Brep geometries not really flat in Rhino

Rhino
1

Hello Rhino Community,

I am a newbie and I am facing some issues, some Brep bottoms of my geometries (buildings in my case) are not flat to the Cplane. Is there any way how to make them be flat on the Cplane? I tried to map and align and it didn’t work. I would really appreciate your help.

Thank you

2

Without seeing any Rhino file, some options you could try:

-Project command (this will take curves and project them the surface of a brep or to a plane)

-Plane & Brep intersection (use your Cplane to intersect your building breps to get new cleanly aligned curves to work with)

Please share a Rhino file with a limited scope of your problem (building geometry for instance) and we can help you more.

3

Hello,

I am attaching it as a drive link due to the large size it has.
https://drive.google.com/drive/folders/15l8HEGKyW_4ThRzApol5dC6fvBmQt1F6?usp=sharing

I don’t know if the bottom surface of the buildings are not flat and on the plane due to the relieve of the site (it was a city gml file) or there is a loss of information during the export.

Thank you for your help!

4

Hi Kristina - two things to pay attention to-

  1. This is a public forum and you have posted a link to a massive file which may or may not be confidential,
  2. The file is very large. I am not going to try to figure out what, in that massive file, you are asking about. Please export one or two objects to a new file and post just that here.

-Pascal

5

Dear Pascal thank you for the advice.
I am attaching below a file with a few buildings, in order to make it more obvious I have changed the layer of one of the buildings that has the issue under the layer named “problem”. Hope it is understandable and doesn’t require a lot of effort from your side.
https://drive.google.com/file/d/1ic58OPJGxeWhLqU4szXuw4A4VJL8BIe5/view?usp=sharing

Thank you in advance!

6

Hi Kristina - select all the buildings, use Align > Bottom in the Front or Right view and set the alignment point to the origin by typing ‘0’ and Enter.

You may want to MergeAllCoplanarFaces on these objects, to simplify them.
image

-Pascal