/* =================== R_ColorByStencilBuffer Sets the screen colors based on the contents of the stencil buffer. Stencil of 0 = black, 1 = red, 2 = green, 3 = blue, ..., 7+ = white =================== */ static void R_ColorByStencilBuffer() { int i; static float colors[8][3] = { {0,0,0}, {1,0,0}, {0,1,0}, {0,0,1}, {0,1,1}, {1,0,1}, {1,1,0}, {1,1,1}, }; // clear color buffer to white (>6 passes) GL_Clear( true, false, false, 0, 1.0f, 1.0f, 1.0f, 1.0f ); // now draw color for each stencil value qglStencilOp( GL_KEEP, GL_KEEP, GL_KEEP ); for ( i = 0; i < 6; i++ ) { GL_Color( colors[i] ); renderProgManager.BindShader_Color(); qglStencilFunc( GL_EQUAL, i, 255 ); RB_PolygonClear(); } qglStencilFunc( GL_ALWAYS, 0, 255 ); }
/* ===================== RB_StencilShadowPass Stencil test should already be enabled, and the stencil buffer should have been set to 128 on any surfaces that might receive shadows ===================== */ void RB_StencilShadowPass(const drawSurf_t *drawSurfs) { if (!r_shadows.GetBool()) { return; } if (!drawSurfs) { return; } RB_LogComment("---------- RB_StencilShadowPass ----------\n"); globalImages->BindNull(); qglDisableClientState(GL_TEXTURE_COORD_ARRAY); // for visualizing the shadows if (r_showShadows.GetInteger()) { if (r_showShadows.GetInteger() == 2) { // draw filled in GL_State(GLS_DEPTHMASK | GLS_SRCBLEND_ONE | GLS_DSTBLEND_ONE | GLS_DEPTHFUNC_LESS); } else { // draw as lines, filling the depth buffer GL_State(GLS_SRCBLEND_ONE | GLS_DSTBLEND_ZERO | GLS_POLYMODE_LINE | GLS_DEPTHFUNC_ALWAYS); } } else { // don't write to the color buffer, just the stencil buffer GL_State(GLS_DEPTHMASK | GLS_COLORMASK | GLS_ALPHAMASK | GLS_DEPTHFUNC_LESS); } if (r_shadowPolygonFactor.GetFloat() || r_shadowPolygonOffset.GetFloat()) { qglPolygonOffset(r_shadowPolygonFactor.GetFloat(), -r_shadowPolygonOffset.GetFloat()); qglEnable(GL_POLYGON_OFFSET_FILL); } qglStencilFunc(GL_ALWAYS, 1, 255); if (glConfig.depthBoundsTestAvailable && r_useDepthBoundsTest.GetBool()) { qglEnable(GL_DEPTH_BOUNDS_TEST_EXT); } RB_RenderDrawSurfChainWithFunction(drawSurfs, RB_T_Shadow); GL_Cull(CT_FRONT_SIDED); if (r_shadowPolygonFactor.GetFloat() || r_shadowPolygonOffset.GetFloat()) { qglDisable(GL_POLYGON_OFFSET_FILL); } if (glConfig.depthBoundsTestAvailable && r_useDepthBoundsTest.GetBool()) { qglDisable(GL_DEPTH_BOUNDS_TEST_EXT); } qglEnableClientState(GL_TEXTURE_COORD_ARRAY); qglStencilFunc(GL_GEQUAL, 128, 255); qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); }
/* ================== RB_RenderViewLight ================== */ static void RB_RenderViewLight(viewLight_t *vLight) { backEnd.vLight = vLight; // do fogging later if (vLight->lightShader->IsFogLight()) { return; } if (vLight->lightShader->IsBlendLight()) { return; } RB_LogComment("---------- RB_RenderViewLight 0x%p ----------\n", vLight); // clear the stencil buffer if needed if (vLight->globalShadows || vLight->localShadows) { backEnd.currentScissor = vLight->scissorRect; if (r_useScissor.GetBool()) { 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); } qglClear(GL_STENCIL_BUFFER_BIT); } else { // no shadows, so no need to read or write the stencil buffer // we might in theory want to use GL_ALWAYS instead of disabling // completely, to satisfy the invarience rules qglStencilFunc(GL_ALWAYS, 128, 255); } backEnd.depthFunc = GLS_DEPTHFUNC_EQUAL; RB_StencilShadowPass(vLight->globalShadows); RB_CreateDrawInteractions(vLight->localInteractions); RB_StencilShadowPass(vLight->localShadows); RB_CreateDrawInteractions(vLight->globalInteractions); if (r_skipTranslucent.GetBool()) { return; } // disable stencil testing for translucent interactions, because // the shadow isn't calculated at their point, and the shadow // behind them may be depth fighting with a back side, so there // isn't any reasonable thing to do qglStencilFunc(GL_ALWAYS, 128, 255); backEnd.depthFunc = GLS_DEPTHFUNC_LESS; RB_CreateDrawInteractions(vLight->translucentInteractions); }
/* ================= RB_ShadowFinish Darken everything that is is a shadow volume. We have to delay this until everything has been shadowed, because otherwise shadows from different body parts would overlap and double darken. ================= */ void RB_ShadowFinish( void ) { if ( r_shadows->integer != 2 ) { return; } if ( glConfig.stencilBits < 4 ) { return; } qglEnable( GL_STENCIL_TEST ); qglStencilFunc( GL_NOTEQUAL, 0, 255 ); qglDisable( GL_CLIP_PLANE0 ); qglDisable( GL_CULL_FACE ); GL_Bind( tr.whiteImage ); qglLoadIdentity(); qglColor3f( 0.6f, 0.6f, 0.6f ); GL_State( GLS_DEPTHMASK_TRUE | GLS_SRCBLEND_DST_COLOR | GLS_DSTBLEND_ZERO ); // qglColor3f( 1, 0, 0 ); // GL_State( GLS_DEPTHMASK_TRUE | GLS_SRCBLEND_ONE | GLS_DSTBLEND_ZERO ); qglBegin( GL_QUADS ); qglVertex3f( -100, 100, -10 ); qglVertex3f( 100, 100, -10 ); qglVertex3f( 100, -100, -10 ); qglVertex3f( -100, -100, -10 ); qglEnd(); qglColor4f( 1,1,1,1 ); qglDisable( GL_STENCIL_TEST ); }
/* ================= RB_ShadowFinish Darken everything that is is a shadow volume. We have to delay this until everything has been shadowed, because otherwise shadows from different body parts would overlap and double darken. ================= */ void RB_ShadowFinish( void ) { #if defined(VV_LIGHTING) && defined(_XBOX) StencilShadower.FinishShadows(); #else if ( r_shadows->integer != 2 ) { return; } if ( glConfig.stencilBits < 4 ) { return; } #ifdef _DEBUG_STENCIL_SHADOWS return; #endif qglEnable( GL_STENCIL_TEST ); qglStencilFunc( GL_NOTEQUAL, 0, 255 ); qglStencilOp( GL_KEEP, GL_KEEP, GL_KEEP ); bool planeZeroBack = false; if (qglIsEnabled(GL_CLIP_PLANE0)) { planeZeroBack = true; qglDisable (GL_CLIP_PLANE0); } GL_Cull(CT_TWO_SIDED); //qglDisable (GL_CULL_FACE); GL_Bind( tr.whiteImage ); qglPushMatrix(); qglLoadIdentity (); // qglColor3f( 0.6f, 0.6f, 0.6f ); // GL_State( GLS_DEPTHMASK_TRUE | GLS_SRCBLEND_DST_COLOR | GLS_DSTBLEND_ZERO ); // qglColor3f( 1, 0, 0 ); // GL_State( GLS_DEPTHMASK_TRUE | GLS_SRCBLEND_ONE | GLS_DSTBLEND_ZERO ); qglColor4f( 0.0f, 0.0f, 0.0f, 0.5f ); //GL_State( GLS_DEPTHMASK_TRUE | GLS_SRCBLEND_SRC_ALPHA | GLS_DSTBLEND_ONE_MINUS_SRC_ALPHA ); GL_State( GLS_SRCBLEND_SRC_ALPHA | GLS_DSTBLEND_ONE_MINUS_SRC_ALPHA ); qglBegin( GL_QUADS ); qglVertex3f( -100, 100, -10 ); qglVertex3f( 100, 100, -10 ); qglVertex3f( 100, -100, -10 ); qglVertex3f( -100, -100, -10 ); qglEnd (); qglColor4f(1,1,1,1); qglDisable( GL_STENCIL_TEST ); if (planeZeroBack) { qglEnable (GL_CLIP_PLANE0); } qglPopMatrix(); #endif // VV_LIGHTING && _XBOX }
// stencil_surf0: clear stencil; draw, incrementing stencil where stencil == 0 // stencil_surf1: draw, incrementing stencil where stencil == 1 // ... // stencil_surfN: draw, incrementing stencil where stencil == N // draw_surfN: disable stencil write, color where stencil == N+1 // ... // draw_surf1: color where stencil == 2 // draw_surf0: color where stencil == 1, disable stencil test void const* RB_StencilSurf(void const* data) { stencilSurfCommand_t const* const cmd = (stencilSurfCommand_t const* const)data; // Finish any 2D drawing if needed if(tess.numIndexes) RB_EndSurface(); backEnd.refdef = cmd->refdef; backEnd.viewParms = cmd->viewParms; if(r_subviewStencil->integer) { // First stencil surface for this view if(0 == backEnd.stencil_level) { assert(qfalse == backEnd.stencil_draw); qglClear(GL_STENCIL_BUFFER_BIT); qglEnable(GL_STENCIL_TEST); backEnd.stencil_test = qtrue; // sfail/dpfail: KEEP, dppass: INCR qglStencilOp(GL_KEEP, GL_KEEP, GL_INCR); backEnd.stencil_draw = qtrue; } qglStencilFunc(GL_EQUAL, backEnd.stencil_level, ~0U); backEnd.stencil_level++; RB_RenderDrawSurfList(cmd->drawSurf, 1); backEnd.pc.c_stencilSurfaces++; } return cmd + 1; }
void GLRB_ShadowSilhouette( const float* edges, int edgeCount ) { GL_Bind( tr.whiteImage ); qglEnable( GL_CULL_FACE ); GL_State( GLS_SRCBLEND_ONE | GLS_DSTBLEND_ZERO ); qglColor3f( 0.2f, 0.2f, 0.2f ); // don't write to the color buffer qglColorMask( GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE ); qglEnable( GL_STENCIL_TEST ); qglStencilFunc( GL_ALWAYS, 1, 255 ); // mirrors have the culling order reversed GL_Cull( CT_BACK_SIDED ); // @pjb: resolves to GL_FRONT if to mirror flag is set qglStencilOp( GL_KEEP, GL_KEEP, GL_INCR ); RenderShadowEdges( edges, edgeCount ); GL_Cull( CT_FRONT_SIDED ); // @pjb: resolves to GL_BACK due to mirror flag is set qglStencilOp( GL_KEEP, GL_KEEP, GL_DECR ); RenderShadowEdges( edges, edgeCount ); // reenable writing to the color buffer qglColorMask( GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE ); }
/* ================= RB_ShadowFinish Darken everything that is is a shadow volume. We have to delay this until everything has been shadowed, because otherwise shadows from different body parts would overlap and double darken. ================= */ void RB_ShadowFinish(void) { if (r_shadows->integer != 2) { return; } if (glConfig.stencilBits < 4) { return; } qglEnable(GL_STENCIL_TEST); qglStencilFunc(GL_NOTEQUAL, 0, 255); qglDisable(GL_CLIP_PLANE0); qglDisable(GL_CULL_FACE); GL_Bind(tr.whiteImage); qglLoadIdentity(); qglColor3f(0.6f, 0.6f, 0.6f); GL_State(GLS_DEPTHMASK_TRUE | GLS_SRCBLEND_DST_COLOR | GLS_DSTBLEND_ZERO); GLboolean text = qglIsEnabled(GL_TEXTURE_COORD_ARRAY); GLboolean glcol = qglIsEnabled(GL_COLOR_ARRAY); if (text) { qglDisableClientState(GL_TEXTURE_COORD_ARRAY); } if (glcol) { qglDisableClientState(GL_COLOR_ARRAY); } GLfloat vtx[] = { -100, 100, -10, 100, 100, -10, 100, -100, -10, -100, -100, -10 }; qglVertexPointer(3, GL_FLOAT, 0, vtx); qglDrawArrays(GL_TRIANGLE_FAN, 0, 4); if (text) { qglEnableClientState(GL_TEXTURE_COORD_ARRAY); } if (glcol) { qglEnableClientState(GL_COLOR_ARRAY); } qglColor4f(1, 1, 1, 1); qglDisable(GL_STENCIL_TEST); }
/* ================== RB_STD_FogAllLights ================== */ void RB_STD_FogAllLights( void ) { viewLight_t *vLight; if ( r_skipFogLights.GetBool() || r_showOverDraw.GetInteger() != 0 || backEnd.viewDef->isXraySubview /* dont fog in xray mode*/ ) { return; } qglDisable( GL_STENCIL_TEST ); for ( vLight = backEnd.viewDef->viewLights ; vLight ; vLight = vLight->next ) { backEnd.vLight = vLight; if ( !vLight->lightShader->IsFogLight() && !vLight->lightShader->IsBlendLight() ) { continue; } #if 0 // _D3XP disabled that if ( r_ignore.GetInteger() ) { // we use the stencil buffer to guarantee that no pixels will be // double fogged, which happens in some areas that are thousands of // units from the origin backEnd.currentScissor = vLight->scissorRect; if ( r_useScissor.GetBool() ) { 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 ); } qglClear( GL_STENCIL_BUFFER_BIT ); qglEnable( GL_STENCIL_TEST ); // only pass on the cleared stencil values qglStencilFunc( GL_EQUAL, 128, 255 ); // when we pass the stencil test and depth test and are going to draw, // increment the stencil buffer so we don't ever draw on that pixel again qglStencilOp( GL_KEEP, GL_KEEP, GL_INCR ); } #endif if ( vLight->lightShader->IsFogLight() ) { RB_FogPass( vLight->globalInteractions, vLight->localInteractions ); } else if ( vLight->lightShader->IsBlendLight() ) { RB_BlendLight( vLight->globalInteractions, vLight->localInteractions ); } qglDisable( GL_STENCIL_TEST ); } qglEnable( GL_STENCIL_TEST ); }
/* ================== GL_StencilFunc ================== */ void GL_StencilFunc (uint func, int ref, uint mask){ if (glState.stencilFunc[0] == func && glState.stencilFunc[1] == func && glState.stencilFuncRef[0] == ref && glState.stencilFuncRef[1] == ref && glState.stencilFuncMask[0] == mask && glState.stencilFuncMask[1] == mask) return; glState.stencilFunc[0] = func; glState.stencilFunc[1] = func; glState.stencilFuncRef[0] = ref; glState.stencilFuncRef[1] = ref; glState.stencilFuncMask[0] = mask; glState.stencilFuncMask[1] = mask; qglStencilFunc(func, ref, mask); }
void GLRB_SetOverdrawMeasureEnabled( qboolean enabled ) { if ( !enabled ) { qglDisable( GL_STENCIL_TEST ); } else { qglEnable( GL_STENCIL_TEST ); qglStencilMask( ~0U ); qglClearStencil( 0U ); qglStencilFunc( GL_ALWAYS, 0U, ~0U ); qglStencilOp( GL_KEEP, GL_INCR, GL_INCR ); } }
void RB_MaskTessEnd( void ) { shaderCommands_t *input; input = &tess; //qglClear( GL_COLOR_BUFFER_BIT ); qglColorMask(GL_FALSE,GL_FALSE,GL_FALSE,GL_FALSE); qglDepthMask(GL_FALSE); qglEnable(GL_STENCIL_TEST); qglClearStencil(0); qglClear(GL_STENCIL_BUFFER_BIT); qglStencilFunc(GL_ALWAYS,1,1); qglStencilOp(GL_KEEP,GL_KEEP,GL_REPLACE); tess.currentStageIteratorFunc(); qglDepthMask(GL_TRUE); qglColorMask(GL_TRUE,GL_TRUE,GL_TRUE,GL_TRUE); qglStencilFunc(GL_EQUAL,1,1); qglStencilOp(GL_KEEP,GL_KEEP,GL_KEEP); }
/* ============= RB_STD_DrawView ============= */ void RB_STD_DrawView( void ) { drawSurf_t **drawSurfs; int numDrawSurfs; backEnd.depthFunc = GLS_DEPTHFUNC_EQUAL; drawSurfs = (drawSurf_t **)&backEnd.viewDef->drawSurfs[0]; numDrawSurfs = backEnd.viewDef->numDrawSurfs; // clear the z buffer, set the projection matrix, etc RB_BeginDrawingView(); // decide how much overbrighting we are going to do RB_DetermineLightScale(); // fill the depth buffer and clear color buffer to black except on // subviews RB_STD_FillDepthBuffer( drawSurfs, numDrawSurfs ); // main light renderer switch( tr.backEndRenderer ) { case BE_ARB2: RB_ARB2_DrawInteractions(); break; } // disable stencil shadow test qglStencilFunc( GL_ALWAYS, 128, 255 ); // uplight the entire screen to crutch up not having better blending range RB_STD_LightScale(); // now draw any non-light dependent shading passes int processed = RB_STD_DrawShaderPasses( drawSurfs, numDrawSurfs ); // fob and blend lights RB_STD_FogAllLights(); // now draw any post-processing effects using _currentRender if ( processed < numDrawSurfs ) { RB_STD_DrawShaderPasses( drawSurfs+processed, numDrawSurfs-processed ); } RB_RenderDebugTools( drawSurfs, numDrawSurfs ); }
/* * RB_SetGLDefaults */ static void RB_SetGLDefaults( void ) { int i; qglClearColor( 1, 0, 0.5, 0.5 ); if( glConfig.stencilEnabled ) { qglStencilMask( ( GLuint ) ~0 ); qglStencilFunc( GL_EQUAL, 128, 0xFF ); qglStencilOp( GL_KEEP, GL_KEEP, GL_INCR ); } // properly disable multitexturing at startup for( i = glConfig.maxTextureUnits-1; i >= 0; i-- ) { RB_SelectTextureUnit( i ); qglDisable( GL_TEXTURE_2D ); } qglEnable( GL_TEXTURE_2D ); qglDisable( GL_CULL_FACE ); qglFrontFace( GL_CCW ); qglEnable( GL_SCISSOR_TEST ); qglDisable( GL_BLEND ); qglDisable( GL_ALPHA_TEST ); qglDepthFunc( GL_LEQUAL ); qglDepthMask( GL_FALSE ); qglDisable( GL_POLYGON_OFFSET_FILL ); qglColorMask( GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE ); qglEnable( GL_DEPTH_TEST ); qglShadeModel( GL_SMOOTH ); if( qglPolygonMode ) { qglPolygonMode( GL_FRONT_AND_BACK, GL_FILL ); } qglFrontFace( GL_CCW ); rb.gl.state = 0; rb.gl.frontFace = qfalse; rb.gl.currentTMU = -1; rb.gl.faceCull = 0; rb.gl.polygonOffset[0] = rb.gl.polygonOffset[1] = 0; memset( rb.gl.currentTextures, 0, sizeof( rb.gl.currentTextures ) ); }
/* ===================== RB_STD_FillDepthBuffer If we are rendering a subview with a near clip plane, use a second texture to force the alpha test to fail when behind that clip plane ===================== */ void RB_STD_FillDepthBuffer(drawSurf_t **drawSurfs, int numDrawSurfs) { // if we are just doing 2D rendering, no need to fill the depth buffer if (!backEnd.viewDef->viewEntitys) { return; } RB_LogComment("---------- RB_STD_FillDepthBuffer ----------\n"); // enable the second texture for mirror plane clipping if needed if (backEnd.viewDef->numClipPlanes) { GL_SelectTexture(1); globalImages->alphaNotchImage->Bind(); qglDisableClientState(GL_TEXTURE_COORD_ARRAY); qglEnable(GL_TEXTURE_GEN_S); qglTexCoord2f(1, 0.5); } // the first texture will be used for alpha tested surfaces GL_SelectTexture(0); qglEnableClientState(GL_TEXTURE_COORD_ARRAY); // decal surfaces may enable polygon offset qglPolygonOffset(r_offsetFactor.GetFloat(), r_offsetUnits.GetFloat()); GL_State(GLS_DEPTHFUNC_LESS); // Enable stencil test if we are going to be using it for shadows. // If we didn't do this, it would be legal behavior to get z fighting // from the ambient pass and the light passes. qglEnable(GL_STENCIL_TEST); qglStencilFunc(GL_ALWAYS, 1, 255); RB_RenderDrawSurfListWithFunction(drawSurfs, numDrawSurfs, RB_T_FillDepthBuffer); if (backEnd.viewDef->numClipPlanes) { GL_SelectTexture(1); globalImages->BindNull(); qglDisable(GL_TEXTURE_GEN_S); GL_SelectTexture(0); } }
/* ============= RB_DrawSurfs ============= */ const void *RB_DrawSurfs( const void *data ) { const drawSurfsCommand_t *cmd; // finish any 2D drawing if needed if ( tess.numIndexes ) { RB_EndSurface(); } cmd = (const drawSurfsCommand_t *)data; backEnd.refdef = cmd->refdef; backEnd.viewParms = cmd->viewParms; if(r_subviewStencil->integer) { assert(backEnd.stencil_level == cmd->viewParms.subview_level); if(qtrue == backEnd.stencil_draw) { qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); backEnd.stencil_draw = qfalse; } if(backEnd.stencil_level) { // pass if: backEnd.stencil_level <= stencil qglStencilFunc(GL_LEQUAL, backEnd.stencil_level, ~0U); backEnd.stencil_level--; } } RB_RenderDrawSurfList( cmd->drawSurfs, cmd->numDrawSurfs ); if(r_subviewStencil->integer) { if(backEnd.stencil_test && 0 == backEnd.stencil_level) { qglDisable(GL_STENCIL_TEST); backEnd.stencil_test = qfalse; } } return (const void *)(cmd + 1); }
/* * RB_SetGLDefaults */ static void RB_SetGLDefaults( void ) { if( glConfig.stencilBits ) { qglStencilMask( ( GLuint ) ~0 ); qglStencilFunc( GL_EQUAL, 128, 0xFF ); qglStencilOp( GL_KEEP, GL_KEEP, GL_INCR ); } qglDisable( GL_CULL_FACE ); qglFrontFace( GL_CCW ); qglDisable( GL_BLEND ); qglDepthFunc( GL_LEQUAL ); qglDepthMask( GL_FALSE ); qglDisable( GL_POLYGON_OFFSET_FILL ); qglPolygonOffset( -1.0f, 0.0f ); // units will be handled by RB_DepthOffset qglColorMask( GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE ); qglEnable( GL_DEPTH_TEST ); #ifndef GL_ES_VERSION_2_0 qglPolygonMode( GL_FRONT_AND_BACK, GL_FILL ); #endif qglFrontFace( GL_CCW ); }
/* ================= RB_ShadowFinish Darken everything that is is a shadow volume. We have to delay this until everything has been shadowed, because otherwise shadows from different body parts would overlap and double darken. ================= */ void RB_ShadowFinish( void ) { vec3_t quad[4] = { {-100.0f, 100.0f, -10.0f}, { 100.0f, 100.0f, -10.0f}, { 100.0f, -100.0f, -10.0f}, {-100.0f, -100.0f, -10.0f} }; glIndex_t indicies[6] = { 0, 1, 2, 0, 3, 2 }; if ( r_shadows->integer != 2 ) { return; } if ( glConfig.stencilBits < 4 ) { return; } qglEnable( GL_STENCIL_TEST ); qglStencilFunc( GL_NOTEQUAL, 0, 255 ); qglDisable (GL_CLIP_PLANE0); qglDisable (GL_CULL_FACE); GL_Bind( tr.whiteImage ); qglLoadIdentity (); glColor4f( 0.6f, 0.6f, 0.6f, 1.0f ); GL_State( GLS_DEPTHMASK_TRUE | GLS_SRCBLEND_DST_COLOR | GLS_DSTBLEND_ZERO ); // glColor4f( 1, 0, 0, 1 ); // GL_State( GLS_DEPTHMASK_TRUE | GLS_SRCBLEND_ONE | GLS_DSTBLEND_ZERO ); qglVertexPointer(3, GL_FLOAT, 0, quad); qglDrawElements(GL_TRIANGLE_STRIP, 6, GL_INDEX_TYPE, indicies); glColor4f(1,1,1,1); qglDisable( GL_STENCIL_TEST ); }
/* ==================== RE_BeginFrame If running in stereo, RE_BeginFrame will be called twice for each RE_EndFrame ==================== */ void RE_BeginFrame( stereoFrame_t stereoFrame ) { drawBufferCommand_t *cmd = NULL; colorMaskCommand_t *colcmd = NULL; if ( !tr.registered ) { return; } glState.finishCalled = qfalse; tr.frameCount++; tr.frameSceneNum = 0; // // do overdraw measurement // if ( r_measureOverdraw->integer ) { if ( glConfig.stencilBits < 4 ) { ri.Printf( PRINT_ALL, "Warning: not enough stencil bits to measure overdraw: %d\n", glConfig.stencilBits ); ri.Cvar_Set( "r_measureOverdraw", "0" ); r_measureOverdraw->modified = qfalse; } else if ( r_shadows->integer == 2 ) { ri.Printf( PRINT_ALL, "Warning: stencil shadows and overdraw measurement are mutually exclusive\n" ); ri.Cvar_Set( "r_measureOverdraw", "0" ); r_measureOverdraw->modified = qfalse; } else { R_IssuePendingRenderCommands(); qglEnable( GL_STENCIL_TEST ); qglStencilMask( ~0U ); qglClearStencil( 0U ); qglStencilFunc( GL_ALWAYS, 0U, ~0U ); qglStencilOp( GL_KEEP, GL_INCR, GL_INCR ); } r_measureOverdraw->modified = qfalse; } else { // this is only reached if it was on and is now off if ( r_measureOverdraw->modified ) { R_IssuePendingRenderCommands(); qglDisable( GL_STENCIL_TEST ); } r_measureOverdraw->modified = qfalse; } // // texturemode stuff // if ( r_textureMode->modified ) { R_IssuePendingRenderCommands(); GL_TextureMode( r_textureMode->string ); r_textureMode->modified = qfalse; } // // gamma stuff // if ( r_gamma->modified ) { r_gamma->modified = qfalse; R_IssuePendingRenderCommands(); R_SetColorMappings(); } // check for errors if ( !r_ignoreGLErrors->integer ) { int err; R_IssuePendingRenderCommands(); if ((err = qglGetError()) != GL_NO_ERROR) ri.Error(ERR_FATAL, "RE_BeginFrame() - glGetError() failed (0x%x)!", err); } if (glConfig.stereoEnabled) { if( !(cmd = R_GetCommandBuffer(sizeof(*cmd))) ) return; cmd->commandId = RC_DRAW_BUFFER; if ( stereoFrame == STEREO_LEFT ) { cmd->buffer = (int)GL_BACK_LEFT; } else if ( stereoFrame == STEREO_RIGHT ) { cmd->buffer = (int)GL_BACK_RIGHT; } else { ri.Error( ERR_FATAL, "RE_BeginFrame: Stereo is enabled, but stereoFrame was %i", stereoFrame ); } } else { if(r_anaglyphMode->integer) { if(r_anaglyphMode->modified) { // clear both, front and backbuffer. qglColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); backEnd.colorMask[0] = GL_FALSE; backEnd.colorMask[1] = GL_FALSE; backEnd.colorMask[2] = GL_FALSE; backEnd.colorMask[3] = GL_FALSE; qglClearColor(0.0f, 0.0f, 0.0f, 1.0f); if (glRefConfig.framebufferObject) { // clear all framebuffers if (tr.msaaResolveFbo) { FBO_Bind(tr.msaaResolveFbo); qglClear(GL_COLOR_BUFFER_BIT); } if (tr.renderFbo) { FBO_Bind(tr.renderFbo); qglClear(GL_COLOR_BUFFER_BIT); } FBO_Bind(NULL); } qglDrawBuffer(GL_FRONT); qglClear(GL_COLOR_BUFFER_BIT); qglDrawBuffer(GL_BACK); qglClear(GL_COLOR_BUFFER_BIT); r_anaglyphMode->modified = qfalse; } if(stereoFrame == STEREO_LEFT) { if( !(cmd = R_GetCommandBuffer(sizeof(*cmd))) ) return; if( !(colcmd = R_GetCommandBuffer(sizeof(*colcmd))) ) return; } else if(stereoFrame == STEREO_RIGHT) { clearDepthCommand_t *cldcmd; if( !(cldcmd = R_GetCommandBuffer(sizeof(*cldcmd))) ) return; cldcmd->commandId = RC_CLEARDEPTH; if( !(colcmd = R_GetCommandBuffer(sizeof(*colcmd))) ) return; } else ri.Error( ERR_FATAL, "RE_BeginFrame: Stereo is enabled, but stereoFrame was %i", stereoFrame ); R_SetColorMode(colcmd->rgba, stereoFrame, r_anaglyphMode->integer); colcmd->commandId = RC_COLORMASK; } else { if(stereoFrame != STEREO_CENTER) ri.Error( ERR_FATAL, "RE_BeginFrame: Stereo is disabled, but stereoFrame was %i", stereoFrame ); if( !(cmd = R_GetCommandBuffer(sizeof(*cmd))) ) return; } if(cmd) { cmd->commandId = RC_DRAW_BUFFER; if(r_anaglyphMode->modified) { qglColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); backEnd.colorMask[0] = 0; backEnd.colorMask[1] = 0; backEnd.colorMask[2] = 0; backEnd.colorMask[3] = 0; r_anaglyphMode->modified = qfalse; } if (!Q_stricmp(r_drawBuffer->string, "GL_FRONT")) cmd->buffer = (int)GL_FRONT; else cmd->buffer = (int)GL_BACK; } } tr.refdef.stereoFrame = stereoFrame; }
/* ================= RB_ProjectionShadowDeform ================= */ void RB_ProjectionShadowDeform( void ) { #ifdef _XBOX float shadowMat[4][4]; vec3_t light, ground; float d, dot; ground[0] = backEnd.ori.axis[0][2]; ground[1] = backEnd.ori.axis[1][2]; ground[2] = backEnd.ori.axis[2][2]; d = backEnd.ori.origin[2] - backEnd.currentEntity->e.shadowPlane; light[0] = backEnd.currentEntity->lightDir[0]; light[1] = backEnd.currentEntity->lightDir[1]; light[2] = backEnd.currentEntity->lightDir[2]; dot = ground[0] * light[0] + ground[1] * light[1] + ground[2] * light[2]; // don't let the shadows get too long or go negative if ( dot < 0.5 ) { VectorMA( light, (0.5 - dot), ground, light ); dot = DotProduct( light, ground ); } shadowMat[0][0] = dot - light[0] * ground[0]; shadowMat[1][0] = 0.f - light[0] * ground[1]; shadowMat[2][0] = 0.f - light[0] * ground[2]; shadowMat[3][0] = 0.f - light[0] * d; shadowMat[0][1] = 0.f - light[1] * ground[0]; shadowMat[1][1] = dot - light[1] * ground[1]; shadowMat[2][1] = 0.f - light[1] * ground[2]; shadowMat[3][1] = 0.f - light[1] * d; shadowMat[0][2] = 0.f - light[2] * ground[0]; shadowMat[1][2] = 0.f - light[2] * ground[1]; shadowMat[2][2] = dot - light[2] * ground[2]; shadowMat[3][2] = 0.f - light[2] * d; shadowMat[0][3] = 0.f; shadowMat[1][3] = 0.f; shadowMat[2][3] = 0.f; shadowMat[3][3] = dot; qglMatrixMode(GL_MODELVIEW); qglMultMatrixf(&shadowMat[0][0]); // Turn on stenciling // This is done to prevent overlapping shadow artifacts qglEnable( GL_STENCIL_TEST ); qglStencilFunc( GL_NOTEQUAL, 0x1, 0xffffffff ); qglStencilMask( 0xffffffff ); qglStencilOp( GL_KEEP, GL_KEEP, GL_INCR ); #else float *xyz; int i; float h; vec3_t ground; vec3_t light; float groundDist; float d; vec3_t lightDir; xyz = ( float * ) tess.xyz; ground[0] = backEnd.ori.axis[0][2]; ground[1] = backEnd.ori.axis[1][2]; ground[2] = backEnd.ori.axis[2][2]; groundDist = backEnd.ori.origin[2] - backEnd.currentEntity->e.shadowPlane; VectorCopy( backEnd.currentEntity->lightDir, lightDir ); d = DotProduct( lightDir, ground ); // don't let the shadows get too long or go negative if ( d < 0.5 ) { VectorMA( lightDir, (0.5 - d), ground, lightDir ); d = DotProduct( lightDir, ground ); } d = 1.0 / d; light[0] = lightDir[0] * d; light[1] = lightDir[1] * d; light[2] = lightDir[2] * d; for ( i = 0; i < tess.numVertexes; i++, xyz += 4 ) { h = DotProduct( xyz, ground ) + groundDist; xyz[0] -= light[0] * h; xyz[1] -= light[1] * h; xyz[2] -= light[2] * h; } #endif // _XBOX }
void RB_DistortionFill(void) { float alpha = tr_distortionAlpha; float spost = 0.0f; float spost2 = 0.0f; if ( glConfig.stencilBits < 4 ) { return; } //ok, cap the stupid thing now I guess if (!tr_distortionPrePost) { RB_CaptureScreenImage(); } qglEnable(GL_STENCIL_TEST); qglStencilFunc(GL_NOTEQUAL, 0, 0xFFFFFFFF); qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); qglDisable (GL_CLIP_PLANE0); GL_Cull( CT_TWO_SIDED ); //reset the view matrices and go into ortho mode qglMatrixMode(GL_PROJECTION); qglPushMatrix(); qglLoadIdentity(); qglOrtho(0, glConfig.vidWidth, glConfig.vidHeight, 32, -1, 1); qglMatrixMode(GL_MODELVIEW); qglPushMatrix(); qglLoadIdentity(); if (tr_distortionStretch) { //override spost = tr_distortionStretch; spost2 = tr_distortionStretch; } else { //do slow stretchy effect spost = sin(tr.refdef.time*0.0005f); if (spost < 0.0f) { spost = -spost; } spost *= 0.2f; spost2 = sin(tr.refdef.time*0.0005f); if (spost2 < 0.0f) { spost2 = -spost2; } spost2 *= 0.08f; } if (alpha != 1.0f) { //blend GL_State(GLS_SRCBLEND_SRC_ALPHA|GLS_DSTBLEND_SRC_ALPHA); } else { //be sure to reset the draw state GL_State(0); } #ifdef _XBOX qglBeginEXT(GL_QUADS, 4, 0, 0, 4, 0); #else qglBegin(GL_QUADS); #endif // _XBOX qglColor4f(1.0f, 1.0f, 1.0f, alpha); qglTexCoord2f(0+spost2, 1-spost); qglVertex2f(0, 0); qglTexCoord2f(0+spost2, 0+spost); qglVertex2f(0, glConfig.vidHeight); qglTexCoord2f(1-spost2, 0+spost); qglVertex2f(glConfig.vidWidth, glConfig.vidHeight); qglTexCoord2f(1-spost2, 1-spost); qglVertex2f(glConfig.vidWidth, 0); qglEnd(); if (tr_distortionAlpha == 1.0f && tr_distortionStretch == 0.0f) { //no overrides if (tr_distortionNegate) { //probably the crazy alternate saber trail alpha = 0.8f; GL_State(GLS_SRCBLEND_ZERO|GLS_DSTBLEND_ONE_MINUS_SRC_COLOR); } else { alpha = 0.5f; GL_State(GLS_SRCBLEND_SRC_ALPHA|GLS_DSTBLEND_SRC_ALPHA); } spost = sin(tr.refdef.time*0.0008f); if (spost < 0.0f) { spost = -spost; } spost *= 0.08f; spost2 = sin(tr.refdef.time*0.0008f); if (spost2 < 0.0f) { spost2 = -spost2; } spost2 *= 0.2f; #ifdef _XBOX qglBeginEXT(GL_QUADS, 4, 0, 0, 4, 0); #else qglBegin(GL_QUADS); #endif // _XBOX qglColor4f(1.0f, 1.0f, 1.0f, alpha); qglTexCoord2f(0+spost2, 1-spost); qglVertex2f(0, 0); qglTexCoord2f(0+spost2, 0+spost); qglVertex2f(0, glConfig.vidHeight); qglTexCoord2f(1-spost2, 0+spost); qglVertex2f(glConfig.vidWidth, glConfig.vidHeight); qglTexCoord2f(1-spost2, 1-spost); qglVertex2f(glConfig.vidWidth, 0); qglEnd(); } //pop the view matrices back qglMatrixMode(GL_PROJECTION); qglPopMatrix(); qglMatrixMode(GL_MODELVIEW); qglPopMatrix(); qglDisable( GL_STENCIL_TEST ); }
void RB_DoShadowTessEnd( vec3_t lightPos ) { #ifndef _XBOX int i; int numTris; vec3_t lightDir; // we can only do this if we have enough space in the vertex buffers if ( tess.numVertexes >= SHADER_MAX_VERTEXES / 2 ) { return; } if ( glConfig.stencilBits < 4 ) { return; } #if 1 //controlled method - try to keep shadows in range so they don't show through so much -rww vec3_t worldxyz; vec3_t entLight; float groundDist; VectorCopy( backEnd.currentEntity->lightDir, entLight ); entLight[2] = 0.0f; VectorNormalize(entLight); //Oh well, just cast them straight down no matter what onto the ground plane. //This presets no chance of screwups and still looks better than a stupid //shader blob. VectorSet(lightDir, entLight[0]*0.3f, entLight[1]*0.3f, 1.0f); // project vertexes away from light direction for ( i = 0 ; i < tess.numVertexes ; i++ ) { //add or.origin to vert xyz to end up with world oriented coord, then figure //out the ground pos for the vert to project the shadow volume to VectorAdd(tess.xyz[i], backEnd.ori.origin, worldxyz); groundDist = worldxyz[2] - backEnd.currentEntity->e.shadowPlane; groundDist += 16.0f; //fudge factor VectorMA( tess.xyz[i], -groundDist, lightDir, tess.xyz[i+tess.numVertexes] ); } #else if (lightPos) { for ( i = 0 ; i < tess.numVertexes ; i++ ) { tess.xyz[i+tess.numVertexes][0] = tess.xyz[i][0]+(( tess.xyz[i][0]-lightPos[0] )*128.0f); tess.xyz[i+tess.numVertexes][1] = tess.xyz[i][1]+(( tess.xyz[i][1]-lightPos[1] )*128.0f); tess.xyz[i+tess.numVertexes][2] = tess.xyz[i][2]+(( tess.xyz[i][2]-lightPos[2] )*128.0f); } } else { VectorCopy( backEnd.currentEntity->lightDir, lightDir ); // project vertexes away from light direction for ( i = 0 ; i < tess.numVertexes ; i++ ) { VectorMA( tess.xyz[i], -512, lightDir, tess.xyz[i+tess.numVertexes] ); } } #endif // decide which triangles face the light memset( numEdgeDefs, 0, 4 * tess.numVertexes ); numTris = tess.numIndexes / 3; for ( i = 0 ; i < numTris ; i++ ) { int i1, i2, i3; vec3_t d1, d2, normal; float *v1, *v2, *v3; float d; i1 = tess.indexes[ i*3 + 0 ]; i2 = tess.indexes[ i*3 + 1 ]; i3 = tess.indexes[ i*3 + 2 ]; v1 = tess.xyz[ i1 ]; v2 = tess.xyz[ i2 ]; v3 = tess.xyz[ i3 ]; if (!lightPos) { VectorSubtract( v2, v1, d1 ); VectorSubtract( v3, v1, d2 ); CrossProduct( d1, d2, normal ); d = DotProduct( normal, lightDir ); } else { float planeEq[4]; planeEq[0] = v1[1]*(v2[2]-v3[2]) + v2[1]*(v3[2]-v1[2]) + v3[1]*(v1[2]-v2[2]); planeEq[1] = v1[2]*(v2[0]-v3[0]) + v2[2]*(v3[0]-v1[0]) + v3[2]*(v1[0]-v2[0]); planeEq[2] = v1[0]*(v2[1]-v3[1]) + v2[0]*(v3[1]-v1[1]) + v3[0]*(v1[1]-v2[1]); planeEq[3] = -( v1[0]*( v2[1]*v3[2] - v3[1]*v2[2] ) + v2[0]*(v3[1]*v1[2] - v1[1]*v3[2]) + v3[0]*(v1[1]*v2[2] - v2[1]*v1[2]) ); d = planeEq[0]*lightPos[0]+ planeEq[1]*lightPos[1]+ planeEq[2]*lightPos[2]+ planeEq[3]; } if ( d > 0 ) { facing[ i ] = 1; } else { facing[ i ] = 0; } // create the edges R_AddEdgeDef( i1, i2, facing[ i ] ); R_AddEdgeDef( i2, i3, facing[ i ] ); R_AddEdgeDef( i3, i1, facing[ i ] ); } GL_Bind( tr.whiteImage ); //qglEnable( GL_CULL_FACE ); GL_State( GLS_SRCBLEND_ONE | GLS_DSTBLEND_ZERO ); #ifndef _DEBUG_STENCIL_SHADOWS qglColor3f( 0.2f, 0.2f, 0.2f ); // don't write to the color buffer qglColorMask( GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE ); qglEnable( GL_STENCIL_TEST ); qglStencilFunc( GL_ALWAYS, 1, 255 ); #else qglColor3f( 1.0f, 0.0f, 0.0f ); qglPolygonMode(GL_FRONT_AND_BACK, GL_LINE); //qglDisable(GL_DEPTH_TEST); #endif #ifdef _STENCIL_REVERSE qglDepthFunc(GL_LESS); //now using the Carmack Reverse<tm> -rww if ( backEnd.viewParms.isMirror ) { //qglCullFace( GL_BACK ); GL_Cull(CT_BACK_SIDED); qglStencilOp( GL_KEEP, GL_INCR, GL_KEEP ); R_RenderShadowEdges(); //qglCullFace( GL_FRONT ); GL_Cull(CT_FRONT_SIDED); qglStencilOp( GL_KEEP, GL_DECR, GL_KEEP ); R_RenderShadowEdges(); } else { //qglCullFace( GL_FRONT ); GL_Cull(CT_FRONT_SIDED); qglStencilOp( GL_KEEP, GL_INCR, GL_KEEP ); R_RenderShadowEdges(); //qglCullFace( GL_BACK ); GL_Cull(CT_BACK_SIDED); qglStencilOp( GL_KEEP, GL_DECR, GL_KEEP ); R_RenderShadowEdges(); } qglDepthFunc(GL_LEQUAL); #else // mirrors have the culling order reversed if ( backEnd.viewParms.isMirror ) { qglCullFace( GL_FRONT ); qglStencilOp( GL_KEEP, GL_KEEP, GL_INCR ); R_RenderShadowEdges(); qglCullFace( GL_BACK ); qglStencilOp( GL_KEEP, GL_KEEP, GL_DECR ); R_RenderShadowEdges(); } else { qglCullFace( GL_BACK ); qglStencilOp( GL_KEEP, GL_KEEP, GL_INCR ); R_RenderShadowEdges(); qglCullFace( GL_FRONT ); qglStencilOp( GL_KEEP, GL_KEEP, GL_DECR ); R_RenderShadowEdges(); } #endif // reenable writing to the color buffer qglColorMask( GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE ); #ifdef _DEBUG_STENCIL_SHADOWS qglPolygonMode(GL_FRONT_AND_BACK, GL_FILL); #endif #endif // _XBOX }
void RB_DistortionFill(void) { float alpha = tr_distortionAlpha; float spost = 0.0f; float spost2 = 0.0f; if ( glConfig.stencilBits < 4 ) { return; } //ok, cap the stupid thing now I guess if (!tr_distortionPrePost) { RB_CaptureScreenImage(); } qglEnable(GL_STENCIL_TEST); qglStencilFunc(GL_NOTEQUAL, 0, 0xFFFFFFFF); qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); qglDisable (GL_CLIP_PLANE0); GL_Cull( CT_TWO_SIDED ); //reset the view matrices and go into ortho mode qglMatrixMode(GL_PROJECTION); qglPushMatrix(); qglLoadIdentity(); qglOrtho(0, glConfig.vidWidth, glConfig.vidHeight, 32, -1, 1); qglMatrixMode(GL_MODELVIEW); qglPushMatrix(); qglLoadIdentity(); if (tr_distortionStretch) { //override spost = tr_distortionStretch; spost2 = tr_distortionStretch; } else { //do slow stretchy effect spost = sin(tr.refdef.time * 0.0005 + tr.refdef.timeFraction * 0.0005); if (spost < 0.0f) { spost = -spost; } spost *= 0.2f; spost2 = sin(tr.refdef.time * 0.0005 + tr.refdef.timeFraction * 0.0005); if (spost2 < 0.0f) { spost2 = -spost2; } spost2 *= 0.08f; } if (alpha != 1.0f) { //blend GL_State(GLS_SRCBLEND_SRC_ALPHA|GLS_DSTBLEND_SRC_ALPHA); } else { //be sure to reset the draw state GL_State(0); } #ifdef HAVE_GLES qglColor4f(1.0f, 1.0f, 1.0f, alpha); GLboolean text = qglIsEnabled(GL_TEXTURE_COORD_ARRAY); GLboolean glcol = qglIsEnabled(GL_COLOR_ARRAY); if (!text) qglEnableClientState(GL_TEXTURE_COORD_ARRAY); if (glcol) qglDisableClientState(GL_COLOR_ARRAY); GLfloat tex[] = { 0 + spost2, 1 - spost, 0 + spost2, 0 + spost, 1 - spost2, 0 + spost, 1 - spost2, 1 - spost }; GLfloat vtx[] = { 0, 0, 0, glConfig.vidHeight, glConfig.vidWidth, glConfig.vidHeight, glConfig.vidWidth, 0 }; qglTexCoordPointer(2, GL_FLOAT, 0, tex); qglVertexPointer(2, GL_FLOAT, 0, vtx); qglDrawArrays(GL_TRIANGLE_FAN, 0, 4); /* if (glcol) qglEnableClientState( GL_COLOR_ARRAY ); if (!text) qglDisableClientState( GL_TEXTURE_COORD_ARRAY );*/ #else qglBegin(GL_QUADS); qglColor4f(1.0f, 1.0f, 1.0f, alpha); qglTexCoord2f(0+spost2, 1-spost); qglVertex2f(0, 0); qglTexCoord2f(0+spost2, 0+spost); qglVertex2f(0, glConfig.vidHeight); qglTexCoord2f(1-spost2, 0+spost); qglVertex2f(glConfig.vidWidth, glConfig.vidHeight); qglTexCoord2f(1-spost2, 1-spost); qglVertex2f(glConfig.vidWidth, 0); qglEnd(); #endif if (tr_distortionAlpha == 1.0f && tr_distortionStretch == 0.0f) { //no overrides if (tr_distortionNegate) { //probably the crazy alternate saber trail alpha = 0.8f; GL_State(GLS_SRCBLEND_ZERO|GLS_DSTBLEND_ONE_MINUS_SRC_COLOR); } else { alpha = 0.5f; GL_State(GLS_SRCBLEND_SRC_ALPHA|GLS_DSTBLEND_SRC_ALPHA); } spost = sin(tr.refdef.time * 0.0008 + tr.refdef.timeFraction * 0.0008); if (spost < 0.0f) { spost = -spost; } spost *= 0.08f; spost2 = sin(tr.refdef.time * 0.0008 + tr.refdef.timeFraction * 0.0008); if (spost2 < 0.0f) { spost2 = -spost2; } spost2 *= 0.2f; #ifdef HAVE_GLES qglColor4f(1.0f, 1.0f, 1.0f, alpha); /* GLboolean text = qglIsEnabled(GL_TEXTURE_COORD_ARRAY); GLboolean glcol = qglIsEnabled(GL_COLOR_ARRAY); if (!text) qglEnableClientState( GL_TEXTURE_COORD_ARRAY ); if (glcol) qglDisableClientState( GL_COLOR_ARRAY );*/ GLfloat tex[] = { 0 + spost2, 1 - spost, 0 + spost2, 0 + spost, 1 - spost2, 0 + spost, 1 - spost2, 1 - spost }; GLfloat vtx[] = { 0, 0, 0, glConfig.vidHeight, glConfig.vidWidth, glConfig.vidHeight, glConfig.vidWidth, 0 }; qglTexCoordPointer(2, GL_FLOAT, 0, tex); qglVertexPointer(2, GL_FLOAT, 0, vtx); qglDrawArrays(GL_TRIANGLE_FAN, 0, 4); #else qglBegin(GL_QUADS); qglColor4f(1.0f, 1.0f, 1.0f, alpha); qglTexCoord2f(0+spost2, 1-spost); qglVertex2f(0, 0); qglTexCoord2f(0+spost2, 0+spost); qglVertex2f(0, glConfig.vidHeight); qglTexCoord2f(1-spost2, 0+spost); qglVertex2f(glConfig.vidWidth, glConfig.vidHeight); qglTexCoord2f(1-spost2, 1-spost); qglVertex2f(glConfig.vidWidth, 0); qglEnd(); #endif } #ifdef HAVE_GLES if (glcol) qglEnableClientState(GL_COLOR_ARRAY); if (!text) qglDisableClientState(GL_TEXTURE_COORD_ARRAY); #endif //pop the view matrices back qglMatrixMode(GL_PROJECTION); qglPopMatrix(); qglMatrixMode(GL_MODELVIEW); qglPopMatrix(); qglDisable( GL_STENCIL_TEST ); }
/* ==================== RE_BeginFrame If running in stereo, RE_BeginFrame will be called twice for each RE_EndFrame ==================== */ void RE_BeginFrame( stereoFrame_t stereoFrame ) { drawBufferCommand_t *cmd = NULL; colorMaskCommand_t *colcmd = NULL; if ( !tr.registered ) { return; } glState.finishCalled = qfalse; tr.frameCount++; tr.frameSceneNum = 0; // // do overdraw measurement // if ( r_measureOverdraw->integer ) { if ( glConfig.stencilBits < 4 ) { ri.Printf( PRINT_ALL, "Warning: not enough stencil bits to measure overdraw: %d\n", glConfig.stencilBits ); ri.Cvar_Set( "r_measureOverdraw", "0" ); r_measureOverdraw->modified = qfalse; } else if ( r_shadows->integer == 2 ) { ri.Printf( PRINT_ALL, "Warning: stencil shadows and overdraw measurement are mutually exclusive\n" ); ri.Cvar_Set( "r_measureOverdraw", "0" ); r_measureOverdraw->modified = qfalse; } else { R_IssuePendingRenderCommands(); qglEnable( GL_STENCIL_TEST ); qglStencilMask( ~0U ); qglClearStencil( 0U ); qglStencilFunc( GL_ALWAYS, 0U, ~0U ); qglStencilOp( GL_KEEP, GL_INCR, GL_INCR ); } r_measureOverdraw->modified = qfalse; } else { // this is only reached if it was on and is now off if ( r_measureOverdraw->modified ) { R_IssuePendingRenderCommands(); qglDisable( GL_STENCIL_TEST ); } r_measureOverdraw->modified = qfalse; } // // texturemode stuff // if ( r_textureMode->modified ) { R_IssuePendingRenderCommands(); GL_TextureMode( r_textureMode->string ); r_textureMode->modified = qfalse; } // // ATI stuff // // TRUFORM if ( qglPNTrianglesiATI ) { // tess if ( r_ati_truform_tess->modified ) { r_ati_truform_tess->modified = qfalse; // cap if necessary if ( r_ati_truform_tess->value > glConfig.ATIMaxTruformTess ) { ri.Cvar_Set( "r_ati_truform_tess", va( "%d",glConfig.ATIMaxTruformTess ) ); } qglPNTrianglesiATI( GL_PN_TRIANGLES_TESSELATION_LEVEL_ATI, r_ati_truform_tess->value ); } // point mode if ( r_ati_truform_pointmode->modified ) { r_ati_truform_pointmode->modified = qfalse; // GR - shorten the mode name if ( !Q_stricmp( r_ati_truform_pointmode->string, "LINEAR" ) ) { glConfig.ATIPointMode = (int)GL_PN_TRIANGLES_POINT_MODE_LINEAR_ATI; // GR - fix point mode change } else if ( !Q_stricmp( r_ati_truform_pointmode->string, "CUBIC" ) ) { glConfig.ATIPointMode = (int)GL_PN_TRIANGLES_POINT_MODE_CUBIC_ATI; } else { // bogus value, set to valid glConfig.ATIPointMode = (int)GL_PN_TRIANGLES_POINT_MODE_CUBIC_ATI; ri.Cvar_Set( "r_ati_truform_pointmode", "LINEAR" ); } qglPNTrianglesiATI( GL_PN_TRIANGLES_POINT_MODE_ATI, glConfig.ATIPointMode ); } // normal mode if ( r_ati_truform_normalmode->modified ) { r_ati_truform_normalmode->modified = qfalse; // GR - shorten the mode name if ( !Q_stricmp( r_ati_truform_normalmode->string, "LINEAR" ) ) { glConfig.ATINormalMode = (int)GL_PN_TRIANGLES_NORMAL_MODE_LINEAR_ATI; // GR - fix normal mode change } else if ( !Q_stricmp( r_ati_truform_normalmode->string, "QUADRATIC" ) ) { glConfig.ATINormalMode = (int)GL_PN_TRIANGLES_NORMAL_MODE_QUADRATIC_ATI; } else { // bogus value, set to valid glConfig.ATINormalMode = (int)GL_PN_TRIANGLES_NORMAL_MODE_LINEAR_ATI; ri.Cvar_Set( "r_ati_truform_normalmode", "LINEAR" ); } qglPNTrianglesiATI( GL_PN_TRIANGLES_NORMAL_MODE_ATI, glConfig.ATINormalMode ); } } // // NVidia stuff // // fog control if ( glConfig.NVFogAvailable && r_nv_fogdist_mode->modified ) { r_nv_fogdist_mode->modified = qfalse; if ( !Q_stricmp( r_nv_fogdist_mode->string, "GL_EYE_PLANE_ABSOLUTE_NV" ) ) { glConfig.NVFogMode = (int)GL_EYE_PLANE_ABSOLUTE_NV; } else if ( !Q_stricmp( r_nv_fogdist_mode->string, "GL_EYE_PLANE" ) ) { glConfig.NVFogMode = (int)GL_EYE_PLANE; } else if ( !Q_stricmp( r_nv_fogdist_mode->string, "GL_EYE_RADIAL_NV" ) ) { glConfig.NVFogMode = (int)GL_EYE_RADIAL_NV; } else { // in case this was really 'else', store a valid value for next time glConfig.NVFogMode = (int)GL_EYE_RADIAL_NV; ri.Cvar_Set( "r_nv_fogdist_mode", "GL_EYE_RADIAL_NV" ); } } // // gamma stuff // if ( r_gamma->modified ) { r_gamma->modified = qfalse; R_IssuePendingRenderCommands(); R_SetColorMappings(); } // check for errors if ( !r_ignoreGLErrors->integer ) { int err; R_IssuePendingRenderCommands(); if ( ( err = qglGetError() ) != GL_NO_ERROR ) { ri.Error( ERR_FATAL, "RE_BeginFrame() - glGetError() failed (0x%x)!", err ); } } if (glConfig.stereoEnabled) { if( !(cmd = R_GetCommandBuffer(sizeof(*cmd))) ) return; cmd->commandId = RC_DRAW_BUFFER; if ( stereoFrame == STEREO_LEFT ) { cmd->buffer = (int)GL_BACK_LEFT; } else if ( stereoFrame == STEREO_RIGHT ) { cmd->buffer = (int)GL_BACK_RIGHT; } else { ri.Error( ERR_FATAL, "RE_BeginFrame: Stereo is enabled, but stereoFrame was %i", stereoFrame ); } } else { if(r_anaglyphMode->integer) { if(r_anaglyphMode->modified) { // clear both, front and backbuffer. qglColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); backEnd.colorMask[0] = GL_FALSE; backEnd.colorMask[1] = GL_FALSE; backEnd.colorMask[2] = GL_FALSE; backEnd.colorMask[3] = GL_FALSE; if (glRefConfig.framebufferObject) { // clear all framebuffers if (tr.msaaResolveFbo) { FBO_Bind(tr.msaaResolveFbo); qglClear(GL_COLOR_BUFFER_BIT); } if (tr.renderFbo) { FBO_Bind(tr.renderFbo); qglClear(GL_COLOR_BUFFER_BIT); } FBO_Bind(NULL); } qglDrawBuffer(GL_FRONT); qglClear(GL_COLOR_BUFFER_BIT); qglDrawBuffer(GL_BACK); qglClear(GL_COLOR_BUFFER_BIT); r_anaglyphMode->modified = qfalse; } if(stereoFrame == STEREO_LEFT) { if( !(cmd = R_GetCommandBuffer(sizeof(*cmd))) ) return; if( !(colcmd = R_GetCommandBuffer(sizeof(*colcmd))) ) return; } else if(stereoFrame == STEREO_RIGHT) { clearDepthCommand_t *cldcmd; if( !(cldcmd = R_GetCommandBuffer(sizeof(*cldcmd))) ) return; cldcmd->commandId = RC_CLEARDEPTH; if( !(colcmd = R_GetCommandBuffer(sizeof(*colcmd))) ) return; } else ri.Error( ERR_FATAL, "RE_BeginFrame: Stereo is enabled, but stereoFrame was %i", stereoFrame ); R_SetColorMode(colcmd->rgba, stereoFrame, r_anaglyphMode->integer); colcmd->commandId = RC_COLORMASK; } else { if(stereoFrame != STEREO_CENTER) ri.Error( ERR_FATAL, "RE_BeginFrame: Stereo is disabled, but stereoFrame was %i", stereoFrame ); if( !(cmd = R_GetCommandBuffer(sizeof(*cmd))) ) return; } if(cmd) { cmd->commandId = RC_DRAW_BUFFER; if(r_anaglyphMode->modified) { qglColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); backEnd.colorMask[0] = 0; backEnd.colorMask[1] = 0; backEnd.colorMask[2] = 0; backEnd.colorMask[3] = 0; r_anaglyphMode->modified = qfalse; } if (!Q_stricmp(r_drawBuffer->string, "GL_FRONT")) cmd->buffer = (int)GL_FRONT; else cmd->buffer = (int)GL_BACK; } } tr.refdef.stereoFrame = stereoFrame; }
/* ==================== RE_BeginFrame If running in stereo, RE_BeginFrame will be called twice for each RE_EndFrame ==================== */ void RE_BeginFrame( stereoFrame_t stereoFrame ) { drawBufferCommand_t *cmd; if ( !tr.registered ) { return; } glState.finishCalled = qfalse; tr.frameCount++; tr.frameSceneNum = 0; // // do overdraw measurement // if ( r_measureOverdraw->integer ) { if ( glConfig.stencilBits < 4 ) { ri->Printf( PRINT_ALL, "Warning: not enough stencil bits to measure overdraw: %d\n", glConfig.stencilBits ); ri->Cvar_Set( "r_measureOverdraw", "0" ); r_measureOverdraw->modified = qfalse; } else if ( r_shadows->integer == 2 ) { ri->Printf( PRINT_ALL, "Warning: stencil shadows and overdraw measurement are mutually exclusive\n" ); ri->Cvar_Set( "r_measureOverdraw", "0" ); r_measureOverdraw->modified = qfalse; } else { R_IssuePendingRenderCommands(); qglEnable( GL_STENCIL_TEST ); qglStencilMask( ~0U ); qglClearStencil( 0U ); qglStencilFunc( GL_ALWAYS, 0U, ~0U ); qglStencilOp( GL_KEEP, GL_INCR, GL_INCR ); } r_measureOverdraw->modified = qfalse; } else { // this is only reached if it was on and is now off if ( r_measureOverdraw->modified ) { R_IssuePendingRenderCommands(); qglDisable( GL_STENCIL_TEST ); } r_measureOverdraw->modified = qfalse; } // // texturemode stuff // if ( r_textureMode->modified || r_ext_texture_filter_anisotropic->modified) { R_IssuePendingRenderCommands(); GL_TextureMode( r_textureMode->string ); r_textureMode->modified = qfalse; r_ext_texture_filter_anisotropic->modified = qfalse; } // // gamma stuff // if ( r_gamma->modified ) { r_gamma->modified = qfalse; R_IssuePendingRenderCommands(); R_SetColorMappings(); } // check for errors if ( !r_ignoreGLErrors->integer ) { int err; R_IssuePendingRenderCommands(); if ( ( err = qglGetError() ) != GL_NO_ERROR ) { Com_Error( ERR_FATAL, "RE_BeginFrame() - glGetError() failed (0x%x)!\n", err ); } } // // draw buffer stuff // cmd = (drawBufferCommand_t *) R_GetCommandBuffer( sizeof( *cmd ) ); if ( !cmd ) { return; } cmd->commandId = RC_DRAW_BUFFER; if ( glConfig.stereoEnabled ) { if ( stereoFrame == STEREO_LEFT ) { cmd->buffer = (int)GL_BACK_LEFT; } else if ( stereoFrame == STEREO_RIGHT ) { cmd->buffer = (int)GL_BACK_RIGHT; } else { Com_Error( ERR_FATAL, "RE_BeginFrame: Stereo is enabled, but stereoFrame was %i", stereoFrame ); } } else { if ( stereoFrame != STEREO_CENTER ) { Com_Error( ERR_FATAL, "RE_BeginFrame: Stereo is disabled, but stereoFrame was %i", stereoFrame ); } // if ( !Q_stricmp( r_drawBuffer->string, "GL_FRONT" ) ) { // cmd->buffer = (int)GL_FRONT; // } else { cmd->buffer = (int)GL_BACK; } } }
/* ================= RB_ShadowTessEnd triangleFromEdge[ v1 ][ v2 ] set triangle from edge( v1, v2, tri ) if ( facing[ triangleFromEdge[ v1 ][ v2 ] ] && !facing[ triangleFromEdge[ v2 ][ v1 ] ) { } ================= */ void RB_ShadowTessEnd( void ) { int i; int numTris; vec3_t lightDir; // we can only do this if we have enough space in the vertex buffers if ( tess.numVertexes >= SHADER_MAX_VERTEXES / 2 ) { return; } if ( glConfig.stencilBits < 4 ) { return; } VectorCopy( backEnd.currentEntity->lightDir, lightDir ); // project vertexes away from light direction for ( i = 0 ; i < tess.numVertexes ; i++ ) { VectorMA( tess.xyz[i], -512, lightDir, tess.xyz[i + tess.numVertexes] ); } // decide which triangles face the light memset( numEdgeDefs, 0, 4 * tess.numVertexes ); numTris = tess.numIndexes / 3; for ( i = 0 ; i < numTris ; i++ ) { int i1, i2, i3; vec3_t d1, d2, normal; float *v1, *v2, *v3; float d; i1 = tess.indexes[ i * 3 + 0 ]; i2 = tess.indexes[ i * 3 + 1 ]; i3 = tess.indexes[ i * 3 + 2 ]; v1 = tess.xyz[ i1 ]; v2 = tess.xyz[ i2 ]; v3 = tess.xyz[ i3 ]; VectorSubtract( v2, v1, d1 ); VectorSubtract( v3, v1, d2 ); CrossProduct( d1, d2, normal ); d = DotProduct( normal, lightDir ); if ( d > 0 ) { facing[ i ] = 1; } else { facing[ i ] = 0; } // create the edges R_AddEdgeDef( i1, i2, facing[ i ] ); R_AddEdgeDef( i2, i3, facing[ i ] ); R_AddEdgeDef( i3, i1, facing[ i ] ); } // draw the silhouette edges GL_Bind( tr.whiteImage ); qglEnable( GL_CULL_FACE ); GL_State( GLS_SRCBLEND_ONE | GLS_DSTBLEND_ZERO ); qglColor3f( 0.2f, 0.2f, 0.2f ); // don't write to the color buffer qglColorMask( GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE ); qglEnable( GL_STENCIL_TEST ); qglStencilFunc( GL_ALWAYS, 1, 255 ); // mirrors have the culling order reversed if ( backEnd.viewParms.isMirror ) { qglCullFace( GL_FRONT ); qglStencilOp( GL_KEEP, GL_KEEP, GL_INCR ); R_RenderShadowEdges(); qglCullFace( GL_BACK ); qglStencilOp( GL_KEEP, GL_KEEP, GL_DECR ); R_RenderShadowEdges(); } else { qglCullFace( GL_BACK ); qglStencilOp( GL_KEEP, GL_KEEP, GL_INCR ); R_RenderShadowEdges(); qglCullFace( GL_FRONT ); qglStencilOp( GL_KEEP, GL_KEEP, GL_DECR ); R_RenderShadowEdges(); } // reenable writing to the color buffer qglColorMask( GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE ); }
/* ================== RB_ARB2_DrawInteractions ================== */ void RB_ARB2_DrawInteractions( void ) { viewLight_t *vLight; const idMaterial *lightShader; GL_SelectTexture( 0 ); qglDisableClientState( GL_TEXTURE_COORD_ARRAY ); // // for each light, perform adding and shadowing // for ( vLight = backEnd.viewDef->viewLights ; vLight ; vLight = vLight->next ) { backEnd.vLight = vLight; // do fogging later if ( vLight->lightShader->IsFogLight() ) { continue; } if ( vLight->lightShader->IsBlendLight() ) { continue; } if ( !vLight->localInteractions && !vLight->globalInteractions && !vLight->translucentInteractions ) { continue; } lightShader = vLight->lightShader; // clear the stencil buffer if needed if ( vLight->globalShadows || vLight->localShadows ) { backEnd.currentScissor = vLight->scissorRect; if ( r_useScissor.GetBool() ) { 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 ); } qglClear( GL_STENCIL_BUFFER_BIT ); } else { // no shadows, so no need to read or write the stencil buffer // we might in theory want to use GL_ALWAYS instead of disabling // completely, to satisfy the invarience rules qglStencilFunc( GL_ALWAYS, 128, 255 ); } if ( r_useShadowVertexProgram.GetBool() ) { qglEnable( GL_VERTEX_PROGRAM_ARB ); qglBindProgramARB( GL_VERTEX_PROGRAM_ARB, VPROG_STENCIL_SHADOW ); RB_StencilShadowPass( vLight->globalShadows ); RB_ARB2_CreateDrawInteractions( vLight->localInteractions ); qglEnable( GL_VERTEX_PROGRAM_ARB ); qglBindProgramARB( GL_VERTEX_PROGRAM_ARB, VPROG_STENCIL_SHADOW ); RB_StencilShadowPass( vLight->localShadows ); RB_ARB2_CreateDrawInteractions( vLight->globalInteractions ); qglDisable( GL_VERTEX_PROGRAM_ARB ); // if there weren't any globalInteractions, it would have stayed on } else { RB_StencilShadowPass( vLight->globalShadows ); RB_ARB2_CreateDrawInteractions( vLight->localInteractions ); RB_StencilShadowPass( vLight->localShadows ); RB_ARB2_CreateDrawInteractions( vLight->globalInteractions ); } // translucent surfaces never get stencil shadowed if ( r_skipTranslucent.GetBool() ) { continue; } qglStencilFunc( GL_ALWAYS, 128, 255 ); backEnd.depthFunc = GLS_DEPTHFUNC_LESS; RB_ARB2_CreateDrawInteractions( vLight->translucentInteractions ); backEnd.depthFunc = GLS_DEPTHFUNC_EQUAL; } // disable stencil shadow test qglStencilFunc( GL_ALWAYS, 128, 255 ); GL_SelectTexture( 0 ); qglEnableClientState( GL_TEXTURE_COORD_ARRAY ); }
/* ================= RB_ShadowFinish Darken everything that is is a shadow volume. We have to delay this until everything has been shadowed, because otherwise shadows from different body parts would overlap and double darken. ================= */ void RB_ShadowFinish( void ) { if ( r_shadows->integer != 2 ) { return; } if ( glConfig.stencilBits < 4 ) { return; } #ifdef _DEBUG_STENCIL_SHADOWS return; #endif qglEnable( GL_STENCIL_TEST ); qglStencilFunc( GL_NOTEQUAL, 0, 255 ); qglStencilOp( GL_KEEP, GL_KEEP, GL_KEEP ); bool planeZeroBack = false; if (qglIsEnabled(GL_CLIP_PLANE0)) { planeZeroBack = true; qglDisable (GL_CLIP_PLANE0); } GL_Cull(CT_TWO_SIDED); //qglDisable (GL_CULL_FACE); GL_Bind( tr.whiteImage ); qglPushMatrix(); qglLoadIdentity (); // qglColor3f( 0.6f, 0.6f, 0.6f ); // GL_State( GLS_DEPTHMASK_TRUE | GLS_SRCBLEND_DST_COLOR | GLS_DSTBLEND_ZERO ); // qglColor3f( 1, 0, 0 ); // GL_State( GLS_DEPTHMASK_TRUE | GLS_SRCBLEND_ONE | GLS_DSTBLEND_ZERO ); qglColor4f( 0.0f, 0.0f, 0.0f, 0.5f ); //GL_State( GLS_DEPTHMASK_TRUE | GLS_SRCBLEND_SRC_ALPHA | GLS_DSTBLEND_ONE_MINUS_SRC_ALPHA ); GL_State( GLS_SRCBLEND_SRC_ALPHA | GLS_DSTBLEND_ONE_MINUS_SRC_ALPHA ); #ifdef HAVE_GLES GLfloat vtx[] = { -100, 100, -10, 100, 100, -10, 100, -100, -10, -100, -100, -10 }; GLboolean text = qglIsEnabled(GL_TEXTURE_COORD_ARRAY); GLboolean glcol = qglIsEnabled(GL_COLOR_ARRAY); if (text) qglDisableClientState( GL_TEXTURE_COORD_ARRAY ); if (glcol) qglDisableClientState( GL_COLOR_ARRAY ); qglVertexPointer ( 3, GL_FLOAT, 0, vtx ); qglDrawArrays( GL_TRIANGLE_FAN, 0, 4 ); if (text) qglEnableClientState( GL_TEXTURE_COORD_ARRAY ); if (glcol) qglEnableClientState( GL_COLOR_ARRAY ); #else qglBegin( GL_QUADS ); qglVertex3f( -100, 100, -10 ); qglVertex3f( 100, 100, -10 ); qglVertex3f( 100, -100, -10 ); qglVertex3f( -100, -100, -10 ); qglEnd (); #endif qglColor4f(1,1,1,1); qglDisable( GL_STENCIL_TEST ); if (planeZeroBack) { qglEnable (GL_CLIP_PLANE0); } qglPopMatrix(); }
/* ================= RB_ShadowTessEnd triangleFromEdge[ v1 ][ v2 ] set triangle from edge( v1, v2, tri ) if ( facing[ triangleFromEdge[ v1 ][ v2 ] ] && !facing[ triangleFromEdge[ v2 ][ v1 ] ) { } ================= */ void RB_ShadowTessEnd( void ) { int i; int numTris; vec3_t lightDir; GLboolean rgba[4]; if ( glConfig.stencilBits < 4 ) { return; } VectorCopy( backEnd.currentEntity->lightDir, lightDir ); // project vertexes away from light direction for ( i = 0 ; i < tess.numVertexes ; i++ ) { VectorMA( tess.xyz[i], -512, lightDir, shadowXyz[i] ); } // decide which triangles face the light Com_Memset( numEdgeDefs, 0, 4 * tess.numVertexes ); numTris = tess.numIndexes / 3; for ( i = 0 ; i < numTris ; i++ ) { int i1, i2, i3; vec3_t d1, d2, normal; float *v1, *v2, *v3; float d; i1 = tess.indexes[ i*3 + 0 ]; i2 = tess.indexes[ i*3 + 1 ]; i3 = tess.indexes[ i*3 + 2 ]; v1 = tess.xyz[ i1 ]; v2 = tess.xyz[ i2 ]; v3 = tess.xyz[ i3 ]; VectorSubtract( v2, v1, d1 ); VectorSubtract( v3, v1, d2 ); CrossProduct( d1, d2, normal ); d = DotProduct( normal, lightDir ); if ( d > 0 ) { facing[ i ] = 1; } else { facing[ i ] = 0; } // create the edges R_AddEdgeDef( i1, i2, facing[ i ] ); R_AddEdgeDef( i2, i3, facing[ i ] ); R_AddEdgeDef( i3, i1, facing[ i ] ); } // draw the silhouette edges GL_Bind( tr.whiteImage ); GL_State( GLS_SRCBLEND_ONE | GLS_DSTBLEND_ZERO ); qglColor3f( 0.2f, 0.2f, 0.2f ); // don't write to the color buffer qglGetBooleanv(GL_COLOR_WRITEMASK, rgba); qglColorMask( GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE ); qglEnable( GL_STENCIL_TEST ); qglStencilFunc( GL_ALWAYS, 1, 255 ); GL_Cull( CT_BACK_SIDED ); qglStencilOp( GL_KEEP, GL_KEEP, GL_INCR ); R_RenderShadowEdges(); GL_Cull( CT_FRONT_SIDED ); qglStencilOp( GL_KEEP, GL_KEEP, GL_DECR ); R_RenderShadowEdges(); // reenable writing to the color buffer qglColorMask(rgba[0], rgba[1], rgba[2], rgba[3]); }
/* ==================== RE_BeginFrame If running in stereo, RE_BeginFrame will be called twice for each RE_EndFrame ==================== */ void RE_BeginFrame( stereoFrame_t stereoFrame ) { drawBufferCommand_t *cmd; if ( !tr.registered ) { return; } glState.finishCalled = qfalse; tr.frameCount++; tr.frameSceneNum = 0; backEnd.traceShader = tr.traceShader; backEnd.doneBloom = qfalse; backEnd.doneSurfaces = qfalse; backEnd.sceneZfar = 2048; tr.traceShader = qfalse; // // do overdraw measurement // if ( r_measureOverdraw->integer ) { if ( glConfig.stencilBits < 4 ) { ri.Printf( PRINT_ALL, "Warning: not enough stencil bits to measure overdraw: %d\n", glConfig.stencilBits ); ri.Cvar_Set( "r_measureOverdraw", "0" ); r_measureOverdraw->modified = qfalse; } else if ( r_shadows->integer == 2 ) { ri.Printf( PRINT_ALL, "Warning: stencil shadows and overdraw measurement are mutually exclusive\n" ); ri.Cvar_Set( "r_measureOverdraw", "0" ); r_measureOverdraw->modified = qfalse; } else if ( mme_saveStencil->integer ) { ri.Printf( PRINT_ALL, "Warning: mme stencil masks and overdraw measurement are mutually exclusive\n" ); ri.Cvar_Set( "r_measureOverdraw", "0" ); r_measureOverdraw->modified = qfalse; } else { R_SyncRenderThread(); qglEnable( GL_STENCIL_TEST ); qglStencilMask( ~0U ); qglClearStencil( 0U ); qglStencilFunc( GL_ALWAYS, 0U, ~0U ); qglStencilOp( GL_KEEP, GL_INCR, GL_INCR ); } r_measureOverdraw->modified = qfalse; } else { // this is only reached if it was on and is now off if ( r_measureOverdraw->modified ) { R_SyncRenderThread(); qglDisable( GL_STENCIL_TEST ); } r_measureOverdraw->modified = qfalse; } if ( mme_saveStencil->integer == 1 ) { R_SyncRenderThread(); qglEnable( GL_STENCIL_TEST ); qglStencilMask( ~0U ); qglClearStencil( 0U ); qglStencilFunc( GL_ALWAYS, 255U, 255U ); qglStencilOp( GL_KEEP, GL_KEEP, GL_ZERO ); backEnd.doingStencil = qfalse; } else if ( mme_saveStencil->integer == 2 ) { R_SyncRenderThread(); qglEnable( GL_STENCIL_TEST ); qglStencilMask( ~0U ); qglClearStencil( 0U ); qglStencilFunc( GL_ALWAYS, 255U, 255U ); qglStencilOp( GL_KEEP, GL_KEEP, GL_REPLACE ); backEnd.doingStencil = qfalse; } else { qglDisable( GL_STENCIL_TEST ); } // // texturemode stuff // if ( r_textureMode->modified ) { R_SyncRenderThread(); GL_TextureMode( r_textureMode->string ); r_textureMode->modified = qfalse; } if ( r_anisotropy->modified ) { R_SyncRenderThread(); GL_Anisotropy( r_anisotropy->integer ); r_anisotropy->modified = qfalse; } // // gamma stuff // if ( r_gamma->modified ) { r_gamma->modified = qfalse; R_SyncRenderThread(); R_SetColorMappings(); } // check for errors if ( !r_ignoreGLErrors->integer ) { int err; R_SyncRenderThread(); if ( ( err = qglGetError() ) != GL_NO_ERROR ) { ri.Error( ERR_FATAL, "RE_BeginFrame() - glGetError() failed (0x%x)!\n", err ); } } if ( mme_worldShader->modified) { if (R_FindShaderText( mme_worldShader->string )) { tr.mmeWorldShader = R_FindShader( mme_worldShader->string, LIGHTMAP_NONE, qtrue ); } else { tr.mmeWorldShader = 0; } mme_worldShader->modified = qfalse; } if ( mme_pip->integer ) { tr.mmeWorldShader = R_FindShader( "mme/pip", -1, qtrue ); } // // draw buffer stuff // cmd = R_GetCommandBuffer( RC_DRAW_BUFFER, sizeof( *cmd ) ); if ( !cmd ) { return; } if ( glConfig.stereoEnabled ) { if ( stereoFrame == STEREO_LEFT ) { cmd->buffer = (int)GL_BACK_LEFT; } else if ( stereoFrame == STEREO_RIGHT ) { cmd->buffer = (int)GL_BACK_RIGHT; } else { ri.Error( ERR_FATAL, "RE_BeginFrame: Stereo is enabled, but stereoFrame was %i", stereoFrame ); } } else { if ( stereoFrame != STEREO_CENTER ) { ri.Error( ERR_FATAL, "RE_BeginFrame: Stereo is disabled, but stereoFrame was %i", stereoFrame ); } if ( !Q_stricmp( r_drawBuffer->string, "GL_FRONT" ) ) { cmd->buffer = (int)GL_FRONT; } else { cmd->buffer = (int)GL_BACK; } } }