KHR_draco_mesh_compression not supported and thus some validation checks are not done inside draco-encoded meshes

[hybridherbst]

It seems that some checks do not run when a mesh is draco-compressed, resulting in incorrect validation (the file passes validation despite not being valid).

Related

• Cannot validate an extension as it is not supported by the validator: 'KHR_draco_mesh_compression'.  #161
• About the next release #199 (comment)

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1. File with draco-compressed meshes displays as valid (no errors) as the validator isn't able to check any of the mesh data:
   TrongCom Website.zip
   The missing draco extension support is a warning ("KHR_draco_mesh_compression not supported") but easily overlooked.

2. Same file but without draco compression correctly shows errors with skin weights and bone indices (ACCESSOR_JOINTS_INDEX_OOB, ACCESSOR_WEIGHTS_NON_NORMALIZED):
   TrongCom Website.noDraco.zip

Expected would the that errors like ACCESSOR_JOINTS_INDEX_OOB would also be logged for meshes that are draco-compressed.

It would be great if the validator would support draco as well to avoid errors such as this!