Optional includeCollinear: boolean = falsetrue will include points collinear along the boundary
Optional epsilon: number = EPSILONundefined behavior when larger than 0.01
not the points, but the indices of points in your "points" array
Convex hull from a set of 2D points, choose whether to include or exclude points which lie collinear inside one of the boundary lines. modified Graham scan algorithm.
array of points, each point an array of numbers