blue book examples

java/examples/Books/Processing Handbook/Illustrations/page_366/page_366.pde

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+
+// Based on code 32-04 (p. 294)
+
+
+float angle = 0.0;   // Changing angle
+float speed = 0.2;  // Speed of growth
+
+void setup() {
+  size(200*11, 200*10);
+  noStroke();
+  smooth();
+  fill(0, 60);
+}
+
+void draw() {
+  background(255);
+
+  for(int y = 0; y < 10; y++) {
+    for(int i = 0; i < 11; i++) {
+      pushMatrix();
+      translate(i*200, y*220);
+      circlePhase(0.0);
+      circlePhase(QUARTER_PI);
+      circlePhase(HALF_PI);
+      angle += speed;
+      popMatrix();
+    }
+    
+  }
+  save("page_366.tif");
+  exit();
+}
+
+void circlePhase(float phase) {
+  float diameter = 65 + (sin(angle + phase) * 130);
+  ellipse(100, 100, diameter, diameter);
+}