70 lines
1.7 KiB
HLSL
70 lines
1.7 KiB
HLSL
#ifndef BAKERY_META
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#define BAKERY_META
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Texture2D bestFitNormalMap;
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float _IsFlipped;
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struct BakeryMetaInput
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{
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float2 uv0 : TEXCOORD0;
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float2 uv1 : TEXCOORD1;
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float3 normal : NORMAL;
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#ifndef _TERRAIN_NORMAL_MAP
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float4 tangent : TANGENT;
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#endif
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};
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struct v2f_bakeryMeta
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{
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float4 pos : SV_POSITION;
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float2 uv : TEXCOORD0;
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float3 normal : TEXCOORD1;
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float3 tangent : TEXCOORD2;
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float3 binormal : TEXCOORD3;
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};
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v2f_bakeryMeta vert_bakerymt (BakeryMetaInput v)
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{
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v2f_bakeryMeta o;
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o.pos = float4(((v.uv1.xy * unity_LightmapST.xy + unity_LightmapST.zw)*2-1) * float2(1,-1), 0.5, 1);
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o.uv = v.uv0;
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o.normal = normalize(mul((float3x3)unity_ObjectToWorld, v.normal).xyz);
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#ifdef _TERRAIN_NORMAL_MAP
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o.tangent = cross(o.normal, float3(0,0,1));
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o.binormal = cross(o.normal, o.tangent) * -1;
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#else
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o.tangent = normalize(mul((float3x3)unity_ObjectToWorld, v.tangent.xyz).xyz);
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o.binormal = cross(o.normal, o.tangent) * v.tangent.w * _IsFlipped;
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#endif
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return o;
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}
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float3 EncodeNormalBestFit(float3 n)
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{
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float3 nU = abs(n);
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float maxNAbs = max(nU.z, max(nU.x, nU.y));
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float2 TC = nU.z<maxNAbs? (nU.y<maxNAbs? nU.yz : nU.xz) : nU.xy;
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//if (TC.x != TC.y)
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//{
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TC = TC.x<TC.y? TC.yx : TC.xy;
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TC.y /= TC.x;
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n /= maxNAbs;
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float fittingScale = bestFitNormalMap.Load(int3(TC.x*1023, TC.y*1023, 0)).a;
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n *= fittingScale;
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//}
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return n*0.5+0.5;
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}
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float3 TransformNormalMapToWorld(v2f_bakeryMeta i, float3 tangentNormalMap)
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{
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float3x3 TBN = float3x3(normalize(i.tangent), normalize(i.binormal), normalize(i.normal));
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return mul(tangentNormalMap, TBN);
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}
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#define BakeryEncodeNormal EncodeNormalBestFit
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#endif
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