[vtkusers] Dose mapping on a CT image

[Abhishek Gupta]

But Jothy, I use C# .Net panels for all painting related stuff. Hence, I
require to get points in an order using which i can generate a path to plot.

Is there a way, I can do this?

On Thu, Oct 11, 2012 at 3:01 PM, Jothybasu Selvaraj <jothybasu at gmail.com>wrote:

> If you just want to draw a line from the output of vtkContourFilter, you
> simply set the output of contourFilter to vtkPolyDataMapper.
>
>
> On Wed, Oct 10, 2012 at 5:24 PM, Abhishek Gupta <abhishek at meddiff.com>wrote:
>
>> Hello Jothy,
>>
>> I am using following code to generate contours:
>>
>> ---------------------------------------------------------------------------------
>>        //Set vktImage.
>> vtkImageData* _vtkImage = vtkImageData::New();
>>  _vtkImage->SetDimensions(dfData->cols,dfData->rows,1);
>> double spacing[3] = { 2.5,2.5,1.0 }; // TODO: fix me
>>  _vtkImage->SetSpacing(spacing);
>> _vtkImage->GetPointData()->SetScalars(scalars);
>>  /*double bounds[6];
>> _vtkImage->GetBounds(bounds);*/
>> _vtkImage->Update();
>>  _vtkImage->Print(cerr);
>>
>> // Generate contours.
>> vtkContourFilter* contour=vtkContourFilter::New();
>>  contour->SetInput(_vtkImage);
>> contour->GenerateValues(1,level,level);
>>  contour->Update();
>> contour->Print(cerr);
>> contour->GetOutput()->GetPoints()->Print(cerr);
>>  int numOfPoints=contour->GetOutput()->GetPoints()->GetNumberOfPoints();
>> if(numOfPoints>0)
>>  {
>>  for(int i=0;i<numOfPoints;i++)
>>  {
>> dosePlotPoint p;//=new dosePlotPoint();
>> p.x=contour->GetOutput()->GetPoints()->GetPoint(i)[0];
>>  p.y=contour->GetOutput()->GetPoints()->GetPoint(i)[1];
>> outPoints.push_back(p);
>>  }
>> }
>>
>> --------------------------------------------------------------------------------------------------
>> I wish to obtain contour points in a manner that I can draw a path
>> through those points.
>>
>> Regards,
>> Abhishek Gupta.
>>
>> On Wed, Oct 10, 2012 at 7:29 PM, Jothybasu Selvaraj <jothybasu at gmail.com>wrote:
>>
>>> I don't know how you are obtaining the points form vtkContourFilter.
>>> What exactly do you want to do?
>>>
>>> I think; vtkCOntourFilter can generate multiple contour lines depending
>>> on the GenerateValues() parameters.
>>>
>>> On Wed, Oct 10, 2012 at 2:52 PM, abhishek <abhishek at meddiff.com> wrote:
>>>
>>>> Dear Jothy,
>>>>
>>>> I applied your suggestions in my code and spacing problem seems to be
>>>> addressed. Now I have plotted a path over the points generated by contour
>>>> filter. Please see the attached image.
>>>>
>>>> I saw the output of vtkContourFilter and it is returning points for
>>>> vtkLines. How can I get only outline points?
>>>>
>>>> Regards,
>>>> Abhishek.
>>>>
>>>> *Untitled.png* (79K) Download Attachment<http://vtk.1045678.n5.nabble.com/attachment/5716583/0/Untitled.png>
>>>>
>>>> ------------------------------
>>>> View this message in context: Dose mapping on a CT image<http://vtk.1045678.n5.nabble.com/Dose-mapping-on-a-CT-image-tp5716583.html>
>>>> Sent from the VTK - Users mailing list archive<http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html>at Nabble.com.
>>>>
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>>>
>>>
>>> --
>>> Jothybasu Selvaraj
>>> PhD Student
>>> University of Liverpool
>>> UK
>>>
>>>
>>
>
>
> --
> Jothybasu Selvaraj
> PhD Student
> University of Liverpool
> UK
>
>
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