fromLineSegments( lineSegments ) {

		const geometry = lineSegments.geometry;

		this.setPositions( geometry.attributes.position.array ); // assumes non-indexed

		// set colors, maybe

		return this;

	}
Setups this line segments geometry from the given line segments.

@param {LineSegments} lineSegments - The line segments that should be used as a data source for this geometry.
Assumes the source geometry is not using indices.
@return {LineSegmentsGeometry} A reference to this geometry.