Get Relative Angle

fixed ThirdPerson_GetRelativeAngle (int player)
{
    fixed yaw = CameraGetYaw(player);
    //fixed face = UnitGetFacing(playerAssets[player].units.avatar);
    fixed up = IntToFixed(MaxI(BoolToInt(playerInput[player].key.state[c_keyW]),BoolToInt(playerInput[player].key.state[c_keyUp])));
    fixed down = IntToFixed(MaxI(BoolToInt(playerInput[player].key.state[c_keyS]),BoolToInt(playerInput[player].key.state[c_keyDown])));
    fixed left = IntToFixed(MaxI(BoolToInt(playerInput[player].key.state[c_keyA]),BoolToInt(playerInput[player].key.state[c_keyLeft])));
    fixed right = IntToFixed(MaxI(BoolToInt(playerInput[player].key.state[c_keyD]),BoolToInt(playerInput[player].key.state[c_keyRight])));
    fixed atan = ATan2(up - down, right - left);
    return (yaw+atan);
}