91 lines
2.8 KiB
Plaintext
91 lines
2.8 KiB
Plaintext
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Shader "Hidden/GPUInstancer/Billboard/NormalBake"
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{
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Properties
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{
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_MainTex ("Texture", 2D) = "white" {}
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_BumpMap ("Normal Map", 2D) = "bump" {}
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_Cutoff("Cutoff" , Range(0,1)) = 0.3
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_GPUIBillboardCutoffOverride("Cutoff Override", Range(0, 1)) = 0.0
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_IsLinearSpace("Add Gama Correction", Float) = 0.0
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}
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SubShader
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{
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Cull Off
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Pass
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{
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#include "UnityCG.cginc"
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#include "UnityStandardUtils.cginc"
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#include "../Include/GPUIBillboardInclude.cginc"
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sampler2D _BumpMap;
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sampler2D _MainTex;
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float4 _BumpMap_ST;
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float _Cutoff;
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float _GPUIBillboardCutoffOverride;
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float _IsLinearSpace;
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struct v2f
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{
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float2 uv : TEXCOORD0;
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float4 vertex : SV_POSITION;
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float depth : TEXCOORD4;
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//float3 normal : NORMAL;
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float4 tangentToWorldX : TEXCOORD1;
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float4 tangentToWorldY : TEXCOORD2;
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float4 tangentToWorldZ : TEXCOORD3;
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};
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v2f vert (float4 uv : TEXCOORD0, float4 vertex : POSITION, float3 normal : NORMAL, float4 tangent : TANGENT)
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{
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v2f o;
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o.vertex = UnityObjectToClipPos(vertex);
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o.uv = uv;
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float3 worldPos = mul(unity_ObjectToWorld,vertex);
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float3 worldNormal = UnityObjectToWorldNormal(normal);
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float3 worldTangent = UnityObjectToWorldDir(tangent.xyz);
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float3 worldBinormal = cross(worldNormal, worldTangent) * tangent.w;
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o.tangentToWorldX = float4(worldTangent.x, worldBinormal.x, worldNormal.x, worldPos.x);
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o.tangentToWorldY = float4(worldTangent.y, worldBinormal.y, worldNormal.y, worldPos.y);
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o.tangentToWorldZ = float4(worldTangent.z, worldBinormal.z, worldNormal.z, worldPos.z);
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o.depth = -(UnityObjectToViewPos( vertex ).z * _ProjectionParams.w);
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return o;
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}
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float4 frag (v2f i) : SV_Target
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{
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if (_GPUIBillboardCutoffOverride > 0.0){
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_Cutoff = _GPUIBillboardCutoffOverride;
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}
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float3 textureNormal = UnpackNormal(tex2D(_BumpMap, TRANSFORM_TEX(i.uv, _BumpMap)));
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float4 col = tex2D(_MainTex, i.uv);
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clip (col.a - _Cutoff);
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float3 worldPos = float3(i.tangentToWorldX.w, i.tangentToWorldY.w, i.tangentToWorldZ.w);
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float3 worldNormal = normalize(float3(dot(i.tangentToWorldX.xyz, textureNormal), dot(i.tangentToWorldY.xyz, textureNormal), dot(i.tangentToWorldZ.xyz, textureNormal)));
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#if UNITY_REVERSED_Z
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i.depth = 1-i.depth;
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#endif
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// remap normals to [0, 1] (a is depth atlas) and account fot gamma correction if necessary
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return float4((worldNormal.rgb * 0.5 + 0.5), i.depth) * (1 - _IsLinearSpace) + (_IsLinearSpace * float4(LinearToGamma(worldNormal.rgb * 0.5 + 0.5), LinearToGammaExact(i.depth)));
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}
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ENDCG
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}
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}
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}
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