From e5b9803cb7f828f90e3ce45e22c8a5a5666f662d Mon Sep 17 00:00:00 2001
From: ragnarok-clanker <ragnarok-clanker>
Date: Sat, 31 Oct 2026 18:22:19 +0000
Subject: [PATCH] Decompile fn_21351 (CGameMode::WriteReplaySkillState)

Batch #8495 by youko: 0 byte-identical, 1 confirmed by peer review.

- fn_21351 CGameMode::WriteReplaySkillState: logic confirmed by peer review

Peer-reviewed-by: Yommy, alisonrag, zindokar
Accepted without human review: peers confirmed the logic ("same" ahead by at least 3, with 70% of the votes).
---
 Source/Client/Mode/CGameMode.h  |  1 +
 Source/Client/Mode/GameMode.cpp | 51 +++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+)

diff --git a/Source/Client/Mode/CGameMode.h b/Source/Client/Mode/CGameMode.h
index 838ac5e79..e190721c6 100644
--- a/Source/Client/Mode/CGameMode.h
+++ b/Source/Client/Mode/CGameMode.h
@@ -547,6 +547,7 @@ public:
   bool RecordReplayMessage(int message, int value, int first, int second);
   void UpdateReplayActionSpeeds();
   struct ReplayTime StopReplayRecording();
+  std::vector<unsigned char> WriteReplaySkillState();
   void ReceivePacket0AB8(const unsigned char* packet);
   void ReceivePacket0A29(int value);
   void ReceiveCashShopBanner(int value1, int value2, int value3);
diff --git a/Source/Client/Mode/GameMode.cpp b/Source/Client/Mode/GameMode.cpp
index a30ef02ac..0bd995541 100644
--- a/Source/Client/Mode/GameMode.cpp
+++ b/Source/Client/Mode/GameMode.cpp
@@ -1641,3 +1641,54 @@ void CGameMode::TargetActorByAid(int aid) {
     *reinterpret_cast<int*>(&this->unknown_04F4[0xBC]) = 0;
   }
 }
+
+#include "Contents/Actors/Skill.h"
+
+#pragma pack(push, 1)
+struct SkillEntryPacket {
+  /* 0000 */ std::int16_t packetType;
+  /* 0002 */ std::uint32_t aid;
+  /* 0006 */ std::uint32_t creatorAid;
+  /* 000A */ std::int16_t x;
+  /* 000C */ std::int16_t y;
+  /* 000E */ unsigned char job;
+  /* 000F */ unsigned char isVisible;
+};
+#pragma pack(pop)
+
+static_assert(sizeof(SkillEntryPacket) == 16);
+
+// OFFSET: 0x00CEB4C0
+// FUNCTION: fn_21351
+std::vector<unsigned char> CGameMode::WriteReplaySkillState() {
+  std::vector<unsigned char> output;
+  {
+    const auto record = BuildReplayTaggedRecord(17000, nullptr, 0);
+    output.insert(output.end(), record.begin(), record.end());
+  }
+
+  for (CRenderObject* object : this->scene->unknown_0020) {
+    CSkill* skill = static_cast<CSkill*>(object);
+    SkillEntryPacket packet;
+    packet.packetType = 0x11F;
+    packet.aid = skill->skillAid;
+    packet.creatorAid = static_cast<std::uint32_t>(skill->unknown_0410);
+    packet.job = static_cast<unsigned char>(skill->GetEffectiveJob(-1));
+    packet.isVisible = 1;
+
+    const C3dAttr* terrain = this->scene->terrain;
+    const float column = static_cast<float>(std::floor(static_cast<float>(terrain->width / 2) + skill->render.position.x / static_cast<float>(terrain->cellSize)));
+    const float row = static_cast<float>(std::floor(static_cast<float>(terrain->height / 2) + skill->render.position.z / static_cast<float>(terrain->cellSize)));
+    packet.x = static_cast<std::int16_t>(static_cast<int>(column));
+    packet.y = static_cast<std::int16_t>(static_cast<int>(row));
+
+    const auto record = BuildReplayTaggedRecord(0xCD, &packet, sizeof(packet));
+    output.insert(output.end(), record.begin(), record.end());
+  }
+
+  {
+    const auto record = BuildReplayTaggedRecord(17001, nullptr, 0);
+    output.insert(output.end(), record.begin(), record.end());
+  }
+  return output;
+}