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542 lines
19 KiB
542 lines
19 KiB
//========= Copyright Valve Corporation, All rights reserved. ============// |
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// |
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// Purpose: |
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// |
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// $Workfile: $ |
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// $Date: $ |
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// $NoKeywords: $ |
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//===========================================================================// |
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#include "r_studiolight.h" |
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#include "studiorender.h" |
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#include "studiorendercontext.h" |
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#include "studio.h" |
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#include "materialsystem/imaterialsystemhardwareconfig.h" |
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#include "mathlib/vector.h" |
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#include "mathlib/mathlib.h" |
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#include <float.h> |
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// memdbgon must be the last include file in a .cpp file!!! |
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#include "tier0/memdbgon.h" |
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void R_WorldLightDelta( const LightDesc_t *wl, const Vector& org, Vector& delta ); |
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//----------------------------------------------------------------------------- |
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// Copies lighting state |
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//----------------------------------------------------------------------------- |
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int CopyLocalLightingState( int nMaxLights, LightDesc_t *pDest, int nLightCount, const LightDesc_t *pSrc ) |
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{ |
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// ensure we write within array bounds |
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if ( nLightCount > nMaxLights ) |
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{ |
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nLightCount = nMaxLights; |
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} |
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for( int i = 0; i < nLightCount; i++ ) |
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{ |
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LightDesc_t *pLight = &pDest[i]; |
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*pLight = pSrc[i]; |
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pLight->m_Flags = 0; |
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if( pLight->m_Attenuation0 != 0.0f ) |
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{ |
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pLight->m_Flags |= LIGHTTYPE_OPTIMIZATIONFLAGS_HAS_ATTENUATION0; |
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} |
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if( pLight->m_Attenuation1 != 0.0f ) |
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{ |
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pLight->m_Flags |= LIGHTTYPE_OPTIMIZATIONFLAGS_HAS_ATTENUATION1; |
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} |
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if( pLight->m_Attenuation2 != 0.0f ) |
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{ |
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pLight->m_Flags |= LIGHTTYPE_OPTIMIZATIONFLAGS_HAS_ATTENUATION2; |
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} |
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} |
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return nLightCount; |
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} |
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//----------------------------------------------------------------------------- |
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// Computes the ambient term |
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//----------------------------------------------------------------------------- |
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void R_LightAmbient_4D( const Vector& normal, Vector4D* pLightBoxColor, Vector &lv ) |
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{ |
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VectorScale( normal[0] > 0.f ? pLightBoxColor[0].AsVector3D() : pLightBoxColor[1].AsVector3D(), normal[0]*normal[0], lv ); |
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VectorMA( lv, normal[1]*normal[1], normal[1] > 0.f ? pLightBoxColor[2].AsVector3D() : pLightBoxColor[3].AsVector3D(), lv ); |
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VectorMA( lv, normal[2]*normal[2], normal[2] > 0.f ? pLightBoxColor[4].AsVector3D() : pLightBoxColor[5].AsVector3D(), lv ); |
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} |
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#if defined( _WIN32 ) && !defined( _X360 ) |
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void R_LightAmbient_4D( const FourVectors& normal, Vector4D* pLightBoxColor, FourVectors &lv ) |
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{ |
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// VPROF( "R_LightAmbient" ); |
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// !!speed!! compute ambient color cube in sse format |
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static fltx4 FourZeros={0.,0.,0.,.0}; |
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// find the contributions from each axis |
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fltx4 NegMask=CmpLtSIMD(normal.x,FourZeros); |
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fltx4 ColorSelect0=ReplicateX4(pLightBoxColor[0].AsVector3D().x); |
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fltx4 ColorSelect1=ReplicateX4(pLightBoxColor[1].AsVector3D().x); |
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fltx4 DirectionalColor=OrSIMD(AndSIMD(ColorSelect1,NegMask),AndNotSIMD(NegMask,ColorSelect0)); |
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fltx4 NormCompSquared=MulSIMD(normal.x,normal.x); |
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lv.x=MulSIMD(DirectionalColor,NormCompSquared); |
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ColorSelect0=ReplicateX4(pLightBoxColor[0].AsVector3D().y); |
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ColorSelect1=ReplicateX4(pLightBoxColor[1].AsVector3D().y); |
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DirectionalColor=OrSIMD(AndSIMD(ColorSelect1,NegMask),AndNotSIMD(NegMask,ColorSelect0)); |
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lv.y=MulSIMD(DirectionalColor,NormCompSquared); |
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ColorSelect0=ReplicateX4(pLightBoxColor[0].AsVector3D().z); |
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ColorSelect1=ReplicateX4(pLightBoxColor[1].AsVector3D().z); |
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DirectionalColor=OrSIMD(AndSIMD(ColorSelect1,NegMask),AndNotSIMD(NegMask,ColorSelect0)); |
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lv.z=MulSIMD(DirectionalColor,NormCompSquared); |
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NegMask=CmpLtSIMD(normal.y,FourZeros); |
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ColorSelect0=ReplicateX4(pLightBoxColor[2].AsVector3D().x); |
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ColorSelect1=ReplicateX4(pLightBoxColor[3].AsVector3D().x); |
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DirectionalColor=OrSIMD(AndSIMD(ColorSelect1,NegMask),AndNotSIMD(NegMask,ColorSelect0)); |
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NormCompSquared=MulSIMD(normal.y,normal.y); |
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lv.x=AddSIMD(lv.x,MulSIMD(DirectionalColor,NormCompSquared)); |
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ColorSelect0=ReplicateX4(pLightBoxColor[2].AsVector3D().y); |
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ColorSelect1=ReplicateX4(pLightBoxColor[3].AsVector3D().y); |
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DirectionalColor=OrSIMD(AndSIMD(ColorSelect1,NegMask),AndNotSIMD(NegMask,ColorSelect0)); |
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lv.y=AddSIMD(lv.y,MulSIMD(DirectionalColor,NormCompSquared)); |
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ColorSelect0=ReplicateX4(pLightBoxColor[2].AsVector3D().z); |
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ColorSelect1=ReplicateX4(pLightBoxColor[3].AsVector3D().z); |
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DirectionalColor=OrSIMD(AndSIMD(ColorSelect1,NegMask),AndNotSIMD(NegMask,ColorSelect0)); |
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lv.z=AddSIMD(lv.z,MulSIMD(DirectionalColor,NormCompSquared)); |
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NegMask=CmpLtSIMD(normal.z,FourZeros); |
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ColorSelect0=ReplicateX4(pLightBoxColor[4].AsVector3D().x); |
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ColorSelect1=ReplicateX4(pLightBoxColor[5].AsVector3D().x); |
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DirectionalColor=OrSIMD(AndSIMD(ColorSelect1,NegMask),AndNotSIMD(NegMask,ColorSelect0)); |
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NormCompSquared=MulSIMD(normal.z,normal.z); |
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lv.x=AddSIMD(lv.x,MulSIMD(DirectionalColor,NormCompSquared)); |
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ColorSelect0=ReplicateX4(pLightBoxColor[4].AsVector3D().y); |
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ColorSelect1=ReplicateX4(pLightBoxColor[5].AsVector3D().y); |
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DirectionalColor=OrSIMD(AndSIMD(ColorSelect1,NegMask),AndNotSIMD(NegMask,ColorSelect0)); |
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lv.y=AddSIMD(lv.y,MulSIMD(DirectionalColor,NormCompSquared)); |
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ColorSelect0=ReplicateX4(pLightBoxColor[4].AsVector3D().z); |
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ColorSelect1=ReplicateX4(pLightBoxColor[5].AsVector3D().z); |
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DirectionalColor=OrSIMD(AndSIMD(ColorSelect1,NegMask),AndNotSIMD(NegMask,ColorSelect0)); |
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lv.z=AddSIMD(lv.z,MulSIMD(DirectionalColor,NormCompSquared)); |
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} |
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#endif |
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//----------------------------------------------------------------------------- |
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// Computes the ambient term, parameters are 3D Vectors for optimization |
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//----------------------------------------------------------------------------- |
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void R_LightAmbient_3D( const Vector& normal, const Vector* pLightBoxColor, Vector &lv ) |
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{ |
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VectorScale( normal[0] > 0.f ? pLightBoxColor[0] : pLightBoxColor[1], normal[0]*normal[0], lv ); |
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VectorMA( lv, normal[1]*normal[1], normal[1] > 0.f ? pLightBoxColor[2] : pLightBoxColor[3], lv ); |
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VectorMA( lv, normal[2]*normal[2], normal[2] > 0.f ? pLightBoxColor[4] : pLightBoxColor[5], lv ); |
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} |
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//----------------------------------------------------------------------------- |
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// Set up light[i].dot, light[i].falloff, and light[i].delta for all lights given |
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// a vertex position "vert". |
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//----------------------------------------------------------------------------- |
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void R_LightStrengthWorld( const Vector& vert, int lightcount, LightDesc_t* pDesc, lightpos_t *light ) |
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{ |
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// VPROF( "R_LightStrengthWorld" ); |
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// NJS: note to self, maybe switch here based on lightcount, so multiple squareroots can be done simeltaneously? |
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for ( int i = 0; i < lightcount; i++) |
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{ |
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R_WorldLightDelta( &pDesc[i], vert, light[i].delta ); |
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light[i].falloff = R_WorldLightDistanceFalloff( &pDesc[i], light[i].delta ); |
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VectorNormalizeFast( light[i].delta ); |
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light[i].dot = DotProduct( light[i].delta, pDesc[i].m_Direction ); |
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} |
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} |
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//----------------------------------------------------------------------------- |
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// Calculate the delta between a light and position |
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//----------------------------------------------------------------------------- |
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void R_WorldLightDelta( const LightDesc_t *wl, const Vector& org, Vector& delta ) |
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{ |
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switch (wl->m_Type) |
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{ |
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case MATERIAL_LIGHT_POINT: |
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case MATERIAL_LIGHT_SPOT: |
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VectorSubtract( wl->m_Position, org, delta ); |
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break; |
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case MATERIAL_LIGHT_DIRECTIONAL: |
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VectorMultiply( wl->m_Direction, -1, delta ); |
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break; |
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default: |
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// Bug: need to return an error |
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Assert( 0 ); |
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break; |
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} |
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} |
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//#define NO_AMBIENT_CUBE 1 |
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// TODO: cone clipping calc's wont work for boxlight since the player asks for a single point. Not sure what the volume is. |
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TEMPLATE_FUNCTION_TABLE( void, R_LightEffectsWorldFunctionTable, ( const LightDesc_t* pLightDesc, const lightpos_t *light, const Vector& normal, Vector &dest ), 256 ) |
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{ |
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enum |
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{ |
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LightType1 = ( nArgument & 0xC0 ) >> 6, |
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LightType2 = ( nArgument & 0x30 ) >> 4, |
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LightType3 = ( nArgument & 0x0C ) >> 2, |
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LightType4 = ( nArgument & 0x03 ) |
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}; |
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// VPROF( "R_LightEffectsWorld" ); |
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#ifdef NO_AMBIENT_CUBE |
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dest[0] = dest[1] = dest[2] = 0.0f; |
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#endif |
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// FIXME: lighting effects for normal and position are independent! |
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// FIXME: these can be pre-calculated per normal |
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if( (LightType_t)LightType1 != MATERIAL_LIGHT_DISABLE ) |
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{ |
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float ratio = light[0].falloff * CWorldLightAngleWrapper<LightType1>::WorldLightAngle( &pLightDesc[0], pLightDesc[0].m_Direction, normal, light[0].delta ); |
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if (ratio > 0) |
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{ |
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const float* pColor = (float*)&pLightDesc[0].m_Color; |
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dest[0] += pColor[0] * ratio; |
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dest[1] += pColor[1] * ratio; |
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dest[2] += pColor[2] * ratio; |
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} |
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} |
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if( (LightType_t)LightType2 != MATERIAL_LIGHT_DISABLE ) |
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{ |
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float ratio = light[1].falloff * CWorldLightAngleWrapper<LightType2>::WorldLightAngle( &pLightDesc[1], pLightDesc[1].m_Direction, normal, light[1].delta ); |
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if (ratio > 0) |
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{ |
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const float* pColor = (float*)&pLightDesc[1].m_Color; |
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dest[0] += pColor[0] * ratio; |
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dest[1] += pColor[1] * ratio; |
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dest[2] += pColor[2] * ratio; |
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} |
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} |
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if( (LightType_t)LightType3 != MATERIAL_LIGHT_DISABLE ) |
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{ |
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float ratio = light[2].falloff * CWorldLightAngleWrapper<LightType3>::WorldLightAngle( &pLightDesc[2], pLightDesc[2].m_Direction, normal, light[2].delta ); |
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if (ratio > 0) |
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{ |
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const float* pColor = (float*)&pLightDesc[2].m_Color; |
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dest[0] += pColor[0] * ratio; |
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dest[1] += pColor[1] * ratio; |
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dest[2] += pColor[2] * ratio; |
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} |
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} |
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if( (LightType_t)LightType4 != MATERIAL_LIGHT_DISABLE ) |
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{ |
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float ratio = light[3].falloff * CWorldLightAngleWrapper<LightType4>::WorldLightAngle( &pLightDesc[3], pLightDesc[3].m_Direction, normal, light[3].delta ); |
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if (ratio > 0) |
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{ |
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const float* pColor = (float*)&pLightDesc[3].m_Color; |
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dest[0] += pColor[0] * ratio; |
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dest[1] += pColor[1] * ratio; |
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dest[2] += pColor[2] * ratio; |
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} |
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} |
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} |
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TEMPLATE_FUNCTION_TABLE( void, R_LightEffectsWorldFunctionTableConstDirectional, ( const LightDesc_t* pLightDesc, const lightpos_t *light, const Vector& normal, Vector &dest, float flDirectionalConstant ), 256 ) |
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{ |
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enum |
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{ |
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LightType1 = ( nArgument & 0xC0 ) >> 6, |
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LightType2 = ( nArgument & 0x30 ) >> 4, |
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LightType3 = ( nArgument & 0x0C ) >> 2, |
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LightType4 = ( nArgument & 0x03 ) |
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}; |
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// VPROF( "R_LightEffectsWorld" ); |
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#ifdef NO_AMBIENT_CUBE |
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dest[0] = dest[1] = dest[2] = 0.0f; |
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#endif |
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// FIXME: lighting effects for normal and position are independent! |
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// FIXME: these can be pre-calculated per normal |
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if( (LightType_t)LightType1 != MATERIAL_LIGHT_DISABLE ) |
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{ |
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float ratio = light[0].falloff * |
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CWorldLightAngleWrapperConstDirectional<LightType1>::WorldLightAngle( &pLightDesc[0], |
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pLightDesc[0].m_Direction, normal, light[0].delta, flDirectionalConstant ); |
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if (ratio > 0) |
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{ |
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const float* pColor = (float*)&pLightDesc[0].m_Color; |
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dest[0] += pColor[0] * ratio; |
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dest[1] += pColor[1] * ratio; |
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dest[2] += pColor[2] * ratio; |
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} |
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} |
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if( (LightType_t)LightType2 != MATERIAL_LIGHT_DISABLE ) |
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{ |
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float ratio = light[1].falloff * |
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CWorldLightAngleWrapperConstDirectional<LightType2>::WorldLightAngle( &pLightDesc[1], |
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pLightDesc[1].m_Direction, normal, light[1].delta, flDirectionalConstant ); |
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if (ratio > 0) |
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{ |
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const float* pColor = (float*)&pLightDesc[1].m_Color; |
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dest[0] += pColor[0] * ratio; |
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dest[1] += pColor[1] * ratio; |
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dest[2] += pColor[2] * ratio; |
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} |
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} |
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if( (LightType_t)LightType3 != MATERIAL_LIGHT_DISABLE ) |
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{ |
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float ratio = light[2].falloff * |
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CWorldLightAngleWrapperConstDirectional<LightType3>::WorldLightAngle( &pLightDesc[2], |
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pLightDesc[2].m_Direction, normal, light[2].delta, flDirectionalConstant ); |
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if (ratio > 0) |
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{ |
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const float* pColor = (float*)&pLightDesc[2].m_Color; |
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dest[0] += pColor[0] * ratio; |
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dest[1] += pColor[1] * ratio; |
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dest[2] += pColor[2] * ratio; |
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} |
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} |
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if( (LightType_t)LightType4 != MATERIAL_LIGHT_DISABLE ) |
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{ |
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float ratio = light[3].falloff * |
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CWorldLightAngleWrapperConstDirectional<LightType4>::WorldLightAngle( &pLightDesc[3], |
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pLightDesc[3].m_Direction, normal, light[3].delta, flDirectionalConstant ); |
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if (ratio > 0) |
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{ |
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const float* pColor = (float*)&pLightDesc[3].m_Color; |
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dest[0] += pColor[0] * ratio; |
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dest[1] += pColor[1] * ratio; |
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dest[2] += pColor[2] * ratio; |
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} |
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} |
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} |
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//----------------------------------------------------------------------------- |
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// Get the function table index |
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//----------------------------------------------------------------------------- |
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static int s_pLightMask[ 5 ] = |
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{ |
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0, // No lights |
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0xC0, // 1 light |
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0xF0, // 2 lights |
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0xFC, // 3 lights |
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0xFF, // 4 lights |
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}; |
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inline int R_LightEffectsWorldIndex(const LightDesc_t* pLightDesc, int nNumLights) |
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{ |
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if ( nNumLights > 4 ) |
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{ |
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nNumLights = 4; |
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} |
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int nIndex = ((pLightDesc[0].m_Type & 0x3) << 6) | ((pLightDesc[1].m_Type & 0x3) << 4) | ( (pLightDesc[2].m_Type & 0x3) << 2) | (pLightDesc[3].m_Type & 0x3); |
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nIndex &= s_pLightMask[ nNumLights ]; |
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Assert( nIndex >= 0 && nIndex < R_LightEffectsWorldFunctionTable::count ); |
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return nIndex; |
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} |
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/* |
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light_direction (light_pos - vertex_pos) |
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*/ |
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// TODO: move cone calcs to position |
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// TODO: cone clipping calc's wont work for boxlight since the player asks for a single point. Not sure what the volume is. |
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TEMPLATE_FUNCTION_TABLE( float, R_WorldLightDistanceFalloffFunctionTable, ( const LightDesc_t *wl, const Vector& delta ), 8) |
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{ |
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Assert( nArgument != 0 ); |
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float dist2 = DotProduct( delta, delta ); |
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// Cull out light beyond this radius |
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if (wl->m_Range != 0.f) |
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{ |
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if (dist2 > wl->m_Range * wl->m_Range) |
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return 0.0f; |
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} |
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// The general purpose equation: |
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float fTotal = FLT_EPSILON; |
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if( nArgument & LIGHTTYPE_OPTIMIZATIONFLAGS_HAS_ATTENUATION0 ) |
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{ |
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fTotal = wl->m_Attenuation0; |
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} |
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if( nArgument & LIGHTTYPE_OPTIMIZATIONFLAGS_HAS_ATTENUATION1 ) |
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{ |
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fTotal += wl->m_Attenuation1 * FastSqrt( dist2 ); |
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} |
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if( nArgument & LIGHTTYPE_OPTIMIZATIONFLAGS_HAS_ATTENUATION2 ) |
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{ |
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fTotal += wl->m_Attenuation2 * dist2; |
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} |
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return 1.0f / fTotal; |
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} |
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//----------------------------------------------------------------------------- |
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// Calculate the falloff from the world lights |
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//----------------------------------------------------------------------------- |
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float FASTCALL R_WorldLightDistanceFalloff( const LightDesc_t *wl, const Vector& delta ) |
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{ |
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// Ensure no invalid flags are set |
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Assert( ! ( wl->m_Flags & ~(LIGHTTYPE_OPTIMIZATIONFLAGS_HAS_ATTENUATION0|LIGHTTYPE_OPTIMIZATIONFLAGS_HAS_ATTENUATION1|LIGHTTYPE_OPTIMIZATIONFLAGS_HAS_ATTENUATION2|LIGHTTYPE_OPTIMIZATIONFLAGS_DERIVED_VALUES_CALCED) ) ); |
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// calculate falloff |
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int flags = wl->m_Flags & (LIGHTTYPE_OPTIMIZATIONFLAGS_HAS_ATTENUATION0|LIGHTTYPE_OPTIMIZATIONFLAGS_HAS_ATTENUATION1|LIGHTTYPE_OPTIMIZATIONFLAGS_HAS_ATTENUATION2); |
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return R_WorldLightDistanceFalloffFunctionTable::functions[flags](wl, delta); |
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} |
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#if defined( _WIN32 ) && !defined( _X360 ) |
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fltx4 FASTCALL R_WorldLightDistanceFalloff( const LightDesc_t *wl, const FourVectors &delta ) |
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{ |
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// !!speed!!: lights could store m_Attenuation2,m_Attenuation1, and m_Range^2 copies in replicated SSE format. |
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// Ensure no invalid flags are set |
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Assert( ! ( wl->m_Flags & ~(LIGHTTYPE_OPTIMIZATIONFLAGS_HAS_ATTENUATION0|LIGHTTYPE_OPTIMIZATIONFLAGS_HAS_ATTENUATION1|LIGHTTYPE_OPTIMIZATIONFLAGS_HAS_ATTENUATION2|LIGHTTYPE_OPTIMIZATIONFLAGS_DERIVED_VALUES_CALCED) ) ); |
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fltx4 dist2 = delta*delta; |
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fltx4 fTotal; |
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if( wl->m_Flags & LIGHTTYPE_OPTIMIZATIONFLAGS_HAS_ATTENUATION0 ) |
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{ |
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fTotal = ReplicateX4(wl->m_Attenuation0); |
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} |
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else |
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fTotal= ReplicateX4(FLT_EPSILON); // !!speed!! replicate |
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if( wl->m_Flags & LIGHTTYPE_OPTIMIZATIONFLAGS_HAS_ATTENUATION1 ) |
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{ |
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fTotal=AddSIMD(fTotal,MulSIMD(ReplicateX4(wl->m_Attenuation1),SqrtEstSIMD(dist2))); |
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} |
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if( wl->m_Flags & LIGHTTYPE_OPTIMIZATIONFLAGS_HAS_ATTENUATION2 ) |
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{ |
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fTotal=AddSIMD(fTotal,MulSIMD(ReplicateX4(wl->m_Attenuation2),dist2)); |
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} |
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fTotal=ReciprocalEstSIMD(fTotal); |
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// Cull out light beyond this radius |
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// now, zero out elements for which dist2 was > range^2. !!speed!! lights should store dist^2 in sse format |
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if (wl->m_Range != 0.f) |
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{ |
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fltx4 RangeSquared = ReplicateX4(wl->m_Range*wl->m_Range); // !!speed!! |
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fTotal=AndSIMD(fTotal,CmpLtSIMD(dist2,RangeSquared)); |
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} |
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return fTotal; |
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} |
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#endif |
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int CStudioRender::R_LightGlintPosition( int index, const Vector& org, Vector& delta, Vector& intensity ) |
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{ |
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if (index >= m_pRC->m_NumLocalLights) |
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return false; |
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R_WorldLightDelta( &m_pRC->m_LocalLights[index], org, delta ); |
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float falloff = R_WorldLightDistanceFalloff( &m_pRC->m_LocalLights[index], delta ); |
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VectorMultiply( m_pRC->m_LocalLights[index].m_Color, falloff, intensity ); |
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return true; |
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} |
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//----------------------------------------------------------------------------- |
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// Setup up the function table |
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//----------------------------------------------------------------------------- |
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void CStudioRender::R_InitLightEffectsWorld3() |
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{ |
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// set the function pointer |
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int index = R_LightEffectsWorldIndex( m_pRC->m_LocalLights, m_pRC->m_NumLocalLights ); |
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R_LightEffectsWorld3 = R_LightEffectsWorldFunctionTable::functions[index]; |
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} |
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//----------------------------------------------------------------------------- |
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// Performs lighting functions common to the ComputeLighting and ComputeLightingConstantDirectional |
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// returns the index of the LightEffectsWorldFunction to use |
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//----------------------------------------------------------------------------- |
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static int ComputeLightingCommon( const Vector* pAmbient, int lightCount, |
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LightDesc_t* pLights, const Vector& pt, const Vector& normal, lightpos_t *pLightPos, Vector& lighting ) |
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{ |
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// Set up lightpos[i].dot, lightpos[i].falloff, and lightpos[i].delta for all lights |
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R_LightStrengthWorld( pt, lightCount, pLights, pLightPos ); |
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|
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// calculate ambient values from the ambient cube given a normal. |
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R_LightAmbient_3D( normal, pAmbient, lighting ); |
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return R_LightEffectsWorldIndex( pLights, lightCount ); |
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} |
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//----------------------------------------------------------------------------- |
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// Compute the lighting at a point and normal |
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// Final Lighting is in linear space |
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//----------------------------------------------------------------------------- |
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void CStudioRenderContext::ComputeLighting( const Vector* pAmbient, int lightCount, |
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LightDesc_t* pLights, const Vector& pt, const Vector& normal, Vector& lighting ) |
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{ |
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if ( m_RC.m_Config.fullbright ) |
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{ |
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lighting.Init( 1.0f, 1.0f, 1.0f ); |
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return; |
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} |
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if ( lightCount > ARRAYSIZE( m_pLightPos ) ) |
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{ |
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AssertMsg( 0, "Light count out of range in ComputeLighting\n" ); |
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lightCount = ARRAYSIZE( m_pLightPos ); |
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} |
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// Calculate color given lightpos_t lightpos, a normal, and the ambient |
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// color from the ambient cube calculated in ComputeLightingCommon |
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int index = ComputeLightingCommon( pAmbient, lightCount, pLights, pt, normal, m_pLightPos, lighting ); |
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R_LightEffectsWorldFunctionTable::functions[index]( pLights, m_pLightPos, normal, lighting ); |
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} |
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//----------------------------------------------------------------------------- |
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// Compute the lighting at a point and normal |
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// Final Lighting is in linear space |
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// Uses flDirectionalAmount instead of directional components of lights |
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//----------------------------------------------------------------------------- |
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void CStudioRenderContext::ComputeLightingConstDirectional( const Vector* pAmbient, int lightCount, |
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LightDesc_t* pLights, const Vector& pt, const Vector& normal, Vector& lighting, float flDirectionalAmount ) |
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{ |
|
if ( m_RC.m_Config.fullbright ) |
|
{ |
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lighting.Init( 1.0f, 1.0f, 1.0f ); |
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return; |
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} |
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|
|
if ( lightCount > ARRAYSIZE( m_pLightPos ) ) |
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{ |
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AssertMsg( 0, "Light count out of range in ComputeLighting\n" ); |
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lightCount = ARRAYSIZE( m_pLightPos ); |
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} |
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|
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// Calculate color given lightpos_t lightpos, a normal, and the ambient |
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// color from the ambient cube calculated in ComputeLightingCommon |
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int index = ComputeLightingCommon( pAmbient, lightCount, pLights, pt, normal, m_pLightPos, lighting ); |
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R_LightEffectsWorldFunctionTableConstDirectional::functions[index]( pLights, m_pLightPos, normal, lighting, flDirectionalAmount ); |
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}
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