ArcGIS Pro 2.7 API Reference Guide
Scale(Geometry,MapPoint,Double,Double) Method
Example 

ArcGIS.Core.Geometry Namespace > IGeometryEngine Interface > Scale Method : Scale(Geometry,MapPoint,Double,Double) Method
The geometry to scale.
The origin around which the geometry will be scaled.
The scale factor along the x-axis.
The scale factor along the y-axis.
Scales the geometry about the specified origin.
Syntax
Overloads Function Scale( _
   ByVal geometry As Geometry, _
   ByVal origin As MapPoint, _
   ByVal sx As Double, _
   ByVal sy As Double _
) As Geometry

Parameters

geometry
The geometry to scale.
origin
The origin around which the geometry will be scaled.
sx
The scale factor along the x-axis.
sy
The scale factor along the y-axis.

Return Value

The scaled geometry.
Exceptions
ExceptionDescription
Either geometry or origin or both are null or empty.
The method is not implemented for GeometryBag.
Incompatible spatial references between the input geometries.
Remarks

GeometryEngine Scale

Example
List<MapPoint> pts = new List<MapPoint>();
pts.Add(MapPointBuilder.CreateMapPoint(1.0, 1.0, 3.0));
pts.Add(MapPointBuilder.CreateMapPoint(1.0, 3.0, 3.0));
pts.Add(MapPointBuilder.CreateMapPoint(3, 3, 3.0));
pts.Add(MapPointBuilder.CreateMapPoint(3.0, 1.0, 3.0));

MapPoint midPt = MapPointBuilder.CreateMapPoint(1.5, 1.5);

// polyline
Polyline polyline = PolylineBuilder.CreatePolyline(pts);
// polyline.Length = 6
// polyline.Length3D = 0
Geometry g = GeometryEngine.Instance.Scale(polyline, midPt, 0.5, 0.5);
Polyline resultPolyline = g as Polyline;
// resultPolyline.length  = 3
// resultPolyline.Points[0] = 1.25, 1.25, 3
// resultPolyline.Points[1] = 1.25, 2.25, 3
// resultPolyline.Points[2] = 2.25, 2.25, 3
// resultPolyline.Points[3] = 2.25, 1.25, 3

// 3D point - scale in 3d
MapPoint midPtZ = MapPointBuilder.CreateMapPoint(1.5, 1.5, 1);
g = GeometryEngine.Instance.Scale(polyline, midPtZ, 0.5, 0.5, 0.25);
resultPolyline = g as Polyline;
// resultPolyline.Points[0] = 1.25, 1.25, 1.5
// resultPolyline.Points[1] = 1.25, 2.25, 1.5
// resultPolyline.Points[2] = 2.25, 2.25, 1.5
// resultPolyline.Points[3] = 2.25, 1.25, 1.5
Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

IGeometryEngine Interface
IGeometryEngine Members
Overload List