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✨ Added utils.beamCrossesX()

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Joost De Cock 2018-08-14 16:18:16 +02:00
parent 463052529d
commit 7bde9516f8
1 changed files with 9 additions and 0 deletions
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9
src/utils.js
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@ -46,6 +46,15 @@ export function linesCross(a1, a2, b1, b2) {
else return false;
}
/** Find where an (endless) line crosses a certain X-value */
export function beamCrossesX(from, to, x) {
if (from.x === to.x) return false; // Vertical line
let top = new Point(x, -10);
let bottom = new Point(x, 10);
return beamsCross(from, to, top, bottom);
}
/** Find where an (endless) line crosses a certain Y-value */
export function beamCrossesY(from, to, y) {
if (from.y === to.y) return false; // Horizontal line