Open enzyme69 opened 5 years ago
Kind of related, but I tested a couple of BVH mocap armature into Blender and then trying to export and getting all kind of weird USDZ animation...
The issue seems like the Armature is all just a separate bones, and seems like Apple usdzconvert and GLTF2USD also cannot handle such hierarchy...
BLEND Blender 2.80 BVHRunner_005.blend.zip
Wondering if this is something that can be fixed?
As GLTF this works: ManyAnim.zip
But when converted to USDZ, it failed...
It's just 2 box object animated for 10 frames.
I provide the blend, usda, gltf, fbx --- none of them works... only 1 object animating >< boxanim.zip
This one actually works... parented all objects into an empty called ROOT. It's weird. I think I've done something similar in the past (?) with eyeballs animation.
I tried with my Torus, with root parent... still does not work. It does not make sense...
My feeling is that somewhat "only 1 animation" possible under 1 action take. Sometimes with the right "hack" multiple objects can work.
I tested with Sketchfab and very often only 1 animated object works... unless ...
My quick solution so far is to bring all those animated objects into SKETCHFAB, and then redownloading the gltf...
https://sketchfab.com/3d-models/hundred-torus-procedural-animation-fd8c3e9676944d9c8faf973d47898f39
It's weird but works. Someone at Apple, working on usdzconvert need to investigate this.
Twitter Thread: https://twitter.com/jimmygunawanapp/status/1156732937565429767?s=20
I am still wondering what Sketchfab did when converting BLEND into GLTF that works with the converter...! BIG MYSTERY.
From Ash, one solution is to export as DAE, import back into Blender, export as GLTF. Then it works. Strange?
The answer might lie in "keyframing" everything, every channel properties and attributes of the objects, so they are all "identical" ...
I have spheres and cones that were constrained into bones (BVH mocap animation), which I then baked, so I have like 100+ animated objects.
As GLTF, I can see them animating when I use gltf viewer (online). However converting them into USDZ and I am getting just a static result. Wondering why?
If using Apple's own usdzconvert tool, usually Armature + Mesh works fine, but in this case, 100+ animated objects are not good.