[vtkusers] ray casting by VTK

[Aashish Chaudhary]

On Fri, Nov 8, 2013 at 4:38 AM, zahra sahaf <sce2020sahaf at yahoo.com> wrote:

> I am actually new to VTK. As a course project, I am going to implement a
> simple ray caster which could reads raw file and render that, my code is as
> follows: (unfortunately I did not get result,
>

Did you not see antything? Of you saw something but it didnot look right?

- Aashish



> I don't know what's the problem) Please help me :(
> Any help would be appreciated.
>
> vtkRenderer ren1 = vtkRenderer.New();
>             vtkRenderWindow renwin = vtkRenderWindow.New();
>             vtkRenderWindowInteractor iren =
> vtkRenderWindowInteractor.New();
>             iren.SetRenderWindow(renwin);
>             ren1.SetBackground(0, 0, 0);
>             renwin.SetSize(600, 600);
>
>             ///////////  Read in data and add extract filters
>             string filePath =
> System.IO.Path.GetFullPath(@"C:\Users\Sepid\Desktop\data\MRI-woman.raw");
>             Debug.WriteLine(filePath);
>             vtkImageReader reader = vtkImageReader.New();
>             Debug.Write(filePath);
>             reader.SetFileName(filePath);
>             reader.SetDataScalarTypeToUnsignedChar();
>             reader.SetDataByteOrderToLittleEndian();
>             reader.SetDataOrigin(0, 0, 0);
>             reader.SetFileDimensionality(3);
>             reader.SetDataSpacing(1, 1.5, 1);
>             reader.SetDataExtent(0, 255, 0, 108, 0, 255);
>             reader.Update();
>             //////////////////////////////////////////////////
>             vtkVolumeRayCastMapper volumeMapper =
> vtkVolumeRayCastMapper.New();
>             volumeMapper.SetInputConnection(reader.GetOutputPort());
>
>             vtkVolumeRayCastCompositeFunction compositeFunction =
> vtkVolumeRayCastCompositeFunction.New();
>
>             volumeMapper.SetVolumeRayCastFunction(compositeFunction);
>             volumeMapper.SetSampleDistance(0.25);
>
>             //////////////////////////////////////////////////
>             vtkPiecewiseFunction opacityTransferFunction = new
> vtkPiecewiseFunction();
>             opacityTransferFunction.AddPoint(1000, 0);
>             opacityTransferFunction.AddPoint(1500, 0.2);
>             opacityTransferFunction.AddPoint(2000, 0);
>             ////////////////////////////////////////////////////
>             vtkColorTransferFunction colorTransferFunction = new
> vtkColorTransferFunction();
>             colorTransferFunction.AddRGBPoint(1000, 0, 0, 0);
>             colorTransferFunction.AddRGBPoint(1500, 1, 0.5, 0.5);
>             ///////////////////////////////////////////////////
>             vtkVolumeProperty volumeProperty = new vtkVolumeProperty();
>             volumeProperty.SetColor(colorTransferFunction);
>             volumeProperty.SetScalarOpacity(opacityTransferFunction);
>             ///////////////////////////////////////////////////
>             vtkVolume volume = new vtkVolume();
>             volume.SetMapper(volumeMapper);
>             volume.SetProperty(volumeProperty);
>
>            ren1.AddVolume(volume);
>            // ren1.AddViewProp(volume);
>
>             iren.Initialize();
>             iren.Start();
>             renwin.Render();
>
>
> Bests,
> Zahra
>
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-- 
| Aashish Chaudhary
| R&D Engineer
| Kitware Inc.
| www.kitware.com
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