added multi-touch example

Author: codeanticode

examples/Topics/Interaction/Multitouch/Multitouch.pde

@@ -0,0 +1,33 @@
+float scale;
+
+void setup() {
+  fullScreen();
+  noStroke();
+  scale = displayDensity / 2.65;
+  colorMode(HSB, 350, 100, 100);
+  textFont(createFont("SansSerif", scale * 60));
+}
+
+void draw() {
+  background(30, 0, 100);
+  fill(30, 0, 20);
+  text("Number of touch points: " + touches.length, 20, scale * 100);
+  for (int i = 0; i < touches.length; i++) {
+    float s = scale * map(touches[i].area, 0, 1, 50, 500);
+    println(touches[i].area);
+    fill(30, map(touches[i].pressure, 0.6, 1.6, 0, 100), 70, 200);
+    ellipse(touches[i].x, touches[i].y, s, s);
+  }
+}
+
+void touchStarted() {
+  println("Touch started");
+}
+
+void touchEnded() {
+  println("Touch ended");
+}
+
+void touchMoved() {
+  println("Touch moved");
+}