Function lineLineIntersection

lineLineIntersection(a, b, c, d, options?): LineIntersection
An internal helper method for computing the intersection between two infinite-length lines. Adapted from http://paulbourke.net/geometry/pointlineplane/.
Parameters
- a: Point
  The first endpoint of segment AB
- b: Point
  The second endpoint of segment AB
- c: Point
  The first endpoint of segment CD
- d: Point
  The second endpoint of segment CD
- Optional options: {
  t1: boolean;
  } = {}
  Options which affect the intersection test
  - t1: boolean
    Return the optional vector distance from C to D on CD
Returns LineIntersection
An intersection point, or null if no intersection occurred