Blender Shape Keys and Sparse Accessors

[bentoboxlimited]

Good afternoon -

I was hopeful someone might be able to save me a bit of time going through the python code for the blender glTF exporter. In a blender file that contains active shape keys, I expected to see the data exported into a sparse accessor, but no sparse accessors are present. I suspect the shape keys are being exported into the animations instead, but I am still working on verifying that.

Is this the expected behavior? That is, we should expect to find the shape keys as animation data, and not in a sparse accessor?

Thanks in advance.

[donmccurdy]

Blender currently exports each shape key / morph target attribute as an accessor, but not a “sparse” accessor in glTF terminology – it will contain zeros for vertices unaffected by the shape key. Animations would only be included for keyframes to drive the shape key weights, if keyframes are present.

[bentoboxlimited]

Thank you. Huge help saved me tons of time.