Room Boundaries to CSV and WPF Template

Happy New Year to the Revit API developer community!

I spent some time during the winter break working on CSV export of room boundaries for a Forge BIM surface classification tool.

Ali Asad presented a new Visual Studio WPF MVVM Revit add-in template:

• Export room boundaries to CSV for Forge surface classification
• Visual Studio WPF MVVM Revit add-in template

Export Room Boundaries to CSV for Forge Surface Classification

A Forge BIM surface classification tool requires room boundaries to display them in the Forge viewer.

One simple way to obtain them via the Revit API is demonstrated
by The Building Coder samples in
the external command CmdListAllRooms.

It was originally presented in 2011, and enhanced in some further discussions:

• Accessing room data.
• How to distinguish redundant rooms
• Bounding box ExpandToContain and lower left corner of room
• 2D convex hull algorithm in C# using XYZ

I modified its output to generate the required data and export that to CSV in a number of update releases:

• 2019.0.144.14 – export room boundaries in millimetres
• 2019.0.144.13 – implemented IntPoint3d
• 2019.0.144.12 – implemented IntPoint2d
• 2019.0.144.11 – implemented onlySpaceSeparator argument for PointString and PointArrayString
• 2019.0.144.10 – remove Z component from room boundary and convex hull
• 2019.0.144.9 – implemented CSV export for CmdListAllRooms
• 2019.0.144.8 – implemented export of complete list of points of first room boundary loop
• 2019.0.144.7 – handle empty boundary curve in GetConvexHullOfRoomBoundary

Next, I might reimplement the external command as a DB-only add-in to be run in the DA4R
or Forge Design Automation for Revit environment.

Visual Studio WPF MVVM Revit Add-In Template

Ali @imaliasad Asad
presented
a Visual Studio WPF Revit add-in template.

It empowers you to use the Visual Studio WPF template for Revit add-in development and includes:

• Well organized MVVM architecture for Revit add-in development
• WPF user control to design beautiful Revit add-in
• Auto create ribbon tab and panel
• Util.cs for writing helper methods

Many thanks to Ali for sharing this useful tool!