Since AutoCAD Civil 3D 2011 and since all types of AutoCAD 2012 (and higher) you can interpret special RSC linetypes imported from DGN files.
The standard command DGNIMPORT detects references to external .RSC files and if the respective RSC file is available in the support path, its linetype definitions are converted so that the DGN entities look the same also in the AutoCAD DWG drawing. It is not neccessary to set any mappings in the DGN import dialog - the conversion is automatic. If the requested RSC file is not available during import, lines are imported in simple linetypes. After the import, the RSC file is not needed anymore. This method supports both V7 and V8 DGN files.
With this method you can work in AutoCAD with such linetypes as parallel lines, hatched double-lines, lines with special symbols at its ends, lines starting with one symbol and ending with another one, etc. - see an example:
The sample DWG drawing is available in the customer section of the Block Catalog.
As the standard mechanism for linetype definitions in AutoCAD (.LIN) does not allow to work with such types of complex lines, the DGN Import uses a special extension of standard drawing objects. The entities behave like normal lines and polylines but they are saved back to older AutoCAD versions as entities with proxy objects. These non-standard linetypes can be also assigned to other drawing objects.
We recommend to avoid grip-editing on polylines with these non-standard linetypes.
Have we helped you? If you want to support the CAD Forum web service, consider buying one of our CAD applications, or our custom software development offerings, or donating via PayPal (see above).
You may also add a link to your web - like this "fan" link:
Featuring: Increase your productivity with our set of BIM add-on functions for Autodesk Revit CADstudio Revit Tools
Please use these tips at your own risk. CAD Studio (Xanadu) is not responsible for possible problems that may occur as a result of using any of these tips.
CAD Forum - tips, tricks, help, how-tos and FAQ for AutoCAD, LT, Inventor, Revit, Map, Civil 3D, MapGuide, 3ds max and other Autodesk software (support by CAD Studio)