Simple CCSprite repeating animation in 0.9 - how?

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Simple CCSprite repeating animation in 0.9 - how?

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Started 2 years ago by vargonian
Latest reply from vargonian

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vargonian
Member

I've recently started using Cocos2d, and I decided to install the 0.9 beta. Unfortunately there is very little how-to documentation for the new API revisions, and I don't have experience with the older versions to use as a frame of reference. I've spend a half a day trying to solve this.

I have a CCSprite, which is part of a CCSpriteSheet (created from CCSpriteSheet::createSpriteWithRect). I can get this working and displayed just fine. But now I want to create a CCAnimation consisting of 2 frames from the CCSpriteSheet, and add this to my CCSprite, and set this as the currently-running animation, repeating forever. (I also want to speed up and slow down this animation at will, but first things first.)

I've created a CCAnimation and added 2 CCSpriteFrames via CCAnimation::addFrameWithTexture:rect, and added this to my CCSprite object. Now I would expect there to be some intuitive method on CCSprite called "setCurrentAnimation" or "setAnimation" or "startAnimation:name" or anything of this sort. I would also expect a way to specify a separate delay for each frame of the animation, and then be able to scale the entire CCAnimation by some factor which would affect all of these. But I don't see any of this.

I see the CCSprite:runAction method and I've fiddled with this for quite a while with no success. I think the key lies here somewhere. Can someone please assist me with some sample code that demonstrates how to accomplish my task? (to reiterate, I just want an endlessly-looping 2-frame animation of a sprite that has a sprite sheet as a basis).

Posted 2 years ago #
albatross
Member

You can see some sample code in the release notes for 0.9 here. Basically just create a CCAnimate action and add it to a CCRepeatForever action, THEN use the runAction function :) I don't have XCode here so I can't really give you any sample code other than that. (don't wanna write any bad code on the top of my head :)).

To set the delay on the animation I guess you can use functions supplied in CCAnimation API.

Posted 2 years ago #
vargonian
Member

Hah okay, I will try this when I get home. I did use the release notes page as a reference, but I think I may have left out a step. I called CCSprite::runAction on my sprite, passing a CCRepeatForever which was initialized with a CCAnimation. This gave a runtime error (something about no target set or something). I will try what you suggested: calling CCSprite::runAction, passing a CCRepeatForever which is initialized with a CCAnimate, which itself is initialized with a CCAnimation. Whew, that's a lot of steps for a simple animation! (But I can see that it's the consequence of such a flexible action system.)

One feature request I'd like to make, which is common with many other sprite animation systems, is to support individual delays *per frame*, rather than assuming that each frame will last the same duration as all the others.

Posted 2 years ago #

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