75 lines
1.9 KiB
HLSL
75 lines
1.9 KiB
HLSL
#ifndef BAKERY_META
|
|
#define BAKERY_META
|
|
|
|
Texture2D bestFitNormalMap;
|
|
float _IsPerPixel;
|
|
|
|
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;
|
|
float4 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.xyz = cross(o.normal, float3(0,0,1));
|
|
o.binormal = cross(o.normal, o.tangent.xyz) * -1;
|
|
o.tangent.w = -1;
|
|
#else
|
|
o.tangent.xyz = normalize(mul((float3x3)unity_ObjectToWorld, v.tangent.xyz).xyz);
|
|
o.binormal = cross(o.normal, o.tangent.xyz) * v.tangent.w;
|
|
o.tangent.w = v.tangent.w;
|
|
#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)
|
|
{
|
|
float3 b = i.binormal;
|
|
if (_IsPerPixel > 0.0f) b = cross(i.normal, i.tangent.xyz) * i.tangent.w;
|
|
|
|
float3x3 TBN = float3x3(normalize(i.tangent.xyz), normalize(b), normalize(i.normal));
|
|
return mul(tangentNormalMap, TBN);
|
|
}
|
|
|
|
#define BakeryEncodeNormal EncodeNormalBestFit
|
|
|
|
#endif
|