function epsilon( value ) {

		return Math.abs( value ) < 1e-10 ? 0 : value;

	}
Based on http://www.emagix.net/academic/mscs-project/item/camera-sync-with-css3-and-webgl-threejs
@author mrdoob / http://mrdoob.com/
@author yomotsu / https://yomotsu.net/