The Global ARCHICAD Community

Stay informed. Get help. Share your knowledge.

Modelling and drafting in ARCHICAD. (Example: How can I model a Roof soffit/fascia?)

Moderators: Karl Ottenstein, LaszloNagy, ejrolon, Barry Kelly, gkmethy

By darwinland
#287528
Is it possible to use google maps to create a mesh for the terrain?
By Jim Allen
#289014
There is a way to do this, but it's a bit fiddly. You need to download and install the Free Open Source Meshlab application as a conduit - http://www.meshlab.net/

You can take your terrain from SketchUp and export it as collada - .dae format.

Open Meshlab and import the collada file. The big drawback with this, is that the terrain when loaded into Meshlab is not real world scale you you need to scale it in Meshlab. There are instructions for this here: https://www.google.com/search?q=meshlab ... &ie=UTF-8

Then you can export to an xyz file (use the without normals option), and use Archicad's 'Place Mesh from surveyor's data' option.

This gives you a true scaled SketchUp mesh in Archicad. The next thing you need to do is scale the texture to fit the mesh. The texture is imported, but there is nothing in the xyz file to map it to the mesh, so you need to do it manually.

Unfortunately Archicad will not allow you to scale a mesh in 3 dimensions. You can scale in x and y, but not z, which flattens your terrain. This means that scaling in Meshlab is your only option.

If only Graphisoft would allow us to import 3d terrain from other file formats and create a mesh instead of a morph. Or at least allow us to convert a morph to a mesh...

Here's the result.
Attachments
Screen Shot 2018-11-20 at 15.56.38.png
User avatar
By vistasp
#289043
I haven't yet had a chance to try this, but someone posted this video and link on a Facebook AC user group. Apparently, this plugin allows you to import a terrain directy as a mesh.



https://bimtech.eu/en/bimtech-tools-for-architects/
User avatar
By Erwin Edel
#289046
As awesome as that looks, I would say it is limited to the Czech cadastre? It refers to 'Český úřad zeměměřický a katastrální' on their website.
By Marky
#289056
2d.jpg
As awesome as that looks, I would say it is limited to the Czech cadastre? It refers to 'Český úřad zeměměřický a katastrální' on their website.
Even more awesome.

Didn't even bother to go to their website, just installed (AC19) and checked first for a location in Poland and next for the part of Manhattan downtown (Battery Park).
Looks like it connects to the local cadaster automatically.
Attachments
3d.jpg
2d.jpg
Last edited by Marky on Wed Nov 21, 2018 1:54 pm, edited 1 time in total.
By Marky
#289057
Tried to edit the images placement but it worked only at first, then I'm unable to put in order.
Er well....
By celeste
#295844
Jim Allen wrote:
Tue Nov 20, 2018 5:00 pm
There is a way to do this, but it's a bit fiddly. You need to download and install the Free Open Source Meshlab application as a conduit - http://www.meshlab.net/

You can take your terrain from SketchUp and export it as collada - .dae format.

Open Meshlab and import the collada file. The big drawback with this, is that the terrain when loaded into Meshlab is not real world scale you you need to scale it in Meshlab. There are instructions for this here: https://www.google.com/search?q=meshlab ... &ie=UTF-8

Then you can export to an xyz file (use the without normals option), and use Archicad's 'Place Mesh from surveyor's data' option.

This gives you a true scaled SketchUp mesh in Archicad. The next thing you need to do is scale the texture to fit the mesh. The texture is imported, but there is nothing in the xyz file to map it to the mesh, so you need to do it manually.

Unfortunately Archicad will not allow you to scale a mesh in 3 dimensions. You can scale in x and y, but not z, which flattens your terrain. This means that scaling in Meshlab is your only option.

If only Graphisoft would allow us to import 3d terrain from other file formats and create a mesh instead of a morph. Or at least allow us to convert a morph to a mesh...

Here's the result.
I followed your procedure but once imported the file the image of the terrain was missed, I can see only the mesh and there is no image imported inside the surfaces archive.

Can you help me?
By Jim Allen
#309152
Sorry Celeste, notifications weren't sending me e-mails, so I didn't see this until now, which is obviously far too late!

If the texture is in the Meshlab file, it should import fine. You'll probably need to change the bitmap scale manually in Archicad though.

You can manually load the texture file anyway, using the Creative imaging tools to position the origin and rotation of the texture. You'll still have to scale the image in the surface editor.

It is a pain, and actually morphs are easier to mange. The Mesh terrain features are actually broken. The Import mesh from surveyors data is not fit for purpose.

It's better to take a proper weighted triangulated 3d model from another modeller, apply the texture, and import as a morph. The texture comes through properly then.

You can't use the nice mesh editing tools, but you get a much, much more accurate terrain.

What we actually need is a tool which converts a morph to a mesh. That's actually all we need. There are enough tools out there which allow us to get triangulated terrain models without having to build it in Archicad. In fact building terrain in archicad for large sites makes absolutely no sense whatsoever.

I was chatting to Graphisoft Tech people at the AIA convention a couple of years ago, and apparently a much improved mesh tool is coming.

I don't know how much you have worked with meshes, but it's absolutely infuriating.

You move a node and the triangulation recomputes apparently randomly! It's not like a SketchUp mesh or a morph where you can freely move and snap nodes controlling their position in any of the axes.

Where I work, in Wales in the UK we almost never get flat sites, and understanding the topography in 3D is really important. Unfortunately this means I have spent many hours trying to make the mesh tool work effectively, and almost always failing in some measure.
#309180
Jim Allen wrote:
Thu Apr 02, 2020 5:45 pm
Sorry Celeste, notifications weren't sending me e-mails, so I didn't see this until now, which is obviously far too late!

This may help with the e-mail notifications.
If you remember to come back here and have a look! :lol:

https://archicad-talk.graphisoft.com/vi ... 10#p306505

Barry.