Perfect No Spread source code

DWORD _BG_GetWeaponDef = 0x00529FF0;
DWORD _BG_GetSpreadForWeapon = 0x0047DE70;
DWORD _CG_GetPlayerViewOrigin = 0x004E7470;
DWORD _GetSpreadEndVec = 0x007FC040;
DWORD clients = 0x00E67C80; // clientActive_t struct
int* currentCmdNum = 0x00EABEE8;

int GetCurrentWeapon()
{
    return *(short*)((int)cgArray + 263836 + 324); // "Player is holding" string
}

int BG_GetWeaponDef(int weapon)
{
    DWORD result = 0;
    __asm
    {
        push weapon
        _BG_GetWeaponDef
        mov result,eax
        add esp,04h
    }
    return result;
}

void BG_GetSpreadForWeapon(int playerStatePtr, int weaponDefPtr, float* minSpreadOut, float* maxSpreadOut)
{
    // WARNING: Use _fxsave and _fxrstor if your XMM
    // registers screw up
    __asm
    {
        push maxSpreadOut
        push minSpreadOut
        push weaponDefPtr
        push playerStatePtr
        call _BG_GetSpreadForWeapon
        add esp,10h
    }
}

int CG_GetPlayerViewOrigin(int localClientNum, int playerStatePtr, pvec3_t vecOut)
{
    DWORD result = 0;
    __asm
    {
        push vecOut
        push playerStatePtr
        push localClientNum
        call _CG_GetPlayerViewOrigin
        mov result,eax
        add esp,0Ch
    }
    return result;
}

void GetSpreadEndVec(pvec3_t viewOrigin, pvec3_t spreadEndVecOut, float spread, int commandTime, pvec3_t spreadDirectionOut, pvec3_t forward, pvec3_t right, pvec3_t up, float range)
{
    __asm
    {
        push range
        push up
        push right
        push forward
        push spreadDirectionOut
        push commandTime
        movss xmm0,spread
        mov esi,spreadEndVecOut
        mov edi,viewOrigin
        call _GetSpreadEndVec
        add esp,18h
    }
}

usercmd_s* CL_GetUserCmd(int cmdNum)
{
    return (usercmd_s*)((int)clients + 272488 + sizeof(usercmd_s) * (cmdNum & 0x7F));
}

int CL_GetCurrentCmdNumber()
{
    return *currentCmdNum;
}

void NoSpread()
{
    // get playerState_s struct
    int playerStatePtr = (int)cgArray + 263836;

    // get weaponDef struct and our starting spread float value
    float spread;
    int weaponDefPtr = BG_GetWeaponDef(GetCurrentWeapon());
    spread = *(float*)((int)cgArray + 457488) / 255.0f;

    // get final spread float value
    float minSpread, maxSpread;
    BG_GetSpreadForWeapon(playerStatePtr, weaponDefPtr, &minSpread, &maxSpread);
    if (*(float*)(playerStatePtr + 360) == 1.0f) // if (fWeaponPosFrac == 1.0f) get minSpread from weaponDef
        spread = *(float*)(weaponDefPtr + 1736) + ((maxSpread - *(float*)(weaponDefPtr + 1736)) * spread);
    else
        spread = minSpread + ((maxSpread - minSpread) * spread);

    // get our view origin
    vec3_t viewOrigin;
    if (!CG_GetPlayerViewOrigin(0, playerStatePtr, viewOrigin))
        return;

    // get our view axis
    vec3_t viewAngles;
    vec3_t viewAxis[3];
    if (*(int*)((int)cgArray + 263832)) // renderingThirdPerson
    {
        AngleVectors((float*)((int)cgArray + 390792 + sizeof(clientInfo_t) * cgArray->clientNum), viewAxis[0], viewAxis[1], viewAxis[2]);
    }
    else
    {
        viewAngles[0] = *(float*)((int)cgArray + 389012);
        viewAngles[1] = *(float*)((int)cgArray + 389016);
        viewAngles[2] = 0;
        AngleVectors(viewAngles, viewAxis[0], viewAxis[1], viewAxis[2]);
    }

    // get the range
    float range;
    if (*(int*)(weaponDefPtr + 32) == 3) // if (weapClass == WEAPCLASS_SPREAD)
        range = *(float*)(weaponDefPtr + 1964); // range = fMinDamageRange; (probably for shotguns)
    else
        range = 8192.0f; // from bulletrange dvar

    // NOTE: you can't do 100% no spread with shotguns, because you can only fix 1 bullet at a time

    // get the end vector in the game world of the spread and the direction vector too
    // we use the direction vector directly instead of the end vector
    vec3_t spreadEndVec;
    vec3_t spreadDirection;
    GetSpreadEndVec(viewOrigin, spreadEndVec, spread, *(int*)playerStatePtr, spreadDirection, viewAxis[0], viewAxis[1], viewAxis[2], range);
    
    // convert the spread direction to angles
    vectoangles(spreadDirection, viewAngles);
    
    // fix our angles
    usercmd_s* oldcmd = CL_GetUserCmd(CL_GetCurrentCmdNumber() - 1);

    // get the angle delta and write it to the user cmd
    // do -= because we want to get the inverse of the spread
    oldcmd->angles[0] -= ANGLE2SHORT(-(*(float*)((int)cgArray + 389012) - viewAngles[0]));
    oldcmd->angles[1] -= ANGLE2SHORT(-(*(float*)((int)cgArray + 389016) - viewAngles[1]));

    oldcmd->serverTime += 1;
}