Intersect function

Intersect(obj1, obj2, n)

Find the nth intersection between the given obj1 and the given obj2. The index n is one-based.

Caution

Although n is interpreted as a one-based index, values smaller than 1 are mapped to 1. Values for n larger than the number of intersections between obj1 and obj2 produce a Point both of whose coordinates are NaN.