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