---
title: utils.beamIntersectsCircle()
---
The `utils.beamIntersectsCircle()` function finds the intersection between an
endless line through points `point1` and `point2` and a circle with its center
at point `center` and a radius of `radius` mm.
## Signature
```js
array | false utils.beamIntersectsCircle(
Point center,
float radius,
Point point1,
Point point1,
string sort=x
)
```
The 5th and last parameter controls the _sorting_ of the found intersections.
This will (almost) always return 2 intersections, and you can choose how
they are ordered in the returned array:
Set sort to:
- `x` : The point with the lowest X-coordinate will go first (left to right)
- `y` : The point with the lowest Y-coordinate will go first (top to bottom)
## Example
<Example caption="A utils.beamIntersectsCircle() example">
```js
({ Point, points, Path, paths, Snippet, snippets, utils, part }) => {
points.A = new Point(45, 45)
.addCircle(35, "Fabric")
points.B = new Point(5, 50)
points.C = new Point(25, 30)
points.D = new Point(5, 65)
points.E = new Point(65, 5)
points.F = new Point(15, 75)
points.G = new Point(75, 15)
paths.line1 = new Path().move(points.B).line(points.C)
paths.line2 = new Path().move(points.D).line(points.E)
paths.line3 = new Path().move(points.F).line(points.G)
let intersections1 = utils.beamIntersectsCircle(
points.A,
points.A.attributes.get("data-circle"),
points.B,
points.C
)
let intersections2 = utils.beamIntersectsCircle(
points.A,
points.A.attributes.get("data-circle"),
points.D,
points.E,
"y"
)
let intersections3 = utils.beamIntersectsCircle(
points.A,
points.A.attributes.get("data-circle"),
points.F,
points.G
)
snippets.first1 = new Snippet("bnotch", intersections1[0])
snippets.second1 = new Snippet("notch", intersections1[1])
snippets.first2 = new Snippet("bnotch", intersections2[0])
snippets.second2 = new Snippet("notch", intersections2[1])
snippets.first3 = new Snippet("bnotch", intersections3[0])
snippets.second3 = new Snippet("notch", intersections3[1])
return part
}
```
</Example>
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