[Newbies] Strange bug with Morphic
martinnilsson at email.com
martinnilsson at email.com
Wed Mar 16 15:52:59 UTC 2011
Thank you! The problem is solved, and I think I see clearly why. I will look into background processes later, and for now I'll go with the simple solution. Great!
/Martin Nilsson
> ----- Original Message -----
> From: Bert Freudenberg
> Sent: 03/16/11 04:40 PM
> To: A friendly place to get answers to even the most basic questions about Squeak.
> Subject: Re: [Newbies] Strange bug with Morphic
>
> On 16.03.2011, at 11:33, Martin Nilsson wrote:
>
> > Now, my question is: what magic does this call to Transcript do which causes my game to update correctly
>
> It performs a "world cycle", which causes a redraw.
>
> > , and what message should I send instead to get the same effect, even without a Transcript window open ?
>
> You could write "self world doOneCycleNow". However, this normally hints at a design flaw.
>
> Morphic is an event-driven system. It has a main loop that processes events, then redraws the changed parts of the world.
>
> Since your code does not "return" to the main loop while doing the AI, the UI will not update. The "proper" way would be doing the UI in a background process, which would notify the UI process when done. Then other things could happen in parallel to the AI "thinking".
>
> If you don't care about the world being frozen while the AI is doing its thing, then you don't need a background process, and forcing a world cycle to update the display is fine. Certainly simpler.
>
> - Bert -
>
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