9092858a58
I updated everything to the latest Unity Editor. Also realized I had the wrong shaders on my hairs, those are fixed and the hairs look MUCH better!
47 lines
2.0 KiB
HLSL
47 lines
2.0 KiB
HLSL
#ifndef UNIVERSAL_PARALLAX_MAPPING_INCLUDED
|
|
#define UNIVERSAL_PARALLAX_MAPPING_INCLUDED
|
|
|
|
// Return view direction in tangent space, make sure tangentWS.w is already multiplied by GetOddNegativeScale()
|
|
half3 GetViewDirectionTangentSpace(half4 tangentWS, half3 normalWS, half3 viewDirWS)
|
|
{
|
|
// must use interpolated tangent, bitangent and normal before they are normalized in the pixel shader.
|
|
half3 unnormalizedNormalWS = normalWS;
|
|
const half renormFactor = 1.0 / length(unnormalizedNormalWS);
|
|
|
|
// use bitangent on the fly like in hdrp
|
|
// IMPORTANT! If we ever support Flip on double sided materials ensure bitangent and tangent are NOT flipped.
|
|
half crossSign = (tangentWS.w > 0.0 ? 1.0 : -1.0); // we do not need to multiple GetOddNegativeScale() here, as it is done in vertex shader
|
|
half3 bitang = crossSign * cross(normalWS.xyz, tangentWS.xyz);
|
|
|
|
half3 WorldSpaceNormal = renormFactor * normalWS.xyz; // we want a unit length Normal Vector node in shader graph
|
|
|
|
// to preserve mikktspace compliance we use same scale renormFactor as was used on the normal.
|
|
// This is explained in section 2.2 in "surface gradient based bump mapping framework"
|
|
half3 WorldSpaceTangent = renormFactor * tangentWS.xyz;
|
|
half3 WorldSpaceBiTangent = renormFactor * bitang;
|
|
|
|
half3x3 tangentSpaceTransform = half3x3(WorldSpaceTangent, WorldSpaceBiTangent, WorldSpaceNormal);
|
|
half3 viewDirTS = mul(tangentSpaceTransform, viewDirWS);
|
|
|
|
return viewDirTS;
|
|
}
|
|
|
|
#ifndef BUILTIN_TARGET_API
|
|
half2 ParallaxOffset1Step(half height, half amplitude, half3 viewDirTS)
|
|
{
|
|
height = height * amplitude - amplitude / 2.0;
|
|
half3 v = normalize(viewDirTS);
|
|
v.z += 0.42;
|
|
return height * (v.xy / v.z);
|
|
}
|
|
#endif
|
|
|
|
float2 ParallaxMapping(TEXTURE2D_PARAM(heightMap, sampler_heightMap), half3 viewDirTS, half scale, float2 uv)
|
|
{
|
|
half h = SAMPLE_TEXTURE2D(heightMap, sampler_heightMap, uv).g;
|
|
float2 offset = ParallaxOffset1Step(h, scale, viewDirTS);
|
|
return offset;
|
|
}
|
|
|
|
#endif // UNIVERSAL_PARALLAX_MAPPING_INCLUDED
|