Update noise examples

Author: monkstone

processing_app/basics/math/noise4_tap.rb

@@ -17,7 +17,6 @@ def setup
     background(0)
     stroke(255)
     fill(32, 255, 64)
-    noise_mode(Propane::SIMPLEX)
     @half_w = width * 0.5
     @half_h = height * 0.5
     @radius = height * 0.4

processing_app/basics/math/noise_image.rb

@@ -0,0 +1,30 @@
+require 'propane'
+# OpenSimplex has a range -1.0 to 1.0
+class NoiseImage < Propane::App
+  SCALE = 0.02
+
+  def setup
+    sketch_title 'Noise Image'
+    background(0)
+    stroke(255)
+    no_fill
+  end
+
+  def draw
+    background(0)
+    scale = 0.02
+    load_pixels
+    grid(500, 500) do |x, y|
+      col = noise(SCALE * x, SCALE * y) > 0 ? 255 : 0
+      pixels[x + width * y] = color(col, 0, 0)
+    end
+    update_pixels
+    save(data_path('noise_image.png'))
+  end
+
+  def settings
+    size 500, 500
+  end
+end
+
+NoiseImage.new