From edd5a4a0669f9f24cb6264d49946719842208054 Mon Sep 17 00:00:00 2001
From: ragnarok-clanker <ragnarok-clanker>
Date: Wed, 28 Oct 2026 23:39:00 +0000
Subject: [PATCH] Decompile fn_17678 (WorldScene::FindActorInCell)

Batch #1912 by eAthena: 0 byte-identical, 1 confirmed by peer review.

- fn_17678 WorldScene::FindActorInCell: logic confirmed by peer review

Accepted without human review: peers confirmed the logic ("same" ahead by at least 3, with 70% of the votes).
---
 Source/Contents/World/WorldProximity.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Source/Contents/World/WorldProximity.cpp b/Source/Contents/World/WorldProximity.cpp
index fe6366e..451c9b1 100644
--- a/Source/Contents/World/WorldProximity.cpp
+++ b/Source/Contents/World/WorldProximity.cpp
@@ -34,6 +34,18 @@ void UpdateWorldProximityNotification(
 }
 
 // OFFSET: 0x00AC8A40
+// FUNCTION: fn_17678
+bool WorldScene::FindActorInCell(const float* position, std::function<bool(std::uint32_t)> predicate) const {
+  const float key = static_cast<float>(this->terrain->width) * position[1] + position[0];
+  const auto found = this->actorCells.find(key);
+
+  if (found == this->actorCells.end()) {
+    return false;
+  }
+
+  const std::list<std::uint32_t>& ids = found->second;
+  return std::find_if(ids.begin(), ids.end(), predicate) != ids.end();
+}
 
 // OFFSET: 0x00ACA180
 // FUNCTION: fn_17689