#include <Windows.h>

#define STR_MERGE_IMPL(a, b) a##b
#define STR_MERGE(a, b) STR_MERGE_IMPL(a, b)
#define MAKE_PAD(size) STR_MERGE(_pad, __COUNTER__)[size]
#define DEFINE_MEMBER_N(type, name, offset) struct {unsigned char MAKE_PAD(offset); type name;}

struct vec3 {
	float x, y, z;

	// overload operators
	vec3 operator+(vec3 d) {
		return { this->x + d.x , this->y + d.y, this->z + d.z };
	}
	vec3 operator-(vec3 d) {
		return { this->x - d.x , this->y - d.y, this->z - d.z };
	}
	vec3 operator*(float d) {
		return { this->x * d, this->y * d, this->z * d };
	}
};

class Ent {
public:
	union {
		DEFINE_MEMBER_N(int, iShotsFired, 0xA380);
		DEFINE_MEMBER_N(vec3, aimPunchAngle, 0x302C);
	};
};

// offsets
DWORD dwLocalPlayer = 0xD29B1C;
DWORD dwClientState = 0x588D9C;
DWORD dwClientState_ViewAngles = 0x4D88;

// settings
DWORD uninjectKey = VK_ESCAPE; // key to uninject dll
float rcsAmnt = 2; // 0 <-> 2

DWORD WINAPI HackThread(HMODULE hModule) { // main thread
	uintptr_t engineModule = (uintptr_t)GetModuleHandle(L"engine.dll"); // location of engine module
	uintptr_t clientModule = (uintptr_t)GetModuleHandle(L"client_panorama.dll"); // location of client module
	Ent* localPlayer = *(Ent**)(clientModule + dwLocalPlayer); // localPlayer pointer

	vec3* viewAngles = (vec3*)(*(uintptr_t*)(engineModule + dwClientState) + dwClientState_ViewAngles); // pointer to our view angles

	vec3 oPunch{ 0, 0, 0 }; // old Punch

	while (!GetAsyncKeyState(uninjectKey)) { // loop until we click key and then end
		vec3 punchAngle = localPlayer->aimPunchAngle * 2; // get frozen punch angle not changing

		if (localPlayer->iShotsFired > 1) { // if were currently shooting our gun
			vec3 newAngle = *viewAngles + oPunch - punchAngle; // current angles + last Punch - thisPunch

			while (newAngle.y > 180)  { newAngle.y -=    360; } // normalize horiz
			while (newAngle.y < -180) { newAngle.y +=    360; } // ^
			if (newAngle.x > 89.0f)   { newAngle.x  =  89.0f; } // normalize vert
			if (newAngle.x < -89.0f)  { newAngle.x  = -89.0f; } // ^

			*viewAngles = newAngle; // set our view angles to new angle
		}

		oPunch = punchAngle; // set our last punch to this punch
	}

	FreeLibraryAndExitThread(hModule, 0); // free dll if we exit
	return 0;
}

BOOL APIENTRY DllMain(HMODULE hModule, DWORD reason, LPVOID lpReserved) {
	if (reason == DLL_PROCESS_ATTACH)
		CreateThread(nullptr, 0, (LPTHREAD_START_ROUTINE)HackThread, hModule, 0, nullptr); // create our thread if we attach
	return TRUE;
}