added a rudimentary pixel sort example

Author: m9dfukc

sketches/pixel_sort/data/moonwalk.jpg

@@ -0,0 +1,62 @@
+import java.util.Random;
+
+PImage img;
+int y;
+int p; 
+
+void setup() {
+  size(640, 360);
+  frameRate(120);
+  img = loadImage("moonwalk.jpg");
+  y = 0;
+  p = 1;
+}
+
+void draw() {
+  background(255);
+  PImage buf = createImage(img.width, img.height, RGB);
+  buf = img.copy();
+  
+  for (int x=0; x < img.width; x += p) { 
+    for (int y=0; y < img.height; y++) {
+      color[] colors = new color[p];
+      for (int i=0; i < p; i++) {
+        int index = x+i;
+        colors[i] = img.get(index, y);
+        if (index >= img.width - 1) {
+          break;
+        }
+      }
+      
+      shuffleColors(colors);
+      
+      for (int i=0; i < p; i++) {
+        int index = x+i;
+        color c = colors[i];
+        buf.set(index, y, c);
+        if (index >= img.width - 1) {
+          break;
+        }
+      }
+    }
+  }
+  
+  img = buf;
+  image(img, 0, 0);
+  p++;
+}
+
+void shuffleColors(color[] array) {
+    int index;
+    Random random = new Random();
+    for (int i = array.length - 1; i > 0; i--)
+    {
+        index = random.nextInt(i + 1);
+        if (index != i)
+        {
+            array[index] ^= array[i];
+            array[i] ^= array[index];
+            array[index] ^= array[i];
+        }
+    }
+}