ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Geometry Namespace / IGeometryEngine Interface / Rotate Method
The geometry to rotate. If the geometry is an Envelope, then it will be converted to a polygon.
The origin around which the geometry will be rotated.
The rotation angle in radians.
Example Version

Rotate Method (IGeometryEngine)
Rotates the geometry about the specified origin point.
Syntax

Parameters

geometry
The geometry to rotate. If the geometry is an Envelope, then it will be converted to a polygon.
origin
The origin around which the geometry will be rotated.
rotationAngle
The rotation angle in radians.

Return Value

The rotated geometry. If the input geometry is an Envelope, then a polygon is returned. If the input geometry is empty, then an empty geometry is returned.
Exceptions
ExceptionDescription
Either geometry or origin or both are null.
The method is not implemented for GeometryBag.
Incompatible spatial references between the input geometries.
Example
Rotate a MapPoint
MapPoint pt = MapPointBuilderEx.CreateMapPoint(1.0, 3.0);
MapPoint rotatePt = MapPointBuilderEx.CreateMapPoint(3.0, 3.0);

Geometry result = GeometryEngine.Instance.Rotate(pt, rotatePt, Math.PI / 2);
// result point is (3, 1)
Rotate a Polyline
// rotate a polyline

MapPoint fixedPt = MapPointBuilderEx.CreateMapPoint(3.0, 3.0);

List<MapPoint> pts = new List<MapPoint>();
pts.Add(MapPointBuilderEx.CreateMapPoint(1.0, 1.0));
pts.Add(MapPointBuilderEx.CreateMapPoint(1.0, 5.0));
pts.Add(MapPointBuilderEx.CreateMapPoint(5, 5));
pts.Add(MapPointBuilderEx.CreateMapPoint(5.0, 1.0));
Polyline polyline = PolylineBuilderEx.CreatePolyline(pts);

Polyline rotated = GeometryEngine.Instance.Rotate(polyline, fixedPt, Math.PI / 4) as Polyline;  // rotate 45 deg
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also