From c445960cdad168be3beede984940c10fc86ff694 Mon Sep 17 00:00:00 2001
From: Stefan Gustavson <stefan.gustavson@gmail.com>
Date: Tue, 29 Jun 2021 11:04:55 +0200
Subject: [PATCH] New permutation (much improved randomness)

---
 src/cellular2x2.glsl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/cellular2x2.glsl b/src/cellular2x2.glsl
index c563e14..4651af8 100644
--- a/src/cellular2x2.glsl
+++ b/src/cellular2x2.glsl
@@ -20,9 +20,9 @@ vec4 mod7(vec4 x) {
   return x - floor(x * (1.0 / 7.0)) * 7.0;
 }
 
-// Permutation polynomial: (34x^2 + x) mod 289
+// Permutation polynomial: (34x^2 + 6x) mod 289
 vec4 permute(vec4 x) {
-  return mod289((34.0 * x + 1.0) * x);
+  return mod289((34.0 * x + 6.0) * x);
 }
 
 // Cellular noise, returning F1 and F2 in a vec2.