Today, let's recap the Revit API discussion forum thread on moving the location of a section view raised by Danny Bentley, BIM Structural Technician at SOM in California, since Danny very kindly created a video and GitHub repo to demonstrate and share the solution, which will certainly be of use to others as well.
By the way, Danny also writes Bentley's Revit Dynamo & API blog on his personal exploration of the Revit API and Dynamo.
Why does it have a
ch domain, Danny?
Anyway, here is the issue moving the location of a section view:
Question: I saw a great post on the The Building Coder on how to create a section view to be aligned with a wall.
I'm working on a project in which the wall angle will change and I need to rotate an existing section to match it.
Is it possible to set a curve similar to a wall? I can't seem to find any curve or location point on the section view in RevitLookup.
LocationCurve locationCurve = wall.WallCurve; Transaction t = new Transaction( doc ); t.Start( "Move Wall" ); locationCurve.Curve = LinkedProfile; t.Commit();
Answer: Thank you for your query and appreciation.
First of all, out of habit, I repeat:
For your own comfort and security,
all use of transactions should be encapsulated in a
The Building Coder defines an entire topic group on handling transactions and transaction groups.
I think you can indeed change the wall location curve in a manner similar to what you show.
However, the code you list above is guaranteed not to work.
Beginning of misunderstanding
In this line, you make a copy of the wall location curve:
LocationCurve locationCurve = wall.WallCurve;
Then, you change something in the copy:
locationCurve.Curve = LinkedProfile;
And then you expect the wall to change?
Good luck with that.
You might have better luck with
wall.WallCurve = LinkedProfile;
It moves a wall using
wall.Location.Move( v )
by a given vector v.
End of misunderstanding
Oh, no, re-reading your query, I see you are trying to modify the section view, not the wall location line.
No, the section view does not have a location line.
It is controlled differently. The Revit SDK sample DynamicModelUpdate shows how to dynamically update a section view to follow a window placed in the model. You can adapt that to follow a wall in a similar fashion.
Here is a quick rundown of the places to look in that sample step by step:
public void Execute(UpdaterData data)
- Variables and method call:
FamilyInstance window = doc.GetElement( m_windowId ) as FamilyInstance; ViewSection section = doc.GetElement( m_sectionId ) as ViewSection; RejustSectionView( doc, window, section );
- Method implementation and action:
internal void RejustSectionView( Document doc, Element elem, ViewSection section ) ElementTransformUtils.RotateElement(doc, m_sectionElement.Id, axis, rotateAngle); ElementTransformUtils.MoveElement(doc, m_sectionElement.Id, translationVec);
Response: Perfect! I forget the many awesome examples in the SDK. I really need to look through them instead of always using Google.
Answer: I think you need to use both SDK and Internet searches, and more besides, as described in how to research to find a Revit API solution.
Response: I just wanted to add my solution in case anyone else is looking to align section views and create aligned sections.
Here is a 30-second video on YouTube showing my add-in in action:
The source code is provided on GitHub, in dannysbentley Sections repo.
It sports four external commands:
It also creates a neat little external application presenting a custom ribbon panel to drive them.
Many thanks to Danny for sharing this solution!