When I attach a DGN Model or DWG Space, the attachment insert point is usually based on the ACS/UCS of the attached CAD file.
When I attach a file, it would be great if those coordinate system origin points can be added to the Active File DGN ACS dialog, perhaps in separate ACS tabs that we can used in our design.
These attachment ACS origins could also be displayed in the Active Model and used for designing.
They can also be used as a basis for Saved Views, Visualisation, or for Cells.
I added to the title to include any ACS compass created in a Cell, for the ACS to be placed with the Cell. This would be very convenient for a number of reasons, I can place complex objects, or simple objects and their accompanying ACS can be used as a design navigation and content creation aid.
So, one of the additional outcomes for this is to provide a more fluidic ability to implement and use ASC to navigate a model in a more coherent manner in 2D or 3D. Importantly, the Global ASC should be a foundation coordinate system that can't be removed, like a Default Model.
ASC can also be copied to a different Model of the same dimensions [2D or 3D]
The keyin commands to support creation and navigation of ASC. Also, via the ASC dialog, to double-click or select and apply to a View to maintain ease of use in navigating ASC nodes.
They might also be named like Named Fences can be.
If you wanted to take it a step further, then each ASC can support a different Unit of Measurement if it's doable and feasible, perhaps for things like emulating GIS or coordinating maps that are attached, or surveys
The ASC can also be stacked because they are transient objects.
The ASC nodes can even be used for plotting for example, to plot a model face, a map location, etc.
I want to plainly see where the ACS compasses are for an attachment or Cell. My examples are use cases in knowing that information. They can be a sub-option in the View Attributes under the existing ASC toggle.
When I attach or place a Cell or whatever, I can then open the ASC dialog and see the by-line ASC items,
In the Active View, the attached or Cell derived ASC compasses are displayed and highlighted when selected them [like a reference file] and the description of where they're sourced from, and I will be able to navigate to them on a double-click or whatever.
When the ASC dialog is opened, I want to see them in context because, for an attachment, for example, if the file is attached at an arbitrary point instead of the ASC, then I want to know where the ASC is relative to the placement point. I can adjust the attachment or fix an attachment that is askew or easily navigate to use the Ref file as a basis for Active file design drawing.
I don't really need workarounds; I want to see and use the ASC compasses and reorient my View according to that compass to work or frame content around it.
The utilisations in my examples are a product of being able to identify and use attached ASC compasses.
I think some of what you are proposing is already possible using Saved Views. It would help to clarify a bit more about how you see this working. I think you would like:
A means to save the Ref attachment translation, rotation, scaling as an ACS? I suppose the ACS tool dialog has a By Element option that can be enhanced to recognise Ref Attachments. ACS tool would not recognise scaling, clipping and all the other Ref attach settings that would need to be saved... not great for a lot of Ref (re)attachment purposes.
Saved Views: I suppose you could modify the Apply Saved Views dialog to include a drop down for the Model button to allow the user to re-path the file. This would cover all the settings that the ACS dialog currently ignores.
Ref Dialog: I think MS-I-123 is planed. This would allow the user to define, map the incoming Ref attachment's GCS, MCS to an ACS. Should work nicely with item 1, which allows the user to save the ACS by selecting a Ref attachment.