156 lines
3.6 KiB
C++
156 lines
3.6 KiB
C++
/*****************************************************************************
|
|
*
|
|
* This file is part of Mapnik (c++ mapping toolkit)
|
|
*
|
|
* Copyright (C) 2011 Artem Pavlenko
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#ifndef MAPNIK_GEOMETRY_HPP
|
|
#define MAPNIK_GEOMETRY_HPP
|
|
|
|
// mapnik
|
|
#include <mapnik/vertex_vector.hpp>
|
|
#include <mapnik/box2d.hpp>
|
|
#include <mapnik/noncopyable.hpp>
|
|
|
|
namespace mapnik {
|
|
|
|
template <typename T, template <typename> class Container=vertex_vector>
|
|
class geometry : private mapnik::noncopyable
|
|
{
|
|
|
|
public:
|
|
static const std::uint8_t geometry_bits = 7;
|
|
enum types : std::uint8_t
|
|
{
|
|
Unknown = 0x00,
|
|
Point = 0x01,
|
|
LineString = 0x02,
|
|
Polygon = 0x03,
|
|
PolygonExterior = Polygon,
|
|
PolygonInterior = Polygon | ( 1 << geometry_bits)
|
|
};
|
|
using coord_type = T;
|
|
using container_type = Container<coord_type>;
|
|
using value_type = typename container_type::value_type;
|
|
using size_type = typename container_type::size_type;
|
|
private:
|
|
container_type cont_;
|
|
types type_;
|
|
mutable size_type itr_;
|
|
public:
|
|
|
|
geometry()
|
|
: type_(Unknown),
|
|
itr_(0)
|
|
{}
|
|
|
|
explicit geometry(types type)
|
|
: type_(type),
|
|
itr_(0)
|
|
{}
|
|
|
|
types type() const
|
|
{
|
|
return static_cast<types>(type_ & types::Polygon);
|
|
}
|
|
|
|
bool interior() const
|
|
{
|
|
return static_cast<bool>(type_ >> geometry_bits);
|
|
}
|
|
|
|
void set_type(types type)
|
|
{
|
|
type_ = type;
|
|
}
|
|
|
|
container_type const& data() const
|
|
{
|
|
return cont_;
|
|
}
|
|
|
|
size_type size() const
|
|
{
|
|
return cont_.size();
|
|
}
|
|
|
|
box2d<double> envelope() const
|
|
{
|
|
box2d<double> result;
|
|
double x = 0;
|
|
double y = 0;
|
|
rewind(0);
|
|
size_type geom_size = size();
|
|
for (size_type i = 0; i < geom_size; ++i)
|
|
{
|
|
unsigned cmd = vertex(&x,&y);
|
|
if (cmd == SEG_CLOSE) continue;
|
|
if (i == 0)
|
|
{
|
|
result.init(x,y,x,y);
|
|
}
|
|
else
|
|
{
|
|
result.expand_to_include(x,y);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
void push_vertex(coord_type x, coord_type y, CommandType c)
|
|
{
|
|
cont_.push_back(x,y,c);
|
|
}
|
|
|
|
void line_to(coord_type x,coord_type y)
|
|
{
|
|
push_vertex(x,y,SEG_LINETO);
|
|
}
|
|
|
|
void move_to(coord_type x,coord_type y)
|
|
{
|
|
push_vertex(x,y,SEG_MOVETO);
|
|
}
|
|
|
|
void close_path()
|
|
{
|
|
push_vertex(0,0,SEG_CLOSE);
|
|
}
|
|
|
|
unsigned vertex(double* x, double* y) const
|
|
{
|
|
return cont_.get_vertex(itr_++,x,y);
|
|
}
|
|
|
|
unsigned vertex(std::size_t index, double* x, double* y) const
|
|
{
|
|
return cont_.get_vertex(index, x, y);
|
|
}
|
|
|
|
void rewind(unsigned ) const
|
|
{
|
|
itr_=0;
|
|
}
|
|
};
|
|
|
|
using geometry_type = geometry<double,vertex_vector>;
|
|
|
|
}
|
|
|
|
#endif // MAPNIK_GEOMETRY_HPP
|