The avatar for @mourner
Volodymyr Agafonkin
Engineer at Mapbox, creator of Leaflet, algorithms geek, open source enthusiast, musician, father of twin girls, Ukrainian. 🇺🇦
Public
Edited
Mar 27, 2021
1 fork
Importers
39 stars
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orient = (rx, ry, qx, qy, px, py) => (px - rx) * (qy - ry) - (py - ry) * (qx - rx)
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orientSymmetrical = (rx, ry, qx, qy, px, py) =>
(px * qy - py * qx) + (qx * ry - qy * rx) + (rx * py - ry * px)
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orientSymmetrical2 = (rx, ry, qx, qy, px, py) =>
(px * qy + qx * ry + rx * py) - (py * qx + qy * rx + ry * px)
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orientBetter = {
function orient(px, py, rx, ry, qx, qy) {
const l = (ry - py) * (qx - px);
const r = (rx - px) * (qy - py);
return Math.abs(l - r) >= 3.3306690738754716e-16 * Math.abs(l + r) ? l - r : 0;
}
return (rx, ry, qx, qy, px, py) =>
orient(px, py, rx, ry, qx, qy) ||
orient(rx, ry, qx, qy, px, py) ||
orient(qx, qy, px, py, rx, ry);
}
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orientRobust = (await import('https://cdn.skypack.dev/robust-predicates@3.0.0')).orient2d
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