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freesewing/markdown/dev/reference/api/path/intersects/en.md
Joost De Cock b34a2ee2ed feat: Flat import of markdown repo
This is a flat (without history) import of (some of) the content
from our markdown module.

We've imported this without history because the repo contains our
blog posts and showcases posts content prior to porting them to strapi.

Since this contains many images, it would balloon the size of this repo
to import the full history.

Instead, please refer to the history of the (archived) markdown repo
at: https://github.com/freesewing/markdown
2021-08-25 16:09:31 +02:00

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title
intersects()
array|false path.intersects(Path path)

Returns the Point object(s) where the path intersects with a path you pass it.

Use the intersection methods in Utils whenever possible

This is an expensive (read: slow) method that you should only use when you don't know in advance in what segment of your path the intersection will occur.

If you do know, use one of the intersection methods in Utils.

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

points.A = new Point(45, 60);
points.B = new Point(10, 30);
points.BCp2 = new Point(40, 20);
points.C = new Point(90, 30);
points.CCp1 = new Point(50, -30);
points.D = new Point(50, 130);
points.DCp1 = new Point(150, 30);

points._A = new Point(55, 40);
points._B = new Point(0, 55);
points._BCp2 = new Point(40, -20);
points._C = new Point(90, 40);
points._CCp1 = new Point(50, -30);
points._D = new Point(40, 120);
points._DCp1 = new Point(180, 40);

paths.demo1 = new Path()
  .move(points.A)
  .line(points.B)
  .curve(points.BCp2, points.CCp1, points.C)
  .curve(points.DCp1, points.DCp1, points.D);
paths.demo2 = new Path()
  .move(points._A)
  .line(points._B)
  .curve(points._BCp2, points._CCp1, points._C)
  .curve(points._DCp1, points._DCp1, points._D);

for (let p of paths.demo1.intersects(paths.demo2)) {
  snippets[part.getId()] = new Snippet("notch", p);
}