digital-garbageandClaude Sonnet 5.5
fe2d561316
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
13 lines
645 B
JavaScript
13 lines
645 B
JavaScript
// Magnetic edges: a dragged edge within `reach` seconds of an anchor lands on it.
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/** The shift (seconds) that puts the nearest of `edges` on the nearest anchor, or `delta` unchanged when none is close. */
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export function snapDelta(delta, edges, anchors, reach) {
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let best = null;
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for (const edge of edges) for (const a of anchors) {
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if (Math.abs(a - edge) < 1e-6) continue; // where the edge already is: a butting neighbour must not pin it
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const off = a - (edge + delta);
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if (Math.abs(off) < reach && (best === null || Math.abs(off) < Math.abs(best))) best = off;
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}
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return best === null ? delta : delta + best;
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}
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