VolumeViz/readers/SoVRVoxFileReader.h

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/*=======================================================================
** Author      : M. Heck (Jul 2003)
**=======================================================================*/
#ifndef  _SO_VR_VOX_FILE_READER_
#define  _SO_VR_VOX_FILE_READER_

#include <LDM/readers/SoVolumeReader.h>
#include <VolumeViz/nodes/SoVolumeData.h>


class  SoVRVoxFileReader : public SoVolumeReader 
{
  SO_FIELDCONTAINER_HEADER(SoVRVoxFileReader);

 public:
  SoVRVoxFileReader();

  virtual int setFilename( const SbString& filename );

  virtual ReadError getDataChar( SbBox3f &size, SoDataSet::DataType &type,  SbVec3i32 &dim );

  virtual void getSubSlice( const SbBox2i32& subSlice, int sliceNumber, void * data );

  virtual int getNumSignificantBits() 
  { return m_numSigBits; }

  virtual SoVolumeReader::ReaderType getReaderType ()
  {return VOX;};

 private:

  void convertFromTo(void* inBuffer, void* outBuffer, size_t numElements, SoDataSet::DataType inDataType, SoDataSet::DataType outDataType, char inEndianness);

  template<typename FROM_TYPE>
  void convertFromTo(FROM_TYPE* inBuffer, void* outBuffer, size_t numElements, SoDataSet::DataType outDataType, char inEndianness);

  template<typename FROM_TYPE, typename TO_TYPE>
  void convertFromTo(FROM_TYPE* inBuffer, TO_TYPE* outBuffer, size_t numElements, char inEndianness);

  SbBox3f   m_size;
  SbVec3i32 m_dim;

  // File may store data as int8 but this volume may be seen as int16.
  // For. when file is uint8 but offset is -2000, actual data may be in [-2000, 0] so have
  // to be encode in signed 16 bits.
  SoDataSet::DataType m_fileDataType;
  SoDataSet::DataType m_volumeDataType;

  int m_offsetToData;

  // Specific data from vox file
  SbString  m_volumeTitle;
  SbString  m_volumeCopyright;
  int       m_volumeCount;
  SbVec3f   m_volumeScale;
  SbVec3f   m_volumePosition;
  char      m_endian;
  SbMatrix  m_volumeMatrix;

  // Scale and offset to rescale data:
  // outData = scale * inData + offset.
  double m_voxelScale;
  double m_voxelOffset;

  int       m_numSigBits;

  SbString m_userFilename;

  // If true, apply scale and offset to data in the getSubSlice. Linked to LDM_VOX_READER_APPLY_SCALE_OFFSET.
  static bool s_applyScaleOffset;
};

#endif // _SO_VR_VOX_FILE_READER_

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Open Inventor Toolkit reference manual, generated on 15 Mar 2023
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