SideBuffer(IEnumerable<Polyline>,Double,LeftOrRightSide,LineCapType) Method

In This Topic

Constructs a buffer on one side of a polyline

Syntax

C#
Visual Basic (Declaration)

public IReadOnlyList<Geometry> SideBuffer( 
   IEnumerable<Polyline> polylines,
   double distance,
   LeftOrRightSide side,
   LineCapType capType
)

Public Overloads Function SideBuffer( _
   ByVal polylines As IEnumerable(Of Polyline), _
   ByVal distance As Double, _
   ByVal side As LeftOrRightSide, _
   ByVal capType As LineCapType _
) As IReadOnlyList(Of Geometry)

Parameters

polylines: The polylines to buffer
distance: The buffer distance
side: The side of the polyline to create the buffer
capType: The line cap type

Return Value

List of geometries representing the side buffers

Exceptions

Exception	Description
System.ArgumentNullException	Geometries is null or empty
System.ArgumentException	The buffer distance must be a valid floating point number.
System.ArgumentException	The method is not implemented for LineCapType.Square.

Remarks

The spatial reference of the output geometries is the first not null or Unknown spatial reference found in the list of geometries. All other geometries are projected to this spatial reference, if necessary. If no such spatial reference is found, then the Unknown spatial reference is used if it is found in the list. Otherwise, the spatial reference is null.

Example

SideBuffer Many

SpatialReference spatialReference = SpatialReferenceBuilder.CreateSpatialReference(102010);
List<Coordinate2D> coordinates = new List<Coordinate2D>()
{
  new Coordinate2D(1200, 5800),
  new Coordinate2D(1400, 5800),
  new Coordinate2D(1400, 6000),
  new Coordinate2D(1300, 6000),
  new Coordinate2D(1300, 5700)
};

Polyline polyline1 = PolylineBuilderEx.CreatePolyline(coordinates, spatialReference);

coordinates.Clear();
coordinates.Add(new Coordinate2D(1400, 6050));
coordinates.Add(new Coordinate2D(1600, 6150));
coordinates.Add(new Coordinate2D(1800, 6050));

Polyline polyline2 = PolylineBuilderEx.CreatePolyline(coordinates, spatialReference);
List<Polyline> polylines = new List<Polyline>() { polyline1, polyline2 };
IReadOnlyList<Geometry> outGeometries = GeometryEngine.Instance.SideBuffer(polylines, 10, LeftOrRightSide.RightSide, LineCapType.Round);

Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

Reference

GeometryEngine Class
GeometryEngine Members
Overload List

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