lib/noise: fix the expected amplitude of the pseudo random value to be in [-1.0 ...

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/lib/noise.nit b/lib/noise.nit
index 7f26401..71dfdfc 100644 (file)
--- a/lib/noise.nit
+++ b/lib/noise.nit
@@ -301,7 +301,8 @@ class InterpolatedNoise
                var ix1 = sx.lerp(n0, n1)
                var val = sy.lerp(ix0, ix1)
 
-               # Return value in [min...max] from val in [-0.5...0.5]
+               # Return value in [min...max] from val in [-1.0...1.0]
+               val /= 2.0
                val += 0.5
                return val.lerp(min, max)
        end