[Kde-games-devel] Re: Kplayer and game logic

[Andreas Beckermann]

On Sunday 31 August 2003 22:58, cantabile wrote:
> Hi again,
> I'm on my way to create a computer player. The inherited class is called
> ComputerPlayer (I'm quite creative for class names :) ) and constructs
> like this:
>
> ComputerPlayer():KGameIO(){};
>
> When I try and create this player

Note that this is not a player, but a player IO only! You will still need a 
KPlayer, which the IO operates on.

> in an initPlayers() method, calling a 
> createIO method I get a program crash with this code :
[...]
>
> Here are the lines where I create a computer player
[...]

Which exactly is line 107 where the crash happens?

Also it seems to me that you call createIO() from your KGame::createPlayer() 
implementation. I don't think this is necessary. Usually you will add players 
like this:

MyPlayer* player = new MyPlayer;
player->setName(i18n("Me"));
KGameMouseIO* io = new KGameMouseIO(...);
connect(io, SIGNAL(...), this, SLOT(...)); // connect mouseevent
player->addGameIO(io);
mKGame->addPlayer(player);

This is of course an example for adding a local (human) player. A computer 
player would be the same, but you replace KGameMouseIO by a different IO.
KGame::createPlayer() will get called when starting a network game - it 
creates the non-local players on other clients. They should not contain a IO 
(as you cannot control a non-local player).

> I noticed, though, that I must cast(1) computer to KPlayer* because

You cast a KGameIO derived class to KPlayer? This must crash as soon as KGame 
tries to access this "KPlayer".

> addPlayer(KGameIO*) isn't available. Would it be the soure of my problem
> here ? Is there another way to add this specific player?

See above - you usually first create the KPlayer (-derived) class, and then 
add you gameIO there.

> Thanks.

CU
Andi