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优化线条

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CN-JS-HuiBai
2026-04-06 19:43:17 +08:00
parent 92f97b7e51
commit 47a795cd73
1 changed files with 14 additions and 6 deletions
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public/js/app.js
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@@ -976,18 +976,26 @@
const pts = [start, end].slice().sort((a, b) => a[0] - b[0] || a[1] - b[1]);
const isForward = (start === pts[0]);
// Simplified calculation to reduce crossings
// Maintaining a consistent direction for single lines ensures that parallel paths stay parallel
// Normalization and special routing rules
const lowS = (route.source || '').toLowerCase().trim();
const lowD = (route.dest || '').toLowerCase().trim();
const isSeattleJapan = ( (lowS === 'seattle' || lowS === 'us seattle') && lowD === 'japan' ) ||
( (lowD === 'seattle' || lowD === 'us seattle') && lowS === 'japan' );
let finalCurve = 0;
if (count === 1) {
// Subtle consistent curve for single routes
if (isSeattleJapan) {
// Special rule: Seattle ↔ Japan route curves upward (North)
// For Seattle -> Japan (Westbound): Right is North (+).
// For Japan -> Seattle (Eastbound): Right is South (+), so North is (-).
const isWestbound = (lowS === 'seattle' || lowS === 'us seattle');
finalCurve = isWestbound ? 0.3 : -0.3;
} else if (count === 1) {
// Subtle consistent curve for single routes to maintain parallelism
finalCurve = 0.12;
} else {
// Symmetrical fan-out for multiple lines between the same points
// This spreads them cleanly into "eye" shapes without biased clustering
const magnitude = 0.12 + Math.floor(i / 2) * 0.12;
const spread = (i % 2 === 0) ? magnitude : -magnitude;
// Ensure visual consistency regardless of the data direction (A->B or B->A)
finalCurve = isForward ? spread : -spread;
}