Dynamo Tip: Troubleshooting the Select Multiple Faces node

By Dennis Collin

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Working with Dynamo involves making use of nodes which perform a variety of tasks from accessing files, creating and processing lists and selecting objects. One of the selection nodes enables users to select multiple faces interactively. This node expects users to either use an additive selection or crossing window method. However, when working within the script it is not obvious how to tell Dynamo that you have finished the selection process. The usual spacebar or right click method does not work and if working with multiple screens and applications simultaneously it is not obvious on what to do next.

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In the sample script below, a script has been written to create an array of beams to follow the surface of a Mass object using isolines as a reference. The singular select face node returns the selection back to the script automatically. However, with the multiple select faces node, a finish selection button in Revit’s options bar needs to be pressed before the script can be processed.

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If using Dynamo player to run the script, users have a much more intuitive environment for face, detail, structural member and level selection options.

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