ConstructPointFromAngleDistance Method

Constructs a point at a specified angle from the horizontal axis and a specified distance away from the input point.

Syntax

C#
Visual Basic (Declaration)

MapPoint ConstructPointFromAngleDistance( 
   MapPoint inputPoint,
   double angle,
   double distance,
   SpatialReference spatialReference
)

Function ConstructPointFromAngleDistance( _
   ByVal inputPoint As MapPoint, _
   ByVal angle As Double, _
   ByVal distance As Double, _
   Optional ByVal spatialReference As SpatialReference _
) As MapPoint

Parameters

inputPoint: The input point.
angle: The angle in radians measured counterclockwise from the horizontal axis.
distance: The distance. Cannot be negative. If the distance is equal to zero, then the output point will have the same xy-coordinates as the input point.
spatialReference: (Optional) The spatial reference of the output point. The default value is null.

Return Value

A point at the specified angle and distance.

Exceptions

Exception	Description
System.ArgumentException	The input point is null or empty.
System.ArgumentException	The distance is less than zero.

Remarks

No z, m or id attributes are derived in the output point.

Example

MapPoint inPoint = MapPointBuilder.CreateMapPoint(3, 4);
double angle = 0;
double distance = 10;

MapPoint outPoint = GeometryEngine.Instance.ConstructPointFromAngleDistance(inPoint, angle, distance);
// outPoint.X = 13
// outPoint.Y = 4

SpatialReference sr = SpatialReferences.WGS84;
inPoint = MapPointBuilder.CreateMapPoint(0, 0, sr);
angle = Math.PI;
distance = 1;

outPoint = GeometryEngine.Instance.ConstructPointFromAngleDistance(inPoint, angle, distance, sr);
// outPoint.X = -1
// outPoint.Y = 0

Requirements

Target Platforms: Windows 10, Windows 8.1

Reference

IGeometryEngine Interface
IGeometryEngine Members