66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
//----------------------------------------------------------------------------
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// Anti-Grain Geometry - Version 2.4
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// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
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//
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// Permission to copy, use, modify, sell and distribute this software
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// is granted provided this copyright notice appears in all copies.
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// This software is provided "as is" without express or implied
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// warranty, and with no claim as to its suitability for any purpose.
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//
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//----------------------------------------------------------------------------
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// Contact: mcseem@antigrain.com
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// mcseemagg@yahoo.com
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// http://www.antigrain.com
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//----------------------------------------------------------------------------
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#ifndef AGG_PATH_LENGTH_INCLUDED
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#define AGG_PATH_LENGTH_INCLUDED
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#include "agg_math.h"
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namespace agg
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{
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template<class VertexSource>
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double path_length(VertexSource& vs, unsigned path_id = 0)
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{
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double len = 0.0;
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double start_x = 0.0;
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double start_y = 0.0;
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double x1 = 0.0;
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double y1 = 0.0;
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double x2 = 0.0;
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double y2 = 0.0;
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bool first = true;
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unsigned cmd;
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vs.rewind(path_id);
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while(!is_stop(cmd = vs.vertex(&x2, &y2)))
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{
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if(is_vertex(cmd))
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{
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if(first || is_move_to(cmd))
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{
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start_x = x2;
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start_y = y2;
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}
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else
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{
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len += calc_distance(x1, y1, x2, y2);
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}
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x1 = x2;
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y1 = y2;
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first = false;
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}
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else
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{
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if(is_close(cmd) && !first)
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{
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len += calc_distance(x1, y1, start_x, start_y);
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}
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}
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}
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return len;
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}
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}
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#endif
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