From c22083423114fbcb3af47c543569b655cb71f8d4 Mon Sep 17 00:00:00 2001
From: quaK <38787176+Joelrau@users.noreply.github.com>
Date: Sat, 20 May 2023 17:11:32 +0300
Subject: [PATCH] Restore cg_thirdperson

---
 src/client/component/thirdperson.cpp | 84 ++++++++++++++++++++++++++++
 src/client/game/structs.hpp          | 62 +++++++++++++++++---
 2 files changed, 139 insertions(+), 7 deletions(-)
 create mode 100644 src/client/component/thirdperson.cpp

diff --git a/src/client/component/thirdperson.cpp b/src/client/component/thirdperson.cpp
new file mode 100644
index 00000000..c6573f48
--- /dev/null
+++ b/src/client/component/thirdperson.cpp
@@ -0,0 +1,84 @@
+#include <std_include.hpp>
+#include "loader/component_loader.hpp"
+
+#include "game/game.hpp"
+#include "game/dvars.hpp"
+
+#include "scheduler.hpp"
+
+#include <utils/hook.hpp>
+
+namespace thirdperson
+{
+	namespace
+	{
+		game::dvar_t* cg_thirdPerson = nullptr;
+		game::dvar_t* cg_thirdPersonRange = nullptr;
+		game::dvar_t* cg_thirdPersonAngle = nullptr;
+
+		namespace mp
+		{
+			__int64 sub_1D5950_stub([[maybe_unused]] int local_client_num, game::mp::cg_s* a2)
+			{
+				auto next_snap = a2->nextSnap;
+				if (next_snap->ps.pm_type < 7u)
+				{
+					int link_flags = next_snap->ps.linkFlags;
+					if ((link_flags & 2) == 0 && (next_snap->ps.otherFlags & 4) == 0)
+					{
+						auto client_globals = a2;
+						if (!client_globals->unk2 || !client_globals->unk3)
+						{
+							if (cg_thirdPerson && cg_thirdPerson->current.enabled)
+							{
+								return 1;
+							}
+
+							if (!(link_flags & (1 << 0xE)) || client_globals->unk3)
+								return (link_flags >> 27) & 1;
+							if (link_flags & (1 << 0x1D))
+								return 0;
+							if (!(link_flags & (1 << 0x1C)))
+								return a2->unk1;
+						}
+					}
+				}
+				return 1;
+			}
+
+			void sub_10C280_stub(int local_client_num, float angle, float range, int a4, int a5, int a6, int a7)
+			{
+				angle = cg_thirdPersonAngle->current.value;
+				range = cg_thirdPersonRange->current.value;
+				utils::hook::invoke<void>(0x10C280_b, local_client_num, angle, range, a4, a5, a6, a7);
+			}
+		}
+		
+	}
+
+	class component final : public component_interface
+	{
+	public:
+		void post_unpack() override
+		{
+			if (!game::environment::is_mp())
+			{
+				return;
+			}
+
+			scheduler::once([]()
+			{
+				cg_thirdPerson = dvars::register_bool("cg_thirdPerson", 0, 4, "Use third person view");
+				cg_thirdPersonAngle = dvars::register_float("cg_thirdPersonAngle", 356.0f, -180.0f, 360.0f, 4,
+					"The angle of the camera from the player in third person view");
+				cg_thirdPersonRange = dvars::register_float("cg_thirdPersonRange", 120.0f, 0.0f, 1024, 4,
+					"The range of the camera from the player in third person view");
+			}, scheduler::main);
+
+			utils::hook::jump(0x1D5950_b, mp::sub_1D5950_stub);
+			utils::hook::call(0x10C26B_b, mp::sub_10C280_stub);
+		}
+	};
+}
+
+REGISTER_COMPONENT(thirdperson::component)
diff --git a/src/client/game/structs.hpp b/src/client/game/structs.hpp
index 0ebd5057..c8ec0308 100644
--- a/src/client/game/structs.hpp
+++ b/src/client/game/structs.hpp
@@ -1931,16 +1931,20 @@ namespace game
 		{
 			char __pad0[2];
 			char pm_type; // 2
-			char __pad1[18573];
+			char __pad1[297];
+			float angles[3]; // 300 304 308
+			char __pad2[18264];
 			sessionState_t sessionState;
-			char __pad2[220]; // 254
+			char __pad3[220]; // 254
 			team_t team;
-			char __pad3[30];
+			char __pad4[30];
 			char name[32]; // 18834
-			char __pad4[622];
+			char __pad5[622];
 			int flags; // 19488 
 		}; // size = ?
 
+		static_assert(offsetof(gclient_s, angles) == 300);
+		static_assert(offsetof(gclient_s, sessionState) == 18576);
 		static_assert(offsetof(gclient_s, team) == 18800);
 		static_assert(offsetof(gclient_s, name) == 18834);
 		static_assert(offsetof(gclient_s, flags) == 19488);
@@ -1974,14 +1978,58 @@ namespace game
 
 		struct playerState_s
 		{
-			int clientNum;
-			char __pad0[116];
+			char clientNum;
+			char __pad0[1];
+			char pm_type;
+			char __pad1[44];
+			int otherFlags;
+			char __pad2[28];
+			int pm_time;
+			int pm_flags;
+			int eFlags;
+			int linkFlags;
+			char __pad3[24];
 			vec3_t origin;
 			vec3_t velocity;
-			char __pad1[312];
+			char __pad4[312];
 			int sprintButtonUpRequired;
 		};
 
+		static_assert(offsetof(playerState_s, pm_type) == 2);
+		//static_assert(offsetof(playerState_s, groundEntityNum) == 34);
+		static_assert(offsetof(playerState_s, otherFlags) == 48);
+		static_assert(offsetof(playerState_s, pm_time) == 80);
+		static_assert(offsetof(playerState_s, pm_flags) == 84);
+		static_assert(offsetof(playerState_s, eFlags) == 88);
+		static_assert(offsetof(playerState_s, linkFlags) == 92);
+		static_assert(offsetof(playerState_s, origin) == 120);
+		static_assert(offsetof(playerState_s, velocity) == 132);
+		static_assert(offsetof(playerState_s, sprintButtonUpRequired) == 456);
+
+		struct snapshot_s
+		{
+			playerState_s ps;
+		};
+
+		struct cg_s
+		{
+			char __pad0[18680];
+			snapshot_s* nextSnap;
+			char __pad1[582400];
+			int unk1;
+			int renderingThirdPerson;
+			char __pad2[378580];
+			int unk2;
+			char __pad3[16];
+			int unk3;
+		};
+
+		static_assert(offsetof(cg_s, nextSnap) == 18680);
+		static_assert(offsetof(cg_s, unk1) == 601088);
+		static_assert(offsetof(cg_s, renderingThirdPerson) == 601092);
+		static_assert(offsetof(cg_s, unk2) == 979676);
+		static_assert(offsetof(cg_s, unk3) == 979696);
+
 		struct pmove_t
 		{
 			playerState_s* ps;