Added UTSAPI

Runtime/Shaders/Includes/Common/UtsHead.hlsl

@@ -74,6 +74,22 @@ struct UtsBSDFData
     real roughnessB;
 };
 
+bool IsNonZeroBSDF(float3 L, float3 normalWS)
+{
+#if _MATERIAL_TYPE_FACE || _USE_SHADING_RAMP_MAP_ON
+    return true;
+#else
+    float NdotL = dot(normalWS, L);
+
+    return NdotL > 0.0;
+#endif
+}
+
+bool IsNonZeroBSDF(float3 L, UtsBSDFData bsdfData)
+{
+    return IsNonZeroBSDF(L, bsdfData.normalWS);
+}
+
 UTSSurfaceData ConvertSurfaceDataToUTSSurfaceData(SurfaceData surfaceData)
 {
     UTSSurfaceData output;