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//----------------------------------------------------------------------------
// Anti-Grain Geometry - Version 2.3
// 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
//----------------------------------------------------------------------------
//
// conv_marker
//
//----------------------------------------------------------------------------
#ifndef AGG_CONV_MARKER_INCLUDED
#define AGG_CONV_MARKER_INCLUDED
#include "agg_basics.h"
#include "agg_trans_affine.h"
#include "agg_vertex_iterator.h"
namespace agg
{
//-------------------------------------------------------------conv_marker
template<class MarkerLocator, class MarkerShapes>
class conv_marker
{
public:
conv_marker(MarkerLocator& ml, MarkerShapes& ms);
trans_affine& transform() { return m_transform; }
const trans_affine& transform() const { return m_transform; }
void rewind(unsigned id);
unsigned vertex(double* x, double* y);
typedef conv_marker<MarkerLocator, MarkerShapes> source_type;
typedef vertex_iterator<source_type> iterator;
iterator begin(unsigned id) { return iterator(*this, id); }
iterator end() { return iterator(path_cmd_stop); }
private:
conv_marker(const conv_marker<MarkerLocator, MarkerShapes>&);
const conv_marker<MarkerLocator, MarkerShapes>&
operator = (const conv_marker<MarkerLocator, MarkerShapes>&);
enum status_e
{
initial,
markers,
polygon,
stop
};
MarkerLocator* m_marker_locator;
MarkerShapes* m_marker_shapes;
trans_affine m_transform;
trans_affine m_mtx;
status_e m_status;
unsigned m_marker;
unsigned m_num_markers;
};
//------------------------------------------------------------------------
template<class MarkerLocator, class MarkerShapes>
conv_marker<MarkerLocator, MarkerShapes>::conv_marker(MarkerLocator& ml, MarkerShapes& ms) :
m_marker_locator(&ml),
m_marker_shapes(&ms),
m_status(initial),
m_marker(0),
m_num_markers(1)
{
}
//------------------------------------------------------------------------
template<class MarkerLocator, class MarkerShapes>
void conv_marker<MarkerLocator, MarkerShapes>::rewind(unsigned)
{
m_status = initial;
m_marker = 0;
m_num_markers = 1;
}
//------------------------------------------------------------------------
template<class MarkerLocator, class MarkerShapes>
unsigned conv_marker<MarkerLocator, MarkerShapes>::vertex(double* x, double* y)
{
unsigned cmd = path_cmd_move_to;
double x1, y1, x2, y2;
while(!is_stop(cmd))
{
switch(m_status)
{
case initial:
if(m_num_markers == 0)
{
cmd = path_cmd_stop;
break;
}
m_marker_locator->rewind(m_marker);
++m_marker;
m_num_markers = 0;
m_status = markers;
case markers:
if(is_stop(m_marker_locator->vertex(&x1, &y1)))
{
m_status = initial;
break;
}
if(is_stop(m_marker_locator->vertex(&x2, &y2)))
{
m_status = initial;
break;
}
++m_num_markers;
m_mtx = m_transform;
m_mtx *= trans_affine_rotation(atan2(y2 - y1, x2 - x1));
m_mtx *= trans_affine_translation(x1, y1);
m_marker_shapes->rewind(m_marker - 1);
m_status = polygon;
case polygon:
cmd = m_marker_shapes->vertex(x, y);
if(is_stop(cmd))
{
cmd = path_cmd_move_to;
m_status = markers;
break;
}
m_mtx.transform(x, y);
return cmd;
case stop:
cmd = path_cmd_stop;
break;
}
}
return cmd;
}
}
#endif
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