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  • Losslessly exporting to JSON and back?

    anglais
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I'm trying to do some mass changes to all the .spine files in our project, and it seems like the only option for doing this in an automated way, is to export a file to .json, operate on it, and then re-import the .json back to a new .spine file. But for an initial test, I decided to see what would happen if I exported to a .json and re-imported to a .spine without touching the .json file at all; just a straight export-reimport.

When doing this, the .spine file goes from 295 KB to 179 KB, which is already worrying... and, when I re-export the result to .json again, so that I can diff the changes, it's full of strange things like:

  • most of the color values have changed:

  • some attachments have disappeared:

  • many triangles, vertices, and offsets have changed, although I haven't verified yet whether this has any effect; I'm having an animator check the result now.

The export settings file that I'm using has nonessential set to true, and cleanUp set to false, and none of the skeletons in this example file are set not to export, so what could account for all of these changes after passing through the .json format?

The JSON format does not store all of the data in the Spine project file. You'll lose some nonessential things like recent paths, bone icons, etc but the resulting skeleton should be functionality the same. You will lose skeletons, skins, attachments, and animations that have Export unchecked (related to your other thread). Meshes may be retriangulated for some reason, though I'm not sure if that is necessary.

Some colors of objects used only for display are preserved, like bounding boxes. Others are not, like bone colors. We should write the bone colors as "nonessential data". If you find other nonessential data that you want preserved that isn't, please let us know.

If you find you lose something you think you shouldn't, please let us know. We may need the Spine project file to be able to see the data loss.

5 jours plus tard

Ahhh, ok, thank you! I guess that's fine then, if the transformation isn't expected to be totally unchanged. I'll try again with the force export setting at some later time, thank you!