Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

54 lines
2.1 KiB

// DYNAMIC: "PIXELFOGTYPE" "0..1"
// DYNAMIC: "WRITE_DEPTH_TO_DESTALPHA" "0..1" [ps20b] [PC]
// DYNAMIC: "WRITE_DEPTH_TO_DESTALPHA" "0..0" [ps20b] [XBOX]
// STATIC: "CONVERT_TO_SRGB" "0..1" [ps20b][= g_pHardwareConfig->NeedsShaderSRGBConversion()] [PC]
// STATIC: "CONVERT_TO_SRGB" "0..0" [= 0] [XBOX]
#if defined( SHADER_MODEL_PS_2_0 )
# define WRITE_DEPTH_TO_DESTALPHA 0
#endif
#include "common_ps_fxc.h"
#include "shader_constant_register_map.h"
sampler NormalSampler : register( s0 );
sampler BaseTextureSampler : register( s1 );
const float4 g_FogParams : register( PSREG_FOG_PARAMS );
const float4 g_EyePos_SpecExponent : register( PSREG_EYEPOS_SPEC_EXPONENT );
struct PS_INPUT
{
float2 vTexCoord0 : TEXCOORD0;
float2 vTexCoord1 : TEXCOORD1;
float4 worldPos_projPosZ : TEXCOORD7; // Necessary for pixel fog
float4 directionalLightColor : COLOR0;
float4 fogFactorW : COLOR1;
};
float4 main( PS_INPUT i ) : COLOR
{
float3 vNormalMapDir = tex2D( NormalSampler, i.vTexCoord0 ); // Get the 3-vector from the normal map
float4 textureColor = tex2D( BaseTextureSampler, i.vTexCoord1 ); // Interpret tcoord t1 as color data.
//Expand compacted vectors
//TODO: find if there's a better way to expand a color normal to a full vector ( _bx2 was used in the assembly code )
vNormalMapDir = (vNormalMapDir - 0.5) * 2.0;
float3 vLightDir = float3( 0.0f, 0.0f, 1.0f );
float lightDirDotNormalMap = dot( vNormalMapDir, vLightDir ); //normalMap dot dirLightDir
// do half-lambert on the dot
lightDirDotNormalMap = lightDirDotNormalMap * 0.5 + 0.5;
lightDirDotNormalMap = lightDirDotNormalMap * lightDirDotNormalMap;
float4 resultColor;
resultColor.xyz = lightDirDotNormalMap * ( textureColor.rgb * i.directionalLightColor.rgb );
resultColor.a = textureColor.a * i.directionalLightColor.a;
float fogFactor = CalcPixelFogFactor( PIXELFOGTYPE, g_FogParams, g_EyePos_SpecExponent.z, i.worldPos_projPosZ.z, i.worldPos_projPosZ.w );
return FinalOutput( resultColor, fogFactor, PIXELFOGTYPE, TONEMAP_SCALE_LINEAR, (WRITE_DEPTH_TO_DESTALPHA != 0), i.worldPos_projPosZ.w );
}