Initial Commit

Java/Processing/processing-3.3.6/modes/java/examples/Topics/Drawing/Pulses/Pulses.pde

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+/**
+ * Pulses. 
+ * 
+ * Software drawing instruments can follow a rhythm or abide by rules independent
+ * of drawn gestures. This is a form of collaborative drawing in which the draftsperson
+ * controls some aspects of the image and the software controls others.
+ */
+
+int angle = 0;
+
+void setup() {
+  size(640, 360);
+  background(102);
+  noStroke();
+  fill(0, 102);
+}
+
+void draw() {
+  // Draw only when mouse is pressed
+  if (mousePressed == true) {
+    angle += 5;
+    float val = cos(radians(angle)) * 12.0;
+    for (int a = 0; a < 360; a += 75) {
+      float xoff = cos(radians(a)) * val;
+      float yoff = sin(radians(a)) * val;
+      fill(0);
+      ellipse(mouseX + xoff, mouseY + yoff, val, val);
+    }
+    fill(255);
+    ellipse(mouseX, mouseY, 2, 2);
+  }
+}