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65 lines
1.9 KiB
65 lines
1.9 KiB
//---------------------------------------------------------------------------- |
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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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