How may I draw a line from non indexed points in three.js? Vector3.getClosestPoint()?

This is a working .html example.
Three.js Clipping Plane Intersect Points

I dont see anything like…
myPoint.getClosestPointFromArray(myPointArray, maxDistance:[int], minDistance[int]);
otherwise I would start drawing in a loop as this doesn’t have to be fancy. What method would you begin to start working with to draw from the points?