add 'clipper' based offset converter - it created buffer around geometry so can't replace current impl
This commit is contained in:
artemp
parent
3be0074c20
commit
146bf85349
1 changed files with 236 additions and 0 deletions
236
deps/agg/include/agg_conv_offset.h
vendored
Normal file
236
deps/agg/include/agg_conv_offset.h
vendored
Normal file
|
|
@ -0,0 +1,236 @@
|
|||
/*******************************************************************************
|
||||
* *
|
||||
* Author : Angus Johnson *
|
||||
* Version : 1.1 *
|
||||
* Date : 4 April 2011 *
|
||||
* Website : http://www.angusj.com *
|
||||
* Copyright : Angus Johnson 2010-2011 *
|
||||
* *
|
||||
* License: *
|
||||
* Use, modification & distribution is subject to Boost Software License Ver 1. *
|
||||
* http://www.boost.org/LICENSE_1_0.txt *
|
||||
* *
|
||||
*******************************************************************************/
|
||||
|
||||
// based on adapted agg_conv_clipper.h
|
||||
|
||||
#ifndef AGG_CONV_OFFSET_INCLUDED
|
||||
#define AGG_CONV_OFFSET_INCLUDED
|
||||
|
||||
#include <cmath>
|
||||
#include "agg_basics.h"
|
||||
#include "agg_array.h"
|
||||
#include "clipper.hpp"
|
||||
|
||||
namespace agg
|
||||
{
|
||||
|
||||
template<class VSA> class conv_offset
|
||||
{
|
||||
enum status { status_move_to, status_line_to, status_stop };
|
||||
typedef VSA source_a_type;
|
||||
typedef conv_offset<source_a_type> self_type;
|
||||
|
||||
private:
|
||||
source_a_type* m_src_a;
|
||||
double m_offset;
|
||||
status m_status;
|
||||
int m_vertex;
|
||||
int m_contour;
|
||||
int m_scaling_factor;
|
||||
pod_bvector<ClipperLib::IntPoint, 8> m_vertex_accumulator;
|
||||
ClipperLib::Paths m_poly_a;
|
||||
ClipperLib::Paths m_result;
|
||||
ClipperLib::ClipperOffset m_clipper_offset;
|
||||
|
||||
int Round(double val)
|
||||
{
|
||||
if ((val < 0)) return (int)(val - 0.5); else return (int)(val + 0.5);
|
||||
}
|
||||
|
||||
public:
|
||||
conv_offset(source_a_type &a, double offset = 0.0,
|
||||
int scaling_factor = 0)
|
||||
: m_src_a(&a),
|
||||
m_offset(offset),
|
||||
m_status(status_move_to),
|
||||
m_vertex(-1),
|
||||
m_contour(-1)
|
||||
{
|
||||
m_scaling_factor = std::max(std::min(scaling_factor, 6),0);
|
||||
m_scaling_factor = Round(std::pow((double)10, m_scaling_factor));
|
||||
}
|
||||
|
||||
~conv_offset()
|
||||
{
|
||||
}
|
||||
|
||||
void set_offset(double offset) { m_offset = offset;}
|
||||
unsigned type() const
|
||||
{
|
||||
return static_cast<unsigned>(m_src_a->type());
|
||||
}
|
||||
|
||||
double get_offset() const
|
||||
{
|
||||
return m_offset;
|
||||
}
|
||||
|
||||
void rewind(unsigned path_id);
|
||||
unsigned vertex(double* x, double* y);
|
||||
|
||||
bool next_contour();
|
||||
bool next_vertex(double* x, double* y);
|
||||
void start_extracting();
|
||||
void add_vertex_(double &x, double &y);
|
||||
void end_contour(ClipperLib::Paths &p);
|
||||
|
||||
template<class VS> void add(VS &src, ClipperLib::Paths &p)
|
||||
{
|
||||
unsigned cmd;
|
||||
double x; double y; double start_x; double start_y;
|
||||
bool starting_first_line;
|
||||
|
||||
start_x = 0.0;
|
||||
start_y = 0.0;
|
||||
starting_first_line = true;
|
||||
p.resize(0);
|
||||
|
||||
cmd = src->vertex( &x , &y );
|
||||
while(!is_stop(cmd))
|
||||
{
|
||||
if(is_vertex(cmd))
|
||||
{
|
||||
if(is_move_to(cmd))
|
||||
{
|
||||
if(!starting_first_line ) end_contour(p);
|
||||
start_x = x;
|
||||
start_y = y;
|
||||
}
|
||||
add_vertex_( x, y );
|
||||
starting_first_line = false;
|
||||
}
|
||||
else if(is_end_poly(cmd))
|
||||
{
|
||||
if(!starting_first_line && is_closed(cmd))
|
||||
add_vertex_( start_x, start_y );
|
||||
}
|
||||
cmd = src->vertex( &x, &y );
|
||||
}
|
||||
end_contour(p);
|
||||
}
|
||||
};
|
||||
|
||||
//------------------------------------------------------------------------
|
||||
|
||||
template<class VSA>
|
||||
void conv_offset<VSA>::start_extracting()
|
||||
{
|
||||
m_status = status_move_to;
|
||||
m_contour = -1;
|
||||
m_vertex = -1;
|
||||
}
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
template<class VSA>
|
||||
void conv_offset<VSA>::rewind(unsigned path_id)
|
||||
{
|
||||
m_src_a->rewind( path_id );
|
||||
//m_src_b->rewind( path_id );
|
||||
|
||||
add( m_src_a , m_poly_a );
|
||||
//add( m_src_b , m_poly_b );
|
||||
m_result.resize(0);
|
||||
m_clipper_offset.Clear();
|
||||
m_clipper_offset.AddPaths(m_poly_a,ClipperLib::jtMiter, ClipperLib::etOpenButt);//ClosedLine);//Polygon);
|
||||
m_clipper_offset.Execute(m_result, m_offset * m_scaling_factor);
|
||||
start_extracting();
|
||||
}
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
template<class VSA>
|
||||
void conv_offset<VSA>::end_contour( ClipperLib::Paths &p)
|
||||
{
|
||||
unsigned i, len;
|
||||
|
||||
if( m_vertex_accumulator.size() < 3 ) return;
|
||||
len = p.size();
|
||||
p.resize(len+1);
|
||||
p[len].resize(m_vertex_accumulator.size());
|
||||
for( i = 0 ; i < m_vertex_accumulator.size() ; i++ )
|
||||
p[len][i] = m_vertex_accumulator[i];
|
||||
m_vertex_accumulator.remove_all();
|
||||
}
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
template<class VSA>
|
||||
void conv_offset<VSA>::add_vertex_(double &x, double &y)
|
||||
{
|
||||
ClipperLib::IntPoint v;
|
||||
|
||||
v.X = Round(x * m_scaling_factor);
|
||||
v.Y = Round(y * m_scaling_factor);
|
||||
m_vertex_accumulator.add( v );
|
||||
}
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
template<class VSA>
|
||||
bool conv_offset<VSA>::next_contour()
|
||||
{
|
||||
m_contour++;
|
||||
if(m_contour >= (int)m_result.size()) return false;
|
||||
m_vertex =-1;
|
||||
return true;
|
||||
}
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
template<class VSA>
|
||||
bool conv_offset<VSA>::next_vertex(double *x, double *y)
|
||||
{
|
||||
m_vertex++;
|
||||
if(m_vertex >= (int)m_result[m_contour].size()) return false;
|
||||
*x = (double)m_result[ m_contour ][ m_vertex ].X / m_scaling_factor;
|
||||
*y = (double)m_result[ m_contour ][ m_vertex ].Y / m_scaling_factor;
|
||||
return true;
|
||||
}
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
template<class VSA>
|
||||
unsigned conv_offset<VSA>::vertex(double *x, double *y)
|
||||
{
|
||||
if( m_status == status_move_to )
|
||||
{
|
||||
if( next_contour() )
|
||||
{
|
||||
if( next_vertex( x, y ) )
|
||||
{
|
||||
m_status =status_line_to;
|
||||
return path_cmd_move_to;
|
||||
}
|
||||
else
|
||||
{
|
||||
m_status = status_stop;
|
||||
return path_cmd_end_poly | path_flags_close;
|
||||
}
|
||||
}
|
||||
else
|
||||
return path_cmd_stop;
|
||||
}
|
||||
else
|
||||
{
|
||||
if( next_vertex( x, y ) )
|
||||
{
|
||||
return path_cmd_line_to;
|
||||
}
|
||||
else
|
||||
{
|
||||
m_status = status_move_to;
|
||||
return path_cmd_end_poly | path_flags_close;
|
||||
}
|
||||
}
|
||||
}
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
|
||||
} //namespace agg
|
||||
#endif //AGG_CONV_OFFSET_INCLUDED
|
||||
Loading…
Add table
Reference in a new issue