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  • Combining Skins - Additive

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Hello, I am working on creating a system for showing several skins at once and I could use some help. First I'll describe the setup I'm trying to achieve:

We have two base character silhouettes that we want to share one skeleton: a male character and a female character. We also have dozens of outfits that we want to be able to add to each character at runtime. We have a variety of hairstyles we want to be able to add at runtime as well.

This is the setup I am currently trying to create:

  • Create two skins in Spine for the base animations: one for the male character and one for the female character.
  • Create a skin for each outfit in Spine that goes on the same skeleton as the base skins
  • In Unity create a new skin using the character skin as a base and add all the attachments from the outfit skin to the new skin.
  • Use a placeholder slot for the hair that is a child of the head bone and attach the hairstyle sprites at runtime.

Now for the actual question! I'm currently hung up on the third part of the implementation: specifically creating a duplicate of one skin and adding another skin as new attachments on top of it. I have looked for ways to do this but I can't seem to find any. Everything I have found related to combining skins or mix and matching swaps out one image on an attachment for another, but I am looking to create a new skin that is the combination of two entire skins. The biggest issue I've run into is I can't seem to find a way to get all the attachments on a skeleton or a skin. I also can't find a way to see how many attachments are on a skin (otherwise I could just use a simple for loop and use GetAttachment). I could just tell the script how many slot indexes to loop over but if we decided to change the skeletons later then I have to update the code to match.

If anyone knows how to get around those issues or has a suggestion for another setup I can try I would really appreciate it!

Thanks,
Ceraph

It seems like you're describing 2 separate skeletons, with many skins (one for each armor set) - and a single slot that changes for the hair.

I had wanted to avoid needing to duplicate the skeleton (since they will share animations) but talking to the artists this seems like a doable solution. Thanks for the advice! I would still be interested to know how to do the other solution though, if only just to understand the engine better. If anybody knows that would be awesome.

I don't believe the system is structure to handle what you're describing.

You can jerry-rig it -

1 skeleton
2 skins - male/female

Then attach a separate skeleton per armor or weapon slot, then change skins on that 2nd skeleton.

But.... why would you do this to your animators? (Answer: WoW did this to their animators in order to ensure multiple colors of the same shape of red hat could match the animation of the characters)

@Ceraph You're actually doing it better than most users instinctually do it.

Combining two skins, isn't a runtime feature yet but it's definitely coming. I've suggested it before and @Nate thinks it's a good idea.

That said, Skins are pretty much just Dictionaries internally, so combining skins is actually already doable without too much work in code, even without (for now) official support.

I added a copy constructor and a very simple AddFromSkin method in this version of Skin.cs: https://gist.github.com/pharan/919bf0ba88beffc62a51046056171885

This is the new code highlighted: https://gist.github.com/pharan/919bf0ba88beffc62a51046056171885#file-skins-cs-L49-L59

And sample usage would be like this:

void Start () {
     // Get your original skins.
     Spine.Skin guy = skeletonAnimation.skeleton.data.FindSkin("guy");
     Spine.Skin additional = skeletonAnimation.skeleton.data.FindSkin("stuff");

 // Combine them.
 Spine.Skin combined = new Skin("combined", guy); // New copy constructor
 combined.AddFromSkin(additional); // Add items from another skin.
}

Hi,

When you combine skin like that, how are they combined ? Does the second one override the first ones for each slot image it has ?

Thanks

That's up to you. You can change the code however you want.

This version just overwrites attachments if they already existed in the first one.

@Pharan thanks for the script! This looks really useful, I'll have to try it out.

Thanks,
Ceraph

2년 후

The link seems to lead to a missing page 😐

Actually the new link u given me is all I needed. Thanks a lot :yes: !