// Global input processor listener implementation (IMTInputEventListener)
  public boolean processInputEvent(MTInputEvent inEvt) {
    if (inEvt instanceof MTFiducialInputEvt) {
      MTFiducialInputEvt fEvt = (MTFiducialInputEvt) inEvt;
      int fID = fEvt.getFiducialId();
      Vector3D position = fEvt.getPosition();

      AbstractShape comp;
      switch (fEvt.getId()) {
        case MTFiducialInputEvt.INPUT_STARTED:
          // Create a new component for the fiducial
          AbstractShape newComp = createComponent(fID, position);
          fiducialIDToComp.put(fID, newComp); // Map id to component
          // Move component to fiducial position
          newComp.setPositionGlobal(position);
          // Save the absolute rotation angle in the component for late
          newComp.setUserData("angle", fEvt.getAngle());
          // Rotate the component
          newComp.rotateZ(
              newComp.getCenterPointRelativeToParent(), MTApplication.degrees(fEvt.getAngle()));
          // Add the component to the canvas to draw it
          getCanvas().addChild(newComp);
          break;
        case MTFiducialInputEvt.INPUT_UPDATED:
          // Retrieve the corresponding component for the fiducial ID from the map
          comp = fiducialIDToComp.get(fID);
          if (comp != null) {
            // Set the new position
            comp.setPositionGlobal(position);
            // Set the rotation (we have to do a little more here because
            // mt4j does incremental rotations instead of specifying an absolute angle)
            float oldAngle = (Float) comp.getUserData("angle"); // retrieve the "old" angle
            float newAngle = fEvt.getAngle();
            if (oldAngle != newAngle) {
              float diff = newAngle - oldAngle;
              comp.setUserData("angle", newAngle);
              diff = MTApplication.degrees(diff); // our rotation expects degrees (not radians)
              comp.rotateZ(comp.getCenterPointRelativeToParent(), diff);
            }
          }
          break;
        case MTFiducialInputEvt.INPUT_ENDED:
          comp = fiducialIDToComp.get(fID);
          if (comp != null) {
            comp.destroy();
            fiducialIDToComp.remove(fID);
          }
          break;
        default:
          break;
      }
    }
    return false;
  }
  /** Private method, fiducial has been updated */
  private void updated() {
    AbstractShape component = FiducialRegistry.getInstance().getFiducialComponent(EventID);

    if (component != null) {
      component.setPositionGlobal(event.getPosition());
      float oldAngle = (Float) component.getUserData("angle"); // retrieve the "old" angle
      float newAngle = event.getAngle();
      if (oldAngle != newAngle) {
        float diff = newAngle + oldAngle;
        component.setUserData("angle", newAngle);
        diff = MTApplication.degrees(diff); // our rotation expects degrees (not radians)
        component.rotateZ(component.getCenterPointRelativeToParent(), diff);
      }
    }
  }