MatrixFactoryRotate Method

public static Matrix Rotate(
	double Angle,
	Vector Axis
)

Public Shared Function Rotate ( 
	Angle As Double,
	Axis As Vector
) As Matrix

using Tekla.Structures.Geometry3d;
using Tekla.Structures.Model;
using Tekla.Structures.Model.UI;

public class Example
{
       private void RotatePickedBeamStartPoint()
       {
           Model myModel = new Model();
           Picker myPicker = new Picker();
           Beam myBeam = (Beam)myPicker.PickObject(Picker.PickObjectEnum.PICK_ONE_PART, "Pick Beam");
           CoordinateSystem beamCoordSys = myBeam.GetCoordinateSystem();

           Point origin = myBeam.EndPoint;
           Point XPoint = new Point(beamCoordSys.AxisX.X, beamCoordSys.AxisX.Y, beamCoordSys.AxisX.Z);
           Vector Zvector = beamCoordSys.AxisY.Cross(beamCoordSys.AxisX);
           TransformationPlane plane = new TransformationPlane((new CoordinateSystem(origin, beamCoordSys.AxisX, Zvector)));
           myModel.GetWorkPlaneHandler().SetCurrentTransformationPlane(plane);
           myBeam.Select();

           Vector ZVector = new Vector(0, 0, 1);

           double rotationRadian = 0.785398; // 45°
           Matrix matrix = MatrixFactory.Rotate(rotationRadian, ZVector);
           myBeam.StartPoint = matrix.Transform(myBeam.StartPoint);
           myBeam.Modify();
           myModel.CommitChanges();
       }
}