Re: Scripting

[Christian Reiniger <creinig@mayn.de>]

On Wednesday 2002-04-17 19:06, Steve Baker wrote:

> Ingo Ruhnke wrote:
> > Isn't it much easier in such situations to do it in an event driven
> > way:
> >
> > light_switch = make_light_switch(...)
> >
> > # Define a function that should be started when someone hits the
> > light # switch
> > def on_lightswitch_press ():
> >      toggle ( switch_graphic )
> >      toggle ( lightbulb_graphic )
> >      ...
> >
> > # Register the function for the on_press event of the light_switch
> > light_switch.on_press = on_lightswitch_press
>
> Well, that doesn't reproduce what my switch does - which is to make
> it impossible to turn the light switch off for ten seconds after you
> turned it on...but in any case, this was just a silly example - real
> scripts get much more complex.

def on_lightswitch_press ():
    if (last_pressed < (now - 10 sec))
        toggle (switch_graphic)
        toggle (lighbulb_graphic)
        last_pressed = now
...

> You *can* turn any simple program into a state machine and vice-versa
> (you can prove that with math) - but it gets increasingly hard to get
> your head around the resulting code as you have more ongoing activities
> for your game object.

Note that Ingo is *not* talking about a state machine but about 
event-driven code!

-- 
Christian Reiniger
LGDC Webmaster (http://lgdc.sunsite.dk/)

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