Add detail maps

1 files changed, 10 insertions, 0 deletions

diff --git a/math.cginc b/math.cginc
index 85fe4ea..436cc56 100644
--- a/math.cginc
+++ b/math.cginc
@@ -184,6 +184,16 @@ float4 alphaBlend(float4 behind, float4 front) {
   return float4(front.rgb * front.a + behind.rgb * (1 - front.a), front.a + behind.a * (1 - front.a));

 }

 

+// Reoriented normal mapping

+// https://blog.selfshadow.com/publications/blending-in-detail/

+// Inputs are in tangent space.

+float3 blendNormalsHill12(float3 n0, float3 n1) {

+  n0.z += 1.0;

+  n1.xy = -n1.xy;

+  

+  return normalize(n0 * dot(n0, n1) - n1 * n0.z);

+}

+

 #endif  // __MATH_INC