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https://github.com/nillerusr/source-engine.git
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150 lines
4.7 KiB
Plaintext
150 lines
4.7 KiB
Plaintext
//======= Copyright © 1996-2007, Valve Corporation, All rights reserved. ======
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// STATIC: "INTRO" "0..1"
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// DYNAMIC: "COMPRESSED_VERTS" "0..1"
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// DYNAMIC: "DOWATERFOG" "0..1"
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// DYNAMIC: "SKINNING" "0..1"
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// DYNAMIC: "MORPHING" "0..1" [vs30]
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#include "vortwarp_vs20_helper.h"
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static const int g_FogType = DOWATERFOG;
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static const bool g_bSkinning = SKINNING ? true : false;
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const float4 cFlashlightPosition : register( SHADER_SPECIFIC_CONST_0 );
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const float4 cSpotlightProj1 : register( SHADER_SPECIFIC_CONST_1 );
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const float4 cSpotlightProj2 : register( SHADER_SPECIFIC_CONST_2 );
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const float4 cSpotlightProj3 : register( SHADER_SPECIFIC_CONST_3 );
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const float4 cSpotlightProj4 : register( SHADER_SPECIFIC_CONST_4 );
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const float4 cFlashlighAtten : register( SHADER_SPECIFIC_CONST_5 ); // const, linear, quadratic & farZ
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const float4 cTeethLighting : register( SHADER_SPECIFIC_CONST_8 );
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#if INTRO
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const float4 const4 : register( SHADER_SPECIFIC_CONST_9 );
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#define g_Time const4.w
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#define modelOrigin const4.xyz
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#endif
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#ifdef SHADER_MODEL_VS_3_0
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// NOTE: cMorphTargetTextureDim.xy = target dimensions,
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// cMorphTargetTextureDim.z = 4tuples/morph
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const float3 cMorphTargetTextureDim : register( SHADER_SPECIFIC_CONST_6 );
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const float4 cMorphSubrect : register( SHADER_SPECIFIC_CONST_7 );
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sampler2D morphSampler : register( D3DVERTEXTEXTURESAMPLER0, s0 );
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#endif
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struct VS_INPUT
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{
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// This is all of the stuff that we ever use.
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float4 vPos : POSITION;
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float4 vBoneWeights : BLENDWEIGHT;
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float4 vBoneIndices : BLENDINDICES;
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float4 vNormal : NORMAL;
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float2 vTexCoord0 : TEXCOORD0;
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// Position and normal/tangent deltas
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float3 vPosFlex : POSITION1;
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float3 vNormalFlex : NORMAL1;
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#ifdef SHADER_MODEL_VS_3_0
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float vVertexID : POSITION2;
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#endif
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};
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struct VS_OUTPUT
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{
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float4 projPos : POSITION;
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#if !defined( _X360 )
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float fog : FOG;
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#endif
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float2 baseTexCoord : TEXCOORD0; // Base texture coordinates
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float4 spotTexCoord : TEXCOORD1; // Spotlight texture coordinates
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float3 vertAtten : TEXCOORD2; // Distance/spot attenuation
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float4 vProjPos : TEXCOORD3; // Projective space position
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float3 worldPos : TEXCOORD4; // Necessary for pixel fog
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};
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float RemapValClamped_01( float val, float A, float B )
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{
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float cVal = (val - A) / (B - A);
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cVal = saturate( cVal );
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return cVal;
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}
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VS_OUTPUT main( const VS_INPUT v )
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{
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VS_OUTPUT o = ( VS_OUTPUT )0;
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float4 vPosition = v.vPos;
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float3 vNormal;
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DecompressVertex_Normal( v.vNormal, vNormal );
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#if !defined( SHADER_MODEL_VS_3_0 ) || !MORPHING
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ApplyMorph( v.vPosFlex, v.vNormalFlex, vPosition.xyz, vNormal );
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#else
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ApplyMorph( morphSampler, cMorphTargetTextureDim, cMorphSubrect, v.vVertexID, float3( 0, 0, 0 ), vPosition.xyz, vNormal );
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#endif
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// Normalize the flexed normal
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vNormal.xyz = normalize( vNormal.xyz );
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// Transform the position
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float3 worldPos, worldNormal;
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SkinPositionAndNormal( g_bSkinning, vPosition, vNormal, v.vBoneWeights, v.vBoneIndices, worldPos, worldNormal );
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#if INTRO
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float3 dummy = float3( 0.0f, 0.0f, 0.0f );
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WorldSpaceVertexProcess( g_Time, modelOrigin, worldPos, worldNormal, dummy, dummy );
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#endif
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// Transform into projection space
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o.projPos = mul( float4( worldPos, 1 ), cViewProj );
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o.worldPos = worldPos.xyz;
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o.vProjPos = o.projPos;
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#if !defined( _X360 )
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// Set fixed-function fog factor
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o.fog = CalcFog( worldPos, o.projPos, g_FogType );
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#endif
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// Spotlight texture coordinates
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o.spotTexCoord.x = dot( cSpotlightProj1, float4(worldPos, 1) );
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o.spotTexCoord.y = dot( cSpotlightProj2, float4(worldPos, 1) );
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o.spotTexCoord.z = dot( cSpotlightProj3, float4(worldPos, 1) );
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o.spotTexCoord.w = dot( cSpotlightProj4, float4(worldPos, 1) );
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// Compute vector to light
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float3 vWorldPosToLightVector = cFlashlightPosition.xyz - worldPos;
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float3 vDistAtten = float3(1, 1, 1);
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vDistAtten.z = dot( vWorldPosToLightVector, vWorldPosToLightVector );
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vDistAtten.y = rsqrt( vDistAtten.z );
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float flDist = vDistAtten.z * vDistAtten.y; // Distance to light
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vDistAtten.z = 1.0f / vDistAtten.z; // 1 / distsquared
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float fFarZ = cFlashlighAtten.w;
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float NdotL = saturate( dot( worldNormal, normalize( vWorldPosToLightVector ) ) );
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float endFalloffFactor = RemapValClamped_01( flDist, fFarZ, 0.6 * fFarZ );
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o.vertAtten.xyz = endFalloffFactor * dot( vDistAtten, cFlashlighAtten.xyz );
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// Final attenuation from flashlight only...
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float linearAtten = NdotL * dot( vDistAtten, cFlashlighAtten.xyz ) * endFalloffFactor;
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// Forward vector
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float3 vForward = cTeethLighting.xyz;
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float fIllumFactor = cTeethLighting.w;
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// Modulate flashlight by mouth darkening
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o.vertAtten = linearAtten * fIllumFactor * saturate( dot( worldNormal, vForward ) );
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o.baseTexCoord = v.vTexCoord0;
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return o;
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}
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