coordmapper.hpp

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/* Copyright (c) 2005-2010 Taneli Kalvas. All rights reserved.
 *
 * You can redistribute this software and/or modify it under the terms
 * of the GNU 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
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this library (file "COPYING" included in the package);
 * if not, write to the Free Software Foundation, Inc., 51 Franklin
 * Street, Fifth Floor, Boston, MA 02110-1301 USA
 * 
 * If you have questions about your rights to use or distribute this
 * software, please contact Berkeley Lab's Technology Transfer
 * Department at TTD@lbl.gov. Other questions, comments and bug
 * reports should be sent directly to the author via email at
 * taneli.kalvas@jyu.fi.
 * 
 * NOTICE. This software was developed under partial funding from the
 * U.S.  Department of Energy.  As such, the U.S. Government has been
 * granted for itself and others acting on its behalf a paid-up,
 * nonexclusive, irrevocable, worldwide license in the Software to
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 * permission to assert copyright is obtained from the U.S. Department
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 */
 
#ifndef COORDMAPPER_HPP
#define COORDMAPPER_HPP 1
 
 
#include <iostream>
 
 
class Coordmapper1D {
    double _xx, _x0;   
public:
 
    Coordmapper1D()
        : _xx(1.0), _x0(0.0) {}
 
    Coordmapper1D( double xx, double x0 )
        : _xx(xx), _x0(x0) {}
 
    void set_transformation( double xx, double x0 ) {
        _xx = xx;
        _x0 = x0;
    }
 
    void transform( double &xout, const double &xin ) const {
        xout = _xx * xin + _x0;
    }
 
    void transform( double &x ) const {
        x = _xx * x + _x0;
    }
 
    void inv_transform( double &xout, const double &xin ) const {
        xout = (xin-_x0) / _xx;
    }
 
    void inv_transform( double &x ) const {
        x = (x-_x0) / _xx;
    }
 
    void debug_print( std::ostream &os ) const {
        os << "**Coordmapper1D\n";
        os << "_xx = " << _xx << "\n";
        os << "_x0 = " << _x0 << "\n";
    }
};
 
 
 
class Coordmapper {
    Coordmapper1D _cmx;  
    Coordmapper1D _cmy;  
public:
 
    Coordmapper() {}
 
    Coordmapper( Coordmapper1D cmx, Coordmapper1D cmy )
        : _cmx(cmx), _cmy(cmy) {}
 
    Coordmapper( double xx, double x0, double yy, double y0 )
        : _cmx(xx,x0), _cmy(yy,y0) {}
 
    void set_transformation( double xx, double x0, double yy, double y0 ) {
        _cmx.set_transformation( xx, x0 );
        _cmy.set_transformation( yy, y0 );
    }
 
    void transform( double &x, double &y ) const {
        _cmx.transform( x );
        _cmy.transform( y );
    }
 
    void transform( double *xout, const double *xin ) const {
        _cmx.transform( xout[0], xin[0] );
        _cmy.transform( xout[1], xin[1] );
    }
 
    void inv_transform( double &x, double &y ) const {
        _cmx.inv_transform( x );
        _cmy.inv_transform( y );
    }
 
    void inv_transform( double *xout, const double *xin ) const {
        _cmx.inv_transform( xout[0], xin[0] );
        _cmy.inv_transform( xout[1], xin[1] );
    }
 
 
    void debug_print( std::ostream &os ) const {
        os << "**Coordmapper x:\n";
        _cmx.debug_print( os );
        os << "**Coordmapper y:\n";
        _cmy.debug_print( os );
    }
};
 
 
#endif