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AddCurveToRegion(RasterRegionXForm,IList<LeadPoint>,float,LeadFillMode,RasterRegionCombineMode) Method


Creates or updates the image region by adding a curved region.

Public Overloads Sub AddCurveToRegion( _ 
   ByVal xform As RasterRegionXForm, _ 
   ByVal points As IList(Of LeadPoint), _ 
   ByVal tension As Single, _ 
   ByVal fillMode As LeadFillMode, _ 
   ByVal combineMode As RasterRegionCombineMode _ 
public void addCurveToRegion( 
  RasterRegionXForm xform,  
  List<LeadPoint> points,  
  float tension,  
  Path.FillType fillMode,  
  RasterRegionCombineMode combineMode 


RasterRegionXForm object that LEADTOOLS uses to translate between display coordinates and image coordinates. If you specify null in this parameter, the scalar fields default to 1, the offsets default to 0, and the view perspective defaults to the image view perspective.

Collection of LeadPoint objects. The points in the array must be in the order in which the vertices of the polygon are connected. To create the line that closes the polygon, the last point in the array is connected to the first point of the array.

A value that specifies the amount that the curve bends between control points. Values greater than 1 produce unpredictable results.

Indicates how to handle complex crossing lines.

Value Meaning
LeadFillMode.Winding All pixels that are inside the resulting exterior lines are in the region.
LeadFillMode.Alternate The region includes the area between odd-numbered and even-numbered polygon sides on each scan line.
Fill Mode

The action to take regarding the existing image region, if one is defined.


To update an existing region, you specify how the new region is to be combined with the existing one using the combineMode parameter. For more information, refer to RasterRegionCombineMode.

For more information, refer to Creating a Region.

For more information, refer to Saving A Region.

For more information, refer to Working with the Existing Region.


For an example, refer to AddCurveToRegion


Target Platforms

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