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Previous solution to make bundles work for parented camera
wasn't very nice. It could totally confuse depsgraph and it's
quite slow.
Now i've implemented function where_is_object_mat which makes
almost the same as where_is_object_time, but it:
- Does not applies constraints.
- Assumes matrices for all dependencies are valie already
(handles by depsgraph).
- Doesn't make any changes to object itself or it's
dependencies.
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