//Handle Leap Gesture processing.
//Trigger the corresponding effects in the particle field.
void GesturesDemo::processGestures() {
  Leap::Frame frame = controller.frame();

  if ( lastFrame == frame ) {
    return;
  }

  Leap::GestureList gestures =  lastFrame.isValid()       ?
                                frame.gestures(lastFrame) :
                                frame.gestures();

  lastFrame = frame;

  size_t numGestures = gestures.count();

  for (size_t i=0; i < numGestures; i++) {
    if (gestures[i].type() == Leap::Gesture::TYPE_SCREEN_TAP) {
      printf("screen screen tap gesture");
      Leap::ScreenTapGesture tap = gestures[i];
      ci::Vec3f tapLoc = normalizeCoords(tap.position());
      field.Repel(tap.id(), ci::Vec2f(tapLoc.x, tapLoc.y), 3.0);
    } else if (gestures[i].type() == Leap::Gesture::TYPE_KEY_TAP) {
      printf("screen key tap gesture");
      Leap::KeyTapGesture tap = gestures[i];
      ci::Vec3f tapLoc = normalizeCoords(tap.position());
      field.Repel(tap.id(), ci::Vec2f(tapLoc.x, tapLoc.y), -3.0);
    } else if (gestures[i].type() == Leap::Gesture::TYPE_SWIPE) {
      printf(" swipe  gesture");
      Leap::SwipeGesture swipe = gestures[i];
      Leap::Vector diff = 0.004f*(swipe.position() - swipe.startPosition());
      ci::Vec3f curSwipe(diff.x, -diff.y, diff.z);
      field.Translate(swipe.id(), curSwipe);
    } else if (gestures[i].type() == Leap::Gesture::TYPE_CIRCLE) {
      printf(" circle gesture");
      Leap::CircleGesture circle = gestures[i];
      float progress = circle.progress();
      if (progress >= 1.0f) {
        ci::Vec3f center = normalizeCoords(circle.center());
        ci::Vec3f normal(circle.normal().x, circle.normal().y, circle.normal().z);
        double curAngle = 6.5;
        if (normal.z < 0) {
          curAngle *= -1;
        }
        field.Rotate(circle.id(), ci::Vec2f(center.x, center.y), circle.radius()/250, curAngle);
      }
    }
  }
}
void QtLeapScreenTapGesture::update(const Leap::Gesture &gesture)
{
    Leap::ScreenTapGesture tapGesture = static_cast<Leap::ScreenTapGesture>(gesture);
    this->setId(tapGesture.id());
    this->setState(gesture.state());
    this->setDirection(QVector3D(tapGesture.direction().x,
                               tapGesture.direction().y,
                               tapGesture.direction().x));
    this->setPosition(QVector3D(tapGesture.position().x,
                                tapGesture.position().y,
                                tapGesture.position().z));
    this->setState(tapGesture.state());
}