优化线路图
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@@ -782,6 +782,41 @@
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const endCoords = getShiftedCoords(route.dest);
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if (startCoords && endCoords) {
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// Calculate direction and distance
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const dx = endCoords[0] - startCoords[0];
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const dy = endCoords[1] - startCoords[1];
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// Identify major regions
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const src = (route.source || '').toLowerCase();
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const dst = (route.dest || '').toLowerCase();
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const isUS = (n) => n.includes('united states') || n.includes('us ') || n.includes('seattle') || n.includes('san francisco') || n.includes('los angeles') || n.includes('new york') || n.includes('chicago');
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const isJapan = (n) => n.includes('japan') || n.includes('tokyo');
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const isAsia = (n) => n.includes('china') || n.includes('hong kong') || n.includes('singapore') || n.includes('korea') || n.includes('seoul') || n.includes('japan') || n.includes('tokyo') || n.includes('shanghai') || n.includes('beijing');
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const isEurope = (n) => n.includes('germany') || n.includes('uk') || n.includes('france') || n.includes('london') || n.includes('frankfurt') || n.includes('paris') || n.includes('united kingdom');
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// Determine base curveness to always bend North (Upward) for major East-West routes
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// In this map: dx < 0 (Westward) -> negative curveness bends North
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// dx > 0 (Eastward) -> positive curveness bends North
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let baseCurve = 0.2;
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if (dx < 0) baseCurve = -0.2;
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// Special case: Trans-Pacific (US <-> Japan/Asia) - usually deeper curve
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if ((isUS(src) && isAsia(dst)) || (isAsia(src) && isUS(dst))) {
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baseCurve = (dx < 0 ? -0.35 : 0.35);
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}
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// Trans-Atlantic (US <-> Europe) - use coordinates to detect
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else if ((isUS(src) && isEurope(dst)) || (isEurope(src) && isUS(dst))) {
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baseCurve = (dx < 0 ? -0.25 : 0.25);
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}
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// Intra-Asia or shorter routes - flatter curve
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else if (Math.abs(dx) < 50) {
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baseCurve = (dx < 0 ? -0.15 : 0.15);
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}
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// Add variation for multiple lines to same destination
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const finalCurve = baseCurve + (index * 0.04 * (baseCurve > 0 ? 1 : -1));
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finalSeries.push({
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type: 'lines',
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coordinateSystem: 'geo',
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@@ -798,7 +833,7 @@
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lineStyle: {
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color: 'rgba(99, 102, 241, 0.3)',
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width: 2,
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curveness: 0.2 + (index * 0.1) // Slightly different curves for clarity
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curveness: finalCurve
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},
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tooltip: {
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formatter: () => {
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