this.modelCar = new AR.Model("assets/car.wt3", {
            onLoaded: World.showInfoBar,
            onError: World.onError,
            zOrder: 1,
            scale: {
                x: 0.045,
                y: 0.045,
                z: 0.045
            },
            translate: {
                x: 0.0,
                y: 0.05,
                z: 0.0
            },
            rotate: {
                z: -25
            }
        });

        this.trackable = new AR.ImageTrackable(this.tracker, "*", {
            drawables: {
                cam: [this.modelCar]
            },
            onImageRecognized: World.hideInfoBar,
            onError: World.onError
        });