cocos2d for iPhone

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

1. 

   debbo
   Member

   Hi

   I have an array of sprites.

   I want to do something to each of them.

   Let's say I want each sprite to grow and then shrink, but I do not want the whole array to grow and shrink at the same time

   I want the first sprite to start growing, then 5 seconds later the next sprite should start growing, 5 seconds later the third should start growing.

   As they are all growing, the user can touch them and drag them eventually.

   Here is my problem. When I run my code , all sprites start growing at the same time. I do not want this. I do not want them all to grow together (o:

   My code is below

   Ideas are welcome

   I'm having a ton of fun with this, btw

   Thanks
   Deb

   --------------------------

   Here I call my function, called growGuy, for each sprite

   //Monster Manager, control guy i
   monster = [[NSMutableArray alloc] init];
   for(int i = 0; i <= 10; i++)
   {
   Sprite *blueguy = (Sprite *)[self getChildByTag:i];
   id action = [CallFuncND actionWithTarget:(self) selector:@selector(growGuy:data:) data:(Sprite*)blueguy];
   [blueguy runAction:action];
   }

   ----------------

   Here is my function (greatly simplified)

   -(void) growGuy: (id)sender data:(Sprite*)blueguy {

   NSLog(@"growGuy called ");

   id actionGrow = [ScaleBy actionWithDuration:5 scale: 2];
   id actionShrink = [ScaleTo actionWithDuration: 0.5 scale:0.5f];

   id action = [Sequence actions: [Blink actionWithDuration:2 blinks:5],
   [DelayTime actionWithDuration:3], actionGrow,
   actionShrink,
   nil];

   [blueguy runAction:action];

   }

   Posted 2 years ago #
2. 

   pabloruiz55
   Member

   Hi!
   You could have an scheduler with an interval of 5 seconds (or the time you want them to grow/shrink at). In that function call the action on the sprite at index "i" of the array and then increment the "i" counter.
   So every time the function is called you are running it on the next element of the array. When the counter reaches the quantity of elements in the array you would have to set it to the first one...

   Posted 2 years ago #
3. 

   debbo
   Member

   Well right now, everytime the function is called, I already do run it on the next element, as you suggest. I am already doing that ..? At least I think I am (o:

   I added a 5 second delay after each call (see below). Yet when I run this code below - which has a 5 second delay, and runs on each element, all of the sprites do the same thing, at the same time.

   I am confused, obviously!!

   Thanks!

   monster = [[NSMutableArray alloc] init];
   for(int i = 0; i <= 10; i++)
   {
   Sprite *blueguy = (Sprite *)[self getChildByTag:i];
   id action = [Sequence actions: [CallFuncND actionWithTarget:(self) selector:@selector(growGuy:data:) data:(Sprite*)blueguy]
   , [DelayTime actionWithDuration:5], nil];
   [blueguy runAction:action];
   }

   Posted 2 years ago #
4. 

   pabloruiz55
   Member

   That code will run 10 times at the same time, what you have to do is what i wrote before, put that code in an scheduler call, leaving out the for loop:

   just this:

   Sprite *blueguy = (Sprite *)[self getChildByTag:i];
   id action = [Sequence actions: [CallFuncND actionWithTarget:(self) selector:@selector(growGuy:data:) data:(Sprite*)blueguy]
   , [DelayTime actionWithDuration:5], nil];
   [blueguy runAction:action];

   then after that do a i++; (i should be an instance variable and act as a counter so you should call it different like indexOfSpriteThatShouldAnimate - well maybe this name is a little long :P - )

   So, the scheduled method gets called after 5 seconds, runs the action on one sprite then after 5 seconds it runs the action on the next element, and so on.

   EDIT: Ohh and take out the delay, it will not do anything by putting it at the end of the sequence...

   Posted 2 years ago #
5. 

   debbo
   Member

   You rock

   I seem to be growing my guys, one at a time

   Thanks a ton!

   Posted 2 years ago #
6. 

   pabloruiz55
   Member

   You are welcome!

   Posted 2 years ago #
7. 

   iTouchiLearn
   Member

   This is really baffling to me, especially when you suggest to remove the for loop. Can you please provide a code example?

   Thanks!

   Posted 1 year ago #
8. 

   Benihana
   Member

   He suggests you remove the for loop, because he is running the code on one sprite per five seconds (or whatever you've got your interval set to). So for a more complete snippet:

   -(void) myUpdate:(ccTime)dt {
       Sprite *blueguy = (Sprite *)[guyArray objectAtIndex:i];
       id action = [CallFuncND actionWithTarget:(self) selector:@selector(growGuy:data:) data:(Sprite*)blueguy];
       [blueguy runAction:action];
       i++;
       if (i > [guyArray count])
           i = 0;
   }

   Then schedule this with the interval you want. As Pabloruiz mentions, make sure to rename "i" to something more descriptive and include it in your ivars.

   Posted 1 year ago #
9. 

   iTouchiLearn
   Member

   Thanks Benihana, but I'm still stuck. I put a schedule call to call the function above, but this time it does nothing. Here's what I have:
   

   -(void) spellWordFinish{
   
   	[self schedule:@selector(spellWordLetter:) interval:3.0];
   
   }
   
   -(void)spellWordLetter:(ccTime)dt {
   	[self unschedule:@selector(spellWordLetter:)];
   	int i;
   
   	CCSprite *spellLetter = (CCSprite *)[self getChildByTag:i];
   	id action = [CCCallFuncND actionWithTarget:(self) selector:@selector(growLetter:data:) data:(CCSprite*)spellLetter];
   	[spellLetter runAction:action];
   	i++;
   	if (i > iCount)
   		i = 0;
   
   }
   
   -(void) growLetter: (id)sender data:(CCSprite*)spellLetter {
   
   	id actionGrow = [CCScaleBy actionWithDuration:2 scale: 1.2];
   	id actionShrink = [CCScaleTo actionWithDuration: 0.5 scale:1];
   
   	id action = [CCSequence actions: [CCBlink actionWithDuration:2 blinks:5],
   				 actionGrow,
   				 actionShrink,
   				 nil];
   
   	[spellLetter runAction:action];
   
   }

   Posted 1 year ago #
10. 

    Benihana
    Member

    If you initialize "i" in spellWordLetter, it will be a different value every time, unlike if you add it as an ivar like I suggested. You're also unscheduling spellWordLetter, so it will only fire once.

    These are all things that are relatively easy to troubleshoot. Perhaps you can do some debugging and come back with a more specific question when you have the problem narrowed down.

    Posted 1 year ago #
11. 

    iTouchiLearn
    Member

    Thanks again! Now all I need to know is how to stop the actions:) Thanks for your help.

    Posted 1 year ago #

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