Getting current frame of animation through scheduler

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Getting current frame of animation through scheduler

(8 posts) (5 voices)

Started 1 year ago by nasty_jpp
Latest reply from ckserious

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nasty_jpp
Member

Hey!

Is it possible to get the name of the current frame of an animated sprite?

Suppose I have this code for a 10 frame animation that I assign to a sprite:

CCSpriteFrameCache * cache = [CCSpriteFrameCache sharedSpriteFrameCache];
[cache addSpriteFramesWithFile:@"walk.plist"];

CCAnimation * animationWalk = [[CCAnimation alloc] initWithName:@"walk" delay:1/10.0];

	for ( int i=1; i <= 10; ++i )
	{
		NSString * fname = [NSString stringWithFormat:@"walk%02i.png", i];
		[animationIdle addFrame:[cache spriteFrameByName: fname]];
	}

self.mySprite = [CCSprite spriteWithSpriteFrameName:@"walk01.png"];
id walkAction = [CCRepeatForever actionWithAction:[CCAnimate actionWithAnimation:animationWalk]];
[self.mySprite runAction:walkAction];
[self addChild:mySprite];

[self schedule:@selector(MyMethod:) interval:1/10];

Would there be a way for me to determine the name of the current frame (i.e. image) in "MyFunction"?

-(void) GameLoop:(ccTime)dt {
	//Current frame of MySprite's animation is... walk01.png? walk02.png..? ...Which one is it???
}

Thanks!

Posted 1 year ago #

Eko Mirhard
Member

Hi, i haven't test it yet... but i think i got a solution for you. First, check out the source for CCAnimate update method inside CCIntervalAction. You will see that CCAnimate class use that method to set what frame should be displayed. You can use the variable "idx", as that variable indicates the current index of the array of animation frame being displayed. Perhaps you will have to subclass CCSprite to store this index, so that you can access it in your GameLoop method.

CMIIW

Regards,
Eko Mirhard

Posted 1 year ago #
nasty_jpp
Member

Hey!

Didn't see that someone had written something. I'm quite glad you did. Thanx!

I'll try to have a look at what you offered as a solution. Though I feel that I might not have the best approach for my problem. You see I'm trying to animate a character for my game. That caracter is made out of two separate sprites, one for the body and one for the head. Both body and head animate as I was hoping.

Problem is that the head needs to be at a certain point each time the body animation frame changes. What I've done so far (described above) doesn't work and there're out of synch. I can't figure out a way to make them in perfect synch.

Would there be an easier way?

Thanx again!

Posted 1 year ago #
Eko Mirhard
Member

If you want a "perfectly" synch'ed animation involving 2 or more sprites, i suggest to create a class based on CCAnimate. That is, by using "update" method called in an interval, you change all your sprites' displayedFrame. By updating the current displayedFrame altogether inside that method, surely it will be synch'ed. Since they are in the same method, you can now set whatever you want with one sprite according to the other sprite's current displayed frame :)

Posted 1 year ago #
timTheMystic
Member

You can also directly set the frame index if you use a NSTimer to run the animation.

[aSprite setDisplayFrame:@"animName" index:frameNum];

Posted 1 year ago #
nasty_jpp
Member

@timTheMystic

That's what i've done and it works like a charm. Thanx for the tip!

Posted 1 year ago #

bigitec
Member

A function that works for me:

-(int)frameOfAnimation:(CCAnimation*)animation {
	CCTexture2D *tex = [sprite displayedFrame].texture;
	CGRect rect = [sprite displayedFrame].rect;

	int imageIndex = 0;
	for (int i=0; i<[animation.frames count]; i++) {
		CCSpriteFrame *frame = [[animation frames] objectAtIndex:i];
		CCTexture2D *tex2 = frame.texture;
		CGRect rect2 = frame.rect;
		if ([tex isEqual:tex2] && CGRectEqualToRect(rect, rect2)) {
			imageIndex = i;
			break;
		}
	}

	return imageIndex;
}

Posted 4 months ago #

ckserious
Member

@bigitec thanks! Very useful script

Posted 2 months ago #

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