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#ifndef AGG_PATH_LENGTH_INCLUDED
16#define AGG_PATH_LENGTH_INCLUDED
17
18#include "agg_math.h"
19
20namespace agg
21{
22    template<class VertexSource>
23    double path_length(VertexSource& vs, unsigned path_id = 0)
24    {
25        double len = 0.0;
26        double start_x = 0.0;
27        double start_y = 0.0;
28        double x1 = 0.0;
29        double y1 = 0.0;
30        double x2 = 0.0;
31        double y2 = 0.0;
32        bool first = true;
33
34        unsigned cmd;
35        vs.rewind(path_id);
36        while(!is_stop(cmd = vs.vertex(&x2, &y2)))
37        {
38            if(is_vertex(cmd))
39            {
40                if(first || is_move_to(cmd))
41                {
42                    start_x = x2;
43                    start_y = y2;
44                }
45                else
46                {
47                    len += calc_distance(x1, y1, x2, y2);
48                }
49                x1 = x2;
50                y1 = y2;
51                first = false;
52            }
53            else
54            {
55                if(is_close(cmd) && !first)
56                {
57                    len += calc_distance(x1, y1, start_x, start_y);
58                }
59            }
60        }
61        return len;
62    }
63}
64
65#endif
66