The proximity value to the ray's origin when the reference is returned by FindReferencesWithContextByDirection(XYZ, XYZ, View3D) or ReferenceIntersector.Find(XYZ, XYZ).
Namespace:
Autodesk.Revit.DB
Assembly:
RevitAPI
(in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0)
Since:
2012