[Paraview] Adding a Reader

[Dave Semeraro]

Hello,

I am trying to add a new reader to paraview. I am using paraview version 
2.2.1 on a
Fedora Core 2.0 linux distro. Paraview builds fine. I am following the 
instructions in
the paraview guide version 1.8 and the instructions in the PVLocal 
directory. I was
able to compile the "local cone source" example. When I import the package into
paraview it works fine.

As a first step, I wrote a new reader and tested it in VTK. The new reader 
builds a structured points dataset. I then copied the new reader .h and 
.cxx file into the
PVLocal directory and made the recommended changes in the Cmake and xml
files. I also included the required config files in my .cxx file. I am able 
to compile the
new reader and create a shared library but the shared library has an undefined
symbol corresponding to my reader. Paraview does not like that. When I
try to import the package I get an error. I have included the header file 
for my
reader and the two xml files with this message. If anyone sees what I am doing
wrong a hint would be greatly appreciated.

Regards,
Dave
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/*
	vtkVOLBReader class 
	Dave Semeraro
	October 2005
	NCSA

*/
// .NAME vtkVOLBReader - binary image file reader for VOLB datasets
// .SECTION Description
//  vtkVOLBReader is a vtkImageReader that reads SDSC MeshViewer
//  input datasets. VOLB data are basically stacks of images in a
//  single 3d file. The header consists of 17 Bytes. The first
//  five bytes are: "VOLB\n" This is followed by the data dimensions
//  in three 4 byte integers. This is followed by the voxel data
//  that consists of 4 byte RGBA values per voxel. 
//
//  .SECTION See Also
//  vtkJPEGReader vtkPNGReader vtkImageReader2 vtkGESignaReader
#ifndef __vtkVOLBReader_h
#define __vtkVOLBReader_h

#include "vtkPVLocalConfigure.h"
#include "vtkStructuredPointsSource.h"
#include <cstring>
#include <fstream>
using std::ifstream;

class VTK_PVLocal_EXPORT vtkVOLBReader : public vtkStructuredPointsSource 
{
public:
  vtkTypeRevisionMacro(vtkVOLBReader,vtkStructuredPointsSource);
  static vtkVOLBReader *New();
  virtual void PrintSelf(ostream& os, vtkIndent indent);
  // Description:
  // Specify file name of file
  vtkSetStringMacro(FileName);
  vtkGetStringMacro(FileName);


  // Description:
  // Test whether the file with the given name can be read
  // by this reader.
  virtual int CanReadFile(const char* name);

  // Description:
  // Set the byte order of the file. This function sets the
  // expected byte order of the input file. Files written on
  // PC platforms write little endian where most Unix workstations
  // write big endian. 
  void SetByteOrderToBigEndian();
  void SetByteOrderToLittleEndian();
  vtkSetMacro(ByteOrder, int);
  vtkGetMacro(ByteOrder, int);
  const char *GetByteOrderAsString();

//BTX
  enum
  {
    FILE_BIG_ENDIAN=0,
    FILE_LITTLE_ENDIAN=1
  };
//ETX

protected:
  vtkVOLBReader();
  ~vtkVOLBReader();

  void ExecuteInformation();
  void Execute();

  char* FileName;
  unsigned char *data; // a pointer to an array managed by constructor
  int ByteOrder;

private:
  vtkVOLBReader(const vtkVOLBReader&); // not implemented.
  void operator=(const vtkVOLBReader&); // not implemented.
};
#endif
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