I implemented a neat new little sample add-in, RvtFader, that calculates and displays signal attenuation caused by distance and obstacles, specifically walls.It uses two very interesting pieces of Revit API functionality AVF, the Analysis Visualisation Framework, for displaying graphical data in a transient manner directly in the BIM The ReferenceIntersector ray tracing functionality to detect walls and other obstacles between two points.In the course of implementing the AVF part of things, I also resuscitated my trusty old RevitWebcam add-in RevitWebcam RvtFader Task Implementation Further Reading...

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