# HG changeset patch
# User sam <sam@basx.dev>
# Date 1727455477 -25200
# Node ID 93a6d70d845f14b0383508242f0b5d97b3d92af7
# Parent  7b8a6b5e9a4648fb3663ef4cb1bfdbfa90a1b6c1
fix: make perlin noise 0..1 instead of -1..1

diff -r 7b8a6b5e9a46 -r 93a6d70d845f semicongine/contrib/algorithms/noise.nim
--- a/semicongine/contrib/algorithms/noise.nim	Wed Sep 11 23:26:08 2024 +0700
+++ b/semicongine/contrib/algorithms/noise.nim	Fri Sep 27 23:44:37 2024 +0700
@@ -27,8 +27,9 @@
     xinterpol = pos.x - topleft.x
     yinterpol = pos.y - topleft.y
 
-  return interpolate(
-    interpolate(topleft_dot, bottomleft_dot, yinterpol),
-    interpolate(topright_dot, bottomright_dot, yinterpol),
-    xinterpol,
-  )
+  return
+    interpolate(
+      interpolate(topleft_dot, bottomleft_dot, yinterpol),
+      interpolate(topright_dot, bottomright_dot, yinterpol),
+      xinterpol,
+    ) * 0.5 + 0.5