Creates a PolymeshFacet with the supplied vertices. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 21.0.0.0 (21.1.1.109) 
  Since:  2019.2 
Syntax
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Parameters
- v1
-  Type:  System Int32  
 The first vertex.
- v2
-  Type:  System Int32  
 The second vertex.
- v3
-  Type:  System Int32  
 The third vertex.