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//====== Copyright � 1996-2005, Valve Corporation, All rights reserved. =======
//
// Purpose:
//
//=============================================================================
// STATIC: "MODEL" "0..1"
// STATIC: "COLORMODULATE" "0..1"
// DYNAMIC: "COMPRESSED_VERTS" "0..1"
// DYNAMIC: "SKINNING" "0..1"
#include "common_vs_fxc.h"
static const bool g_bSkinning = SKINNING ? true : false;
static const bool g_bModel = MODEL ? true : false;
const float4 cBumpTexCoordTransform[4] : register( SHADER_SPECIFIC_CONST_1 );
const float g_flTime : register( SHADER_SPECIFIC_CONST_5 );
struct VS_INPUT
{
float4 vPos : POSITION;
float4 vBoneWeights : BLENDWEIGHT;
float4 vBoneIndices : BLENDINDICES;
float4 vNormal : NORMAL;
float4 vBaseTexCoord : TEXCOORD0;
#if !MODEL
float3 vTangentS : TANGENT;
float3 vTangentT : BINORMAL0;
#else
float4 vUserData : TANGENT;
#endif
#if COLORMODULATE
float4 vColor : COLOR0;
#endif
};
struct VS_OUTPUT
{
float4 vProjPos_POSITION : POSITION;
#if !defined( _X360 )
float vFog : FOG;
#endif
float4 vBumpTexCoord : TEXCOORD0;
float3 vTangentEyeVect : TEXCOORD1;
float3 vWorldNormal : TEXCOORD2;
float3 vWorldTangent : TEXCOORD3;
float3 vWorldBinormal : TEXCOORD4;
float3 vRefractXYW : TEXCOORD5;
float3 vWorldViewVector : TEXCOORD6;
#if COLORMODULATE
float4 vColor : COLOR0;
#endif
float4 fogFactorW : COLOR1;
float4 worldPos_projPosZ : TEXCOORD7; // Necessary for pixel fog
};
VS_OUTPUT main( const VS_INPUT v )
{
VS_OUTPUT o = ( VS_OUTPUT )0;
#if COLORMODULATE
o.vColor = v.vColor;
#endif
float3 worldNormal, worldPos, worldTangentS, worldTangentT;
float3 vObjNormal;
#if MODEL
float4 vObjTangent;
DecompressVertex_NormalTangent( v.vNormal, v.vUserData, vObjNormal, vObjTangent );
SkinPositionNormalAndTangentSpace(
g_bSkinning,
v.vPos, vObjNormal, vObjTangent,
v.vBoneWeights, v.vBoneIndices,
worldPos, worldNormal, worldTangentS, worldTangentT );
#else
DecompressVertex_Normal( v.vNormal, vObjNormal );
worldPos = mul( v.vPos, cModel[0] );
worldTangentS = mul( v.vTangentS, ( const float3x3 )cModel[0] );
worldTangentT = mul( v.vTangentT, ( const float3x3 )cModel[0] );
worldNormal = mul( vObjNormal, ( float3x3 )cModel[0] );
#endif
// World normal
o.vWorldNormal.xyz = normalize( worldNormal.xyz );
// Projected position
float4 vProjPos = mul( float4( worldPos, 1 ), cViewProj );
o.vProjPos_POSITION = vProjPos;
vProjPos.z = dot( float4( worldPos, 1 ), cViewProjZ );
o.worldPos_projPosZ = float4( worldPos.xyz, vProjPos.z );
//o.projNormal.xyz = mul( worldNormal, cViewProj );
// Map projected position to the refraction texture
float2 vRefractPos;
vRefractPos.x = vProjPos.x;
vRefractPos.y = -vProjPos.y; // invert Y
vRefractPos = (vRefractPos + vProjPos.w) * 0.5f;
// Refraction transform
o.vRefractXYW = float3(vRefractPos.x, vRefractPos.y, vProjPos.w);
// Compute fog based on the position
float3 vWorldPos = mul( v.vPos, cModel[0] );
o.fogFactorW = CalcFog( vWorldPos, vProjPos, FOGTYPE_RANGE );
#if !defined( _X360 )
o.vFog = o.fogFactorW;
#endif
// Eye vector
float3 vWorldEyeVect = normalize( cEyePos - vWorldPos );
o.vWorldViewVector.xyz = -vWorldEyeVect.xyz;
// Transform to the tangent space
o.vTangentEyeVect.x = dot( vWorldEyeVect, worldTangentS );
o.vTangentEyeVect.y = dot( vWorldEyeVect, worldTangentT );
o.vTangentEyeVect.z = dot( vWorldEyeVect, worldNormal );
// Tranform bump coordinates
o.vBumpTexCoord.x = dot( v.vBaseTexCoord, cBumpTexCoordTransform[0] );
o.vBumpTexCoord.y = dot( v.vBaseTexCoord, cBumpTexCoordTransform[1] );
// Tranform bump coordinates (note wz, not zw)
o.vBumpTexCoord.w = dot( v.vBaseTexCoord, cBumpTexCoordTransform[2] );
o.vBumpTexCoord.z = dot( v.vBaseTexCoord, cBumpTexCoordTransform[3] );
// Tangent space transform
o.vWorldNormal.xyz = normalize( worldNormal.xyz );
o.vWorldTangent.xyz = worldTangentS.xyz;
o.vWorldBinormal.xyz = worldTangentT.xyz;
return o;
}
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