A curve representing a 2d line segment.
[page:Vector2 v1] – The start point.
[page:Vector2 v2] - The end point.
See the base [page:Curve] class for common properties.
The start point.
The end point
See the base [page:Curve] class for common methods.
[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]