Identifies if the input roughness is valid. 
   Namespace:   Autodesk.Revit.DB.Mechanical  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2012 
Syntax
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Parameters
- roughness
 -  Type:  System Double  
The roughness to check. 
Return Value
True if the value is acceptable, false otherwise.Remarks
 Roughness should be at least equal to or larger than 0.