Added actual file

src/client/component/gameplay.cpp

@@ -0,0 +1,72 @@
+#include <std_include.hpp>
+#include "loader/component_loader.hpp"
+
+#include "game/game.hpp"
+#include "game/dvars.hpp"
+
+#include <utils/hook.hpp>
+
+namespace gameplay
+{
+	namespace
+	{
+		utils::hook::detour pm_player_trace_hook;
+
+		void pm_player_trace_stub(game::pmove_t* pm, game::trace_t* trace, const float* f3,
+			const float* f4, const game::Bounds* bounds, int a6, int a7)
+		{
+			pm_player_trace_hook.invoke<void>(pm, trace, f3, f4, bounds, a6, a7);
+
+			// By setting startsolid to false we allow the player to clip through solid objects above their head
+			if (dvars::g_enableElevators->current.enabled)
+			{
+				trace->startsolid = false;
+			}
+		}
+
+		void pm_trace_stub(utils::hook::assembler& a)
+		{
+			const auto stand = a.newLabel();
+			const auto allsolid = a.newLabel();
+
+			a.call(rsi); // Game code 
+
+			a.push(rax);
+
+			a.mov(rax, qword_ptr(reinterpret_cast<int64_t>(&dvars::g_enableElevators)));
+			a.mov(al, byte_ptr(rax, 0x10));
+			a.cmp(al, 1);
+
+			a.pop(rax);
+
+			a.jz(stand); // Always stand up
+
+			a.cmp(byte_ptr(rsp, 0x89), 0); // Game code trace[0].allsolid == false
+			a.jnz(allsolid);
+
+			a.bind(stand);
+			a.jmp(0x6878CD_b);
+
+			a.bind(allsolid);
+			a.jmp(0x6878D4_b);
+		}
+	}
+
+	class component final : public component_interface
+	{
+	public:
+		void post_unpack() override
+		{
+			dvars::g_enableElevators = dvars::register_bool("g_enableElevators", false,
+				game::DvarFlags::DVAR_FLAG_NONE, true);
+
+			// Influence PM_JitterPoint code flow so the trace->startsolid checks are 'ignored' 
+			pm_player_trace_hook.create(0x068F0A0_b, &pm_player_trace_stub);
+
+			// If g_enableElevators is 1 the 'ducked' flag will always be removed from the player state
+			utils::hook::jump(0x6878C1_b, utils::hook::assemble(pm_trace_stub), true);
+		}
+	};
+}
+
+REGISTER_COMPONENT(gameplay::component)