60000577 Change the Viewing direction using azimouth tilt and twist angles.

Summary

Change the Viewing direction using azimouth tilt  and twist angles.

Solution

In Version 6013 new methods was added in VectorDraw.Geometry.Matrix  object

        /// <summary>
        /// Modify this Matrix using the view direction vector.
        /// </summary>
        /// <param name="Direction">A Vector defines the camera point offset from the target point.</param>
        /// <param name="twist">Rotation of the created matrix from Direction , about Z in radians in clockwise direction.</param>
        void SetToViewDirection(Vector Direction, double twist);
        /// <summary>
        /// Modify this Matrix using azimouth, tilt  and twist angles that specify the view direction relative to World Coordinate System.
        /// </summary>
        /// <param name="azimouth">Watching angle on XY plane relative to X axis in radians in clockwise direction.</param>
        /// <param name="tilt">Vertical watching angle relative to XY plane in radians.</param>
        /// <param name="twist">Rotation of the created matrix from azimouth and tilt , about Z in radians in clockwise direction.</param>
        void SetToViewAngles(double azimouth, double tilt, double twist);
        /// <summary>
        /// Returns the View Direction and the Angles that define this Matrix.
        /// </summary>
        /// <param name="direction">A Vector defines the camera point offset from the target point.</param>
        /// <param name="azimouth">Watching angle on XY plane relative to X axis in radians in clockwise direction.</param>
        /// <param name="tilt">Vertical watching angle relative to XY plane in radians.</param>
        /// <param name="twist">Rotation of the created matrix from azimouth and tilt , about Z in radians in clockwise direction.</param>
        void GetWorldToViewProperties(out Vector direction, out double azimouth, out double tilt, out double twist);

Example in C#

                ////defining the viewing direction using azimouth tilt  and twist angles.
                vdFramedControl.BaseControl.ActiveDocument.Prompt("azimouth,tilt,twist in Degrees:");
                gPoint pt = vdFramedControl.BaseControl.ActiveDocument.ActionUtility.getUserPoint() as gPoint;
                vdFramedControl.BaseControl.ActiveDocument.Prompt(null);
                if (pt == null) return;
                double azimouth = pt.x;
                double tilt = pt.y;
                double twist = pt.z;
                Vector v;
                Matrix mm = new Matrix();
                mm.SetToViewAngles(Globals.DegreesToRadians(azimouth), Globals.DegreesToRadians(tilt), Globals.DegreesToRadians(twist));
                vdFramedControl.BaseControl.ActiveDocument.World2ViewMatrix = mm;
                vdFramedControl.BaseControl.ActiveDocument.Redraw(true);

                //Verify te values.
                vdFramedControl.BaseControl.ActiveDocument.World2ViewMatrix.GetWorldToViewProperties(out v, out azimouth, out tilt, out twist);
                twist = Globals.RadiansToDegrees(twist);
                tilt = Globals.RadiansToDegrees(tilt);
                azimouth = Globals.RadiansToDegrees(azimouth);
                vdFramedControl.BaseControl.ActiveDocument.Prompt("\r\n" + azimouth.ToString("0.0000") + "," + tilt.ToString("0.0000") + "," + twist.ToString("0.0000") + " --- " + v.ToString());
                vdFramedControl.BaseControl.ActiveDocument.Prompt(null);

Example in VB6 using Wrapper components and TLB Interops

''because in vectordraw wrapper we can not set the WorldToView Matrix directly but only with Axis3dRotations we use the VectorDraw_Professional(VectorDraw.Professional.tlb) and VectorDraw_Geometry(VectorDraw.Geometry.tlb) library to do this.
Dim globals As New vectordraw_geometry.GlobalsInterRop

Private Sub cmdGetView_Click()
    Dim document As VectorDraw_Professional.vdDocument
    Dim mat As vectordraw_geometry.Matrix

    Dim Angle_azimouth As Double
    Dim Angle_tilt As Double
    Dim Angle_twist As Double
    Dim viewdir As vectordraw_geometry.Vector
   
    Set document = VDraw1.ActiveDocument.WrapperObject
   
    Set mat = document.World2ViewMatrix
    mat.GetWorldToViewProperties viewdir, Angle_azimouth, Angle_tilt, Angle_twist
  
    azimouth.Text = globals.RadiansToDegrees(Angle_azimouth)
    tilt.Text = globals.RadiansToDegrees(Angle_tilt)
    twist.Text = globals.RadiansToDegrees(Angle_twist)
   
End Sub

Private Sub cmdRotate_Click()
    VDraw1.CommandAction.View3D "VROT"
End Sub

Private Sub cmdSetView_Click()
    Dim mat As New vectordraw_geometry.Matrix
    mat.SetToViewAngles globals.DegreesToRadians(CDbl(azimouth.Text)), globals.DegreesToRadians(CDbl(tilt.Text)), globals.DegreesToRadians(CDbl(twist.Text))

   
    Dim document As VectorDraw_Professional.vdDocument
    Set document = VDraw1.ActiveDocument.WrapperObject
    Set document.World2ViewMatrix = mat
   
    VDraw1.Redraw
End Sub

Private Sub Form_Load()
    ''set the showAxis on
    VDraw1.ShowWCSAxis = UCSICON_Show_Origin
    Call cmdSetView_Click
   
End Sub

 

 

Example in C++ 2005

#import "System.Drawing.tlb"
#import "C:\vdraw6\REDIS\x86\VectorDraw.Geometry.tlb"

void TestMatrixRotations()
{

 //Create a new matrix
 Cvdmatrix mat=m_Vdraw.CreateInstance(25);
 
 //rotate matrix about x,y,z
 mat.RotateX(m_Vdraw.GetUtility().geomDegreesToRad(30));
 mat.RotateY(m_Vdraw.GetUtility().geomDegreesToRad(40));
 mat.RotateZ(m_Vdraw.GetUtility().geomDegreesToRad(50));

 //get the interface of VectorDraw Framework manage object.
 VectorDraw_Geometry::IMatrixPtr vdfmat = mat.GetWrapperObject();
 VectorDraw_Geometry::IVectorPtr direction;
 double azimouth,_azimouth;
 double tilt,_tilt;
 double twist,_twist;
 CString str;

 /// Returns the View Direction and the Angles that define this Matrix.
   /// <param name="direction">A Vector defines the camera point offset from the target point.</param>
   /// <param name="azimouth">Watching angle on XY plane relative to X axis in radians in clockwise direction.</param>
   /// <param name="tilt">Vertical watching angle relative to XY plane in radians.</param>
   /// <param name="twist">Rotation of the created matrix from azimouth and tilt , about Z in radians in clockwise direction.</param>
 vdfmat->GetWorldToViewProperties(&direction,&azimouth,&tilt,&twist);
 _azimouth = m_Vdraw.GetUtility().geomRadToDegrees(azimouth);
 _tilt = m_Vdraw.GetUtility().geomRadToDegrees(tilt);
 _twist = m_Vdraw.GetUtility().geomRadToDegrees(twist);
 str.Format(_T("\nazimouth=%.3f,tilt=%.3f,twist=%.3f"),_azimouth,_tilt,_twist);
 OutputDebugString(str);

        /// Modify this Matrix using azimouth, tilt  and twist angles that specify the view direction relative to World Coordinate System.
        /// <param name="azimouth">Watching angle on XY plane relative to X axis in radians in clockwise direction.</param>
        /// <param name="tilt">Vertical watching angle relative to XY plane in radians.</param>
        /// <param name="twist">Rotation of the created matrix from azimouth and tilt , about Z in radians in clockwise direction.</param>

    vdfmat->SetToViewAngles(azimouth,tilt,twist);

 //Verify the azimouth,tilt and twist angles.
 vdfmat->GetWorldToViewProperties(&direction,&azimouth,&tilt,&twist);
 _azimouth = m_Vdraw.GetUtility().geomRadToDegrees(azimouth);
 _tilt = m_Vdraw.GetUtility().geomRadToDegrees(tilt);
 _twist = m_Vdraw.GetUtility().geomRadToDegrees(twist);
 str.Format(_T("\nazimouth=%.3f,tilt=%.3f,twist=%.3f"),_azimouth,_tilt,_twist);
 OutputDebugString(str);

}

 

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