159 lines
3.6 KiB
C++
159 lines
3.6 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2011 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_GEOMETRY_HPP
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#define MAPNIK_GEOMETRY_HPP
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// mapnik
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#include <mapnik/vertex_vector.hpp>
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#include <mapnik/box2d.hpp>
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// boost
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#include <boost/shared_ptr.hpp>
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#include <boost/utility.hpp>
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#include <boost/ptr_container/ptr_vector.hpp>
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namespace mapnik {
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enum eGeomType {
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Unknown = 0,
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Point = 1,
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LineString = 2,
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Polygon = 3
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};
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template <typename T, template <typename> class Container=vertex_vector>
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class geometry : private::boost::noncopyable
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{
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public:
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typedef T coord_type;
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typedef Container<coord_type> container_type;
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typedef typename container_type::value_type value_type;
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typedef typename container_type::size_type size_type;
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private:
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container_type cont_;
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eGeomType type_;
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mutable unsigned itr_;
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public:
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geometry()
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: type_(Unknown),
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itr_(0)
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{}
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explicit geometry(eGeomType type)
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: type_(type),
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itr_(0)
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{}
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eGeomType type() const
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{
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return type_;
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}
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void set_type(eGeomType type)
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{
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type_ = type;
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}
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container_type const& data() const
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{
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return cont_;
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}
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size_type size() const
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{
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return cont_.size();
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}
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box2d<double> envelope() const
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{
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box2d<double> result;
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double x = 0;
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double y = 0;
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rewind(0);
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for (unsigned i=0;i<size();++i)
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{
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vertex(&x,&y);
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if (i==0)
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{
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result.init(x,y,x,y);
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}
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else
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{
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result.expand_to_include(x,y);
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}
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}
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return result;
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}
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void push_vertex(coord_type x, coord_type y, CommandType c)
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{
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cont_.push_back(x,y,c);
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}
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void line_to(coord_type x,coord_type y)
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{
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push_vertex(x,y,SEG_LINETO);
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}
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void move_to(coord_type x,coord_type y)
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{
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push_vertex(x,y,SEG_MOVETO);
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}
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void close(coord_type x, coord_type y)
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{
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push_vertex(x,y,SEG_CLOSE);
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}
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void close()
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{
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if (cont_.size() > 3)
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{
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cont_.set_command(cont_.size() - 1, SEG_CLOSE);
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}
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}
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unsigned vertex(double* x, double* y) const
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{
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return cont_.get_vertex(itr_++,x,y);
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}
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unsigned vertex(std::size_t index, double* x, double* y) const
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{
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return cont_.get_vertex(index, x, y);
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}
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void rewind(unsigned ) const
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{
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itr_=0;
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}
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};
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typedef geometry<double,vertex_vector> geometry_type;
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typedef boost::shared_ptr<geometry_type> geometry_ptr;
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typedef boost::ptr_vector<geometry_type> geometry_container;
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}
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#endif // MAPNIK_GEOMETRY_HPP
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