Step3.cpp File Reference

#include "QmitkRegisterClasses.h"
#include "QmitkRenderWindow.h"
#include <mitkDataNodeFactory.h>
#include <mitkStandaloneDataStorage.h>
#include <mitkProperties.h>
#include <mitkTransferFunction.h>
#include <mitkTransferFunctionProperty.h>
#include <mitkRenderingManager.h>
#include <itksys/SystemTools.hxx>
#include <QApplication>
#include "QtTesting.h"

Go to the source code of this file.

Functions
int	main (int argc, char *argv[])
	Change the type of display to 3D.

---

Function Documentation

int main	(	int	argc,
		char *	argv[]
	)

Change the type of display to 3D.

As in Step2, load one or more data sets (many image, surface and other formats), but display it in a 3D view. The QmitkRenderWindow is now used for displaying a 3D view, by setting the used mapper-slot to Standard3D. Since volume-rendering is a (rather) slow procedure, the default is that images are not displayed in the 3D view. For this example, we want volume-rendering, thus we switch it on by setting the Boolean-property "volumerendering" to "true".

Definition at line 44 of file Step3.cpp.

References mitk::RenderingManager::GetInstance(), mitk::RenderWindowBase::GetRenderer(), mitk::TransferFunctionProperty::New(), mitk::TransferFunction::New(), mitk::BoolProperty::New(), mitk::DataNodeFactory::New(), mitk::StandaloneDataStorage::New(), QmitkRegisterClasses(), QtTesting(), mitk::VtkPropRenderer::SetDataStorage(), mitk::VtkPropRenderer::SetMapperID(), mitk::BaseData::SetProperty(), and mitk::BaseRenderer::Standard3D.

{
  QApplication qtapplication( argc, argv );
  if(argc<2)
  {
    fprintf( stderr, "Usage:   %s [filename1] [filename2] ...\n\n", itksys::SystemTools::GetFilenameName(argv[0]).c_str() );
    return 1;
  }

  // Register Qmitk-dependent global instances
  QmitkRegisterClasses();

  //*************************************************************************
  // Part I: Basic initialization
  //*************************************************************************

  // Create a DataStorage  
  mitk::StandaloneDataStorage::Pointer ds = mitk::StandaloneDataStorage::New();

  //*************************************************************************
  // Part II: Create some data by reading files
  //*************************************************************************
  int i;
  for(i=1; i<argc; ++i)
  {
    // For testing
    if(strcmp(argv[i], "-testing")==0) continue;

    // Create a DataNodeFactory to read a data format supported
    // by the DataNodeFactory (many image formats, surface formats, etc.)
    mitk::DataNodeFactory::Pointer nodeReader=mitk::DataNodeFactory::New();
    const char * filename = argv[i];
    try
    {
      nodeReader->SetFileName(filename);
      nodeReader->Update();

      //*********************************************************************
      // Part III: Put the data into the datastorage
      //*********************************************************************

      // Since the DataNodeFactory directly creates a node,
      // use the datastorage to add the read node
      mitk::DataNode::Pointer node = nodeReader->GetOutput();
      ds->Add(node);

      // *********************************************************
      // ****************** START OF NEW PART 1 ******************
      // *********************************************************

      //*********************************************************************
      // Part IV: We want all images to be volume-rendered
      //*********************************************************************

      // Check if the data is an image by dynamic_cast-ing the data
      // contained in the node. Warning: dynamic_cast's are rather slow,
      // do not use it too often!
      mitk::Image::Pointer image = dynamic_cast<mitk::Image*>(node->GetData());
      if(image.IsNotNull())
      {
        // Set the property "volumerendering" to the Boolean value "true"
        node->SetProperty("volumerendering", mitk::BoolProperty::New(true));

        // Create a transfer function to assign optical properties (color and opacity) to grey-values of the data
        mitk::TransferFunction::Pointer tf = mitk::TransferFunction::New();
        tf->InitializeByMitkImage ( image );

        // Set the color transfer function AddRGBPoint(double x, double r, double g, double b)
        tf->GetColorTransferFunction()->AddRGBPoint ( tf->GetColorTransferFunction()->GetRange() [0], 1.0, 0.0, 0.0 );
        tf->GetColorTransferFunction()->AddRGBPoint ( tf->GetColorTransferFunction()->GetRange() [1], 1.0, 1.0, 0.0 );

        // Set the piecewise opacity transfer function AddPoint(double x, double y)
        tf->GetScalarOpacityFunction()->AddPoint ( 0, 0 );
        tf->GetScalarOpacityFunction()->AddPoint ( tf->GetColorTransferFunction()->GetRange() [1], 1 );

        node->SetProperty ( "TransferFunction", mitk::TransferFunctionProperty::New ( tf.GetPointer() ) );
      }


      // *********************************************************
      // ******************* END OF NEW PART 1 *******************
      // *********************************************************
    }
    catch(...)
    {
      fprintf( stderr, "Could not open file %s \n\n", filename );
      exit(2);
    }
  }

  //*************************************************************************
  // Part V: Create window and pass the tree to it
  //*************************************************************************

  // Create a renderwindow
  QmitkRenderWindow renderWindow;

  // Tell the renderwindow which (part of) the datastorage to render
  renderWindow.GetRenderer()->SetDataStorage(ds);

  // *********************************************************
  // ****************** START OF NEW PART 2 ******************
  // *********************************************************
  // Use it as a 3D view!
  renderWindow.GetRenderer()->SetMapperID(mitk::BaseRenderer::Standard3D);

  // *********************************************************
  // ******************* END OF NEW PART 2 *******************
  // *********************************************************
  
  //*************************************************************************
  // Part VI: Qt-specific initialization
  //*************************************************************************
  renderWindow.show();
  renderWindow.resize( 256, 256 );

  mitk::RenderingManager::GetInstance()->RequestUpdateAll();

  // for testing
  #include "QtTesting.h"
  if(strcmp(argv[argc-1], "-testing")!=0)
    return qtapplication.exec();
  else
    return QtTesting();
}