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85 行
3.1 KiB

Shader "Hidden/HDRenderPipeline/DrawTransmittanceGraph"
{
SubShader
{
Pass
{
Cull Off
ZTest Always
ZWrite Off
Blend Off
HLSLPROGRAM
#pragma target 4.5
#pragma only_renderers d3d11 ps4 metal // TEMP: until we go further in dev
#pragma vertex Vert
#pragma fragment Frag
//-------------------------------------------------------------------------------------
// Include
//-------------------------------------------------------------------------------------
#include "../../../Core/ShaderLibrary/CommonMaterial.hlsl"
#include "../../../Core/ShaderLibrary/Common.hlsl"
#define USE_LEGACY_UNITY_MATRIX_VARIABLES
#include "../../ShaderVariables.hlsl"
//-------------------------------------------------------------------------------------
// Inputs & outputs
//-------------------------------------------------------------------------------------
uint _UseDisneySSS;
float4 _HalfRcpVarianceAndWeight1, _HalfRcpVarianceAndWeight2;
float4 _ShapeParam, _TransmissionTint, _ThicknessRemap;
//-------------------------------------------------------------------------------------
// Implementation
//-------------------------------------------------------------------------------------
struct Attributes
{
float3 vertex : POSITION;
float2 texcoord : TEXCOORD0;
};
struct Varyings
{
float4 vertex : SV_POSITION;
float2 texcoord : TEXCOORD0;
};
Varyings Vert(Attributes input)
{
Varyings output;
output.vertex = TransformWorldToHClip(input.vertex);
output.texcoord = input.texcoord.xy;
return output;
}
float4 Frag(Varyings input) : SV_Target
{
float d = (_ThicknessRemap.x + input.texcoord.x * (_ThicknessRemap.y - _ThicknessRemap.x));
float3 T;
if (_UseDisneySSS)
{
T = ComputeTransmittance(_ShapeParam.rgb, float3(0.25, 0.25, 0.25), d, 1);
}
else
{
T = ComputeTransmittanceJimenez(_HalfRcpVarianceAndWeight1.rgb,
_HalfRcpVarianceAndWeight1.a,
_HalfRcpVarianceAndWeight2.rgb,
_HalfRcpVarianceAndWeight2.a,
float3(0.25, 0.25, 0.25), d, 1);
}
// Apply gamma for visualization only. Do not apply gamma to the color.
return float4(sqrt(T) * _TransmissionTint.rgb, 1);
}
ENDHLSL
}
}
Fallback Off
}