68 lines
1.9 KiB
C++
68 lines
1.9 KiB
C++
|
//----------------------------------------------------------------------------
|
||
|
|
// Anti-Grain Geometry - Version 2.4
|
||
|
|
// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
|
||
|
|
//
|
||
|
|
// Permission to copy, use, modify, sell and distribute this software
|
||
|
|
// is granted provided this copyright notice appears in all copies.
|
||
|
|
// This software is provided "as is" without express or implied
|
||
|
|
// warranty, and with no claim as to its suitability for any purpose.
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
// Contact: mcseem@antigrain.com
|
||
|
|
// mcseemagg@yahoo.com
|
||
|
|
// http://www.antigrain.com
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
#include <math.h>
|
||
|
|
#include "agg_vpgen_segmentator.h"
|
||
|
|
|
||
|
|
namespace agg
|
||
|
|
{
|
||
|
|
|
||
|
|
void vpgen_segmentator::move_to(double x, double y)
|
||
|
|
{
|
||
|
|
m_x1 = x;
|
||
|
|
m_y1 = y;
|
||
|
|
m_dx = 0.0;
|
||
|
|
m_dy = 0.0;
|
||
|
|
m_dl = 2.0;
|
||
|
|
m_ddl = 2.0;
|
||
|
|
m_cmd = path_cmd_move_to;
|
||
|
|
}
|
||
|
|
|
||
|
|
void vpgen_segmentator::line_to(double x, double y)
|
||
|
|
{
|
||
|
|
m_x1 += m_dx;
|
||
|
|
m_y1 += m_dy;
|
||
|
|
m_dx = x - m_x1;
|
||
|
|
m_dy = y - m_y1;
|
||
|
|
double len = sqrt(m_dx * m_dx + m_dy * m_dy) * m_approximation_scale;
|
||
|
|
if(len < 1e-30) len = 1e-30;
|
||
|
|
m_ddl = 1.0 / len;
|
||
|
|
m_dl = (m_cmd == path_cmd_move_to) ? 0.0 : m_ddl;
|
||
|
|
if(m_cmd == path_cmd_stop) m_cmd = path_cmd_line_to;
|
||
|
|
}
|
||
|
|
|
||
|
|
unsigned vpgen_segmentator::vertex(double* x, double* y)
|
||
|
|
{
|
||
|
|
if(m_cmd == path_cmd_stop) return path_cmd_stop;
|
||
|
|
|
||
|
|
unsigned cmd = m_cmd;
|
||
|
|
m_cmd = path_cmd_line_to;
|
||
|
|
if(m_dl >= 1.0 - m_ddl)
|
||
|
|
{
|
||
|
|
m_dl = 1.0;
|
||
|
|
m_cmd = path_cmd_stop;
|
||
|
|
*x = m_x1 + m_dx;
|
||
|
|
*y = m_y1 + m_dy;
|
||
|
|
return cmd;
|
||
|
|
}
|
||
|
|
*x = m_x1 + m_dx * m_dl;
|
||
|
|
*y = m_y1 + m_dy * m_dl;
|
||
|
|
m_dl += m_ddl;
|
||
|
|
return cmd;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|