/
from_way.hpp
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/
from_way.hpp
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#ifndef OSMIUM_GEOMETRY_FROM_WAY_HPP
#define OSMIUM_GEOMETRY_FROM_WAY_HPP
/*
Copyright 2012 Jochen Topf <jochen@topf.org> and others (see README).
This file is part of Osmium (https://github.com/joto/osmium).
Osmium is free software: you can redistribute it and/or modify it under the
terms of the GNU Lesser General Public License or (at your option) the GNU
General Public License as published by the Free Software Foundation, either
version 3 of the Licenses, or (at your option) any later version.
Osmium 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 and the GNU
General Public License for more details.
You should have received a copy of the Licenses along with Osmium. If not, see
<http://www.gnu.org/licenses/>.
*/
#include <osmium/geometry.hpp>
#include <osmium/osm/way.hpp>
namespace Osmium {
namespace Geometry {
class FromWay : public Geometry {
protected:
FromWay(const Osmium::OSM::WayNodeList& way_node_list,
bool reverse=false,
osm_object_id_t id=0)
: Geometry(id),
m_way_node_list(&way_node_list),
m_reverse(reverse) {
}
#ifdef OSMIUM_WITH_SHPLIB
/**
* Create a SHPObject for this way and return it.
*
* Caller takes ownership. You have to call
* SHPDestroyObject() with this geometry when you are done.
*/
SHPObject* create_line_or_polygon(int shp_type) const {
if (!m_way_node_list->has_position()) {
throw std::runtime_error("node coordinates not available for building way geometry");
}
int size = m_way_node_list->size();
if (size == 0 || size == 1) {
if (Osmium::debug()) {
std::cerr << "error building way geometry for way " << id() << ": must at least contain two nodes" << std::endl;
}
throw Osmium::Exception::IllegalGeometry();
}
std::vector<double> lon_checked;
lon_checked.reserve(size);
lon_checked.push_back((*m_way_node_list)[0].position().lon());
std::vector<double> lat_checked;
lat_checked.reserve(size);
lat_checked.push_back((*m_way_node_list)[0].position().lat());
for (int i=1; i < size; i++) {
if ((*m_way_node_list)[i] == (*m_way_node_list)[i-1]) {
if (Osmium::debug()) {
std::cerr << "warning building way geometry for way " << id() << ": contains node " << (*m_way_node_list)[i].ref() << " twice" << std::endl;
}
} else if ((*m_way_node_list)[i].position() == (*m_way_node_list)[i-1].position()) {
if (Osmium::debug()) {
std::cerr << "warning building way geometry for way " << id() << ": contains position " << (*m_way_node_list)[i].position() << " twice" << std::endl;
}
} else {
lon_checked.push_back((*m_way_node_list)[i].position().lon());
lat_checked.push_back((*m_way_node_list)[i].position().lat());
}
}
if (lon_checked.size() == 1) {
if (Osmium::debug()) {
std::cerr << "error building way geometry for way " << id() << ": must at least contain two different points" << std::endl;
}
throw Osmium::Exception::IllegalGeometry();
}
if (m_reverse) {
reverse(lon_checked.begin(), lon_checked.end());
reverse(lat_checked.begin(), lat_checked.end());
}
return SHPCreateSimpleObject(shp_type, lon_checked.size(), &(lon_checked[0]), &(lat_checked[0]), NULL);
}
#endif // OSMIUM_WITH_SHPLIB
const Osmium::OSM::WayNodeList* m_way_node_list;
const bool m_reverse;
}; // class FromWay
} // namespace Geometry
} // namespace Osmium
#endif // OSMIUM_GEOMETRY_FROM_WAY_HPP