[vtkusers] transform using vtkboxwidget ,

[Ali Habib]

Dear All,

I am using vtkboxwidget,and vtkclippolydata  with two vtkactor.

the problem is that the transformation make the selected actor to be far
from the vtk box widget , how to keep it withen the vtkboxwidget boundry

I use the following code . how to fix this problem , attached is the photo
of the output

        public Form1()
        {
            InitializeComponent();


 this.AddInputToWindow(this.vtkFormsWindowControl1.GetRenderWindow() );


        }
            void AddInputToWindow(vtk.vtkRenderWindow renWin )
        {
            vtk.vtkDICOMImageReader VDR = new vtk.vtkDICOMImageReader();
            VDR.SetDirectoryName(@"G:\Master
Degree\DataSet\case2\DICOM\PA1\ST1\SE2");
            VDR.SetDataOrigin(0, 0, 0);
            VDR.Update();

            // decrease the dataset data for large data preprocessing

            vtkImageShrink3D VIS = new vtkImageShrink3D();
            VIS.SetShrinkFactors(2, 2, 2);
            VIS.SetInputConnection(VDR.GetOutputPort());
            VIS.Update();

            vtkImageThreshold VIT = new vtkImageThreshold();
            VIT.ThresholdBetween(200, 2000);
            VIT.SetInputConnection(VIS.GetOutputPort());
            VIT.Update();

            ///// Start the creation of volume rendering

            //1. Gget the range of data
            vtk.vtkImageChangeInformation VIC = new
vtk.vtkImageChangeInformation();
            VIC.SetInput(VDR.GetOutput());
            VIC.CenterImageOn();
            VIC.Update();

            vtk.vtkImageData VoxelData = new vtk.vtkImageData();
            VoxelData = VIC.GetOutput();

            double[] metaScalarRange = VoxelData.GetScalarRange();


            // Render the skin - Soft tissue
            double isovalue = 500;


            vtkContourFilter skinExtractor = new vtkContourFilter();
            skinExtractor.SetInputConnection(VIT.GetOutputPort());
            skinExtractor.SetValue(0, isovalue);
            skinExtractor.ComputeGradientsOn();
            skinExtractor.Update();


            planes = new vtkPlanes();

            clipper = new vtkClipPolyData();
            clipper.SetInput(skinExtractor.GetOutput());
            //clipper.SetClipFunction(planes);
            clipper.InsideOutOn();
          //  clipper.Update();

            // Select only the region of interest
            vtk.vtkPolyDataMapper SourceMapper = new
vtk.vtkPolyDataMapper();
            SourceMapper.SetInput(skinExtractor.GetOutput());
            SourceMapper.ScalarVisibilityOff();

            vtk.vtkPolyDataMapper SelectionMapper = new
vtk.vtkPolyDataMapper();
            SelectionMapper.SetInput(clipper.GetOutput());
            SelectionMapper.ScalarVisibilityOff();
            SourceActor = new vtk.vtkLODActor();
            SelectActor = new vtkLODActor();


            //SourceActor.GetProperty().SetRepresentationToWireframe();

            SourceActor.GetProperty().SetColor(1, 0, 0);
            SourceActor.SetMapper(SourceMapper);

            SelectActor.GetProperty().SetColor(0, 1, 0);
            SelectActor.SetMapper(SelectionMapper);
            SelectActor.VisibilityOff();

            vtk.vtkRenderer ren1 = new vtk.vtkRenderer();
            renWin.AddRenderer(ren1);

            vtkRenderWindowInteractor iren = new
vtk.vtkRenderWindowInteractor();
            iren.SetRenderWindow(renWin);

            // The box widget observes the events invoked by the render
window
            // interactor.  These events come from user interaction in the
render
            //window.
            vtkBoxWidget boxWidget = new vtk.vtkBoxWidget();
            boxWidget.SetInteractor(iren);
            boxWidget.SetPlaceFactor(1.25);
           // boxWidget.ScalingEnabledOff();
            ren1.AddActor(SourceActor);
            ren1.AddActor(SelectActor);

            ren1.SetBackground(0.0f, 0.0f, 0.0f);
            renWin.AddRenderer(ren1);
            boxWidget.SetProp3D(SourceActor);
            boxWidget.PlaceWidget();
            boxWidget.AddObserver((uint)vtk.EventIds.InteractionEvent, new
vtk.vtkDotNetCallback(Cut_Object));
            boxWidget.AddObserver((uint)vtk.EventIds.EndInteractionEvent,
new vtk.vtkDotNetCallback(transfer_Object));
            boxWidget.On();
            GC.Collect();

        }
        static void Cut_Object(vtk.vtkObject obj, uint eventId, Object data,
IntPtr clientdata)
        {
            vtkBoxWidget widget = vtkBoxWidget.SafeDownCast(obj);
            if(! transfer)
                            {
                widget.GetPlanes(planes);
                clipper.SetClipFunction(planes);
                clipper.Update();
                SelectActor.SetUserTransform(t); SelectActor.VisibilityOn();


            }

        }
       static void transfer_Object(vtk.vtkObject obj, uint eventId, Object
data, IntPtr clientdata)
        {
            vtkBoxWidget widget = vtkBoxWidget.SafeDownCast(obj);

            if (transfer)
            {
                /*  //widget.ScalingEnabledOff();

                widget.GetTransform(t);
                SelectActor.SetUserTransform(t); SelectActor.VisibilityOn();
               widget.ScalingEnabledOn(); */

                vtkTransform boxTransform =new vtkTransform();
                widget.GetTransform(boxTransform);

                // remove the scaling from the transform before passing it
on
                double[] scale = boxTransform.GetScale();
                 boxTransform.Scale(1.0 / scale[0], 1.0 / scale[1], 1.0/
scale[2]);
                 boxTransform.RotateWXYZ(0, 0, 0, 0);

 SelectActor.SetUserTransform((vtkLinearTransform)boxTransform);

                SelectActor.SetPosition(boxTransform.GetPosition());

            }

        }
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