26 lines
586 B
JavaScript
26 lines
586 B
JavaScript
export function clamp(n, min, max) {
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return Math.max(min, Math.min(max, n));
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}
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export function distance({x: lx, y: ly}, {x: rx, y: ry}) {
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const xd = lx - rx;
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const yd = ly - ry;
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return Math.sqrt(xd * xd + yd * yd);
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}
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export function intersects(l, r) {
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if (l.x0 > r.x1) return false;
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if (l.y0 > r.y1) return false;
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if (l.x1 < r.x0) return false;
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if (l.y1 < r.y0) return false;
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return true;
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}
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export function normalizeVector({x, y}) {
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if (0 === y && 0 === x) {
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return {x: 0, y: 0};
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}
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const k = 1 / Math.sqrt(x * x + y * y);
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return {x: x * k, y: y * k};
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}
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