add geometry shader

1 files changed, 1 insertions, 0 deletions

diff --git a/math.cginc b/math.cginc
index af71fc6..4cfed67 100644
--- a/math.cginc
+++ b/math.cginc
@@ -4,6 +4,7 @@
 #define PI 3.14159265358979f
 #define RCP_PI (1.0f / PI)
 #define TAU (2.0f * PI)
+#define SQRT_3 1.73205081f
 
 float sin_noise_3d(float3 uvw) {
   return sin(uvw[0]) * sin(uvw[1]) * sin(uvw[2]);