Retrieves the current up vector of the specified limb.
The up vector will be copied to the provided vector3 (which will also be returned by this function) or
it will be put into a temporary vector3 which is returned and only valid until the next call to DX11 SYNC.

Return Dword = DX11 GET LIMB UP VECTOR(limb, [resultVector])

limb

Dword
The limb to get the current forward vector of.

[Optional] resultVector

Dword
The limb's up vector will be copied here, or to a temporary vector3 if this parameter is omitted.

Returns the resultVector if it was provided, or the newly created temporary vector3 holding the limb's up vector otherwise.

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