File > Open
File > Import
Import differs from
Open essentially in two aspects:
Import can be used to combine several files in one.
Import you are able to select what entities do you want to read and what ID Offset do you want to perform to each entity.
In addition you can specify what to do if a duplicated ID is encountered: you can keep the old entity or not (by marking
Overwrite entities (by ID) option).
To show the actual use of Import please see the following examples.
This simple model was split in two:
Note that in those two models there are some shared nodes.
Node 81) has been slightly modified:
Given this situation
By using default offset you avoid any overwriting of entities. Shared or not, everything will be renumbered. Shared entities between models might get duplicated. In this particular case 3 nodes are coincident.
New entities will be imported, but any entity with a duplicated ID will be ignored. In this case, shared nodes are the ones present in the original model.
Using this option new data will be imported, but if any ID collision is detected the retained entity will be the last one.
■ If you don't care about numbering, or you don't know if there might be shared IDs between two models (and don't want to risk): use
Default Offset (option A).
■ If numbering must be conserved and you know that no entities have the same ID, use
■ To import new data but in case of ID duplication keep the original: use
No Overwrite / No Offset (option B).
■ To update certain entities (nodes, materials, etc) use
Overwrite / No Offset (option C).