topic Re: Importing a terrain from a 3D dwg in Collaboration with other software

Importing a terrain from a 3D dwg

Sam Karli — Sat, 13 Oct 2012 13:40:19 GMT

Hi, in Hungary most widespread way of getting terrain data from civil engineers is through a 3D AutoCAD dwg file, and I can't make a real 3D Terrain in ArchiCAD.

The program opens the dwg, but it's converted into 2D. If I choose a through gdl import, I've got the 3D, but with no hotspots to snap a terrain onto them.

I imported the data into Blender, and then into collada, to get it in SketcUp (done), but found that my Sketchup .skps are imported into my ArchiCAD SE 2010 differently than advertised, again, I get a gdl element without walls or slabs (I tried simple boxes and the like to test the thing, didn't work).

I have Autocad LTs, Archicad SE 2006 and 2010; Blender and Sketchup. But couldn't do the import.

Any ideas? Thanks in advance.

Re: Importing a terrain from a 3D dwg

David Maudlin — Sun, 14 Oct 2012 12:47:42 GMT

Sam wrote:
If I choose a through gdl import, I've got the 3D, but with no hotspots to snap a terrain onto them.

If you open the terrain library part, go to the 2D Symbol window, and place hotspots with the Hotspots Tool, and save the part. This will add hotspots to the 2D Symbol in the plan view. (I am assuming this will work in the SE version). If you had AC 16, you could convert this object to Morphs and edit it directly in the 3D Window.

David

Re: Importing a terrain from a 3D dwg

Sam Karli — Sun, 14 Oct 2012 21:37:34 GMT

Thanks,

I can add hotsports in the 2D symbol view, but they are, again, in 2D (having Z coords 0), and it's the Z (height data) that I search for 😞

PS
But this gave me the idea of the usual solution:
I opened the 3D script (of only lines) in Notepad++, and made a Regex-search/replace. Just for fun, the two parameters were:
What:
^LIN_ ([^,]*,[^,]*,[^,]*),
To:
hotspot $1 \nhotspot

And this converted every line into two hotspots (start and end) .

Re: Importing a terrain from a 3D dwg

Sam Karli — Mon, 15 Oct 2012 14:57:42 GMT

The only problem is that the imported GDL stuff is just 2 digit precise (ie. a point's coordinates are like 000.00, not 000.0000), that's not too much.

Re: Importing a terrain from a 3D dwg

Anonymous — Tue, 16 Oct 2012 20:24:33 GMT

Why not just add the line at the beginning of the script:

HOTSPOT 0,0,0

Re: Importing a terrain from a 3D dwg

Sam Karli — Tue, 16 Oct 2012 20:57:34 GMT

I don't understand this, what is this line for?

Re: Importing a terrain from a 3D dwg

Anonymous — Thu, 18 Oct 2012 19:12:03 GMT

This line in the 3D script will generate the hotspot at the origin.
You will be able to move the object and have the real reference.

Re: Importing a terrain from a 3D dwg

Anonymous — Wed, 05 Jun 2013 13:10:34 GMT

I am facing a similar problem. I am using AC16 and I have a DXF with the terrain in 3d.
Any idea on how to model the terrain from the DWG 3d model?

Re: Importing a terrain from a 3D dwg

Anonymous — Wed, 05 Jun 2013 15:07:51 GMT

1. Open that .dxf file in AutoCAD or similar program with LISP support
2. Follow the instructions in this thread:

http://archicad-talk.graphisoft.com/viewtopic.php?t=39671&highlight=mesh

Re: Importing a terrain from a 3D dwg

Anonymous — Thu, 06 Jun 2013 07:08:32 GMT

Thank you andro55!
Moving to the other post for questions.