Switch threejs controls ( from TrackBall to FlyControls and vice versa)

Question

What I am trying to achieve is to have two control modes, a free \"flying\" one, and an object-centered one (trackball) and with a button press seamlessly switch between the

Answer 1

What about something like this?

function onClick() {

    var prevCamera = camera;

    camera = new THREE.PerspectiveCamera(...);
    camera.position.copy( prevCamera.position );
    camera.rotation.copy( prevCamera.rotation );

    var MODE = { TRACKBALL: 0, FLY: 1 };

    switch( mode ) {

        case MODE.FLY:

            controls = new THREE.TrackballControls( camera );

            mode = MODE.TRACKBALL;

            break;

        case MODE.TRACKBALL:

            controls = new THREE.FlyControls( camera );

            mode = MODE.FLY;

            break;

    }

}