emergency: widen route fallback and include motorway chains

vendor/clouds3d.js

@@ -3533,16 +3533,17 @@ function nearestEmergencyCity() {
     return best;
 }
 
-function emergencyCollectCandidates(sec, startCity, minKm, maxKm, nearLimit) {
+function emergencyCollectCandidates(net, netKey, startCity, minKm, maxKm, nearLimit) {
     var targetKm = (minKm + maxKm) / 2;
     var out = [];
+    if (!net || !net.cnts || !net.cnts.length) return out;
     var k = 0;
-    for (var ci = 0; ci < sec.cnts.length; ci++) {
-        var n = sec.cnts[ci];
+    for (var ci = 0; ci < net.cnts.length; ci++) {
+        var n = net.cnts[ci];
         if (n < 2) { k += n * 3; continue; }
-        var firstX = sec.pts[k], firstZ = sec.pts[k + 1], firstD = sec.pts[k + 2];
+        var firstX = net.pts[k], firstZ = net.pts[k + 1], firstD = net.pts[k + 2];
         var last = k + (n - 1) * 3;
-        var lastX = sec.pts[last], lastZ = sec.pts[last + 1], lastD = sec.pts[last + 2];
+        var lastX = net.pts[last], lastZ = net.pts[last + 1], lastD = net.pts[last + 2];
         var len = Math.max(0, lastD - firstD);
         var lenKm = len * KM_PER_TILE;
         var dStart = Math.hypot(firstX - startCity.x, firstZ - startCity.z);
@@ -3550,7 +3551,7 @@ function emergencyCollectCandidates(sec, startCity, minKm, maxKm, nearLimit) {
         var near = Math.min(dStart, dEnd);
         if (near <= nearLimit && lenKm >= minKm && lenKm <= maxKm) {
             out.push({
-                ci: ci, len: len, lenKm: lenKm, near: near,
+                net: net, netKey: netKey, ci: ci, len: len, lenKm: lenKm, near: near,
                 score: Math.abs(lenKm - targetKm) + near * 18,
                 reverse: dEnd < dStart
             });
@@ -3560,6 +3561,17 @@ function emergencyCollectCandidates(sec, startCity, minKm, maxKm, nearLimit) {
     return out;
 }
 
+function emergencyNetworks() {
+    var out = [];
+    if (carGeo && carGeo.secondary && carGeo.secondary.cnts && carGeo.secondary.cnts.length) {
+        out.push({ net: carGeo.secondary, key: 'secondary' });
+    }
+    if (carGeo && carGeo.motorway && carGeo.motorway.cnts && carGeo.motorway.cnts.length) {
+        out.push({ net: carGeo.motorway, key: 'motorway' });
+    }
+    return out;
+}
+
 function emergencyShuffle(arr) {
     for (var i = arr.length - 1; i > 0; i--) {
         var j = Math.floor(Math.random() * (i + 1));
@@ -3578,16 +3590,21 @@ function selectEmergencyRoutes() {
         return;
     }
     emergencyStartCity = nearestEmergencyCity();
-    var sec = carGeo.secondary;
-    var pool = emergencyCollectCandidates(sec, emergencyStartCity, EMERGENCY_MIN_KM, EMERGENCY_MAX_KM, 1.2);
-    var poolMode = 'strict';
-    if (!pool.length) {
-        pool = emergencyCollectCandidates(sec, emergencyStartCity, EMERGENCY_MIN_KM * 0.55, EMERGENCY_MAX_KM * 1.45, 1.8);
-        poolMode = 'relaxed';
-    }
-    if (!pool.length) {
-        pool = emergencyCollectCandidates(sec, emergencyStartCity, 10, 160, 3.0);
-        poolMode = 'fallback';
+    var nets = emergencyNetworks();
+    var pool = [], poolMode = 'none';
+    var passes = [
+        { minKm: EMERGENCY_MIN_KM, maxKm: EMERGENCY_MAX_KM, near: 1.2, mode: 'strict' },
+        { minKm: EMERGENCY_MIN_KM * 0.55, maxKm: EMERGENCY_MAX_KM * 1.45, near: 1.8, mode: 'relaxed' },
+        { minKm: 10, maxKm: 160, near: 3.0, mode: 'fallback' },
+        { minKm: 3, maxKm: 220, near: 6.0, mode: 'wide' },
+        { minKm: 0.5, maxKm: 400, near: 12.0, mode: 'last-resort' }
+    ];
+    for (var p = 0; p < passes.length && !pool.length; p++) {
+        for (var ni = 0; ni < nets.length && !pool.length; ni++) {
+            pool = emergencyCollectCandidates(nets[ni].net, nets[ni].key, emergencyStartCity,
+                passes[p].minKm, passes[p].maxKm, passes[p].near);
+            if (pool.length) poolMode = passes[p].mode + ':' + nets[ni].key;
+        }
     }
     pool.sort(function (a, b) { return a.score - b.score; });
     var top = pool.slice(0, Math.max(EMERGENCY_COUNT * 8, 24));
@@ -3595,9 +3612,10 @@ function selectEmergencyRoutes() {
     var used = {};
     for (var r = 0; r < top.length && emergencyRoutes.length < EMERGENCY_COUNT; r++) {
         var cand = top[r];
-        if (used[cand.ci]) continue;
-        used[cand.ci] = true;
-        var route = emergencyChainAt(sec, cand.ci);
+        var usedKey = cand.netKey + ':' + cand.ci;
+        if (used[usedKey]) continue;
+        used[usedKey] = true;
+        var route = emergencyChainAt(cand.net, cand.ci);
         if (cand.reverse) route.reverse();
         var len = route.length ? route[route.length - 1].d - route[0].d : 0;
         if (len <= 0) continue;
@@ -3623,6 +3641,7 @@ function selectEmergencyRoutes() {
         } : null,
         poolMode: poolMode,
         candidates: pool.length,
+        networks: nets.map(function (n) { return { key: n.key, chains: n.net.cnts.length }; }),
         routes: emergencyRoutes.map(function (r) { return { km: +r.lenKm.toFixed(1), nearKm: +r.nearKm.toFixed(1) }; })
     };
 }