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  Timer and ticks and should I be shot?  (Read 1296 times)
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Offline K.I.L.E.R

Senior Devvie




Java games rock!


« Posted 2005-01-20 08:52:20 »

I'm posting this here because it's stupid and I should know better considering this is what I was doing back in my 10th grade, hence I need to be shot for stupidity.

Does this code do 30 ticks per second?

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int ticks = 30;
            long start = System.nanoTime();
            //do logic
            if(end >= (1e-9/60) && ticksDone <= ticks){
                  logicLoop(clickLoc, mouseLoc, playerCamera);
                  ticksDone++;
            }
            if(ticksDone == 30)
                  ticksDone = 0;
            end = System.nanoTime() - start;



I've corrected it to this:
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int ticks = 60;
            long start = System.nanoTime();
            double time = 30 / Math.pow((1e-9/1)*10, 9);
           
            if(end <= time && ticksDone <= ticks){
                  logicLoop(clickLoc, mouseLoc, playerCamera);
                  ticksDone++;
            }
           
            if(ticksDone == 30)
                  ticksDone = 0;
           
            end = System.nanoTime() - start;

Vorax:
Is there a name for a "redneck" programmer?

Jeff:
Unemployed. Wink
Offline Ceranith

Senior Newbie





« Reply #1 - Posted 2005-01-21 00:53:16 »

I'm a bit confused. Is this in a loop? I ran it like such anyway, and it doesn't seem to be a controlled loop. It will just call logicLoop() as much as it can, rather than 30 times a second (so I'm guessing I'm doing something wrong).

Sorry if I'm misunderstanding you, if I am, can you be a little clearer of what you want it to do?
Offline K.I.L.E.R

Senior Devvie




Java games rock!


« Reply #2 - Posted 2005-01-21 01:18:15 »

Loop 30 times a second.

Vorax:
Is there a name for a "redneck" programmer?

Jeff:
Unemployed. Wink
Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline Ceranith

Senior Newbie





« Reply #3 - Posted 2005-01-21 01:30:14 »

This is the loop I'm currently using:

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long nextCheck = System.nanoTime() + 1000000000;
int      fpsCount = 0;
int      fps      = 0;

while(true)
{
      nanoTime = System.nanoTime();

      if(nanoTime      >= nextCheck)
      {
            nextCheck =      nanoTime + 1000000000;
            fps      = fpsCount;
            fpsCount = 0;
      }

      fpsCount++;

      tick();      // do stuff      here

      while(System.nanoTime()      < nanoTime + (1000000000 / targetFPS))
      {
            Thread.yield();
      }
}

Where targetFPS would be 30 Smiley
Offline K.I.L.E.R

Senior Devvie




Java games rock!


« Reply #4 - Posted 2005-01-21 02:32:57 »

Thanks.

Vorax:
Is there a name for a "redneck" programmer?

Jeff:
Unemployed. Wink
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