How to back-calculate the assembly's BoundingBox by relying on the part's BoundingBox

   In stream cache loading mode, is it necessary to know the BoundingBox of each part and assembly in advance if you want to use the streamCutoffScale parameter to take effect?

In stream cache loading mode, is it necessary to know the BoundingBox of each part and assembly in advance if you want to use the streamCutoffScale parameter to take effect?
Our current conversion process for CATIA V5 is to convert only the parts (CATPart) of the whole assembly structure to generate the corresponding stream cached SC models, the assemblies (CATProduct) are not converted (because assemblies take a lot of memory to convert the large models).Communicator performs the conversion on the front end via relativeMatrix LoadSubtreeFromXMLBuffer assembly, but in this mode there is no given BoudingBox, the performance optimization parameter streamCutoffScale does not take effect, is it possible to make streamCutoffScale parameter take effect by giving the BoudingBox of the part (CATPart) in XML only?