cmtkProbeInfo.h

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/*
//
//  Copyright 1997-2009 Torsten Rohlfing
//
//  Copyright 2004-2010 SRI International
//
//  This file is part of the Computational Morphometry Toolkit.
//
//  http://www.nitrc.org/projects/cmtk/
//
//  The Computational Morphometry Toolkit is free software: you can
//  redistribute it and/or modify it under the terms of the GNU General Public
//  License as published by the Free Software Foundation, either version 3 of
//  the License, or (at your option) any later version.
//
//  The Computational Morphometry Toolkit is distributed in the hope that it
//  will be useful, but WITHOUT ANY WARRANTY; without even the implied
//  warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License along
//  with the Computational Morphometry Toolkit.  If not, see
//  <http://www.gnu.org/licenses/>.
//
//  $Revision: 2752 $
//
//  $LastChangedDate: 2011-01-17 11:33:31 -0800 (Mon, 17 Jan 2011) $
//
//  $LastChangedBy: torstenrohlfing $
//
*/

#ifndef __cmtkProbeInfo_h_included_
#define __cmtkProbeInfo_h_included_

#include <cmtkconfig.h>

#include <Base/cmtkTypes.h>
#include <Base/cmtkVector3D.h>

namespace
cmtk
{


class ProbeInfo 
{
public:
  Types::DataItem Values[8];

  Types::Coordinate Deltas[3];

  Types::Coordinate Offsets[6];

  Vector3D Location;

  Types::DataItem GetValueTrilinear () const 
  {
    return static_cast<Types::DataItem>( Offsets[2]*(Offsets[1]*(Offsets[0]*Values[0]+Offsets[3]*Values[1])+ 
                                             Offsets[4]*(Offsets[0]*Values[2]+Offsets[3]*Values[3]))+
                                 Offsets[5]*(Offsets[1]*(Offsets[0]*Values[4]+Offsets[3]*Values[5])+ 
                                             Offsets[4]*(Offsets[0]*Values[6]+Offsets[3]*Values[7]) ) );
  }

  Types::DataItem GetValueTrilinearAbove ( const Types::DataItem threshold ) const 
  {
    Types::DataItem result = 0;
    for ( int idx=0; idx<8; ++idx ) 
      {
      if ( Values[idx] >= threshold )
        result += static_cast<Types::DataItem>( GetWeight( idx ) * Values[idx] );
      }
    return result;
  }

  Types::DataItem GetValueTrilinearBelow ( const Types::DataItem threshold ) const 
  {
    Types::DataItem result = 0;
    for ( int idx=0; idx<8; ++idx ) {
      if ( Values[idx] < threshold )
        result += static_cast<Types::DataItem>( GetWeight( idx ) * Values[idx] );
    }
    return result;
  }

  byte GetNumberOfValuesAbove ( const Types::DataItem threshold ) const 
  {
    byte result = 0;
    for ( int idx=0; idx<8; ++idx )
      if ( Values[idx] >= threshold )
        ++result;
    return result;
  }

  byte GetNumberOfValuesBelow ( const Types::DataItem threshold ) const 
  {
    byte result = 0;
    for ( int idx=0; idx<8; ++idx )
      if ( Values[idx] < threshold )
        ++result;
    return result;
  }

  Types::Coordinate GetWeight( const int index ) const 
  {
    switch ( index ) 
      {
      case 0: return Offsets[2] * Offsets[1] * Offsets[0];
      case 1: return Offsets[2] * Offsets[1] * Offsets[3];
      case 2: return Offsets[2] * Offsets[4] * Offsets[0];
      case 3: return Offsets[2] * Offsets[4] * Offsets[3];
      case 4: return Offsets[5] * Offsets[1] * Offsets[0];
      case 5: return Offsets[5] * Offsets[1] * Offsets[3];
      case 6: return Offsets[5] * Offsets[4] * Offsets[0];
      case 7: return Offsets[5] * Offsets[4] * Offsets[3];
      }
    return 0;
  }

  Vector3D& GetPartialDerivatives ( Vector3D& d ) const 
  {
    d[0] = static_cast<Types::Coordinate>( Deltas[0] * 
                                           ( Offsets[2]*(Offsets[1]*Values[1]+Offsets[4]*Values[3])+
                                             Offsets[5]*(Offsets[1]*Values[5]+Offsets[4]*Values[7])-
                                             Offsets[2]*(Offsets[1]*Values[0]+Offsets[4]*Values[2])-
                                             Offsets[5]*(Offsets[1]*Values[4]+Offsets[4]*Values[6])) );
    
    d[1] = static_cast<Types::Coordinate>( Deltas[1] * 
                                           ( Offsets[2]*(Offsets[0]*Values[2]+Offsets[3]*Values[3])+
                                             Offsets[5]*(Offsets[0]*Values[6]+Offsets[3]*Values[7])-
                                             Offsets[2]*(Offsets[0]*Values[0]+Offsets[3]*Values[1])-
                                             Offsets[5]*(Offsets[0]*Values[4]+Offsets[3]*Values[5])) );
    
    d[2] = static_cast<Types::Coordinate>( Deltas[2] *
                                           ( Offsets[1]*(Offsets[0]*Values[4]+Offsets[3]*Values[5])+
                                             Offsets[4]*(Offsets[0]*Values[6]+Offsets[3]*Values[7])-
                                             Offsets[1]*(Offsets[0]*Values[0]+Offsets[3]*Values[1])-
                                             Offsets[4]*(Offsets[0]*Values[2]+Offsets[3]*Values[3])) );
    return d;
  }
};


} // namespace cmtk

#endif // #ifndef __cmtkProbeInfo_h_included_