From 71f2a4260fafe71e50257319fdb32579c589d6dd Mon Sep 17 00:00:00 2001
From: xmanrui <841206367@qq.com>
Date: Sun, 1 Mar 2026 12:51:21 +0800
Subject: [PATCH] fix(bugs): prevent single-bug circling behavior

---
 lib/pixel-office/bugs/bugSystem.ts | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/pixel-office/bugs/bugSystem.ts b/lib/pixel-office/bugs/bugSystem.ts
index 90f93e4..1c0c6f7 100644
--- a/lib/pixel-office/bugs/bugSystem.ts
+++ b/lib/pixel-office/bugs/bugSystem.ts
@@ -530,7 +530,11 @@ export class BugSystem {
     const sample = this.pheromones.sampleDirection(bug.x, bug.y, BUG_TRAIL_FOLLOW_RADIUS)
     const enterFollowP = Math.min(1, BUG_TRAIL_FOLLOW_PROB * (dt / 0.016))
     const breakFollowP = Math.min(1, BUG_TRAIL_BREAK_PROB * (dt / 0.016))
-    if (!bug.followingTrail && sample.strength > BUG_PHEROMONE_MIN_DETECT && Math.random() < enterFollowP) {
+    const canFollowTrail = nCount >= 1
+    if (!canFollowTrail) {
+      // Prevent single-bug self-tracking loops (circling around its own pheromone).
+      bug.followingTrail = false
+    } else if (!bug.followingTrail && sample.strength > BUG_PHEROMONE_MIN_DETECT && Math.random() < enterFollowP) {
       bug.followingTrail = true
     } else if (bug.followingTrail && Math.random() < breakFollowP) {
       bug.followingTrail = false
@@ -558,7 +562,7 @@ export class BugSystem {
       }
     }
 
-    if (sample.strength > BUG_PHEROMONE_MIN_DETECT) {
+    if (canFollowTrail && sample.strength > BUG_PHEROMONE_MIN_DETECT) {
       const plen = Math.hypot(sample.x, sample.y)
       if (plen > 0.0001) {
         const followW = bug.followingTrail ? BUG_TRAIL_STEERING_WEIGHT : BUG_PHEROMONE_FOLLOW_WEIGHT