30 lines
788 B
HLSL
30 lines
788 B
HLSL
#ifndef CUSTOM_TEXTURE_GTRAPH
|
|
#define CUSTOM_TEXTURE_GTRAPH
|
|
|
|
float4 SRGBToLinear( float4 c ) { return c; }
|
|
float3 SRGBToLinear( float3 c ) { return c; }
|
|
|
|
// Unpack normal as DXT5nm (1, y, 1, x) or BC5 (x, y, 0, 1)
|
|
// Note neutral texture like "bump" is (0, 0, 1, 1) to work with both plain RGB normal and DXT5nm/BC5
|
|
float3 UnpackNormalmapRGorAG(float4 packednormal)
|
|
{
|
|
// This do the trick
|
|
packednormal.x *= packednormal.w;
|
|
|
|
float3 normal;
|
|
normal.xy = packednormal.xy * 2 - 1;
|
|
normal.z = sqrt(1 - saturate(dot(normal.xy, normal.xy)));
|
|
return normal;
|
|
}
|
|
|
|
inline float3 UnpackNormal(float4 packednormal)
|
|
{
|
|
#if defined(UNITY_NO_DXT5nm)
|
|
return packednormal.xyz * 2 - 1;
|
|
#else
|
|
return UnpackNormalmapRGorAG(packednormal);
|
|
#endif
|
|
}
|
|
|
|
#endif // CUSTOM_TEXTURE_GTRAPH
|