The closest points of two segments, into target1 (on l1) and target2 (three-mesh-bvh's closestPointsSegmentToSegment).
target1
l1
target2
closestPointsSegmentToSegment
The closest points of two segments, into
target1(onl1) andtarget2(three-mesh-bvh'sclosestPointsSegmentToSegment).