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Spine-Starling: placeholder appears although alpha=0

michael_p

Hello,
I have a problem with a Spine animation playing in Starling.
Let's say I have skin "blue_chained", playing animation "chain_break". When this animation ends, I change to skin "blue" and play animation "static".
Right between these two events, I think when animation:"static" of skin:"blue" is loaded, a placeholder and its attachment(it is like a round lightning) becomes visible for a flash, although this particular placeholder has alpha=0 for the specific animation "static".
Why does this happen?
Here is a gif of what happens. You can see the round lightning appear when the chains break. (2 loops)
https://www.dropbox.com/s/fpyhi7jxlq5yn ... h.mov?dl=0

Attached is the source of my spine-starling project.

Thanks in advance.
Michael_p

retropunk

Hi Michael, can I make a suggestion?
Use TexturePacker to create the png and xml and only use the json from Spine for the animation
check out this post and scroll to my last comment
viewtopic.php?f=7&t=3249

Basically use Spine for animation JSON file
Use TexturePacker for PNG and XML output

See if this helps out.

I'd be happy to help you set it up. I would just need your files so i can create the new sprite sheet and export the Spine JSON

Patrick

michael_p

Hi Patrich,
Thank you for your suggestion.
I have done what you described, json from spine, xml + png from Texture Packer. Still I get the error:
at spine.starling::StarlingAtlasAttachmentLoader/newMeshAttachment()[/Users/michaelpantelios/Downloads/spine-runtimes-master/spine-starling/spine-starling/src/spine/starling/StarlingAtlasAttachmentLoader.as:75]

Error: Region not found in Starling atlas: chains/chain_link_v_left (region attachment: chains/chain_link_v_left)

each run time for a different region e.g.

Error: Region not found in Starling atlas: blue/common/blue_shadow (region attachment: blue/common/blue_shadow)
these regions exist in my json, xml files!

I send you attached the spine project that contains all necessary assets.
Again, thank you for your time!
Best,
Michael

Patrick,
I have read thoroughly the thread with the last comment of yours you suggested.
Can you please show me the class where you create the atlas and skeleton ?

Thanks!

retropunk

I will check this out tonight
One thing I noticed is that your output is still using an older version of Spine 1.9.17
The latest update is at 2.0.16.

I'll create a project using TexturePacker and your JSON output and see if i can load your animation.

Patrick

michael_p

Thank you Patrick,
I think you'll need the texture packer's png +xml and the latest Spine export.
Download the attachment.
blueghost.zip
Best,
Michael

retropunk

so when I load up the attached I get random errors like this:
Error: Region not found in Starling atlas: chains/chain_link_h_left (region attachment: chains/chain_link_h_left)
I don't have experience with keeping my assets in nested folders. Do you think it could be the issue?
Having your sprite sheet names like this
chains/
blue/common/
Are not usual for me...

What do you think?

Nate

Sorry I couldn't get to this sooner. The 2.0 release has had me quite busy!

I doubt using a Starling atlas rather than a Spine atlas will make a difference, but it's possible.

Can you try updating to the latest spine-as3 and spine-starling? There have been a number of changes and one of the fixes was related to AttachmentTimeline.

michael_p

Patrick: Thanks a lot for your suggestion, but didn't solve the problem.

Nate: Thanks a lot, but the problem persists. I downloaded the latest zip with spine-starling runtime.
Here is attached my modified example class + my assets.
Problem description:
Step 1. Skin:blue_chained, animation : static appears
Step 2. when you click, animation: chain_break plays for the same skin
Step 3. As soon as previous animation finishes, skin: blue is turned on with animation:static
right at this step, a flash of a thunder-ring appears, while it shouldn't. Strange thing is, these placeholders that contain the thunder parts, all have keys with alpha=0 for both these skins & animations! How can they appear?

Nate

Thanks, I set up your example. This is what happens:

A click occurs, the chain_break animation is set on track 0.
Each frame, AnimationState#apply() applies the chain_break animation to the skeleton, then drawing occurs.
Eventually AnimationState#apply() applies and sees chain_break is complete, so calls onSpineAnimationCompleted.
onSpineAnimationCompleted sets a new skin, set the slots to the setup pose, then sets the static animation.
Drawing occurs. The setup pose has the lightning attachments visible, so the lightning is drawn.
Next frame, AnimationState#apply() applies static which sets the color of the lightning attachments to alpha=0.
Drawing occurs, the lightning can't be seen.

To fix:

skeleton.state.setAnimationByName(0, "static", true);
skeleton.state.apply(skeleton.skeleton); // Apply the animation "static" before drawing occurs.

Note setting alpha=0 isn't a great way to hide attachments because those attachments will still count against your GPU's fill rate. Instead, click the visibility dot in the tree for the attachment then click the key next to the slot. This changes the attachment for the slot to nothing, so nothing is draw and fill rate is spared.

michael_p

Thanks Nate it worked! Yes!
:rofl: :rofl: 8) :rock: :yes:
About the visibility toggle: Unfortunately I can't apply your suggestion in my case because creating a key for visibility of a placeholder, applies for all animations of a certain skin. In my case for example, I need to show the lightning in only one animation, and hide it for the rest. That's why I play with alpha of placeholders.
Still I would value if you have another idea about hiding attachments I don't need for all animations, since improving the app's performance is of course important.

Best,
Michael

Nate

Great! 🙂

Hide the attachments in the setup pose and only show them for the one animation that needs them.

michael_p

Such a simple yet useful feature! Thanks again Nate! You rock!

I guess I answered in a rush.
Sorry Nate, the hide/show trick doesn't work as I would like to, unless I miss something of what you describe (pretty possible)

In setup mode, I click the dot to hide a specific placeholder/attachment
In animation mode, having selected a specific animation, I click on the same dot to show the attachment( don't create a key, but even if I create a key, same things happen afterwards.
The visibility of this attachment applies for all animations !!
what is going on?

Thanks
Michael

Nate

See here:
http://esotericsoftware.com/spine-using ... on-changes
You can call setSlotsToSetupPose (or otherwise write code to hide/show the attachments you want) when you change animations rather than have to key visibility in all animations.

jk12782187

Would it be possible to store the visibility state (visible/invisible) of a slot (or region) per each animation? E.g. I have different states of body parts drawn for different animations. It would be nice if I could toggle their visibility by animation. E.g. the "closed_eyes" slot would only be visible in the "sleep" animation. The "open_eyes" slot would only be visible in the "walk|idle|..." animations. I can do it with a color.alpha keyframe, but that seems a bit hacky. I understand that I can do that in code, but ideally I'd like to keep this stuff "inside spine".

Thx for this great software

Very enjoyable to use!