4b83212f41
- Add path.intersectsBeam() method - Add utils.beamIntersectsLine() method - Simplify calculation and improve precision on beam intersections - Document return types properly - beamIntersectsCurve now uses the proper function from Bezier library instead of emulating it by constructing a huge line - docs: path.intersect... methods never return false, they simply return an empty array in case of no intersection
45 lines
1 KiB
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45 lines
1 KiB
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---
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title: utils.beamIntersectsLine()
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---
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The `utils.beamIntersectsLine()` function finds the intersection between an endless
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line (beam) and a (limited) line segment. Returns a [Point](/reference/api/point) object for the
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intersection, or `false` if the beam doesn't intersect the line.
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The first two points in the parameter list form the beam, the last two points form the line.
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## Signature
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```js
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Point | false utils.beamIntersectsLine(
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Point beamA,
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Point beamB,
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Point lineA,
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Point lineB
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)
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```
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## Example
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<Example caption="A Utils.beamIntersectsLine() 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, 20)
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points.B = new Point(60, 15)
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points.C = new Point(10, 10)
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points.D = new Point(50, 40)
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paths.AB = new Path().move(points.A).line(points.B).addClass('dotted')
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paths.CD = new Path().move(points.C).line(points.D)
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snippets.x = new Snippet(
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'notch',
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utils.beamIntersectsLine(points.A, points.B, points.C, points.D)
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)
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return part
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}
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```
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</Example>
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