vlvoxelop_centraldiff.h

Go to the documentation of this file.

// $Id: vlvoxelop_centraldiff.h,v 1.3 2003/06/13 07:14:13 sarang Exp $
//
// OpenVL - A Library for working with volumetric datasets.
//          http://openvl.sf.net
//
// Copyright (C) 2000-2003  Sarang Lakare <sarang#users.sf.net>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems to openvl-devel@lists.sf.net or
// at the OpenVL website.
//

#ifndef _vlVoxelOpCentralDiff_h
#define _vlVoxelOpCentralDiff_h

#include "vlvoxeloperator.h"
#include "vlvarlistadmin.h"

template <typename DataType, vlLayoutType Layout>
class vlVoxelOpCentralDiff : public vlVoxelOperator<DataType, Layout>
{
public:
  vlVoxelOpType type() { return vlVoxelOp::CentralDiff; };

  std::string name() { return ("CentralDiff"); };

  vlLayoutType layout() { return Layout; };

  vlVarList * config() { return (&m_varList); };
  
  bool getValue(vlVolIterConst<DataType, Layout> & iter, DataType & value)
  { return (false); };

  bool getValue(vlVolIterConst<DataType, Layout> & iter, vlVoxelOpValue & value)
  {
    double dx = (double)(iter.getRelativeX(1)-iter.getRelativeX(-1));
    double dy = (double)(iter.getRelativeY(1)-iter.getRelativeY(-1));
    double dz = (double)(iter.getRelativeZ(1)-iter.getRelativeZ(-1));

    value.setNormal3f(vlNormal3f(dx, dy, dz));

    value.setDl(sqrt(dx*dx+dy*dy+dz*dz));

    return (true);
  };
  
protected:
  vlVarListAdmin m_varList;

};

#endif // _vlVoxelOpCentralDiff_h

---