Merge branch 'Convert-shaderLibrary-to-half-float-support' of https://github.com/Unity-Technologies/ScriptableRenderPipeline into Convert-shaderLibrary-to-half-float-support

ScriptableRenderPipeline/Core/CoreRP/ShaderLibrary/CommonLighting.hlsl

     // For one, it does not solve the incorrect lookup direction problem, since the normal itself
     // is not modified. There is a more insidious issue, however. 'NdotV' is a constituent element
     // of the mathematical system describing the relationships between different vectors - and
-    // not just normal and view vectors, but also light vectors, real vectors, tangent vectors, etc.
+    // not just normal and view vectors, but also light vectors, half vectors, tangent vectors, etc.
     // Changing only one angle (or its cosine) leaves the system in an inconsistent state, where
     // certain relationships can take on different values depending on whether 'NdotV' is used
     // in the calculation or not. Therefore, it is important to change the normal (or another

ScriptableRenderPipeline/Core/CoreRP/ShaderLibrary/ImageBasedLighting.hlsl

     H = sqrt(u.x / (1.0 - u.x)) * (roughnessT * cos(TWO_PI * u.y) * tangentX + roughnessB * sin(TWO_PI * u.y) * tangentY) + N;
     H = normalize(H);
 
-    // Convert sample from real angle to incident angle
+    // Convert sample from half angle to incident angle
     L = 2.0 * saturate(dot(V, H)) * H - V;
 }
 
         uint x = BinarySearchRow(y, s.y, conditionalDensities, width - 1);
 
         // Compute the coordinates of the sample.
-        // Note: we take the sample in between two texels, and also apply the real-texel offset.
+        // Note: we take the sample in between two texels, and also apply the half-texel offset.
         // We could compute fractional coordinates at the cost of 4 extra texel samples.
         real  u = saturate((real)x / width  + 1.0 / width);
         real  v = saturate((real)y / height + 1.0 / height);