[vtkusers] vtkImageViewer2 image display

[Anka Kochanowska]

Have you included vtkRenderer.h?
Anka

Oleksandr Dzyubak wrote:
> Hi Tobias,
>
> I tried your suggestion and got compiler errors below.
>
> myProject.cxx: In function ‘int main(int, char**)’:
> myProject.cxx:56: error: invalid use of incomplete type ‘struct 
> vtkRenderer’
> /usr/bin/../include/vtk-5.0/vtkRenderWindowInteractor.h:46: error: 
> forward declaration of ‘struct vtkRenderer’
> make[2]: *** [CMakeFiles/myProject.dir/myProject.o] Error 1
> make[1]: *** [CMakeFiles/myProject.dir/all] Error 2
> make: *** [all] Error 2
>
> What am I doing wrong?
>
> Alex
>
> tobse wrote:
>> Hi Alex,
>>
>> you can setup the active camera via the renderer of the imageviewer.
>> viewer->GetRenderer()->GetActiveCamera()->SetFocalPoint(x,y,z);
>> Doesn't look nice but works...
>>
>> tobse
>>
>>
>> Oleksandr Dzyubaka wrote:
>>  
>>> vtkusers-request at vtk.org wrote:
>>>    
>>>> Date: Fri, 4 Apr 2008 02:11:46 -0700 (PDT)
>>>> From: tobse <tobias.meisel at phacon-leipzig.de>
>>>> Subject: Re: [vtkusers] vtkImageViewer2 image display
>>>> To: vtkusers at vtk.org
>>>> Message-ID: <16489656.post at talk.nabble.com>
>>>> Content-Type: text/plain; charset=us-ascii
>>>>
>>>>
>>>> Hi,
>>>>
>>>> I calculated the FocalPoint and the Position of the camera with 
>>>> respect
>>>> to
>>>> the image size
>>>>
>>>> 1. determine the size of the image in x and y direction (using the 
>>>> extent
>>>> and the spacing of the input image)
>>>> 2. based on the larger axes, you can modify the view angle or the
>>>> distance
>>>> of the camera
>>>>               angle = Camera->GetViewAngle();
>>>>             distance= SizeOfLargerAxes/2/tan(angle/2);
>>>> 3. Determine the middle of the image
>>>> 4. Focus the camera to the middle of the image
>>>>                   Camera->SetFocalPoint(xmax/2, ymax/2, 0);
>>>>              Camera->SetPosition(xmax/2,ymax/2,distance);
>>>>
>>>> This will work as long as the image is in the xy-plane , with z=0.
>>>>
>>>> hope this will help
>>>>
>>>> tobse
>>>>         
>>> Hi Tobias,
>>>
>>> Thanks for your answer.
>>> I understand that the remedy against getting my image in a render 
>>> window
>>> so tiny is to preset the focal points and position before calling 
>>> methods below.
>>>
>>> viewer->Render();
>>> renderWindowInteractor->Start();
>>>
>>> I try to use vtkImageViewer2 class and as a starting point
>>> I use the slightly modified code from GettingStarted-II attached below.
>>> Searching the classes used in the code, I cannot find where I could
>>> access the camera methods to preset the values.
>>>
>>> Where is it?
>>>
>>> Thanks,
>>>
>>> Alex
>>>
>>>
>>> #include "itkImage.h"
>>> #include "itkImageFileReader.h"
>>> #include "itkImageToVTKImageFilter.h"
>>> #include "vtkRenderWindowInteractor.h"
>>> #include "vtkImageViewer2.h"
>>>
>>> int main( int argc, char **argv) {
>>> typedef itk::Image <signed short, 3> ImageType;
>>>
>>> typedef itk::ImageFileReader <ImageType> ReaderType;
>>> typedef itk::ImageToVTKImageFilter <ImageType> ConnectorType;
>>>
>>> ReaderType::Pointer reader= ReaderType::New();
>>> ConnectorType::Pointer connector= ConnectorType::New();
>>> reader->SetFileName( argv[1]);
>>> connector->SetInput( reader->GetOutput() );
>>> vtkImageViewer2* viewer= vtkImageViewer2::New();
>>>
>>> vtkRenderWindowInteractor* renderWindowInteractor =
>>> vtkRenderWindowInteractor::New();
>>>
>>> viewer->SetupInteractor( renderWindowInteractor);
>>> viewer->SetInput( connector->GetOutput() );
>>>
>>> viewer->SetSlice(3);
>>> viewer->SetSize(300, 300);
>>>
>>> viewer->Render();
>>> viewer->SetColorWindow( 255);
>>> viewer->SetColorLevel( 128);
>>>
>>> renderWindowInteractor->Start();
>>> return 0;
>>> }
>>>
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>>>
>>>     
>>
>>   
>
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