urho3d/Urho3D — pull request #390 by ninjastone (2014-06-18 16:54:24+00:00)
Title: Meshless model was sometimes not importable

assimp generates skeleton mesh at root node using SkeletonMeshBuilder class when importing meshless model. However during this process, child nodes that overlaps with their parent nodes were not considered as bone. This caused "multiple root nodes are not supported" error in CollectBones function.

I modified conditions in CollectBones bit to handle meshless model.