143 lines
4.8 KiB
HLSL
143 lines
4.8 KiB
HLSL
#ifndef XPBR_LIT_BASE
|
||
#define XPBR_LIT_BASE
|
||
|
||
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
|
||
#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/CommonMaterial.hlsl"
|
||
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/SurfaceInput.hlsl"
|
||
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"
|
||
|
||
CBUFFER_START(UnityPerMaterial)
|
||
float4 _MainTex_ST;
|
||
half4 _BaseColor;
|
||
half _Cutoff;
|
||
half _Metallic;
|
||
half _Roughness;
|
||
half _AO;
|
||
CBUFFER_END
|
||
half _XRuntimeAmbientEnabled;
|
||
half4 _XRuntimeAmbientSky;
|
||
half4 _XRuntimeAmbientEquator;
|
||
half4 _XRuntimeAmbientGround;
|
||
TEXTURE2D(_MainTex); SAMPLER(sampler_MainTex);
|
||
TEXTURE2D(_MixTex); SAMPLER(sampler_MixTex);
|
||
|
||
|
||
struct Attributes
|
||
{
|
||
float4 positionOS : POSITION;
|
||
float3 normalOS : NORMAL;
|
||
float4 tangentOS : TANGENT;
|
||
float2 texcoord : TEXCOORD0;
|
||
float2 staticLightmapUV : TEXCOORD1;
|
||
#ifdef DYNAMICLIGHTMAP_ON
|
||
float2 dynamicLightmapUV : TEXCOORD2;
|
||
#endif
|
||
UNITY_VERTEX_INPUT_INSTANCE_ID
|
||
};
|
||
|
||
struct Varyings
|
||
{
|
||
float2 uv : TEXCOORD0;
|
||
DECLARE_LIGHTMAP_OR_SH(staticLightmapUV, vertexSH, 1);
|
||
|
||
float3 positionWS : TEXCOORD2;
|
||
|
||
half4 normalWS : TEXCOORD3; // xyz: normal, w: viewDir.x
|
||
half4 tangentWS : TEXCOORD4; // xyz: tangent, w: viewDir.y
|
||
half4 bitangentWS : TEXCOORD5; // xyz: bitangent, w: viewDir.z
|
||
|
||
#ifdef _ADDITIONAL_LIGHTS_VERTEX
|
||
half4 fogFactorAndVertexLight : TEXCOORD6; // x: fogFactor, yzw: vertex light
|
||
#else
|
||
half fogFactor : TEXCOORD6;
|
||
#endif
|
||
|
||
#ifdef DYNAMICLIGHTMAP_ON
|
||
float2 dynamicLightmapUV : TEXCOORD7;
|
||
#endif
|
||
|
||
float4 positionCS : SV_POSITION;
|
||
#if defined(REQUIRES_VERTEX_SHADOW_COORD_INTERPOLATOR)
|
||
float4 shadowCoord : TEXCOORD8;
|
||
#endif
|
||
|
||
UNITY_VERTEX_INPUT_INSTANCE_ID
|
||
UNITY_VERTEX_OUTPUT_STEREO
|
||
};
|
||
|
||
//解码 RG 两通道球面映射压缩法线（有符号，ModelTranslator 工具编码：enc = n.xy/sqrt(2*(1+n.z)) * 0.5 + 0.5）
|
||
float3 DecodeSphereMap(float2 encoded)
|
||
{
|
||
encoded = encoded * 2.0 - 1.0; //rg 无符号存储，重映射回有符号
|
||
float4 nn = float4(encoded, 1, -1);
|
||
float l = dot(nn.xyz, -nn.xyw);
|
||
nn.z = l;
|
||
nn.xy *= sqrt(l);
|
||
return nn.xyz * 2 + float3(0, 0, -1);
|
||
}
|
||
|
||
half3 SampleXRuntimeAmbient(half3 normalWS)
|
||
{
|
||
half y = normalize(normalWS).y;
|
||
half useGlobal = step(0.5h, _XRuntimeAmbientEnabled);
|
||
half3 sky = lerp(half3(1.353h, 1.452h, 1.568h), _XRuntimeAmbientSky.rgb, useGlobal);
|
||
half3 equator = lerp(half3(1.023h, 1.122h, 1.254h), _XRuntimeAmbientEquator.rgb, useGlobal);
|
||
half3 ground = lerp(half3(0.561h, 0.528h, 0.462h), _XRuntimeAmbientGround.rgb, useGlobal);
|
||
half3 upper = lerp(equator, sky, saturate(y));
|
||
half3 lower = lerp(equator, ground, saturate(-y));
|
||
return lerp(lower, upper, step(0.0h, y));
|
||
}
|
||
|
||
void InitializeInputData(Varyings input, half3 normalTS, out InputData inputData)
|
||
{
|
||
inputData = (InputData)0;
|
||
|
||
inputData.positionWS = input.positionWS;
|
||
|
||
half3 viewDirWS = GetWorldSpaceNormalizeViewDir(input.positionWS);
|
||
// 法线已在 frag 中经 TBN 转换到世界空间后写回 input.normalWS
|
||
inputData.normalWS = input.normalWS.xyz;
|
||
|
||
inputData.normalWS = NormalizeNormalPerPixel(inputData.normalWS);
|
||
inputData.viewDirectionWS = viewDirWS;
|
||
|
||
#if defined(REQUIRES_VERTEX_SHADOW_COORD_INTERPOLATOR)
|
||
inputData.shadowCoord = input.shadowCoord;
|
||
#elif defined(MAIN_LIGHT_CALCULATE_SHADOWS)
|
||
inputData.shadowCoord = TransformWorldToShadowCoord(inputData.positionWS);
|
||
#else
|
||
inputData.shadowCoord = float4(0, 0, 0, 0);
|
||
#endif
|
||
#ifdef _ADDITIONAL_LIGHTS_VERTEX
|
||
inputData.fogCoord = InitializeInputDataFog(float4(input.positionWS, 1.0), input.fogFactorAndVertexLight.x);
|
||
inputData.vertexLighting = input.fogFactorAndVertexLight.yzw;
|
||
#else
|
||
inputData.fogCoord = InitializeInputDataFog(float4(input.positionWS, 1.0), input.fogFactor);
|
||
#endif
|
||
|
||
#if defined(DYNAMICLIGHTMAP_ON)
|
||
inputData.bakedGI = SAMPLE_GI(input.staticLightmapUV, input.dynamicLightmapUV, input.vertexSH, inputData.normalWS);
|
||
#elif defined(LIGHTMAP_ON)
|
||
inputData.bakedGI = SAMPLE_GI(input.staticLightmapUV, input.vertexSH, inputData.normalWS);
|
||
#else
|
||
inputData.bakedGI = SampleSH(inputData.normalWS);
|
||
#endif
|
||
inputData.bakedGI = SampleXRuntimeAmbient(inputData.normalWS);
|
||
|
||
inputData.normalizedScreenSpaceUV = GetNormalizedScreenSpaceUV(input.positionCS);
|
||
inputData.shadowMask = SAMPLE_SHADOWMASK(input.staticLightmapUV);
|
||
|
||
#if defined(DEBUG_DISPLAY)
|
||
#if defined(DYNAMICLIGHTMAP_ON)
|
||
inputData.dynamicLightmapUV = input.dynamicLightmapUV;
|
||
#endif
|
||
#if defined(LIGHTMAP_ON)
|
||
inputData.staticLightmapUV = input.staticLightmapUV;
|
||
#else
|
||
inputData.vertexSH = input.vertexSH;
|
||
#endif
|
||
#endif
|
||
}
|
||
|
||
#endif
|