[cocos2d-x] How to jump to a frame in SkeletonAnimation?

timwzw

I wondering how to jump to a frame in a SkeletonAnimation.

gotoAndPlay(frameIdx)

gotoAndStop(frameIdx)

Pharan

SkeletonAnimation::setAnimation returns an spTrackEntry*
https://github.com/EsotericSoftware/spine-runtimes/blob/master/spine-c/include/spine/AnimationState.h#L53

You can set the time on that spTrackEntry immediately after setting the animation and it will jump to that frame.
Note that the time is in seconds, not frames. The conversion is timeInSeconds = frameNumber/30f;

BinaryCats

This is kinda annoying, there seems to be some unpredictable behaviour sometimes, but anyway I recommend pausing(set time scale to 0.0) the track before you, as pharan said, set the time. Then resuming or not..

Pharan

I notice that spTrackEntry also keeps track of lastTime.

Not sure if it's the cause, but you may need to set that to the same value as time. I'm not sure where it might be initialized as 0 if it is at all, but it'll likely fire multiple events (if you have any) if you don't set it to the same time.
Downside to that workaround is that it won't apply attachment swaps (since those work like events now).

BinaryCats

Pharan wrote
I notice that spTrackEntry also keeps track of lastTime.

Not sure if it's the cause, but you may need to set that to the same value as time. I'm not sure where it might be initialized as 0 if it is at all, but it'll likely fire multiple events (if you have any) if you don't set it to the same time.
Downside to that workaround is that it won't apply attachment swaps (since those work like events now).

hmmm interesting, Ill make a note of this and investigate. We use this for loading bars, so not working for attachment swaps is a bummer. Did nate not say he was thinking about changing the system back to how it use to work, or am I imagining things?