[Paraview] Adding a Reader

[Andy Cedilnik]

Hi Dave,

I wrote a explanation on how to import module into ParaView:

http://www.paraview.org/Wiki/ParaView:Extend

       Andy

Dave Semeraro wrote:
>
> 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
> ------------------------------------------------------------------------
>
> /*
> 	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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