jerstucki / line-segments-intersect

See if two line segments intersect

line-segments-intersect

See if two line segments intersect or not. This uses the vector cross product approach described here: http://stackoverflow.com/a/565282/786339. This derives its algorithm from: "Intersection of two lines in three-space" by Ronald Goldman.

How to use

Include the line-segments-intersect.js script in your HTML. Then call doLineSegmentsIntersect(p, p2, q, q2) to see if the line segment between the points p and p2 intersect with the line segment between q and q2.

Tests

I have included the unit tests I put together in the index html as an example.