From 50b431a92b2d8b34dd53122d59ac6b59a7507641 Mon Sep 17 00:00:00 2001
From: ragnarok-clanker <ragnarok-clanker>
Date: Sat, 31 Oct 2026 09:56:31 +0000
Subject: [PATCH] Decompile fn_19570 (CNavigationManager::CheckArrival)

Batch #7464 by eAthena: 0 byte-identical, 1 confirmed by peer review.

- fn_19570 CNavigationManager::CheckArrival: logic confirmed by peer review

Peer-reviewed-by: secret, meitogi, Toshiro
Accepted without human review: peers confirmed the logic ("same" ahead by at least 3, with 70% of the votes).
---
 Source/Contents/NavigationManager.h  |  1 +
 Source/Contents/NavigationSource.cpp | 19 ++++++++++++++++++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/Source/Contents/NavigationManager.h b/Source/Contents/NavigationManager.h
index baea96ea6..eeb5d7e7c 100644
--- a/Source/Contents/NavigationManager.h
+++ b/Source/Contents/NavigationManager.h
@@ -362,6 +362,7 @@ public:
   void SelectTarget(int nodeIndex);
   void CancelRoute();
   void DrawRoute(const float* matrix);
+  void CheckArrival(int cellX, int cellY);
 
   /* 0000 */ CNaviData data;
   /* 004C */ CPathFinder pathFinder;
diff --git a/Source/Contents/NavigationSource.cpp b/Source/Contents/NavigationSource.cpp
index 504d4a93e..db416eeac 100644
--- a/Source/Contents/NavigationSource.cpp
+++ b/Source/Contents/NavigationSource.cpp
@@ -2,7 +2,7 @@
 #include "Client/Session.h"
 #include "Resource/ResourceMgr.h"
 #include "Utility/Text/FormatString.h"
-
+#include "UI/Window/UINavigationWnd.h"
 #include <cstdint>
 #include <cstdio>
 #include <cstdlib>
@@ -805,3 +805,20 @@ void CNavigationManager::ResetCurrentTarget() {
   this->LoadTargetPreview();
   this->ClearRouteNodes();
 }
+
+// OFFSET: 0x00B94E90
+// FUNCTION: fn_19570
+void CNavigationManager::CheckArrival(int cellX, int cellY) {
+  if (this->unknown_1258 == 2) {
+    if (g_navigationWindow != nullptr) {
+      g_navigationWindow->Invalidate();
+    }
+    if (this->unknown_115C) {
+      NaviCell cell;
+      this->data.GetCell(&cell);
+      if (std::abs(cell.x - cellX) <= 5 && std::abs(cell.y - cellY) <= 5) {
+        this->CancelRoute();
+      }
+    }
+  }
+}