cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   bmalcolm
   Member

   Hello,

   I need to implement a game clock for tracking sprites entering stage on a scheduled interval. The game is a race to the finish line where a HUD game clock will increment every second (don't care about fractional seconds). Ex. The game clock displays "0:00" at start and say, "2:41" at finish line.

   My question: I have a SEL that triggers every framebuffer to redraw the scene. What is the best way to process the delta time on the selector? Should I store a global variable where I add the delta time to it and when it values to >= 1 second advance the display clock 1 second?

   Posted 2 years ago #
2. 

   Joao Caxaria
   Member

   why not another selector that runs once every second?
   Or you could just accumulate the delta time from that selector to a variable and divide by 1000 (if the delta time is ms, of course), getting the seconds in the result.

   but another selector for the seconds seems cleaner :)

   Posted 2 years ago #
3. 

   sserye
   Member

   Could you please post some code for reference?

   Posted 2 years ago #
4. 

   natanavra
   Member

   "Could you please post some code for reference? "

   You could do something like this:

   - (id) init{
      //Bla bla bla
      [self schedule:(timeCount:) interval:1.0];
      [self schedule:(gameLoop:)];
      return self;
   }
   
   - (void)timeCount:(ccTime)delta {
      //Count time, will get called every second.
      counter += delta;
   }
   
   - (void)gameLoop:(ccTime)delta {
      //Do stuff for your game.
   }

   This should do...

   Although you could do this:

   - (void)gameLoop:(ccTime)delta{
      counter += delta;
   }

   And this would count time but with milliseconds, as display I usually do this:

   int intTime = (int)counter;

   This would display time in seconds, that's how I use it.

   Posted 2 years ago #
5. 

   shivaz
   Member

   @natanavra. I think you might mean:

   - (id) init{
   //Bla bla bla
   [self schedule: @selector(timeCount:) interval:1.0];
   [self schedule: @selector(gameLoop:)];
   return self;
   }

   Justin

   Posted 2 years ago #

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