Terrain in VisualArq

Hi @fsalla is it possible to tag a mesh as a terrain in VisualArq?

We need the IFC importer and exporter for landscape architecture and see that both walls, railing and stairs can be of great use too.

Hi @Holo, there is no IfcSite yet in VisualARQ. I add your vote for this feature request.

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Hi Ramon,
thanks for the reply.
I make my own mesh for the terrain, so is there any ways I could tag this my self through VisualArq? And if so, how could this be done in a correct manner?

I see that slabs are also quite often used since that support thickness, but I could not find a way to have a slab from a none planar edge curve.

What you can do is to add custom parameters to any object. Those are also exported in the IFC file as extra information that other software usually read. Check out this video to learn more about custom parameters:

There is no IfcSite available because if we add this tag we should also check that there is only one element with this tag in the model. This feature is scheduled for the version 3 of VisualARQ.

About the slabs, if you want to create non planar slabs you should use the Slab From Surface option. It is located under the same Slab tool.

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Thanks, but we would need a SlabFromMesh then, can you put that on the wishlist too? :slight_smile:
(Converting the mesh to nurbs would result in a really heavy object, so that is not desired, but we’ll try out the SlabFromSurface too though!)

We could think about that possibility in the future, even if it doesn’t seems very useful for most of users.

Well, if that’s the case among your customers then you shouldn’t waste time on doing it :wink:
Here on hilly Norway a site elevation is almost always needed though.

+1 from the middle of the North Atlantic!

Hi Roi,

For the IfcTag or for the Slab From Mesh?

Both really

@Holo, for non planar slabs, why don’t you just tag a mesh or a polysurface with the ifcSlab category?

Yeah, that is a workaround for when I need to export.
But it doesn’t give me the benefit of having a dynamic topsurface that I can set the extrusion distance of and still control the controlpoints.
Also we need a (preferably dynamic) mesh that can be adjusted on the fly with a given extrusion distance, or to a given height.

I’d be happy to share my needs and processes with you when and if you guys start working on this. It should be quite easy to achieve similar results to what Revit has.

Hi guys, this is what I have been working on for the day:

It’s a mesh terrain generator that uses a boundry curve and inner points, then meshes those and extrudes the top face with a given height.
And then adds an IfcEntity as IfcSlab to it.

Now what it doesn’t have is live update, so I can’t edit the curves and points in realtime, nor add new points. (Then I have to delete the object and then recalculate, which is quickly done though, but not smoooooth :wink: )

So hopefully that shows you what I wish for.

Good night!


Hi @Holo,

Nice tool! But I suppose you meant that it adds the IfcSite instead of IfcSlab no?

Also I would like to know why do you need the thickness.

Hi, I meant IfcSlab as I wrote and that’s why it has thickness too. Sites are mainly for architects, but landscaple architecture needs thickness to the layers when working with areas for pebble, sand, grass, drainage, asphalt etc.

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Hi guys,
the slabs exports and imports back in nicely, but when back in Rhino I see that 2D curves are automatically generated and projected to C-plane, but not all…

(And the hedges looses their material and edge softening)


Which software did you use to import and export back to Rhino the Ifc file?
If you send it to visualarq@asuni.com I will take a look to the issue with the curves.

Both export and import was done in Rhino 6 with VisualArq, I can’t send you the entire file, but I’ll see if I can export enough elements for you to reproduce the issues.