Given two orthogonal segments that intersect at intersection, and a size len return a path comprised of three points that describe a perpendicular mark at the angle where the segments intersect.
intersection
len
First line segment
Second line segment
Point of intersection
Side length of square marker
Path data for oriented square
Given two orthogonal segments that intersect at
intersection, and a sizelenreturn a path comprised of three points that describe a perpendicular mark at the angle where the segments intersect.