The search for a matching importer had a few issues, see #3791. There were two different mechanisms to determine whether an importer accepts a specific file extension:
1. `aiImporterDesc::mFileExtensions`, which was forwarded to the UI via `BaseImporter::GetExtensionList()`.
2. `BaseImporter::CanRead()` when called with `checkSig == false`, which determines whether to actually use that importer.
Both were redundant and got out of sync repeatedly. I removed 2. completely and replaced it with 1., thereby syncing UI/import and shortening all `BaseImporter::CanRead()` implementations.
Further bugfixes:
- fixed glTF2 importer throwing exceptions when checking whether it can load a file
- removed `BaseImporter::SimpleExtensionCheck()` because it is no longer used and had a bug with case sensitivity
Since the `checkSig` parameter in `BaseImporter::CanRead()` is now useless, it can be removed completely. I’m not sure if this would break ABI compatiblity, so I’ll submit it with a later pull request.
This bug has been present since after the 4.10 release.
It fixes the issue "play the bvh error" #2187
Almost all bvh files are affected, such as any of the CMU library.
The bug is caused by the introduction of channelMap in the BVHLoader.cpp - function void BVHLoader::CreateAnimation(aiScene *pScene). The channelMap loses the rotation order present oin the BVH file, and always applies the rotations in X,Y,Z order.
Krishty
Kim Kulling
Malcolm Tyrrell
Kevin Shepherd