您最多选择25个主题
主题必须以中文或者字母或数字开头，可以包含连字符 (-)，并且长度不得超过35个字符
146 行
4.4 KiB
146 行
4.4 KiB
#ifndef LIGHTWEIGHT_PASS_LIT_INCLUDED
|
|
#define LIGHTWEIGHT_PASS_LIT_INCLUDED
|
|
|
|
#include "LWRP/ShaderLibrary/Lighting.hlsl"
|
|
|
|
struct LightweightVertexInput
|
|
{
|
|
float4 vertex : POSITION;
|
|
float3 normal : NORMAL;
|
|
float4 tangent : TANGENT;
|
|
float2 texcoord : TEXCOORD0;
|
|
float2 lightmapUV : TEXCOORD1;
|
|
UNITY_VERTEX_INPUT_INSTANCE_ID
|
|
};
|
|
|
|
struct LightweightVertexOutput
|
|
{
|
|
float2 uv : TEXCOORD0;
|
|
DECLARE_LIGHTMAP_OR_SH(lightmapUV, vertexSH, 1);
|
|
|
|
#ifdef _ADDITIONAL_LIGHTS
|
|
float3 posWS : TEXCOORD2;
|
|
#endif
|
|
|
|
#ifdef _NORMALMAP
|
|
half4 normal : TEXCOORD3; // xyz: normal, w: viewDir.x
|
|
half4 tangent : TEXCOORD4; // xyz: tangent, w: viewDir.y
|
|
half4 binormal : TEXCOORD5; // xyz: binormal, w: viewDir.z
|
|
#else
|
|
half3 normal : TEXCOORD3;
|
|
half3 viewDir : TEXCOORD4;
|
|
#endif
|
|
|
|
half4 fogFactorAndVertexLight : TEXCOORD6; // x: fogFactor, yzw: vertex light
|
|
|
|
#ifdef _SHADOWS_ENABLED
|
|
float4 shadowCoord : TEXCOORD7;
|
|
#endif
|
|
|
|
float4 clipPos : SV_POSITION;
|
|
UNITY_VERTEX_INPUT_INSTANCE_ID
|
|
UNITY_VERTEX_OUTPUT_STEREO
|
|
};
|
|
|
|
void InitializeInputData(LightweightVertexOutput IN, half3 normalTS, out InputData inputData)
|
|
{
|
|
inputData = (InputData)0;
|
|
|
|
#ifdef _ADDITIONAL_LIGHTS
|
|
inputData.positionWS = IN.posWS;
|
|
#endif
|
|
|
|
#ifdef _NORMALMAP
|
|
half3 viewDir = half3(IN.normal.w, IN.tangent.w, IN.binormal.w);
|
|
inputData.normalWS = TangentToWorldNormal(normalTS, IN.tangent.xyz, IN.binormal.xyz, IN.normal.xyz);
|
|
#else
|
|
half3 viewDir = IN.viewDir;
|
|
inputData.normalWS = FragmentNormalWS(IN.normal);
|
|
#endif
|
|
|
|
inputData.viewDirectionWS = FragmentViewDirWS(viewDir);
|
|
#ifdef _SHADOWS_ENABLED
|
|
inputData.shadowCoord = IN.shadowCoord;
|
|
#else
|
|
inputData.shadowCoord = float4(0, 0, 0, 0);
|
|
#endif
|
|
inputData.fogCoord = IN.fogFactorAndVertexLight.x;
|
|
inputData.vertexLighting = IN.fogFactorAndVertexLight.yzw;
|
|
inputData.bakedGI = SAMPLE_GI(IN.lightmapUV, IN.vertexSH, inputData.normalWS);
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// Vertex and Fragment functions //
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Used in Standard (Physically Based) shader
|
|
LightweightVertexOutput LitPassVertex(LightweightVertexInput v)
|
|
{
|
|
LightweightVertexOutput o = (LightweightVertexOutput)0;
|
|
|
|
UNITY_SETUP_INSTANCE_ID(v);
|
|
UNITY_TRANSFER_INSTANCE_ID(v, o);
|
|
UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
|
|
|
|
o.uv = TRANSFORM_TEX(v.texcoord, _MainTex);
|
|
|
|
float3 posWS = TransformObjectToWorld(v.vertex.xyz);
|
|
o.clipPos = TransformWorldToHClip(posWS);
|
|
|
|
half3 viewDir = VertexViewDirWS(GetCameraPositionWS() - posWS);
|
|
|
|
#ifdef _NORMALMAP
|
|
o.normal.w = viewDir.x;
|
|
o.tangent.w = viewDir.y;
|
|
o.binormal.w = viewDir.z;
|
|
#else
|
|
o.viewDir = viewDir;
|
|
#endif
|
|
|
|
// initializes o.normal and if _NORMALMAP also o.tangent and o.binormal
|
|
OUTPUT_NORMAL(v, o);
|
|
|
|
// We either sample GI from lightmap or SH.
|
|
// Lightmap UV and vertex SH coefficients use the same interpolator ("float2 lightmapUV" for lightmap or "half3 vertexSH" for SH)
|
|
// see DECLARE_LIGHTMAP_OR_SH macro.
|
|
// The following funcions initialize the correct variable with correct data
|
|
OUTPUT_LIGHTMAP_UV(v.lightmapUV, unity_LightmapST, o.lightmapUV);
|
|
OUTPUT_SH(o.normal.xyz, o.vertexSH);
|
|
|
|
half3 vertexLight = VertexLighting(posWS, o.normal.xyz);
|
|
half fogFactor = ComputeFogFactor(o.clipPos.z);
|
|
o.fogFactorAndVertexLight = half4(fogFactor, vertexLight);
|
|
|
|
#ifdef _SHADOWS_ENABLED
|
|
#if SHADOWS_SCREEN
|
|
o.shadowCoord = ComputeShadowCoord(o.clipPos);
|
|
#else
|
|
o.shadowCoord = TransformWorldToShadowCoord(posWS);
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef _ADDITIONAL_LIGHTS
|
|
o.posWS = posWS;
|
|
#endif
|
|
|
|
return o;
|
|
}
|
|
|
|
// Used in Standard (Physically Based) shader
|
|
half4 LitPassFragment(LightweightVertexOutput IN) : SV_Target
|
|
{
|
|
UNITY_SETUP_INSTANCE_ID(IN);
|
|
|
|
SurfaceData surfaceData;
|
|
InitializeStandardLitSurfaceData(IN.uv, surfaceData);
|
|
|
|
InputData inputData;
|
|
InitializeInputData(IN, surfaceData.normalTS, inputData);
|
|
|
|
half4 color = LightweightFragmentPBR(inputData, surfaceData.albedo, surfaceData.metallic, surfaceData.specular, surfaceData.smoothness, surfaceData.occlusion, surfaceData.emission, surfaceData.alpha);
|
|
|
|
ApplyFog(color.rgb, inputData.fogCoord);
|
|
return color;
|
|
}
|
|
|
|
#endif
|