talVolume.h

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#ifndef AIMS_TALAIRACH_TALVOLUME_H
#define AIMS_TALAIRACH_TALVOLUME_H

#include <aims/data/data.h>
#include <aims/talairach/talBoxBase.h>


template< class T >
class TalairachVolume
{
public:

  TalairachVolume( int dx=157, int dy=189, int dz=136, int cx=78, int cy=76, 
                   int dz=85 );
  virtual ~Talairach() { }

  AimsData< T >& volume() { return m_d; }

  Point3df toVolume( const TalairachBoxBase&, const Point3df& );
  Point3df fromVolume( const TalairachBoxBase&, const Point3df& );

  AimsData< T >& create( const TalairachBoxBase&, const AimsData< T >& );

private:

  Point3df _scale;
  Point3df _translation;

  AimsData< T > m_d;
};


template< class T > inline
void TalairachVolume< T >::TalairachVolume( int dx, int dy, int dz, 
                                            int cx, int cy, int cz )
{
  m_d = AimsData< T >( dx, dy, dz );
  m_d.setXYZT( 1.0f, 1.0f, 1.0f );

  _translation = Point3df( (float)cx, -(float)cy, -(float)cz );

  int cdx = ( dx - cx - 1 > cx ) ? dx - cx - 1 : cx;
  _scale = Point3df( (float)cdx, (float)( dy - cy - 1 ), (float)cz );
}


template< class T > inline
Point3df TalairachVolume< T >::toVolume( const TalairachBoxBase& tb,
                                         const Point3df& pt )
{
  Point3df res = tb.toTalairach( pt );

  for ( int i=0; i<3; i++ )
    res[ i ] = res[ i ] * _scale[ i ] + _translation[ i ];

  return res;
}


template< class T > inline
Point3df TalairachVolume< T >::fromVolume( const TalairachBoxBase& tb,
                                           const Point3df& pt )
{
  Point3df res;

  for ( int i=0; i<3; i++ )
    res[ i ] = ( pt[ i ] - _translation[ i ] ) / _scale[ i ];

  return tb.fromTalairach( res );
}


template< class T > inline
AimsData< T >& TalairachVolume< T >::create( const TalairachBoxBase& tb,
                                             AimsData< T >& d )
{
  int i, j, k;
  int dx = m_d.dimX();
  int dy = m_d.dimY();
  int dz = m_d.dimZ();

  Point3df pt, npt;
  Point3df r( 0.5f, 0.5f, 0.5f );

  for ( k=0; k<dz; k++ )
    for ( j=0; j<dy; j++ )
      for ( i=0; i<dx; i++ )
        {
          pt = Point3df( (float)i, (float)j, (float)k );
          npt = fromVolume( pt ) + r;
          m_d( i, j, k ) = d( (int)npt[ 0 ], (int)npt[ 1 ], (int)npt[ 2 ] );
        }
}


#endif