Hi All,
What MS DWG SAVE AS setting is causing this display behaviour of B-Splines in MS and AutoDesk Apps like TrueView:
Does TrueView have a command like REGEN? I see the same segmented display in AutoCAD 2012 and after I did a REGEN I get a smooth display. I do not know about TrueView other than the fact that it is an Autodesk product, but it is common seen in AutoCAD which often displays a coarse curve until you do a REGEN. In my opinion this technology REGEN that once had tramendarously helped computer graphics in the era of 286/386 PC's really shouldn't exist anymore, but apparently still does in AutoCAD. So if it also exists in TrueView, that's the tool you need.
Hi Don,
Thank you very much for your great support. Yes, you're right REGEN would help, but it is not available with Trueview > V2009.
But I was investigating this some further. MS is involved a little bit more with this issue.
My examples comes from a bigger project, size 2km x 2km.
When I'm doing a "fit view" in microstation for the whole project I get a 2km x 2km sized view.If I then doing a "save settings" and exit the drawing and reopen it with DWG Trueview or AutoCAD they shows stroked B-Splines > REGEN is necessary.
If I'm doing a "zoom in" for a smaller view, let's say 10 to 10m , after "save settings" and reopening the dwg with AutoCAD or Trueview the b-splines are smooth.
So, what saves Microstation to the DWG file, when the view is zoomed in!
Should I open a TR?
Regards
Frank
since 1985: GIS, CAD, Engineering (Civil) Senior Consultant : [Autodesk Civil 3D , Esri ArcGIS, VertiGIS: in previous days : Bentley MS V4 - V8i, GeoGraphics, Bentley Map V8i, InRoads, HHK Geograf, IBr DAVID] : Dev: [C, C++, .NET, Java, SQL, FORTRAN, UML][direct quote by: http://en.wikipedia.org/wiki/Helmut_Schmidt]: "Wer Kritik übel nimmt, hat etwas zu verbergen"Wer Grammatik- und/oder Rechtschreibfehler findet, der darf sie behalten :-)
What you have observed here is precisely what REGEN is designed to do: depending on the view size, AutoCAD draws a curve that can use less CPU yet present the curve to look good enough at the initial view size. When you change the view size, however, the curve is not necessarily redrawn, unless you do a REGEN. All of these has nothing to do with MicroStation. You'd get the same effect in a 100% AutoCAD and it is not a bug - it is done by design however outdated it seems. In summary, the bigger your view is, the coarse a curve/arc segments are; the smaller your initial view is, the finner resolution AutoCAD would draw them.
Now, you may ask why MicroStation does not produce a smaller view when saving your DGN to DWG? I believe it to be more desirable to retain your DGN drawing size in DWG than to making AutoCAD to draw curves with a higher resolution. Aside from that, attempt to beat AutoCAD's intended use of REGEN requires quess work: how small of a view you consider appropriate for your design and what is an acceptable initial curve resolution you'd want AutoCAD to draw etc. Autodesk designed REGEN to let user to decide what the initial view should be. If you must work in AutoCAD you probably don't have much choice but to do their intended way: you decide what resolution at what view is the best for a specific drawing, in either MicroStation or AutoCAD.
Thanks,
What you can also do in TrueView is to go to Tools > Options > Display and set the "Display resolutions" to something like 5000. When I opened the file directly in TrueView this was set at 100. Note that this setting is file specific.
René R. van den BrinkTechnical SupportBentley Systems Incorporated