Add letter grid gimmick

1 files changed, 10 insertions, 0 deletions

diff --git a/math.cginc b/math.cginc
index 8938940..fd5dda0 100644
--- a/math.cginc
+++ b/math.cginc
@@ -113,5 +113,15 @@ float fbm(float3 p, const int n_octaves, float w)
   return res;
 }
 
+float median(float x, float y, float z)
+{
+  return max(min(x, y), min(max(x, y), z));
+}
+
+float median(float3 x)
+{
+  return median(x.x, x.y, x.z);
+}
+
 #endif  // __MATH_INC