fromMesh( mesh ) {

		this.fromWireframeGeometry( new WireframeGeometry( mesh.geometry ) );

		// set colors, maybe

		return this;

	}
Setups this line segments geometry from the given mesh.

@param {Mesh} mesh - The mesh geometry that should be used as a data source for this geometry.
@return {LineSegmentsGeometry} A reference to this geometry.