Creation of an open Shell in revit

[Anonymous]

Hi, I am currenlty trying to analyse some export and Modellcheking featurese for a project at uni and for that I am working with the CPI-Plugin in Revit which also comes with a Open Shell Check. In order to experiment with that I will need to create a model with an actuall shell in Revit. Ist there anyone who has a clue of how to model an open shell in order to provoke an error or atleas a notification whe checking for that? 

Thanks 

Arne

[Anonymous]

Hi, I am currenlty trying to analyse some export and Modellcheking featurese for a project at uni and for that I am working with the CPI-Plugin in Revit which also comes with a Open Shell Check. In order to experiment with that I will need to create a model with an actuall shell in Revit. Ist there anyone who has a clue of how to model an open shell in order to provoke an error or atleas a notification whe checking for that? 

Thanks 

Arne

[jeremy_tammik]

I would assume that an open shell can be built using the BrepBuilder:

https://thebuildingcoder.typepad.com/blog/2018/02/directshape-from-brepbuilder-and-boolean.html

• Revit 2017 and 2018 SDK Samples
• DirectShape from BrepBuilder and Boolean

However, the TessellatedShapeBuilder class is easier to use and also supports open shells:

https://www.revitapidocs.com/2021.1/a144b0e3-c997-eac1-5c00-51c56d9e66f2.htm

Its target types include just about anything:

https://www.revitapidocs.com/2021.1/c445e799-cb1d-a4cb-5333-719f5c19df18.htm

Solid	A solid, i.e., a Geometry, where all edges are shared by two and only two faces and which divides all 3d space into bounded inner and infinite outer area(s).
AnyGeometry	A Geometry, which depending on input data can be a Solid or a 'sheet', where there is no fully enclosed volume formed by the generated faces.
Mesh	A mesh.

Samples on The Building Coder:

https://www.google.com/search?q=TessellatedShapeBuilder&as_sitesearch=thebuildingcoder.typepad.com

[jeremy_tammik]

I would assume that an open shell can be built using the BrepBuilder:

https://thebuildingcoder.typepad.com/blog/2018/02/directshape-from-brepbuilder-and-boolean.html

• Revit 2017 and 2018 SDK Samples
• DirectShape from BrepBuilder and Boolean

However, the TessellatedShapeBuilder class is easier to use and also supports open shells:

https://www.revitapidocs.com/2021.1/a144b0e3-c997-eac1-5c00-51c56d9e66f2.htm

Its target types include just about anything:

https://www.revitapidocs.com/2021.1/c445e799-cb1d-a4cb-5333-719f5c19df18.htm

Solid	A solid, i.e., a Geometry, where all edges are shared by two and only two faces and which divides all 3d space into bounded inner and infinite outer area(s).
AnyGeometry	A Geometry, which depending on input data can be a Solid or a 'sheet', where there is no fully enclosed volume formed by the generated faces.
Mesh	A mesh.

Samples on The Building Coder:

https://www.google.com/search?q=TessellatedShapeBuilder&as_sitesearch=thebuildingcoder.typepad.com