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:

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:

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

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.

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

Many thanks to Ali for sharing this useful tool!