Informs the filter that a series of points within a given cell is about to be checked. 
   Namespace:   Autodesk.Revit.DB.PointClouds  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2012 
Syntax
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Parameters
- min
 -  Type:  Autodesk.Revit.DB XYZ  
The lower corner of the cell. 
- max
 -  Type:  Autodesk.Revit.DB XYZ  
The upper corner of the cell. 
- numTests
 -  Type:  System Int32  
The engine's estimate of the number of TestPoint() calls it is going to make for this cell. 
Remarks
 This is a performance hook that the filter can use to minimize computational work per TestPoint() call within a given cell. The engine should guarantee that all points passed to TestPoint() calls will fall inside the (min, max) box specified here. This promise must be in effect until the next PrepareForCell() call. 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL |