connect( element ) {

		super.connect( element );

		this.domElement.addEventListener( 'pointermove', this._onPointerMove );
		this.domElement.addEventListener( 'pointerdown', this._onPointerDown );
		this.domElement.addEventListener( 'pointerup', this._onPointerCancel );
		this.domElement.addEventListener( 'pointerleave', this._onPointerCancel );
		this.domElement.addEventListener( 'contextmenu', this._onContextMenu );

		this.domElement.style.touchAction = 'none'; // disable touch scroll

	}
The raycaster used for detecting 3D objects.

@type {Raycaster}