> Hi all, i am a bit stuck with a program that is running far too fast
Not often I see people complaining there code is too fast...
> Ideally i would like to add buttons that can allow user to speed up
> or slow down the animation from a default 'medium speed' execution
>
> The flow breaks down to this:
>
> //start button callback calls 'UpdateWorld()'to begin
> algorithm then its
>
> #include<string>
> #include<vector>
> #include "fluidUI.h"
> #include "Life.h"
>
> void UpdateWorld()
> {
> while(running)
> {
> //code to examine each cell and determine its status
> //
> //
> Fl::check();
> if(running) //button callback controls bool member
> DrawWorld(); //step through arrays drawing live cells or not
> //includes call to
> cellGrp->redraw()before returns
> }
> }
I think that in this case, calling ::check() from within your game loop
is not helpful, it makes it too hard to vary things.
I'd suggest that you pass control fully over to fltk then use the timers
to update your game loop. Dodgy psuedo code follows...
--------------------------------
double rate = 0.1;
Static void game_update(void*)
{
if(running)
{
DrawWorld();
Fl::repeat_timeout(rate, game_update);
}
} // end game_update
int main(....)
{
// set up stuff
// add buttons / spinner to control refresh rate
Fl::add_timeout(rate, game_update);
return Fl::run();
} // end main
--------------------------------
In this way, changing the value stored in rate will vary how often the
DrawWorld() function is called, and hence control the speed of the game.
It also means that the rest of the GUI will remain responsive (for the
most part) since Fl::run() will handle the GUI events processing and so
forth without you having to pump Fl::check() all the time.
SELEX Galileo Ltd
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