freesewing/markdown/dev/reference/api/utils/beamintersectsy/en.md

title
beamIntersectsY()

Point | false utils.beamIntersectsY(Point A, Point B, float Y)

Finds the intersection between an endless line and a given Y-value. Returns a Point object for the intersection, or false there is no intersection.

let {
  Point,
  points,
  Path,
  paths,
  Snippet,
  snippets,
  utils
} = part.shorthand();

points.A = new Point(10, 10);
points.B = new Point(50, 40);

paths.AB = new Path().move(points.A).line(points.B);

snippets.x = new Snippet("notch", utils.beamIntersectsY(points.A, points.B, 30));

paths.help = new Path()
  .move(new Point(0, 30))
  .line(new Point(50, 30))
  .attr("class", "note dashed");