I noticed that when importing closed polylines from AutoCAD they come into Sketchup not as faces, but as lines. There is a simple workaround; you can just add a Sketchup line to the AutoCAD lines and a face will be created–you can then delete the added line. (Note: Just to envision what I’m trying…

Thanks for this info. Yeah, I see your point–you can redraw over one of the imported faces and avoid deleting. However, I sort of thought that having coincident geometry is a bad thing. When doing it the way I’ve been doing it, drawing a quick line from one side to another, it is easily visible a…

[image] jonr: I sort of thought that having coincident geometry is a bad thing Sketchup geometry sticks together, so if it is in the same context the two edges become one, no coincided geometry to worry about. [Coinc]

Ok, yeah, good point. I did know that (about the stickiness); I just didn’t apply it when thinking about this specific issue :slight_smile: But let me explain this in a different way. The molding profiles are fairly ornate…have lots of detail to them, so when just quickly adding a line it would…

Totally understand, don’t want to add edges where they aren’t needed. Can be a problem too with cad imports not being flat or having edges sticking up due to some cad programs ignoring the z axis. You can end up joining to an endpoint the isn’t at 0.

Yes, definitely; having random objects not respecting z=0 is a real hassle. However, in the situation I was working with, using polylines, these are strictly 2D objects. AutoCAD won’t let you create the various segments at different Z elevations. In other words they are always flat. I guess the …

You might also wanna check this thread: [image] Asking for help designing Commercial and Collaborative Work When manufacturers of profiles have .dwg or .dxf files, and you import them, the profiles are usually not very useful in SketchUp, due to the high number of loose ed…

[image] jonr: But I think AutoCAD as an app is pretty good at keeping track of ‘Z’…a lot of problems with AutoCAD and this issue is with user error, and sloppy CAD work 100% here.

[image] jonr: However, in the situation I was working with, using polylines, these are strictly 2D objects. AutoCAD won’t let you create the various segments at different Z elevations. What about 3D polylines? You can certainly do it with these.

Right; but I wasn’t talking about 3D polylines. Hey, I’m trying to focus the discussion! :slight_smile: Speaking of which…I don’t think 3D polylines are used that much in AutoCAD…definitely compared to 2d Polylines. I think that holds true even for 3d modeling where the common workflow would be…

Mike, thanks for this info. This is interesting, and I’m new to thinking about geometry efficiency, at least as far as Sketchup is concerned. I have some experience with it using 3ds Studio. Before digging into this and checking out the thread you suggested and the extensions, does weld really ha…

A minor question on AutoCAD import

SketchUp

MikeWayzovski July 22, 2019, 5:50am 8

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A minor question on AutoCAD import

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