From 82c914c2fdf14dd9bc99afa0a5c5d047f7fa7130 Mon Sep 17 00:00:00 2001
From: Kawe Mazidjatari <48657826+Mauler125@users.noreply.github.com>
Date: Thu, 19 Jan 2023 22:53:45 +0100
Subject: [PATCH] Detour 'Physics_RunThinkFunctions'

Hook will be used to run simulation for bots.
---
 r5dev/core/init.cpp                   |  5 ++++
 r5dev/game/server/physics_main.cpp    | 28 +++++++++++++++++++++
 r5dev/game/server/physics_main.h      | 36 +++++++++++++++++++++++++++
 r5dev/vproj/dedicated.vcxproj         |  2 ++
 r5dev/vproj/dedicated.vcxproj.filters |  6 +++++
 r5dev/vproj/gamesdk.vcxproj           |  2 ++
 r5dev/vproj/gamesdk.vcxproj.filters   |  6 +++++
 7 files changed, 85 insertions(+)
 create mode 100644 r5dev/game/server/physics_main.cpp
 create mode 100644 r5dev/game/server/physics_main.h

diff --git a/r5dev/core/init.cpp b/r5dev/core/init.cpp
index e5ecea2e..1d5261c8 100644
--- a/r5dev/core/init.cpp
+++ b/r5dev/core/init.cpp
@@ -109,6 +109,7 @@
 #include "game/server/fairfight_impl.h"
 #include "game/server/gameinterface.h"
 #include "game/server/movehelper_server.h"
+#include "game/server/physics_main.h"
 #endif // !CLIENT_DLL
 #ifndef DEDICATED
 #include "game/client/viewrender.h"
@@ -212,6 +213,8 @@ void Systems_Init()
 	Persistence_Attach();
 	IVEngineServer_Attach();
 	CServerGameDLL_Attach();
+
+	Physics_Main_Attach();
 #endif // !CLIENT_DLL
 
 	SQAPI_Attach();
@@ -347,6 +350,8 @@ void Systems_Shutdown()
 	Persistence_Detach();
 	IVEngineServer_Detach();
 	CServerGameDLL_Detach();
+
+	Physics_Main_Detach();
 #endif // !CLIENT_DLL
 	SQAPI_Detach();
 	SQVM_Detach();
diff --git a/r5dev/game/server/physics_main.cpp b/r5dev/game/server/physics_main.cpp
new file mode 100644
index 00000000..0990f820
--- /dev/null
+++ b/r5dev/game/server/physics_main.cpp
@@ -0,0 +1,28 @@
+//====== Copyright © 1996-2005, Valve Corporation, All rights reserved. =======//
+//
+// Purpose: Physics simulation for non-havok/ipion objects
+//
+// $NoKeywords: $
+//=============================================================================//
+#include "core/stdafx.h"
+#include "player.h"
+#include "physics_main.h"
+
+//-----------------------------------------------------------------------------
+// Purpose: Runs the main physics simulation loop against all entities ( except players )
+//-----------------------------------------------------------------------------
+void Physics_RunThinkFunctions(bool bSimulating)
+{
+	v_Physics_RunThinkFunctions(bSimulating);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+void Physics_Main_Attach()
+{
+	DetourAttach(&v_Physics_RunThinkFunctions, &Physics_RunThinkFunctions);
+}
+
+void Physics_Main_Detach()
+{
+	DetourDetach(&v_Physics_RunThinkFunctions, &Physics_RunThinkFunctions);
+}
\ No newline at end of file
diff --git a/r5dev/game/server/physics_main.h b/r5dev/game/server/physics_main.h
new file mode 100644
index 00000000..4499814c
--- /dev/null
+++ b/r5dev/game/server/physics_main.h
@@ -0,0 +1,36 @@
+//====== Copyright © 1996-2005, Valve Corporation, All rights reserved. =======//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+#ifndef PHYSICS_MAIN_H
+#define PHYSICS_MAIN_H
+
+inline CMemory p_Physics_RunThinkFunctions;
+inline auto v_Physics_RunThinkFunctions = p_Physics_RunThinkFunctions.RCast<void (*)(bool bSimulating)>();
+
+void Physics_Main_Attach();
+void Physics_Main_Detach();
+///////////////////////////////////////////////////////////////////////////////
+class VPhysics_Main : public IDetour
+{
+	virtual void GetAdr(void) const
+	{
+		spdlog::debug("| FUN: Physics_RunThinkFunctions            : {:#18x} |\n", p_Physics_RunThinkFunctions.GetPtr());
+		spdlog::debug("+----------------------------------------------------------------+\n");
+	}
+	virtual void GetFun(void) const
+	{
+		p_Physics_RunThinkFunctions = g_GameDll.FindPatternSIMD("88 4C 24 08 55 56 57 41 54 41 55 41 56 41 57 48 81 EC ?? ?? ?? ??");
+		v_Physics_RunThinkFunctions = p_Physics_RunThinkFunctions.RCast<void (*)(bool)>();
+	}
+	virtual void GetVar(void) const { }
+	virtual void GetCon(void) const { }
+	virtual void Attach(void) const { }
+	virtual void Detach(void) const { }
+};
+///////////////////////////////////////////////////////////////////////////////
+
+REGISTER(VPhysics_Main);
+#endif // PHYSICS_MAIN_H
diff --git a/r5dev/vproj/dedicated.vcxproj b/r5dev/vproj/dedicated.vcxproj
index 50c193d3..80690828 100644
--- a/r5dev/vproj/dedicated.vcxproj
+++ b/r5dev/vproj/dedicated.vcxproj
@@ -187,6 +187,7 @@
     <ClInclude Include="..\game\server\gameinterface.h" />
     <ClInclude Include="..\game\server\movehelper_server.h" />
     <ClInclude Include="..\game\server\networkproperty.h" />
+    <ClInclude Include="..\game\server\physics_main.h" />
     <ClInclude Include="..\game\server\player.h" />
     <ClInclude Include="..\game\server\playerlocaldata.h" />
     <ClInclude Include="..\game\shared\animation.h" />
@@ -556,6 +557,7 @@
     <ClCompile Include="..\game\server\gameinterface.cpp" />
     <ClCompile Include="..\game\server\movehelper_server.cpp" />
     <ClCompile Include="..\game\server\networkproperty.cpp" />
+    <ClCompile Include="..\game\server\physics_main.cpp" />
     <ClCompile Include="..\game\server\player.cpp" />
     <ClCompile Include="..\game\shared\animation.cpp" />
     <ClCompile Include="..\game\shared\collisionproperty.cpp" />
diff --git a/r5dev/vproj/dedicated.vcxproj.filters b/r5dev/vproj/dedicated.vcxproj.filters
index a732d08a..de3c3e52 100644
--- a/r5dev/vproj/dedicated.vcxproj.filters
+++ b/r5dev/vproj/dedicated.vcxproj.filters
@@ -1371,6 +1371,9 @@
     <ClInclude Include="..\game\shared\imovehelper.h">
       <Filter>sdk\game\shared</Filter>
     </ClInclude>
+    <ClInclude Include="..\game\server\physics_main.h">
+      <Filter>sdk\game\server</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="..\common\opcodes.cpp">
@@ -1730,6 +1733,9 @@
     <ClCompile Include="..\game\server\movehelper_server.cpp">
       <Filter>sdk\game\server</Filter>
     </ClCompile>
+    <ClCompile Include="..\game\server\physics_main.cpp">
+      <Filter>sdk\game\server</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <None Include="..\Dedicated.def" />
diff --git a/r5dev/vproj/gamesdk.vcxproj b/r5dev/vproj/gamesdk.vcxproj
index 185c64d0..9dd720ef 100644
--- a/r5dev/vproj/gamesdk.vcxproj
+++ b/r5dev/vproj/gamesdk.vcxproj
@@ -72,6 +72,7 @@
     <ClCompile Include="..\game\server\gameinterface.cpp" />
     <ClCompile Include="..\game\server\movehelper_server.cpp" />
     <ClCompile Include="..\game\server\networkproperty.cpp" />
+    <ClCompile Include="..\game\server\physics_main.cpp" />
     <ClCompile Include="..\game\server\player.cpp" />
     <ClCompile Include="..\game\shared\ai_utility_shared.cpp" />
     <ClCompile Include="..\game\shared\animation.cpp" />
@@ -265,6 +266,7 @@
     <ClInclude Include="..\game\server\gameinterface.h" />
     <ClInclude Include="..\game\server\movehelper_server.h" />
     <ClInclude Include="..\game\server\networkproperty.h" />
+    <ClInclude Include="..\game\server\physics_main.h" />
     <ClInclude Include="..\game\server\player.h" />
     <ClInclude Include="..\game\server\playerlocaldata.h" />
     <ClInclude Include="..\game\shared\ai_utility_shared.h" />
diff --git a/r5dev/vproj/gamesdk.vcxproj.filters b/r5dev/vproj/gamesdk.vcxproj.filters
index 9f49ebec..e2ae0704 100644
--- a/r5dev/vproj/gamesdk.vcxproj.filters
+++ b/r5dev/vproj/gamesdk.vcxproj.filters
@@ -717,6 +717,9 @@
     <ClCompile Include="..\game\client\movehelper_client.cpp">
       <Filter>sdk\game\client</Filter>
     </ClCompile>
+    <ClCompile Include="..\game\server\physics_main.cpp">
+      <Filter>sdk\game\server</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\client\cdll_engine_int.h">
@@ -2093,6 +2096,9 @@
     <ClInclude Include="..\game\client\movehelper_client.h">
       <Filter>sdk\game\client</Filter>
     </ClInclude>
+    <ClInclude Include="..\game\server\physics_main.h">
+      <Filter>sdk\game\server</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <Image Include="..\shared\resource\lockedserver.png">