getViewSize( distance, target ) {

		this.getViewBounds( distance, _minTarget, _maxTarget );

		return target.subVectors( _maxTarget, _minTarget );

	}
Computes the width and height of the camera's viewable rectangle at a given distance along the viewing direction.

@param {number} distance - The viewing distance.
@param {Vector2} target - The target vector that is used to store result where x is width and y is height.
@returns {Vector2} The view size.