How to sync UCS with current view like command UCS+V

csharp

How to sync UCS with current view like command UCS+VBy Philippe Leefsma

Here is how to achieve the same functionality than command UCS+V using .Net API:

//////////////////////////////////////////////////////////////////

// Use: Sync UCS with Current view like command UCS V

// Author: Philippe Leefsma, September 2011

//////////////////////////////////////////////////////////////////

[CommandMethod("UcsV"

public static void UcsV()

{

    Document doc = Application.DocumentManager.MdiActiveDocument;

    Database db = doc.Database;

    Editor ed = doc.Editor;

    Autodesk.AutoCAD.GraphicsSystem.Manager mng =

        doc.GraphicsManager;

    short cvport = (short)Application.GetSystemVariable("CVPORT");

    Autodesk.AutoCAD.GraphicsSystem.View view =

        mng.GetGsView(cvport, true);

    Vector3d direction = (view.Target - view.Position);

    direction = direction.MultiplyBy(1 / direction.Length);

    Vector3d upVector = view.UpVector;

    upVector = upVector.MultiplyBy(1 / upVector.Length);

    Vector3d xAxis = direction.CrossProduct(upVector);

    Matrix3d ucs = Matrix3d.AlignCoordinateSystem(

        new Point3d(0, 0, 0),

        Vector3d.XAxis, Vector3d.YAxis, Vector3d.ZAxis,

        new Point3d(0, 0, 0), xAxis, upVector, direction);

    ed.CurrentUserCoordinateSystem = ucs;

}