transform.h

//
// transform.h
//
// Copyright (C) 1996 Limit Point Systems, Inc.
//
// Author: Curtis Janssen <cljanss@limitpt.com>
// Maintainer: LPS
//
// This file is part of the SC Toolkit.
//
// The SC Toolkit 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, or (at your option)
// any later version.
//
// The SC 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 Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public License
// along with the SC Toolkit; see the file COPYING.LIB.  If not, write to
// the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
//
// The U.S. Government is granted a limited license as per AL 91-7.
//
 
#ifndef _math_optimize_transform_h
#define _math_optimize_transform_h
 
#include <math/scmat/matrix.h>
 
namespace sc {
 
class NonlinearTransform: public RefCount {
  protected:
    // The linear part of the nonlinear transform.  This must
    // be initialized by derived classes in their
    // transform_coordinates routine (or the transform
    // members must be overridden so it is ignored).
    RefSCMatrix linear_transform_;
  public:
    ~NonlinearTransform();
 
    virtual void transform_coordinates(const RefSCVector& x) = 0;
    virtual void transform_gradient(const RefSCVector& g);
    virtual void transform_hessian(const RefSymmSCMatrix& h);
    virtual void transform_ihessian(const RefSymmSCMatrix &ih);
};
 
 
 
class IdentityTransform: public NonlinearTransform {
  public:
    ~IdentityTransform();
 
    void transform_coordinates(const RefSCVector& x);
    void transform_gradient(const RefSCVector& g);
    void transform_hessian(const RefSymmSCMatrix& h);
    void transform_ihessian(const RefSymmSCMatrix &ih);
};
 
}
 
#endif
 
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