var MouseZoom = pc.createScript('mouseZoom');
MouseZoom.attributes.add('targetFOV', { type: 'number' });

// initialize code called once per entity
MouseZoom.prototype.initialize = function() {
    this.originalFOV = this.entity.camera.fov;
    this.pos = new pc.Vec3();

    // Disabling the context menu stops the browser displaying a menu when
    // you right-click the page
    this.app.mouse.disableContextMenu();

    this.app.mouse.on(pc.EVENT_MOUSEDOWN, this.onMouseDown, this);
    this.app.mouse.on(pc.EVENT_MOUSEUP, this.onMouseUp, this);
};


MouseZoom.prototype.onMouseDown = function (event) {

    // If the right mouse button is pressed, apply the target FOV
    if (event.button === pc.MOUSEBUTTON_RIGHT) {
        this.entity.camera.fov = this.targetFOV;

        //TODO: Set sensitivity down
    }
};

MouseZoom.prototype.onMouseUp = function (event) {

    // If the right mouse button is pressed, return to normal FOV.
    if (event.button === pc.MOUSEBUTTON_RIGHT) {
        this.entity.camera.fov = this.originalFOV;
    }
};