New permutation (much improved randomness)

stegu · web-flow · commit f11d7dee213e · 2021-06-29T11:03:51.000+02:00
diff --git a/src/psrdnoise2D.glsl b/src/psrdnoise2D.glsl
@@ -74,7 +74,7 @@ vec3 mod289(vec3 x) {
 
 // Permutation polynomial (ring size 289 = 17*17)
 vec3 permute(vec3 x) {
-  return mod289(((x*34.0)+1.0)*x);
+  return mod289(((x*34.0)+6.0)*x);
 }
 
 // Hashed 2-D gradients with an extra rotation.

Original file line number	Diff line number	Diff line change
`@@ -74,7 +74,7 @@ vec3 mod289(vec3 x) {`
`74`	`74`
`75`	`75`	`// Permutation polynomial (ring size 289 = 17*17)`
`76`	`76`	`vec3 permute(vec3 x) {`
`77`		`- return mod289(((x34.0)+1.0)x);`
	`77`	`+ return mod289(((x34.0)+6.0)x);`
`78`	`78`	`}`
`79`	`79`
`80`	`80`	`// Hashed 2-D gradients with an extra rotation.`