palette.hpp

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/* Copyright (c) 2005-2013 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
 * reproduce, prepare derivative works, and perform publicly and
 * display publicly.  Beginning five (5) years after the date
 * permission to assert copyright is obtained from the U.S. Department
 * of Energy, and subject to any subsequent five (5) year renewals,
 * the U.S. Government is granted for itself and others acting on its
 * behalf a paid-up, nonexclusive, irrevocable, worldwide license in
 * the Software to reproduce, prepare derivative works, distribute
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 * permit others to do so.
 */
 
#ifndef PALETTE_HPP
#define PALETTE_HPP 1
 
 
#include <vector>
#include "vec3d.hpp"
 
 
class Palette {    
 
public:
 
   struct Entry {
        Vec3D  _color; 
        double _val;   
        Entry( const Vec3D &color, double val );
 
        bool operator<( const Entry &e ) const;
    };
 
private:
 
    std::vector<Entry> _entries;    
    int                _steps;      
public:
 
    Palette();
 
    Palette( const std::vector<Entry> &entries );
 
    Vec3D operator()( double x ) const;
 
    void clear( void );
 
    void push_back( const Vec3D &color, double val );
 
    void normalize( void );
 
    int get_steps( void ) const;
 
    void set_steps( int steps );
 
    void debug_print( std::ostream &os ) const;
};
 
 
#endif