Fwd: RE: [vtkusers] vtkVolumeReader

[Amy Henderson]

I am forwarding a copy of our discussion so far to the users list.

- Amy


>Vetria,
>
>I just noticed the you replied only to me and not the the vtkusers list. 
>Please keep the discussion on the list so other people can help if 
>necessary and so there is a record of the solution to this problem if 
>other people encounter the same thing.
>
>What kind of data are you trying to load? Depending on the type of your 
>data, you might want to try loading it using one of the subclasses of 
>vtkImageReader2. These readers can handle 3D data by reading in a series 
>of 2D slices.
>
>- Amy
>
>At 02:32 PM 4/5/2004, Vetria Byrd wrote:
>>When I try creating an instance of vtkVolume16Reader the code complies 
>>with no errors but when I try to run it I get:
>>
>>ERROR: In C:\Program Files\vtk42\IO\vtkVolume16Reader.cxx, line 375
>>vtkVolume16Reader (0x022B5400): Error reaading raw pgm data!
>>
>>So, I thought I would try vtkVolumeReader.
>>
>>Vetria
>>
>>-----Original Message-----
>>From: Amy Henderson [mailto:amy.henderson at kitware.com]
>>Sent: Monday, April 05, 2004 12:14 PM
>>To: byrdv at cis.uab.edu; 'Amy Henderson'
>>Subject: RE: [vtkusers] vtkVolumeReader
>>
>>Did you intend to create an instance of vtkVolume16Reader? 
>>vtkVolumeReader has a pure virtual method, so you can't instantiate it; 
>>you have to create an instance of one of its concrete subclasses (e.g., 
>>vtkVolume16Reader, which I see in your list of include files).
>>
>>- Amy
>>
>>At 01:08 PM 4/5/2004, Vetria Byrd wrote:
>>
>>Yes.
>>
>>Here's the entire file:
>>
>>//
>>// This example reads a volume dataset, extracts an isosurface and 
>>displays it.
>>//
>>
>>#include "vtkRenderer.h"
>>#include "vtkRenderWindow.h"
>>#include "vtkRenderWindowInteractor.h"
>>#include "vtkVolume16Reader.h"
>>#include "vtkVolumeReader.h"
>>#include "vtkObject.h"
>>#include "vtkMarchingCubes.h"
>>#include "vtkPolyDataMapper.h"
>>#include "vtkActor.h"
>>#include "vtkOutlineFilter.h"
>>#include "vtkCamera.h"
>>#include "vtkProperty.h"
>>#include "vtkPolyDataNormals.h"
>>#include "vtkContourFilter.h"
>>
>>int main (int argc, char **argv)
>>{
>>   if (argc < 2)
>>     {
>>       cout << "Usage: " << argv[0] << " DATADIR/cube/slice" << endl;
>>     return 1;
>>     }
>>
>>
>>   vtkRenderer *ren = vtkRenderer::New();
>>   vtkRenderWindow *renWin = vtkRenderWindow::New();
>>     renWin->AddRenderer(ren);
>>   vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
>>     iren->SetRenderWindow(renWin);
>>
>>  *vtkVolumeReader *volReader = vtkVolumeReader::New();
>>     volReader->SetImageRange (1,5);
>>     volReader->SetFilePrefix (argv[1]);
>>     volReader->SetDataSpacing (1,1,1);
>>     volReader->Update();
>>
>>   // An isosurface, or contour value of 1 is known to correspond to the 
>> object.
>>   vtkMarchingCubes *iso =vtkMarchingCubes::New();
>>      iso->SetInput(volReader->GetOutput() );
>>      iso->SetValue(0,1);
>>
>>   vtkPolyDataMapper *isoMapper = vtkPolyDataMapper::New();
>>       isoMapper->SetInput(iso->GetOutput() );
>>       isoMapper->ScalarVisibilityOff();
>>
>>   vtkActor *isoActor = vtkActor::New();
>>       isoActor->SetMapper(isoMapper);
>>
>>   vtkOutlineFilter *outline = vtkOutlineFilter::New();
>>       outline->SetInput( (vtkDataSet *) volReader->GetOutput() );
>>
>>    vtkPolyDataMapper *outlineMapper = vtkPolyDataMapper::New();
>>       outlineMapper->SetInput(outline->GetOutput() );
>>
>>    vtkActor *outlineActor = vtkActor::New();
>>       outlineActor->SetMapper(outlineMapper);
>>       outlineActor->VisibilityOff();
>>
>>    //
>>    // Add the actors to the renderer, set the background and size
>>    //
>>    ren->AddActor(outlineActor);
>>    ren->AddActor(isoActor);
>>    ren->SetBackground(0.2,0.3,0.4);
>>    renWin->SetSize(450,450);
>>    ren->GetActiveCamera()->Elevation(90);
>>    ren->GetActiveCamera()->SetViewUp(0,0,-1);
>>
>>    iren->Initialize();
>>
>>    // render the image
>>    iren->Start();
>>
>>
>>    return 0;
>>}
>>
>>-----Original Message-----
>>From: Amy Henderson [mailto:amy.henderson at kitware.com]
>>Sent: Monday, April 05, 2004 11:59 AM
>>To: byrdv at cis.uab.edu; 'vtkusers'
>>Subject: Re: [vtkusers] vtkVolumeReader
>>
>>Vetria,
>>
>>Did you include the vtkVolumeReader header file (#include 
>>"vtkVolumeReader.h")?
>>
>>- Amy
>>
>>At 12:47 PM 4/5/2004, Vetria Byrd wrote:
>>
>>I have manually created data files that consists of zero's and one's (no 
>>header info) to resemble a (5x5x5) 3D cube.
>>There are 5 data files.  When I try to use vtkVolumeReader I get the 
>>following error message:
>>
>>error C2440: 'initializing' : cannot convert from 'class vtkObject *' to 
>>'class vtkVolumeReader *'
>>         Types pointed to are unrelated; conversion requires 
>> reinterpret_cast, C-style cast or function-style cast
>>
>>This is where the error occurs:
>>:
>>:
>>
>>   vtkVolumeReader *volReader = vtkVolumeReader::New();
>>     volReader->SetImageRange (1,5);
>>     volReader->SetFilePrefix (argv[1]);
>>     volReader->SetDataSpacing (1,1,1);
>>     volReader->Update();
>>
>>Any assistance will be greatly appreciated.
>>Thanks,
>>_______________
>>Vetria L. Byrd
>>
>>
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