`path.intersectionWithLine(line [, opt])`

Return an array of the intersection points of the path and the line. Return `null`

if no intersection exists.

The `opt`

argument is optional. Two properties may be specified, `opt.precision`

and `opt.segmentSubdivisions`

, which determine maximum error allowed in `pointAtLength`

calculations for curved segments (default precision is 3; this corresponds to maximum observed error of 0.1%). The `opt.segmentSubdivisions`

property is an array of individual segments' subdivision arrays. The `path.getSegmentSubdivisions()`

function may be used to obtain the `segmentSubdivisions`

array. The `opt.precision`

property is still necessary, however; it determines the precision of the point search algorithm in curved segments.