topic Re: Can't substract the curtain wall from the mesh surface in Modeling

Can't substract the curtain wall from the mesh surface

Anonymous — Tue, 23 May 2023 12:54:53 GMT

I have created a mesh roof in Rhinoceros 4.0. Then exported it as .3ds file. Run the Archicad 12, and by using the .3ds to GDL object convertor, created a .gsm file out of my .3ds one.

Then I have inserted this .gsm file into the Archicad floor plan.

The problem is that I can not substract the Curtain wall from the roof (this newly created .gsm file) using SEO. Why I can't do that - substracting with upper extrusion the Curtain wall from the roof? When I try doing it, nothing happens. The curtain wall stays as is was.

You can see a preview of the problem here:

http://img529.imageshack.us/i/autobuskastanicaroof.png/

And here is the .pla Archicad 12 file:

http://www.filefront.com/17214280/autobuska_stanica.pla/

Thank you for the help.

Re: Can't substract the curtain wall from the mesh surface

David Maudlin — Thu, 19 Aug 2010 11:44:28 GMT

nedostizni:

SEO operators need to be solid bodies, and some objects are not. It looks like the object you are importing is not a solid body, but a plane surface. You might try creating an object that has depth and see if that makes a difference.

David

Re: Can't substract the curtain wall from the mesh surface

Anonymous — Thu, 19 Aug 2010 14:06:42 GMT

thank you for the answer. By depth, you mean thickness of the surface?

Re: Can't substract the curtain wall from the mesh surface

David Maudlin — Thu, 19 Aug 2010 14:26:54 GMT

nedostizni wrote:
thank you for the answer. By depth, you mean thickness of the surface?

Yes, but I cannot guarantee that creating this form with depth in another application then importing to ArchiCAD will work, it depends on how the form is translated into GDL.

David

Re: Can't substract the curtain wall from the mesh surface

Anonymous — Thu, 19 Aug 2010 22:13:41 GMT

Hm, ok then. Is there a way of creating this kind of surface in the Archicad directly?

Re: Can't substract the curtain wall from the mesh surface

David Maudlin — Fri, 20 Aug 2010 12:15:56 GMT

nedostizni :

You can use the Mesh Tool, but it will be laborious. The image below was done by importing a mesh from another project (just to prove the concept), selecting the curtain walls as Targets, the Mesh as Operator, and Intersection as the Operation. The Mesh is on a wireframe layer in this image, it should be hidden.

If you want the Mesh as the roof, then copy the mesh, lower the copy by the depth of the roof, and subtract the upper Mesh from the lower Mesh to create a form of uniform depth.

David

Re: Can't substract the curtain wall from the mesh surface

Anonymous — Sun, 29 Aug 2010 20:10:35 GMT

thank you for the reply David Maudin.
But using the mesh tool does not satisfies me as there are not smooth, but linear surface.

I tried with creating the new purple mesh surface in Rhino, but this time with a thickness of 15 centimeters. Exported this mesh surface from Rhino do .3ds file.
Then opened the Archicad, converted the .3ds file to .gsm and inserted it. But the same - nothing happens when I try to substract a curtain wall from this purple mesh surface. Actualy it does, this happens:

I get this message:

Pen number is less than 1 or greater than 255 at line 1 in the Master scriot of file "autobuska_stanica2.gsm"

STOP		CONTINUE

Is there a way to edit the .gsm file so that this error is fixed? Here is the .gsm file:

http://www.filefront.com/17246133/autobuska_stanica2.gsm

Re: Can't substract the curtain wall from the mesh surface

David Maudlin — Mon, 30 Aug 2010 11:53:34 GMT

nedostizni:

I took a look at this object and there is no code in the Master Script, so this may be a translation bug (when I use the object in ArchiCAD 14, there is no error message), I don't see a way to fix the error message within the object's code. When zooming in on this object in section, it appears to have no depth, are you getting the depth you created for this object?

If you are able to get the depth to translate, and this object still does not work with SEO, then you could use a Mesh that roughly follows the contour of this object, remaining between the top and bottom surfaces, use this Mesh for the SEO, then hide the Mesh's layer.

David

Re: Can't substract the curtain wall from the mesh surface

Anonymous — Mon, 30 Aug 2010 12:47:09 GMT

You also need to be sure that the part is a solid model and not just surfaces. You can tell this by cutting it with the marquee tool in 3D. If it appears hollow it is a surface model and cannot be an operator in SEO.

Re: Can't substract the curtain wall from the mesh surface

Anonymous — Sun, 05 Sep 2010 10:05:14 GMT

Thank you on answers both Mattew and David, and sorry for late reply.

David:
This one (the .gsm) is without depth - thickness, but I also created the one with thickness and still the same result.
Can you explain it to me a bit closer about how to create a mesh with similar shape like surface? I now how to use a mesh tool, and the whole process would probably be to elevate the mesh points in z direction, but still the shape of the surface is complex. Is there a way to create the mesh below the surface and then elevate the mesh points by clicking on the surface?

Mattew:
I just need to select the surface with the marquee tool (but in floor plan, or where?) and then File-->Cut ?

Re: Can't substract the curtain wall from the mesh surface

David Maudlin — Sun, 05 Sep 2010 12:40:54 GMT

nedostizni wrote:
Can you explain it to me a bit closer about how to create a mesh with similar shape like surface? I now how to use a mesh tool, and the whole process would probably be to elevate the mesh points in z direction, but still the shape of the surface is complex. Is there a way to create the mesh below the surface and then elevate the mesh points by clicking on the surface?

You could start by drawing a rectangular Mesh using the rightmost Geometry Method (the gridded rectangle icon), this allows you to input the number of rows and columns on the grid that will have an elevation point at each intersection, so this will define the fineness of the grid and subsequent 3D form. You will need to elevate each point either graphically in the 3D Window (where you could use your 3ds object as a visual reference), or in the 2D Window using numeric input. You can also alter the perimeter to match your 3ds form. The finer the grid, the closer you will be able to approximate your form, but the more time it will take to complete.

David

Re: Can't substract the curtain wall from the mesh surface

Anonymous — Sun, 12 Sep 2010 10:22:37 GMT

thank you for the asnwer David.