pathways: four directions lead to four distinct photos - dedupe per-photo next ids in exit generation (server), exclude other directions' targets from placement candidates (client)

1 files changed, 10 insertions, 2 deletions

diff --git a/server.mjs b/server.mjs
index 6659426..b73c44e 100644
--- a/server.mjs
+++ b/server.mjs
@@ -119,6 +119,7 @@ async function load() {
     const chosen = own.slice(0, 4)
     while (chosen.length < 4) chosen.push(library)
     const used = new Map()
+    const usedNext = new Set()
     const list = []
     for (let i = 0; i < 4; i++) {
       const p = chosen[i]
@@ -129,11 +130,18 @@ async function load() {
       const start = (idx + 1 + step) % cyc.length
       const walk = []
       for (let k = 0; k < 60 && walk.length < cyc.length; k++) walk.push(cyc[(start + k) % cyc.length])
+      let nextId = cyc[start]
+      for (const wid of walk) {
+        if (wid !== pid && !usedNext.has(wid)) { nextId = wid; break }
+      }
+      usedNext.add(nextId)
+      const wi = walk.indexOf(nextId)
+      const rot = wi > 0 ? walk.slice(wi).concat(walk.slice(0, wi)) : walk
       list.push({
         dir: DIRS[i],
         path: { type: p.type, name: p.name, count: p.count },
-        nextId: cyc[start],
-        walk,
+        nextId,
+        walk: rot,
       })
     }
     exits.set(pid, list)