1//----------------------------------------------------------------------------
2// Anti-Grain Geometry - Version 2.4
3// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
4//
5// Permission to copy, use, modify, sell and distribute this software
6// is granted provided this copyright notice appears in all copies.
7// This software is provided "as is" without express or implied
8// warranty, and with no claim as to its suitability for any purpose.
9//
10//----------------------------------------------------------------------------
11// Contact: mcseem@antigrain.com
12//          mcseemagg@yahoo.com
13//          http://www.antigrain.com
14//----------------------------------------------------------------------------
15
16#ifndef AGG_VCGEN_BSPLINE_INCLUDED
17#define AGG_VCGEN_BSPLINE_INCLUDED
18
19#include "agg_basics.h"
20#include "agg_array.h"
21#include "agg_bspline.h"
22
23
24namespace agg
25{
26
27    //==========================================================vcgen_bspline
28    class vcgen_bspline
29    {
30        enum status_e
31        {
32            initial,
33            ready,
34            polygon,
35            end_poly,
36            stop
37        };
38
39    public:
40        typedef pod_bvector<point_d, 6> vertex_storage;
41
42        vcgen_bspline();
43
44        void interpolation_step(double v) { m_interpolation_step = v; }
45        double interpolation_step() const { return m_interpolation_step; }
46
47        // Vertex Generator Interface
48        void remove_all();
49        void add_vertex(double x, double y, unsigned cmd);
50
51        // Vertex Source Interface
52        void     rewind(unsigned path_id);
53        unsigned vertex(double* x, double* y);
54
55    private:
56        vcgen_bspline(const vcgen_bspline&);
57        const vcgen_bspline& operator = (const vcgen_bspline&);
58
59        vertex_storage m_src_vertices;
60        bspline        m_spline_x;
61        bspline        m_spline_y;
62        double         m_interpolation_step;
63        unsigned       m_closed;
64        status_e       m_status;
65        unsigned       m_src_vertex;
66        double         m_cur_abscissa;
67        double         m_max_abscissa;
68    };
69
70}
71
72
73#endif
74
75