楚留香《一梦江湖》捏脸美术制作和渲染分析

half aspect = sqrt(1.0f – Anisotropy * 0.99f);half anisoXRoughness = max(0.01f, roughness / aspect);half anisoYRoughness = max(0.01f, roughness * aspect);half anisoXRoughness_V = max(0.01f, roughness_V / aspect);half anisoYRoughness_V = max(0.01f, roughness_V * aspect);float D_GGXaniso( float RoughnessX, float RoughnessY, float NoH, float3 H, float3 X, float3 Y ){        float ax = RoughnessX * RoughnessX;        float ay = RoughnessY * RoughnessY;        float XoH = dot( X, H );        float YoH = dot( Y, H );        float d = XoH*XoH / (ax*ax) + YoH*YoH / (ay*ay) + NoH*NoH;        return 1 / ( PI * ax*ay * d*d );}

float3 RotateAroundYInDegreesCube(float3 vertex, float degrees){    half alpha = degrees * M_PI / 180.0;    half sina, cosa;    sincos(alpha, sina, cosa);    half2x2 m1 = half2x2(cosa, -sina, sina, cosa);    half2x2 m = half2x2(unity_WorldToObject[0][0], unity_WorldToObject[0][2], unity_WorldToObject[2][0], unity_WorldToObject[2][2]);    m = mul(m1, m);    half2x2 t = half2x2(1, unity_ObjectToWorld[0][3],1, unity_ObjectToWorld[2][3]);        //m = mul(m, t);            half3 rotate = half3 (mul(m, vertex.xz), vertex.y).xzy;            return rotate;}    float3 newDir = RotateAroundYInDegreesCube(dir, rotation);    float3 cubeMapData = DecodeHDR(texCUBElod(_Cubemap, float4(newDir, lodValue)), 1);