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//----------------------------------------------------------------------------
// Anti-Grain Geometry (AGG) - Version 2.5
// A high quality rendering engine for C++
// Copyright (C) 2002-2006 Maxim Shemanarev
// Contact: mcseem@antigrain.com
// mcseemagg@yahoo.com
// http://antigrain.com
//
// AGG is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// AGG is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with AGG; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
// MA 02110-1301, USA.
//----------------------------------------------------------------------------
#ifndef AGG_PATH_LENGTH_INCLUDED
#define AGG_PATH_LENGTH_INCLUDED
#include "agg_math.h"
namespace agg
{
template<class VertexSource>
double path_length(VertexSource& vs, unsigned path_id = 0)
{
double len = 0.0;
double start_x = 0.0;
double start_y = 0.0;
double x1 = 0.0;
double y1 = 0.0;
double x2 = 0.0;
double y2 = 0.0;
bool first = true;
unsigned cmd;
vs.rewind(path_id);
while(!is_stop(cmd = vs.vertex(&x2, &y2)))
{
if(is_vertex(cmd))
{
if(first || is_move_to(cmd))
{
start_x = x2;
start_y = y2;
}
else
{
len += calc_distance(x1, y1, x2, y2);
}
x1 = x2;
y1 = y2;
first = false;
}
else
{
if(is_close(cmd) && !first)
{
len += calc_distance(x1, y1, start_x, start_y);
}
}
}
return len;
}
}
#endif
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