Update town.js

2025-08-17 20:23:14 +00:00
parent 87b0675e6d
commit 875dcbb926
1 changed files with 4 additions and 3 deletions
--- a/town.js
+++ b/town.js
@@ -54,9 +54,10 @@
    // Compute Sea from x,y
    // -----------------------------
    function computeSea(x, y) {
-        const seaY = Math.floor(y / 100);
-        const seaX = Math.floor(x / 100);
-        return seaY * 10 + seaX;
+        if (typeof x !== 'number' || typeof y !== 'number') return null;
+        const sx = Math.floor(x / 100); // col (0-based)
+        const sy = Math.floor(y / 100); // row (0-based)
+        return sx * 10 + sy;
    }

    // -----------------------------