image_state_frequency_domain.hh

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//------------------------------------------------------------------------------
// This file is part of the OpenStructure project <www.openstructure.org>
//
// Copyright (C) 2008-2020 by the OpenStructure authors
// Copyright (C) 2003-2010 by the IPLT authors
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License as published by the Free
// Software Foundation; either version 3.0 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 Lesser General Public License for more
// details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this library; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//------------------------------------------------------------------------------

/*
  Author: Ansgar Philippsen
*/

#ifndef IMAGE_STATE_FREQUENCY_DOMAIN_HH
#define IMAGE_STATE_FREQUENCY_DOMAIN_HH

#include <ost/base.hh>
#include <ost/img/point.hh>
#include <ost/img/size.hh>
#include <ost/img/extent.hh>
#include <ost/img/pixel_sampling.hh>

#include "value_holder.hh"
#include "index.hh"

namespace ost { namespace img { namespace image_state {

/*
  frequency domain implementation
*/

class DLLEXPORT_OST_IMG_BASE FrequencyDomain {
public:
  FrequencyDomain(const Extent& e):
    extent_(Extent(e.GetSize(),Point(0,0,0))),
    spat_ori_(extent_.GetStart())
  {}

  // interface for ImageStateImpl
  DataDomain GetDomain() const {return FREQUENCY;}

  void SetSpatialOrigin(const Point& o) {spat_ori_=o;}

  Point GetSpatialOrigin() const {return spat_ori_;}

  Extent GetExtent() const {return extent_;}

  Extent GetLogicalExtent() const {return extent_;}

  Extent GetPhysicalExtent() const {return extent_;}

  template <typename V>
  Real GetReal(const Point &p, const ValueHolder<V>& data) const {
    if(extent_.Contains(p)) {
      return Val2Val<V,Real>(data.Value(Point2Index(p)));
    } else {
      return 0.0;
    }
  }

  template <typename V>
  void SetReal(const Point &p, const Real& r, ValueHolder<V>& data) {
    if(extent_.Contains(p)) {
      data.Value(Point2Index(p))=Val2Val<Real,V>(r);
    }
  }

  template <typename V>
  Complex GetComplex(const Point &p, const ValueHolder<V>& data) const {
    if(extent_.Contains(p)) {
      return Val2Val<V,Complex>(data.Value(Point2Index(p)));
    } else {
      return Complex(0.0,0.0);
    }
  }

  template <typename V>
  void SetComplex(const Point &p, const Complex& c, ValueHolder<V>& data) {
    if(extent_.Contains(p)) {
      data.Value(Point2Index(p))=Val2Val<Complex,V>(c);
    }
  }

  Index Point2Index(const Point& p) const {
    const Size& size=extent_.GetSize();
    return Index(p[0]<0 ?  size[0]+p[0] : p[0],
     p[1]<0 ?  size[1]+p[1] : p[1],
     p[2]<0 ?  size[2]+p[2] : p[2]);
  }

private:
  Extent extent_;
  Point spat_ori_;

};

}}} // ns

#endif