104 lines
3.2 KiB
C++
104 lines
3.2 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
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Terminal markers generator (arrowhead/arrowtail)
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
#include "agg_vcgen_markers_term.h"
|
||
|
|
|
||
|
|
namespace agg
|
||
|
|
{
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------
|
||
|
|
void vcgen_markers_term::remove_all()
|
||
|
|
{
|
||
|
|
m_markers.remove_all();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------
|
||
|
|
void vcgen_markers_term::add_vertex(double x, double y, unsigned cmd)
|
||
|
|
{
|
||
|
|
if(is_move_to(cmd))
|
||
|
|
{
|
||
|
|
if(m_markers.size() & 1)
|
||
|
|
{
|
||
|
|
// Initial state, the first coordinate was added.
|
||
|
|
// If two of more calls of start_vertex() occures
|
||
|
|
// we just modify the last one.
|
||
|
|
m_markers.modify_last(coord_type(x, y));
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
m_markers.add(coord_type(x, y));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if(is_vertex(cmd))
|
||
|
|
{
|
||
|
|
if(m_markers.size() & 1)
|
||
|
|
{
|
||
|
|
// Initial state, the first coordinate was added.
|
||
|
|
// Add three more points, 0,1,1,0
|
||
|
|
m_markers.add(coord_type(x, y));
|
||
|
|
m_markers.add(m_markers[m_markers.size() - 1]);
|
||
|
|
m_markers.add(m_markers[m_markers.size() - 3]);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if(m_markers.size())
|
||
|
|
{
|
||
|
|
// Replace two last points: 0,1,1,0 -> 0,1,2,1
|
||
|
|
m_markers[m_markers.size() - 1] = m_markers[m_markers.size() - 2];
|
||
|
|
m_markers[m_markers.size() - 2] = coord_type(x, y);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------
|
||
|
|
void vcgen_markers_term::rewind(unsigned path_id)
|
||
|
|
{
|
||
|
|
m_curr_id = path_id * 2;
|
||
|
|
m_curr_idx = m_curr_id;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------
|
||
|
|
unsigned vcgen_markers_term::vertex(double* x, double* y)
|
||
|
|
{
|
||
|
|
if(m_curr_id > 2 || m_curr_idx >= m_markers.size())
|
||
|
|
{
|
||
|
|
return path_cmd_stop;
|
||
|
|
}
|
||
|
|
const coord_type& c = m_markers[m_curr_idx];
|
||
|
|
*x = c.x;
|
||
|
|
*y = c.y;
|
||
|
|
if(m_curr_idx & 1)
|
||
|
|
{
|
||
|
|
m_curr_idx += 3;
|
||
|
|
return path_cmd_line_to;
|
||
|
|
}
|
||
|
|
++m_curr_idx;
|
||
|
|
return path_cmd_move_to;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
}
|