blinepoint.h

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/* === S Y N F I G ========================================================= */
/* ========================================================================= */

/* === S T A R T =========================================================== */

#ifndef __SYNFIG_BLINEPOINT_H
#define __SYNFIG_BLINEPOINT_H

/* === H E A D E R S ======================================================= */

#include "vector.h"
#include "uniqueid.h"
#include <algorithm>

/* === M A C R O S ========================================================= */

/* === T Y P E D E F S ===================================================== */

/* === C L A S S E S & S T R U C T S ======================================= */

namespace synfig {

class BLinePoint : public UniqueID
{
private:
    Point   vertex_;
    Vector  tangent_[2];
    float   width_;
    float   origin_;
    bool    split_tangent_radius_;
    bool    split_tangent_angle_;
    bool    boned_vertex_;
    Point   vertex_setup_;

    // True if split_tangent_radius == split_tangent_angle == true otherwise false
    bool    split_tangent_both_;
    // True if split_tangent_radius == split_tangent_angle == false otherwise false
    bool    merge_tangent_both_;

    // Used to store the tangent2 when split_radius=true && split_angle==false
    Vector  tangent2_radius_split_;
    // Used to store the tangent2 when split_radius=false && split_angle==true
    Vector  tangent2_angle_split_;

    void    update_flags();
    void    update_tangent2();

public:

    BLinePoint():
        vertex_(Point(0,0)),
        width_(1),
        origin_(0.0),
        split_tangent_radius_(true),
        split_tangent_angle_(false),
        boned_vertex_(false),
        vertex_setup_(vertex_)
    {
        tangent_[0] = Point(0,0);
        tangent_[1] = Point(0,0);
        update_flags();
    }

    const Point& get_vertex()const { return vertex_; }
    void set_vertex(const Point& x) { vertex_=x; vertex_setup_=vertex_;}

    const Vector& get_tangent1()const { return tangent_[0]; }
    const Vector& get_tangent2()const
    {
        if(merge_tangent_both_)
            return tangent_[0];
        if(split_tangent_both_)
            return tangent_[1];
        if(split_tangent_radius_)
            return tangent2_radius_split_;
        return tangent2_angle_split_;
    }
    void set_tangent(const Vector& x) { tangent_[0]=tangent_[1]=x; update_tangent2(); }
    void set_tangent1(const Vector& x) { tangent_[0]=x; update_tangent2(); }
    void set_tangent2(const Vector& x) { tangent_[1]=x; update_tangent2(); }

    const float& get_width()const { return width_; }
    void set_width(float x) { width_=x; }

    // We store the origin offset by 0.5 so that
    // can have the origin set to the default by zeroing
    // out the structure.
    float get_origin()const { return origin_+0.5f; }
    void set_origin(float x) { origin_=x-0.5f; }


    const bool& get_split_tangent_both()const { return split_tangent_both_; }
    void set_split_tangent_both(bool x=true) { set_split_tangent_radius(x); set_split_tangent_angle(x); }

    const bool& get_merge_tangent_both()const { return merge_tangent_both_; }
    void set_merge_tangent_both(bool x=true) { set_split_tangent_radius(!x); set_split_tangent_angle(!x); }


    const bool& get_split_tangent_radius()const { return split_tangent_radius_; }
    void set_split_tangent_radius(bool x=true)
    {
        split_tangent_radius_=x;
        update_tangent2();
        update_flags();
    }

    const bool& get_split_tangent_angle()const { return split_tangent_angle_; }
    void set_split_tangent_angle(bool x=true)
    {
        split_tangent_angle_=x;
        update_tangent2();
        update_flags();
    }
    const bool& get_boned_vertex_flag()const { return boned_vertex_; }
    void set_boned_vertex_flag(bool x=true) { boned_vertex_=x; }

    const Vector& get_vertex_setup()const { return vertex_setup_; }
    void set_vertex_setup(Vector& x) { vertex_setup_=x; }

    void reverse();

}; // END of class BLinePoint

}; // END of namespace synfig

/* === E N D =============================================================== */

#endif