/** Check whether a hand (of any user) touches the radio. Play radio if it does. */
public void checkHands() {
MyWorld world = (MyWorld) getWorld();
UserData[] users = world.getTrackedUsers();
for (UserData user : users) {
Joint rightHand = user.getJoint(Joint.RIGHT_HAND);
Radio radio = getRadio(rightHand.getX(), rightHand.getY());
if (radio != null) { // yes, there was a radio
radio.play(1);
} else {
Joint leftHand = user.getJoint(Joint.LEFT_HAND);
radio = getRadio(leftHand.getX(), leftHand.getY());
if (radio != null) {
radio.play(2);
}
}
}
}
/** Display a tracked user on screen */
private void trackUser(UserData user) {
for (int i = 0; i < Joint.NUM_JOINTS; i++) {
Joint joint = user.getJoint(i);
dot[i].set(joint.getX(), joint.getY());
}
}