ab3204f9f1
The replaces the NextJS site powering FreeSewing.dev with a Docusaurus setup. It's part of my efforts to simplify FreeSewing's setup so we can focus on our core value proposition.
80 lines
2.1 KiB
Text
80 lines
2.1 KiB
Text
---
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title: utils.beamIntersectsCircle()
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---
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The `utils.beamIntersectsCircle()` function finds the intersection between an
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endless line through points `point1` and `point2` and a circle with its center
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at point `center` and a radius of `radius` mm.
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## Signature
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```js
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array | false utils.beamIntersectsCircle(
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Point center,
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float radius,
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Point point1,
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Point point1,
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string sort=x
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)
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```
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The 5th and last parameter controls the _sorting_ of the found intersections.
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This will (almost) always return 2 intersections, and you can choose how
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they are ordered in the returned array:
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Set sort to:
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- `x` : The point with the lowest X-coordinate will go first (left to right)
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- `y` : The point with the lowest Y-coordinate will go first (top to bottom)
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## Example
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<Example caption="A utils.beamIntersectsCircle() example">
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```js
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({ Point, points, Path, paths, Snippet, snippets, utils, part }) => {
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points.A = new Point(45, 45)
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.addCircle(35, "Fabric")
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points.B = new Point(5, 50)
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points.C = new Point(25, 30)
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points.D = new Point(5, 65)
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points.E = new Point(65, 5)
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points.F = new Point(15, 75)
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points.G = new Point(75, 15)
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paths.line1 = new Path().move(points.B).line(points.C)
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paths.line2 = new Path().move(points.D).line(points.E)
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paths.line3 = new Path().move(points.F).line(points.G)
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let intersections1 = utils.beamIntersectsCircle(
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points.A,
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points.A.attributes.get("data-circle"),
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points.B,
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points.C
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)
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let intersections2 = utils.beamIntersectsCircle(
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points.A,
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points.A.attributes.get("data-circle"),
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points.D,
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points.E,
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"y"
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)
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let intersections3 = utils.beamIntersectsCircle(
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points.A,
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points.A.attributes.get("data-circle"),
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points.F,
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points.G
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)
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snippets.first1 = new Snippet("bnotch", intersections1[0])
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snippets.second1 = new Snippet("notch", intersections1[1])
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snippets.first2 = new Snippet("bnotch", intersections2[0])
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snippets.second2 = new Snippet("notch", intersections2[1])
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snippets.first3 = new Snippet("bnotch", intersections3[0])
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snippets.second3 = new Snippet("notch", intersections3[1])
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return part
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}
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```
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</Example>
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