@@ -0,0 +1,49 @@
+/**
+ * Extrusion. 
+ * 
+ * Converts a flat image into spatial data points and rotates the points
+ * around the center.
+ */
+
+PImage a;
+boolean onetime = true;
+int[][] aPixels;
+int[][] values;
+float angle;
+
+void setup() {
+  size(640, 360, P3D);
+  
+  aPixels = new int[width][height];
+  values = new int[width][height];
+  noFill();
+
+  // Load the image into a new array
+  // Extract the values and store in an array
+  a = loadImage("ystone08.jpg");
+  a.loadPixels();
+  for (int i = 0; i < a.height; i++) {
+    for (int j = 0; j < a.width; j++) {
+      aPixels[j][i] = a.pixels[i*a.width + j];
+      values[j][i] = int(blue(aPixels[j][i]));
+    }
+  }
+}
+
+void draw() {
+  background(0);
+  translate(width/2, height/2, -height/2);
+  scale(2.0);
+  
+  // Update and constrain the angle
+  angle += 0.005;
+  rotateY(angle);  
+  
+  // Display the image mass
+  for (int i = 0; i < a.height; i += 4) {
+    for (int j = 0; j < a.width; j += 4) {
+      stroke(values[j][i], 255);
+      line(j-a.width/2, i-a.height/2, -values[j][i], j-a.width/2, i-a.height/2, -values[j][i]-10);
+    }
+  }
+}