets primary_color = bump dot constant color
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_CONSTANT_COLOR0_NV, GL_EXPAND_NORMAL_NV, GL_RGB );
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_TEXTURE0_ARB, GL_EXPAND_NORMAL_NV, GL_RGB );
qglCombinerOutputNV( GL_COMBINER0_NV, GL_RGB,
GL_PRIMARY_COLOR_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_TRUE, GL_FALSE, GL_FALSE );
// stage 1 alpha sets primary_color = primary_color * falloff
qglCombinerInputNV( GL_COMBINER1_NV, GL_ALPHA, GL_VARIABLE_A_NV,
GL_PRIMARY_COLOR_NV, GL_UNSIGNED_IDENTITY_NV, GL_BLUE );
qglCombinerInputNV( GL_COMBINER1_NV, GL_ALPHA, GL_VARIABLE_B_NV,
GL_TEXTURE1_ARB, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA );
qglCombinerOutputNV( GL_COMBINER1_NV, GL_ALPHA,
GL_PRIMARY_COLOR_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE );
// final combiner takes the result for the alpha channel
qglFinalCombinerInputNV( GL_VARIABLE_A_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_B_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_C_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_D_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_G_NV, GL_PRIMARY_COLOR_NV,
GL_UNSIGNED_IDENTITY_NV, GL_ALPHA );
// draw it
RB_DrawElementsWithCounters( tri );
globalImages->BindNull();
qglDisable( GL_TEXTURE_GEN_S );
GL_SelectTexture( 0 );
RB_FinishStageTexture( &surfaceStage->texture, surf );
continue;
}
//
// draw light falloff to the alpha channel
//
GL_State( GLS_COLORMASK | GLS_DEPTHMASK | backEnd.depthFunc );
qglDisableClientState( GL_TEXTURE_COORD_ARRAY );
qglDisableClientState( GL_COLOR_ARRAY );
qglEnable( GL_TEXTURE_GEN_S );
qglTexGenfv( GL_S, GL_OBJECT_PLANE, lightProject[3].ToFloatPtr() );
qglTexCoord2f( 0, 0.5 );
vLight->falloffImage->Bind();
// make sure a combiner output doesn't step on the texture
qglCombinerParameteriNV( GL_NUM_GENERAL_COMBINERS_NV, 1 );
qglCombinerOutputNV( GL_COMBINER0_NV, GL_ALPHA,
GL_DISCARD_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE );
// final combiner
qglFinalCombinerInputNV( GL_VARIABLE_A_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_B_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_C_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_D_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_G_NV, GL_TEXTURE0_ARB,
GL_UNSIGNED_IDENTITY_NV, GL_ALPHA );
// draw it
RB_DrawElementsWithCounters( tri );
qglDisable( GL_TEXTURE_GEN_S );
//
// draw the bump map result onto the alpha channel
//
GL_State( GLS_SRCBLEND_DST_ALPHA | GLS_DSTBLEND_ZERO | GLS_COLORMASK | GLS_DEPTHMASK
| backEnd.depthFunc );
// texture 0 will be the per-surface bump map
GL_SelectTexture( 0 );
qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
RB_BindStageTexture( surfaceRegs, &surfaceStage->texture, surf );
// texture 1 is the normalization cube map
// the texccords are the non-normalized vector towards the light origin
GL_SelectTexture( 1 );
globalImages->normalCubeMapImage->Bind();
qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
qglTexCoordPointer( 3, GL_FLOAT, sizeof( lightingCache_t ), ((lightingCache_t *)vertexCache.Position(tri->lightingCache))->localLightVector.ToFloatPtr() );
qglDisableClientState( GL_COLOR_ARRAY );
// program the nvidia register combiners
// I just want alpha = Dot( texture0, texture1 )
qglCombinerParameteriNV( GL_NUM_GENERAL_COMBINERS_NV, 1 );
// stage 0 rgb performs the dot product
// SPARE0 = TEXTURE0 dot TEXTURE1
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_TEXTURE1_ARB, GL_EXPAND_NORMAL_NV, GL_RGB );
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_TEXTURE0_ARB, GL_EXPAND_NORMAL_NV, GL_RGB );
qglCombinerOutputNV( GL_COMBINER0_NV, GL_RGB,
GL_SPARE0_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_TRUE, GL_FALSE, GL_FALSE );
// final combiner just takes the dot result and puts it in alpha
qglFinalCombinerInputNV( GL_VARIABLE_G_NV, GL_SPARE0_NV,
GL_UNSIGNED_IDENTITY_NV, GL_BLUE );
// draw it
RB_DrawElementsWithCounters( tri );
globalImages->BindNull();
qglDisableClientState( GL_TEXTURE_COORD_ARRAY );
GL_SelectTexture( 0 );
RB_FinishStageTexture( &surfaceStage->texture, surf );
continue;
}
if ( surfaceStage->lighting == SL_DIFFUSE ) {
if ( !lastBumpStage ) {
common->Printf( "shader %s: diffuse stage without a preceeding bumpmap stage\n",
surfaceShader->GetName() );
continue;
}
}
//-----------------------------------------------------
//
// specular exponent modification of the bump / falloff
//
//-----------------------------------------------------
if ( surfaceStage->lighting == SL_SPECULAR ) {
// put specular bump map into alpha channel, then treat as a diffuse
// allow the specular to be skipped as a user speed optimization
if ( r_skipSpecular.GetBool() ) {
continue;
}
// ambient lights don't have specular
if ( lightShader->IsAmbientLight() ) {
continue;
}
if ( !lastBumpStage ) {
common->Printf( "shader %s: specular stage without a preceeding bumpmap stage\n",
surfaceShader->GetName() );
continue;
}
GL_State( GLS_SRCBLEND_DST_ALPHA | GLS_DSTBLEND_SRC_ALPHA | GLS_COLORMASK | GLS_DEPTHMASK
| backEnd.depthFunc );
// texture 0 will be the per-surface bump map
GL_SelectTexture( 0 );
qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
RB_BindStageTexture( surfaceRegs, &lastBumpStage->texture, surf );
// development aid
if ( r_skipBump.GetBool() ) {
globalImages->flatNormalMap->Bind();
}
// texture 1 is the normalization cube map
// indexed by the dynamic halfangle texcoords
GL_SelectTexture( 1 );
globalImages->normalCubeMapImage->Bind();
qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
qglTexCoordPointer( 4, GL_FLOAT, 0, vertexCache.Position( surf->dynamicTexCoords ) );
// program the nvidia register combiners
qglCombinerParameteriNV( GL_NUM_GENERAL_COMBINERS_NV, 2 );
// stage 0 rgb performs the dot product
// GL_PRIMARY_COLOR_NV = ( TEXTURE0 dot TEXTURE1 - 0.5 ) * 2
// the scale and bias steepen the specular curve
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_TEXTURE1_ARB, GL_EXPAND_NORMAL_NV, GL_RGB );
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_TEXTURE0_ARB, GL_EXPAND_NORMAL_NV, GL_RGB );
qglCombinerOutputNV( GL_COMBINER0_NV, GL_RGB,
GL_PRIMARY_COLOR_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_SCALE_BY_TWO_NV, GL_BIAS_BY_NEGATIVE_ONE_HALF_NV, GL_TRUE, GL_FALSE, GL_FALSE );
// stage 0 alpha does nothing
qglCombinerOutputNV( GL_COMBINER0_NV, GL_ALPHA,
GL_DISCARD_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE );
// stage 1 rgb does nothing
qglCombinerOutputNV( GL_COMBINER1_NV, GL_RGB,
GL_PRIMARY_COLOR_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE );
// stage 1 alpha takes bump * bump
// PRIMARY_COLOR = ( GL_PRIMARY_COLOR_NV * GL_PRIMARY_COLOR_NV - 0.5 ) * 2
// the scale and bias steepen the specular curve
qglCombinerInputNV( GL_COMBINER1_NV, GL_ALPHA, GL_VARIABLE_A_NV,
GL_PRIMARY_COLOR_NV, GL_UNSIGNED_IDENTITY_NV, GL_BLUE );
qglCombinerInputNV( GL_COMBINER1_NV, GL_ALPHA, GL_VARIABLE_B_NV,
GL_PRIMARY_COLOR_NV, GL_UNSIGNED_IDENTITY_NV, GL_BLUE );
qglCombinerOutputNV( GL_COMBINER1_NV, GL_ALPHA,
GL_PRIMARY_COLOR_NV, GL_DISCARD_NV, GL_DISCARD_NV,
GL_SCALE_BY_TWO_NV, GL_BIAS_BY_NEGATIVE_ONE_HALF_NV, GL_FALSE, GL_FALSE, GL_FALSE );
// final combiner
qglFinalCombinerInputNV( GL_VARIABLE_D_NV, GL_PRIMARY_COLOR_NV,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_A_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_B_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_C_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_G_NV, GL_PRIMARY_COLOR_NV,
GL_UNSIGNED_IDENTITY_NV, GL_ALPHA );
// draw it
RB_DrawElementsWithCounters( tri );
globalImages->BindNull();
qglDisableClientState( GL_TEXTURE_COORD_ARRAY );
GL_SelectTexture( 0 );
RB_FinishStageTexture( &lastBumpStage->texture, surf );
// the bump map in the alpha channel is now corrupted, so a normal diffuse
// map can't be drawn unless a new bumpmap is put down
lastBumpStage = NULL;
// fall through to the common handling of diffuse and specular projected lighting
}
//-----------------------------------------------------
//
// projected light / surface color for diffuse and specular maps
//
//-----------------------------------------------------
if ( surfaceStage->lighting == SL_DIFFUSE || surfaceStage->lighting == SL_SPECULAR ) {
// don't trash alpha
GL_State( GLS_SRCBLEND_DST_ALPHA | GLS_DSTBLEND_ONE | GLS_ALPHAMASK | GLS_DEPTHMASK
| backEnd.depthFunc );
// texture 0 will get the surface color texture
GL_SelectTexture( 0 );
qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
RB_BindStageTexture( surfaceRegs, &surfaceStage->texture, surf );
// development aid
if ( ( surfaceStage->lighting == SL_DIFFUSE && r_skipDiffuse.GetBool() )
|| ( surfaceStage->lighting == SL_SPECULAR && r_skipSpecular.GetBool() ) ) {
globalImages->blackImage->Bind();
}
// texture 1 will get the light projected texture
GL_SelectTexture( 1 );
qglDisableClientState( GL_TEXTURE_COORD_ARRAY );
qglEnable( GL_TEXTURE_GEN_S );
qglEnable( GL_TEXTURE_GEN_T );
qglEnable( GL_TEXTURE_GEN_Q );
qglTexGenfv( GL_S, GL_OBJECT_PLANE, lightProject[0].ToFloatPtr() );
qglTexGenfv( GL_T, GL_OBJECT_PLANE, lightProject[1].ToFloatPtr() );
qglTexGenfv( GL_Q, GL_OBJECT_PLANE, lightProject[2].ToFloatPtr() );
// texture0 * texture1 * primaryColor * constantColor
qglCombinerParameteriNV( GL_NUM_GENERAL_COMBINERS_NV, 1 );
// SPARE0 = TEXTURE0 * PRIMARY_COLOR
// SPARE1 = TEXTURE1 * CONSTANT_COLOR
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_TEXTURE0_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB );
// variable B will be overriden based on the stage vertexColor option
if ( surfaceStage->vertexColor == SVC_MODULATE ) {
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_PRIMARY_COLOR_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglEnableClientState( GL_COLOR_ARRAY );
} else if ( surfaceStage->vertexColor == SVC_INVERSE_MODULATE ) {
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_PRIMARY_COLOR_NV, GL_UNSIGNED_INVERT_NV, GL_RGB );
qglEnableClientState( GL_COLOR_ARRAY );
} else { // SVC_IGNORE
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_ZERO, GL_UNSIGNED_INVERT_NV, GL_RGB );
qglDisableClientState( GL_COLOR_ARRAY );
}
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_C_NV,
GL_TEXTURE1_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglCombinerInputNV( GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_D_NV,
GL_CONSTANT_COLOR1_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglCombinerOutputNV( GL_COMBINER0_NV, GL_RGB,
GL_SPARE0_NV, GL_SPARE1_NV, GL_DISCARD_NV,
GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE );
// final combiner
qglFinalCombinerInputNV( GL_VARIABLE_A_NV, GL_SPARE1_NV,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_B_NV, GL_SPARE0_NV,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_C_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_D_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_RGB );
qglFinalCombinerInputNV( GL_VARIABLE_G_NV, GL_ZERO,
GL_UNSIGNED_IDENTITY_NV, GL_ALPHA );
// for all light stages, multiply the projected color by the surface
// color, and blend with the framebuffer
for ( int j = 0 ; j < lightShader->GetNumStages() ; j++ ) {
const shaderStage_t *lightStage = lightShader->GetStage( j );
float color[4];
// ignore stages that fail the condition
if ( !lightRegs[ lightStage->conditionRegister ] ) {
continue;
}
// set the color to the light color times the surface color
color[0] = backEnd.lightScale
* lightRegs[ lightStage->color.registers[0] ]
* surfaceRegs[ surfaceStage->color.registers[0] ];
color[1] = backEnd.lightScale
* lightRegs[ lightStage->color.registers[1] ]
* surfaceRegs[ surfaceStage->color.registers[1] ];
color[2] = backEnd.lightScale
* lightRegs[ lightStage->color.registers[2] ]
* surfaceRegs[ surfaceStage->color.registers[2] ];
color[3] = 1;
// don't draw if it would be all black
if ( color[0] == 0 && color[1] == 0 && color[2] == 0 ) {
continue;
}
qglCombinerParameterfvNV( GL_CONSTANT_COLOR1_NV, color );
RB_BindStageTexture( lightRegs, &lightStage->texture, surf );
RB_DrawElementsWithCounters( tri );
RB_FinishStageTexture( &lightStage->texture, surf );
}
if ( surfaceStage->vertexColor != SVC_IGNORE ) {
qglDisableClientState( GL_COLOR_ARRAY );
}
qglDisable( GL_TEXTURE_GEN_S );
qglDisable( GL_TEXTURE_GEN_T );
qglDisable( GL_TEXTURE_GEN_Q );
globalImages->BindNull();
GL_SelectTexture( 0 );
RB_FinishStageTexture( &surfaceStage->texture, surf );
continue;
}
}
// unhack depth range if needed
if ( surf->space->weaponDepthHack || surf->space->modelDepthHack != 0.0f ) {
RB_LeaveDepthHack();
}
}
/*
=============
RB_CreateSingleDrawInteractions
This can be used by different draw_* backends to decompose a complex light / surface
interaction into primitive interactions
=============
*/
void RB_CreateSingleDrawInteractions( const drawSurf_t *surf, void (*DrawInteraction)(const drawInteraction_t *) ) {
const idMaterial *surfaceShader = surf->material;
const float *surfaceRegs = surf->shaderRegisters;
const viewLight_t *vLight = backEnd.vLight;
const idMaterial *lightShader = vLight->lightShader;
const float *lightRegs = vLight->shaderRegisters;
drawInteraction_t inter;
if ( r_skipInteractions.GetBool() || !surf->geo || !surf->geo->ambientCache ) {
return;
}
if ( tr.logFile ) {
RB_LogComment( "---------- RB_CreateSingleDrawInteractions %s on %s ----------\n", lightShader->GetName(), surfaceShader->GetName() );
}
// change the matrix and light projection vectors if needed
if ( surf->space != backEnd.currentSpace ) {
backEnd.currentSpace = surf->space;
qglLoadMatrixf( surf->space->modelViewMatrix );
}
// change the scissor if needed
if ( r_useScissor.GetBool() && !backEnd.currentScissor.Equals( surf->scissorRect ) ) {
backEnd.currentScissor = surf->scissorRect;
qglScissor( backEnd.viewDef->viewport.x1 + backEnd.currentScissor.x1,
backEnd.viewDef->viewport.y1 + backEnd.currentScissor.y1,
backEnd.currentScissor.x2 + 1 - backEnd.currentScissor.x1,
backEnd.currentScissor.y2 + 1 - backEnd.currentScissor.y1 );
}
// hack depth range if needed
if ( surf->space->weaponDepthHack ) {
RB_EnterWeaponDepthHack();
}
if ( surf->space->modelDepthHack ) {
RB_EnterModelDepthHack( surf->space->modelDepthHack );
}
inter.surf = surf;
inter.lightFalloffImage = vLight->falloffImage;
R_GlobalPointToLocal( surf->space->modelMatrix, vLight->globalLightOrigin, inter.localLightOrigin.ToVec3() );
R_GlobalPointToLocal( surf->space->modelMatrix, backEnd.viewDef->renderView.vieworg, inter.localViewOrigin.ToVec3() );
inter.localLightOrigin[3] = 0;
inter.localViewOrigin[3] = 1;
inter.ambientLight = lightShader->IsAmbientLight();
// the base projections may be modified by texture matrix on light stages
idPlane lightProject[4];
for ( int i = 0 ; i < 4 ; i++ ) {
R_GlobalPlaneToLocal( surf->space->modelMatrix, backEnd.vLight->lightProject[i], lightProject[i] );
}
for ( int lightStageNum = 0 ; lightStageNum < lightShader->GetNumStages() ; lightStageNum++ ) {
const shaderStage_t *lightStage = lightShader->GetStage( lightStageNum );
// ignore stages that fail the condition
if ( !lightRegs[ lightStage->conditionRegister ] ) {
continue;
}
inter.lightImage = lightStage->texture.image;
memcpy( inter.lightProjection, lightProject, sizeof( inter.lightProjection ) );
// now multiply the texgen by the light texture matrix
if ( lightStage->texture.hasMatrix ) {
RB_GetShaderTextureMatrix( lightRegs, &lightStage->texture, backEnd.lightTextureMatrix );
RB_BakeTextureMatrixIntoTexgen( reinterpret_cast<class idPlane *>(inter.lightProjection), backEnd.lightTextureMatrix );
}
inter.bumpImage = NULL;
inter.specularImage = NULL;
inter.diffuseImage = NULL;
inter.diffuseColor[0] = inter.diffuseColor[1] = inter.diffuseColor[2] = inter.diffuseColor[3] = 0;
inter.specularColor[0] = inter.specularColor[1] = inter.specularColor[2] = inter.specularColor[3] = 0;
float lightColor[4];
// backEnd.lightScale is calculated so that lightColor[] will never exceed
// tr.backEndRendererMaxLight
lightColor[0] = backEnd.lightScale * lightRegs[ lightStage->color.registers[0] ];
lightColor[1] = backEnd.lightScale * lightRegs[ lightStage->color.registers[1] ];
lightColor[2] = backEnd.lightScale * lightRegs[ lightStage->color.registers[2] ];
lightColor[3] = lightRegs[ lightStage->color.registers[3] ];
// go through the individual stages
for ( int surfaceStageNum = 0 ; surfaceStageNum < surfaceShader->GetNumStages() ; surfaceStageNum++ ) {
const shaderStage_t *surfaceStage = surfaceShader->GetStage( surfaceStageNum );
switch( surfaceStage->lighting ) {
case SL_AMBIENT: {
// ignore ambient stages while drawing interactions
break;
}
case SL_BUMP: {
// ignore stage that fails the condition
if ( !surfaceRegs[ surfaceStage->conditionRegister ] ) {
break;
}
// draw any previous interaction
RB_SubmittInteraction( &inter, DrawInteraction );
inter.diffuseImage = NULL;
inter.specularImage = NULL;
R_SetDrawInteraction( surfaceStage, surfaceRegs, &inter.bumpImage, inter.bumpMatrix, NULL );
break;
}
case SL_DIFFUSE: {
// ignore stage that fails the condition
if ( !surfaceRegs[ surfaceStage->conditionRegister ] ) {
break;
}
if ( inter.diffuseImage ) {
RB_SubmittInteraction( &inter, DrawInteraction );
}
R_SetDrawInteraction( surfaceStage, surfaceRegs, &inter.diffuseImage,
inter.diffuseMatrix, inter.diffuseColor.ToFloatPtr() );
inter.diffuseColor[0] *= lightColor[0];
inter.diffuseColor[1] *= lightColor[1];
inter.diffuseColor[2] *= lightColor[2];
inter.diffuseColor[3] *= lightColor[3];
inter.vertexColor = surfaceStage->vertexColor;
break;
}
case SL_SPECULAR: {
// ignore stage that fails the condition
if ( !surfaceRegs[ surfaceStage->conditionRegister ] ) {
break;
}
if ( inter.specularImage ) {
RB_SubmittInteraction( &inter, DrawInteraction );
}
R_SetDrawInteraction( surfaceStage, surfaceRegs, &inter.specularImage,
inter.specularMatrix, inter.specularColor.ToFloatPtr() );
inter.specularColor[0] *= lightColor[0];
inter.specularColor[1] *= lightColor[1];
inter.specularColor[2] *= lightColor[2];
inter.specularColor[3] *= lightColor[3];
inter.vertexColor = surfaceStage->vertexColor;
break;
}
}
}
// draw the final interaction
RB_SubmittInteraction( &inter, DrawInteraction );
}
// unhack depth range if needed
if ( surf->space->weaponDepthHack || surf->space->modelDepthHack != 0.0f ) {
RB_LeaveDepthHack();
}
}
static void RB_GLSL_SubmitDrawInteractions(const viewLight_t& vLight, const InteractionList& interactionList) {
if (interactionList.IsEmpty())
return;
// perform setup here that will be constant for all interactions
GL_State( GLS_SRCBLEND_ONE | GLS_DSTBLEND_ONE | GLS_DEPTHMASK | backEnd.depthFunc );
GL_UseProgram( interactionProgram );
fhRenderProgram::SetShading( r_shading.GetInteger() );
fhRenderProgram::SetSpecularExp( r_specularExp.GetFloat() );
fhRenderProgram::SetAmbientLight( vLight.lightDef->lightShader->IsAmbientLight() ? 1 : 0 );
if (vLight.lightDef->ShadowMode() == shadowMode_t::ShadowMap) {
const idVec4 globalLightOrigin = idVec4( vLight.globalLightOrigin, 1 );
fhRenderProgram::SetGlobalLightOrigin( globalLightOrigin );
const float shadowBrightness = vLight.lightDef->ShadowBrightness();
const float shadowSoftness = vLight.lightDef->ShadowSoftness();
fhRenderProgram::SetShadowParams( idVec4( shadowSoftness, shadowBrightness, vLight.nearClip[0], vLight.farClip[0] ) );
if(vLight.lightDef->parms.parallel) {
//parallel light
fhRenderProgram::SetShadowMappingMode( 3 );
fhRenderProgram::SetPointLightProjectionMatrices( vLight.viewProjectionMatrices[0].ToFloatPtr() );
fhRenderProgram::SetShadowCoords( vLight.shadowCoords, 6 );
fhRenderProgram::SetCascadeDistances(
r_smCascadeDistance0.GetFloat(),
r_smCascadeDistance1.GetFloat(),
r_smCascadeDistance2.GetFloat(),
r_smCascadeDistance3.GetFloat(),
r_smCascadeDistance4.GetFloat());
idVec4 shadowmapSizes[6] = {
idVec4(vLight.nearClip[0], vLight.farClip[0], vLight.width[0], vLight.height[0]),
idVec4(vLight.nearClip[1], vLight.farClip[1], vLight.width[1], vLight.height[1]),
idVec4(vLight.nearClip[2], vLight.farClip[2], vLight.width[2], vLight.height[2]),
idVec4(vLight.nearClip[3], vLight.farClip[3], vLight.width[3], vLight.height[3]),
idVec4(vLight.nearClip[4], vLight.farClip[4], vLight.width[4], vLight.height[4]),
idVec4(vLight.nearClip[5], vLight.farClip[5], vLight.width[5], vLight.height[5])
};
fhRenderProgram::SetShadowMapSize(shadowmapSizes, 6);
}
else if (vLight.lightDef->parms.pointLight) {
//point light
fhRenderProgram::SetShadowMappingMode( 1 );
fhRenderProgram::SetPointLightProjectionMatrices( vLight.viewProjectionMatrices[0].ToFloatPtr() );
fhRenderProgram::SetShadowCoords(vLight.shadowCoords, 6);
{
const idMat3 axis = vLight.lightDef->parms.axis;
float viewerMatrix[16];
viewerMatrix[0] = axis[0][0];
viewerMatrix[4] = axis[0][1];
viewerMatrix[8] = axis[0][2];
viewerMatrix[12] = 0;
viewerMatrix[1] = axis[1][0];
viewerMatrix[5] = axis[1][1];
viewerMatrix[9] = axis[1][2];
viewerMatrix[13] = 0;
viewerMatrix[2] = axis[2][0];
viewerMatrix[6] = axis[2][1];
viewerMatrix[10] = axis[2][2];
viewerMatrix[14] = 0;
viewerMatrix[3] = 0;
viewerMatrix[7] = 0;
viewerMatrix[11] = 0;
viewerMatrix[15] = 1;
fhRenderProgram::SetInverseLightRotation( viewerMatrix );
}
}
else {
//projected light
fhRenderProgram::SetShadowMappingMode( 2 );
fhRenderProgram::SetSpotLightProjectionMatrix( vLight.viewProjectionMatrices[0].ToFloatPtr() );
fhRenderProgram::SetShadowCoords(vLight.shadowCoords, 1);
}
}
else {
//no shadows
fhRenderProgram::SetShadowMappingMode( 0 );
}
//make sure depth hacks are disabled
//FIXME(johl): why is (sometimes) a depth hack enabled at this point?
RB_LeaveDepthHack();
fhRenderProgram::SetProjectionMatrix( backEnd.viewDef->projectionMatrix );
fhRenderProgram::SetPomMaxHeight( -1 );
const viewEntity_t* currentSpace = nullptr;
stageVertexColor_t currentVertexColor = (stageVertexColor_t)-1;
bool currentPomEnabled = false;
idScreenRect currentScissor;
bool depthHackActive = false;
bool currentHasBumpMatrix = false;
bool currentHasDiffuseMatrix = false;
bool currentHasSpecularMatrix = false;
idVec4 currentDiffuseColor = idVec4( 1, 1, 1, 1 );
idVec4 currentSpecularColor = idVec4( 1, 1, 1, 1 );
fhRenderProgram::SetDiffuseColor( currentDiffuseColor );
fhRenderProgram::SetSpecularColor( currentSpecularColor );
fhRenderProgram::SetBumpMatrix( idVec4::identityS, idVec4::identityT );
fhRenderProgram::SetSpecularMatrix( idVec4::identityS, idVec4::identityT );
fhRenderProgram::SetDiffuseMatrix( idVec4::identityS, idVec4::identityT );
glDepthRange(0, 1);
if (r_useScissor.GetBool()) {
auto fb = fhFramebuffer::GetCurrentDrawBuffer();
glScissor( 0, 0, fb->GetWidth(), fb->GetHeight() );
currentScissor.x1 = 0;
currentScissor.y1 = 0;
currentScissor.x2 = fb->GetWidth();
currentScissor.y2 = fb->GetHeight();
}
const int num = interactionList.Num();
for (int i = 0; i < num; ++i) {
const auto& din = interactionList[i];
const auto offset = vertexCache.Bind( din.surf->geo->ambientCache );
GL_SetupVertexAttributes( fhVertexLayout::Draw, offset );
if (currentSpace != din.surf->space) {
fhRenderProgram::SetModelMatrix( din.surf->space->modelMatrix );
fhRenderProgram::SetModelViewMatrix( din.surf->space->modelViewMatrix );
if (din.surf->space->modelDepthHack) {
RB_EnterModelDepthHack( din.surf->space->modelDepthHack );
fhRenderProgram::SetProjectionMatrix( GL_ProjectionMatrix.Top() );
depthHackActive = true;
}
else if (din.surf->space->weaponDepthHack) {
RB_EnterWeaponDepthHack();
fhRenderProgram::SetProjectionMatrix( GL_ProjectionMatrix.Top() );
depthHackActive = true;
}
else if (depthHackActive) {
RB_LeaveDepthHack();
fhRenderProgram::SetProjectionMatrix( GL_ProjectionMatrix.Top() );
depthHackActive = false;
}
// change the scissor if needed
if (r_useScissor.GetBool() && !currentScissor.Equals( din.surf->scissorRect )) {
currentScissor = din.surf->scissorRect;
glScissor( backEnd.viewDef->viewport.x1 + currentScissor.x1,
backEnd.viewDef->viewport.y1 + currentScissor.y1,
currentScissor.x2 + 1 - currentScissor.x1,
currentScissor.y2 + 1 - currentScissor.y1 );
}
currentSpace = din.surf->space;
}
fhRenderProgram::SetLocalLightOrigin( din.localLightOrigin );
fhRenderProgram::SetLocalViewOrigin( din.localViewOrigin );
fhRenderProgram::SetLightProjectionMatrix( din.lightProjection[0], din.lightProjection[1], din.lightProjection[2] );
fhRenderProgram::SetLightFallOff( din.lightProjection[3] );
if (din.hasBumpMatrix) {
fhRenderProgram::SetBumpMatrix( din.bumpMatrix[0], din.bumpMatrix[1] );
currentHasBumpMatrix = true;
}
else if (currentHasBumpMatrix) {
fhRenderProgram::SetBumpMatrix( idVec4::identityS, idVec4::identityT );
currentHasBumpMatrix = false;
}
if (din.hasDiffuseMatrix) {
fhRenderProgram::SetDiffuseMatrix( din.diffuseMatrix[0], din.diffuseMatrix[1] );
currentHasDiffuseMatrix = true;
}
else if (currentHasDiffuseMatrix) {
fhRenderProgram::SetDiffuseMatrix( idVec4::identityS, idVec4::identityT );
currentHasDiffuseMatrix = false;
}
if (din.hasSpecularMatrix) {
fhRenderProgram::SetSpecularMatrix( din.specularMatrix[0], din.specularMatrix[1] );
currentHasSpecularMatrix = true;
}
else if (currentHasSpecularMatrix) {
fhRenderProgram::SetSpecularMatrix( idVec4::identityS, idVec4::identityT );
currentHasSpecularMatrix = false;
}
if (currentVertexColor != din.vertexColor) {
switch (din.vertexColor) {
case SVC_IGNORE:
fhRenderProgram::SetColorModulate( idVec4::zero );
fhRenderProgram::SetColorAdd( idVec4::one );
break;
case SVC_MODULATE:
fhRenderProgram::SetColorModulate( idVec4::one );
fhRenderProgram::SetColorAdd( idVec4::zero );
break;
case SVC_INVERSE_MODULATE:
fhRenderProgram::SetColorModulate( idVec4::negOne );
fhRenderProgram::SetColorAdd( idVec4::one );
break;
}
currentVertexColor = din.vertexColor;
}
if (din.diffuseColor != currentDiffuseColor) {
fhRenderProgram::SetDiffuseColor( din.diffuseColor );
currentDiffuseColor = din.diffuseColor;
}
if (din.specularColor != currentSpecularColor) {
fhRenderProgram::SetSpecularColor( din.specularColor );
currentSpecularColor = din.specularColor;
}
const bool pomEnabled = r_pomEnabled.GetBool() && din.specularImage->hasAlpha;
if (pomEnabled != currentPomEnabled) {
if (pomEnabled) {
fhRenderProgram::SetPomMaxHeight( r_pomMaxHeight.GetFloat() );
}
else {
fhRenderProgram::SetPomMaxHeight( -1 );
}
}
fhRenderProgram::SetNormalMapEncoding( RB_GetNormalEncoding( din.bumpImage ) );
din.bumpImage->Bind( 1 );
din.lightFalloffImage->Bind( 2 );
din.lightImage->Bind( 3 );
din.diffuseImage->Bind( 4 );
din.specularImage->Bind( 5 );
// draw it
backEnd.stats.groups[backEndGroup::Interaction].drawcalls += 1;
backEnd.stats.groups[backEndGroup::Interaction].tris += din.surf->geo->numIndexes / 3;
RB_DrawElementsWithCounters( din.surf->geo );
}
if (depthHackActive) {
RB_LeaveDepthHack();
fhRenderProgram::SetProjectionMatrix( GL_ProjectionMatrix.Top() );
}
if (r_useScissor.GetBool()) {
auto fb = fhFramebuffer::GetCurrentDrawBuffer();
glScissor( 0, 0, fb->GetWidth(), fb->GetHeight() );
backEnd.currentScissor.x1 = 0;
backEnd.currentScissor.y1 = 0;
backEnd.currentScissor.x2 = fb->GetWidth();
backEnd.currentScissor.y2 = fb->GetHeight();
}
}
