transformation_base.hh

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//------------------------------------------------------------------------------
// This file is part of the OpenStructure project <www.openstructure.org>
//
// Copyright (C) 2008-2011 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
//------------------------------------------------------------------------------

/*
  transformation interface

  Author: Ansgar Philippsen
*/

#ifndef _IMG_TRANSFORMATION_H
#define _IMG_TRANSFORMATION_H

#include <cmath>

#include <ost/img/vecmat.hh>
#include <ost/img/extent.hh>
#include <ost/img/point.hh>

#include <ost/img/alg/module_config.hh>
namespace ost { namespace img { namespace alg {


class DLLEXPORT_IMG_ALG Transformation {
public:
  enum SizeRule {ORIGINAL, FIT};

  Transformation();
  Transformation(const Mat4& tmat);
  Transformation(const Mat4& tmat,const Mat4& imat);

  Mat4& Matrix() {return tmat_;}
  const Mat4& Matrix() const {return tmat_;}

  Mat4& InverseMatrix() {return imat_;}
  const Mat4& InverseMatrix() const {return imat_;}

  Point Apply(const Point& p);
  Extent Apply(const Extent& e);


protected:
  Mat4 tmat_;
  Mat4 imat_;
};

}}} // ns

#endif