Mouse Orbit

gistfile1.js

var target : Transform;

var distance = 10.0;
var xSpeed = 250.0;
var ySpeed = 120.0;
var zoomSpeed = 10;

var yMinLimit = -20;
var yMaxLimit = 80;
var zoomMinLimit = 10;
var zoomMaxLimit = 50;

private var x = 0.0;
private var y = 0.0;

@script AddComponentMenu("Camera-Control/Mouse Orbit")
function Start () {
    var angles = transform.eulerAngles;
    x = angles.y;
    y = angles.x;
    
    // Make the rigid body not change rotation
    if (rigidbody)
        rigidbody.freezeRotation = true;
}
function LateUpdate () {
    if (target) {
        if(Input.GetMouseButton(1)){
            // Only update rotation if Right Mouse button is held down
            x += Input.GetAxis("Mouse X") * xSpeed * 0.02;
            y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02;
            y = ClampAngle(y, yMinLimit, yMaxLimit);
        }
        //Zooming can be done without holding down the Right Mouse button
        distance -=  Input.GetAxis("Mouse ScrollWheel") * zoomSpeed;
        distance = Mathf.Clamp(distance, zoomMinLimit, zoomMaxLimit);
        
        var rotation = Quaternion.Euler(y, x, 0);
        var position = rotation * Vector3(0.0, 0.0, -distance) + target.position;
        
        target.rotation = rotation;
        transform.rotation = rotation;
        transform.position = position;
    }
}
static function ClampAngle (angle : float, min : float, max : float) {
        if (angle < -360)
                angle += 360;
        if (angle > 360)
                angle -= 360;
        return Mathf.Clamp (angle, min, max);
}