mydxfspline.hpp

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/* Copyright (c) 2011,2014 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
 * copies to the public, perform publicly and display publicly, and to
 * permit others to do so.
 */
 
 
#ifndef MY_DXF_SPLINE_HPP
#define MY_DXF_SPLINE_HPP 1
 
 
#include "mydxfentities.hpp"
 
 
/* Spline flags */
#define SPLINE_CLOSED_MASK    1
#define SPLINE_PERIODIC_MASK  2
#define SPLINE_RATIONAL_MASK  4
#define SPLINE_PLANAR_MASK    8
#define SPLINE_LINEAR_MASK   16
 
 
class MyDXFSpline : public MyDXFPathEntity
{
 
    uint16_t             _degree;     
    double               _knot_tol;   
    double               _cont_tol;   
    double               _fit_tol;    
    Vec3D                _normal;     
    Vec3D                _tangent0;   
    Vec3D                _tangent1;   
    std::vector<double>  _knot;       
    std::vector<Vec3D>   _cont;       
    std::vector<Vec3D>   _fit;        
    int16_t              _flags;      
    std::vector<Vec3D>   _polyline;   
    void make_cyclic( void );
    void add_to_start( const Vec3D &x );
    void add_to_end( const Vec3D &x );
    void check_knots( void ) const;
    Vec3D point( double t ) const;
    Vec3D deboor( double t, int i, int k ) const;
    void build_polyline( void );
 
    void plot_polyline_points( cairo_t *cairo, const Transformation *t ) const;
    void plot_knot_points( cairo_t *cairo, const Transformation *t ) const;
    void plot_control_points( cairo_t *cairo, const Transformation *t ) const;
 
public:
 
    MyDXFSpline( class MyDXFFile *dxf );
 
    virtual ~MyDXFSpline() {}
 
    virtual MyDXFSpline *copy( void ) const { return( new MyDXFSpline( *this ) ); }
 
    virtual void explode( class MyDXFEntities *ent, MyDXFFile *dxf, const Transformation *t ) const;
 
    virtual void write( class MyDXFFile *dxf, std::ofstream &ostr );
 
    virtual EntityType get_type( void ) const { return( ENTITY_SPLINE ); }
 
    virtual Vec3D start( void ) const;
 
    virtual Vec3D end( void ) const;
 
    virtual void set_start( const Vec3D &s );
 
    virtual void set_end( const Vec3D &e );
 
    virtual int ray_cross( double x, double y ) const;
 
    bool geom_same( const MyDXFSpline &spline, double eps = 1.0e-6 ) const;
 
    bool closed( void ) const { return( _flags & SPLINE_CLOSED_MASK ); }
 
    bool periodic( void ) const { return( _flags & SPLINE_PERIODIC_MASK ); }
 
    bool rational( void ) const { return( _flags & SPLINE_RATIONAL_MASK ); }
 
    virtual void plot( const class MyDXFFile *dxf, cairo_t *cairo,
                       const Transformation *t, const double range[4] ) const;
 
    virtual void get_bbox( Vec3D &min, Vec3D &max, 
                           const class MyDXFFile *dxf, const Transformation *t ) const;
 
    virtual void scale( class MyDXFFile *dxf, double s );
 
    virtual void translate( class MyDXFFile *dxf, const Vec3D &dx );
 
    virtual void rotate_z( class MyDXFFile *dxf, double a );
 
    virtual void debug_print( std::ostream &os ) const;
};
 
 
#endif