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refactor: replace raw object pointers with SmartPointer in ObjectsContext and update dependent codebases

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AndreaRigoni
2026-04-17 13:28:24 +00:00
parent 506b8f037f
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docs/object_context.md
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In uLib the context is meant to hold a set of objects and their hierarchy. In addition ObjectFactory is used to create objects from a predefined registry.
Object context can be thouught as a collection of uLib::Object instances. And there exists nested collection of objects if a context is added to another context. A nested context is a Group of elements that appears like a single object in the parent context and a hierarchy of objects inside the tree structure.
## Geant Physical Volumes
The Geant library add a further layer of complexity. The physical volumes are created from a what is called LogicalVolume (which holds information about the shape, material and daughter volumes) and represent the actual instances of the volumes in the detector. So in this sense they represent what could be the Prop3D in the uLib Vtk library. The PhysicalVolume is created from the LogicalVolume and is the one that is actually placed in the scene, with its own relative TRS: position and rotation (rotation here is a rotation matrix comprising the scaling).