mydxfentities.hpp

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/* Copyright (c) 2010-2011 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_ENTITIES_HPP
#define MY_DXF_ENTITIES_HPP 1


#include <stdint.h>
#include <vector>
#include <cairo.h>
#include "mydxffile.hpp"
#include "vec3d.hpp"
#include "transformation.hpp"


#define MYDXF_PERT_EPS 1.1e-12


enum EntityType {
    ENTITY_UNKNOWN = 0,
    ENTITY_LINE,
    ENTITY_LWPOLYLINE,
    ENTITY_SPLINE,
    ENTITY_ARC,
    ENTITY_CIRCLE,
    ENTITY_MTEXT,
    ENTITY_INSERT
};


class MyDXFEntity
{

protected: 

    std::string _handle;
    std::string _layer;

    MyDXFEntity();

    //MyDXFEntity( const MyDXFEntity &ent );

    static void bbox_ppoint( Vec3D &min, Vec3D &max, const Vec3D &p );

    void write_common( class MyDXFFile *dxf, std::ofstream &ostr );
    void process_group( class MyDXFFile *dxf );
    void constructor_debug_print( void ) const;
    void debug_print_base( std::ostream &os ) const;

public:

    virtual ~MyDXFEntity() {}

    virtual MyDXFEntity *copy( void ) const = 0;

    virtual void explode( class MyDXFEntities *ent, MyDXFFile *dxf, const Transformation *t ) const = 0;

    virtual void write( class MyDXFFile *dxf, std::ofstream &ostr ) = 0;

    virtual void scale( class MyDXFFile *dxf, double s ) = 0;

    virtual void translate( class MyDXFFile *dxf, const Vec3D &dx ) = 0;

    void set_layer( const std::string &layer ) { _layer = layer; }

    std::string get_layer( void ) const { return( _layer ); }

    virtual EntityType get_type( void ) const = 0;

    void set_handle( const std::string &handle ) { _handle = handle; }

    std::string get_handle( void ) const { return( _handle ); }

    virtual void plot( const class MyDXFFile *dxf, cairo_t *cairo, 
                       const Transformation *t, const double range[4] ) const = 0;

    virtual void get_bbox( Vec3D &min, Vec3D &max, 
                           const class MyDXFFile *dxf, const Transformation *t ) const = 0;

    virtual void debug_print( std::ostream &os ) const = 0;

    friend std::ostream &operator<<( std::ostream &os, const MyDXFEntity &ent );
};


class MyDXFPathEntity : public MyDXFEntity
{

protected: 

    MyDXFPathEntity() {}

    MyDXFPathEntity( const MyDXFEntity &ent ) : MyDXFEntity(ent) {}

public:

    virtual ~MyDXFPathEntity() {}

    virtual Vec3D start( void ) const = 0;

    virtual Vec3D end( void ) const = 0;

    virtual void set_start( const Vec3D &s ) = 0;

    virtual void set_end( const Vec3D &e ) = 0;

    virtual int ray_cross( double x, double y ) const = 0;
};




class MyDXFEntitySelection
{

    std::vector<uint32_t> _selection;

public:

    MyDXFEntitySelection() {}

    ~MyDXFEntitySelection() {}

    uint32_t size() const { return( _selection.size() ); }

    void add_entity( uint32_t a ) { _selection.push_back( a ); }

    const uint32_t &operator()( int a ) const { 
        if( a < 0 || a >= (int)_selection.size() )
            throw( Error( ERROR_LOCATION, "index out of range" ) );
        return( _selection[a] ); 
    }

    uint32_t &operator()( int a ) { 
        if( a < 0 || a >= (int)_selection.size() )
            throw( Error( ERROR_LOCATION, "index out of range" ) );
        return( _selection[a] ); 
    }

    friend std::ostream &operator<<( std::ostream &os, const MyDXFEntitySelection &sel );
};


class MyDXFEntities
{

    MyDXFFile                  *_dxf;      
    std::vector<MyDXFEntity *>  _entities; 
public:


    MyDXFEntities( class MyDXFFile *dxf );

    MyDXFEntities( class MyDXFFile *dxf, MyDXFEntities *ent, MyDXFEntitySelection *sel );

    MyDXFEntities( class MyDXFFile *dxf, bool reading_blocks );

    ~MyDXFEntities();


    void write( class MyDXFFile *dxf, std::ofstream &ostr );

    void write_entities( class MyDXFFile *dxf, std::ofstream &ostr );

    uint32_t size() const { return( _entities.size() ); }

    const MyDXFEntity *get_entity( uint32_t a ) const { return( _entities[a] ); }

    MyDXFEntity *get_entity( uint32_t a ) { return( _entities[a] ); }



    
    void add_entity( MyDXFEntity *e ) { _entities.push_back( e ); }


    MyDXFEntitySelection *selection_all( void ) const;

    MyDXFEntitySelection *selection_layer( const std::string &layername ) const;

    MyDXFEntitySelection *selection_type( EntityType type ) const;

    MyDXFEntitySelection *selection_path_loop( MyDXFEntitySelection *selection,
                                               double eps = 1.0e-6 );





    bool geom_same( uint32_t a, uint32_t b, double eps = 1.0e-6 ) const;

    /* ! \brief Check if point is inside a loop defined by a selection
     *   of entities.
     *
     *   The check is done assuming a 2D drawing in xy-plane. The
     *   check is done using ray shooting algorithm. If exact crossing
     *   happens perturbation algorithm is used. New test is performed
     *   at eps distance from the first.
     */
    bool inside_loop( MyDXFEntitySelection *selection, double x, double y, double eps = 1.0e-6 );

    void plot( const MyDXFEntitySelection *selection, const class MyDXFFile *dxf, 
               cairo_t *cairo, const Transformation *t, const double range[4] ) const;

    void get_bbox( const MyDXFEntitySelection *selection, Vec3D &min, Vec3D &max, 
                   const class MyDXFFile *dxf, const Transformation *t ) const;



    /*
    void translate( MyDXFEntitySelection *selection, double dx, double dy, double dz );
    void rotate_x( MyDXFEntitySelection *selection, double y, double z, double ang );
    void rotate_y( MyDXFEntitySelection *selection, double x, double z, double ang );
    void rotate_z( MyDXFEntitySelection *selection, double x, double y, double ang );
    */

    void scale( MyDXFEntitySelection *selection, class MyDXFFile *dxf, double s );

    void translate( MyDXFEntitySelection *selection, class MyDXFFile *dxf, const Vec3D &dx );



    void remove( MyDXFEntitySelection *selection );


    void explode( MyDXFEntitySelection *selection, class MyDXFFile *dxf );

    void explode( MyDXFEntities *ent, class MyDXFFile *dxf, const Transformation *t ) const;


    void debug_print( std::ostream &os ) const;


};





#endif