Этот сайт лучше всего просматривать в современном браузере с включённым JavaScript.

Export Mesh without attachment

Ichyro

Hello, I need to export a character with a mesh jacket to Unity. Since I have multiple items that require meshes, is it possible to export a mesh structure without a fixed attachment and then assign the image later in Unity? Thanks

Spinebot

Yes, you can export meshes without specific attachments and assign images later in Unity using linked meshes.

Here's how it works:

In Spine:

Create your first mesh with the initial image
Create a linked mesh from it
Rename the linked mesh so it references a different image

Both the original mesh and all linked meshes share the same vertices, mesh weights, and deform timelines, so they work perfectly for swappable items.

For export:

You need to export the source mesh attachments because linked meshes depend on them
The source meshes will export even if Export is unchecked (though you'll get a warning)
If you don't have images for the source meshes, you can set the Path for your source meshes to any existing image in your project - this ensures a texture region is found at runtime

In Unity:
Once exported, you can swap attachments at runtime using the spine-unity API. You can:

Use attachment.GetRemappedClone to create a clone of an attachment mapped to a different texture (using a UnityEngine.Sprite or AtlasRegion)
Use meshAttachment.GetLinkedMesh to create new linked meshes with different texture sources
Assign these new attachments to slots as needed

This approach is ideal for mix-and-match systems with multiple swappable items like jackets, since all variants share the same mesh structure and animations.

Harald

@Ichyro Spinebot might have misunderstood your use-case a bit, as linked meshes would likely not be very useful here (or I have misunderstood your desired setup).

In general what you would likely want to do is create template Mesh-Attachments which are large enough to accommodate anything that you later replace it at runtime, as described here:
https://esotericsoftware.com/spine-runtime-skins#Creating-attachments

You can have a look at the example scenes Spine Examples/Other Examples/Mix and Match and Mix and Match Equip which come with the spine-unity runtime package. These demonstrate how to replace attachments at runtime with ones created from Unity Sprites.

Ichyro

thanks