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/*
#-----------------------------------------------------------------------------
# Part of osm2pgsql utility
#-----------------------------------------------------------------------------
# By Artem Pavlenko, Copyright 2007
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#-----------------------------------------------------------------------------
*/
#include <iostream>
#include <geos_c.h>
#if (GEOS_VERSION_MAJOR==3)
/* geos trunk (3.0.0rc) */
#include <geos/geom/GeometryFactory.h>
#include <geos/geom/CoordinateSequenceFactory.h>
#include <geos/geom/Geometry.h>
#include <geos/geom/LineString.h>
#include <geos/geom/LinearRing.h>
#include <geos/geom/MultiLineString.h>
#include <geos/geom/Polygon.h>
#include <geos/io/WKTReader.h>
#include <geos/io/WKTWriter.h>
#include <geos/opLinemerge.h>
using namespace geos::geom;
using namespace geos::io;
using namespace geos::operation::linemerge;
#else
/* geos-2.2 */
#include <geos/geom.h>
#include <geos/io.h>
#include <geos/opLinemerge.h>
using namespace geos;
#endif
#include "build_geometry.h"
struct Segment
{
Segment(double x0_,double y0_,double x1_,double y1_)
:x0(x0_),y0(y0_),x1(x1_),y1(y1_) {}
double x0;
double y0;
double x1;
double y1;
};
static std::vector<Segment> segs;
static std::vector<std::string> wkts;
typedef std::auto_ptr<Geometry> geom_ptr;
int is_simple(const char* wkt)
{
GeometryFactory factory;
WKTReader reader(&factory);
geom_ptr geom(reader.read(wkt));
if (geom->isSimple()) return 1;
return 0;
}
void add_segment(double x0,double y0,double x1,double y1)
{
segs.push_back(Segment(x0,y0,x1,y1));
}
const char * get_wkt(size_t index)
{
return wkts[index].c_str();
}
void clear_wkts()
{
wkts.clear();
}
size_t build_geometry(int polygon)
{
size_t wkt_size = 0;
GeometryFactory factory;
geom_ptr segment(0);
std::auto_ptr<std::vector<Geometry*> > lines(new std::vector<Geometry*>);
std::vector<Segment>::const_iterator pos=segs.begin();
std::vector<Segment>::const_iterator end=segs.end();
bool first=true;
try {
while (pos != end)
{
if (pos->x0 != pos->x1 || pos->y0 != pos->y1)
{
std::auto_ptr<CoordinateSequence> coords(factory.getCoordinateSequenceFactory()->create(0,2));
coords->add(Coordinate(pos->x0,pos->y0));
coords->add(Coordinate(pos->x1,pos->y1));
geom_ptr linestring(factory.createLineString(coords.release()));
if (first)
{
segment = linestring;
first=false;
}
else
{
lines->push_back(linestring.release());
}
}
++pos;
}
segs.clear();
if (segment.get())
{
geom_ptr mline (factory.createMultiLineString(lines.release()));
geom_ptr noded (segment->Union(mline.get()));
LineMerger merger;
merger.add(noded.get());
std::auto_ptr<std::vector<LineString *> > merged(merger.getMergedLineStrings());
WKTWriter writer;
for (unsigned i=0 ;i < merged->size(); ++i)
{
std::auto_ptr<LineString> pline ((*merged ) [i]);
if (polygon == 1 && pline->getNumPoints() > 3 && pline->isClosed())
{
std::auto_ptr<LinearRing> ring(factory.createLinearRing(pline->getCoordinates()));
geom_ptr poly(factory.createPolygon(ring.release(),0));
std::string text = writer.write(poly.get());
wkts.push_back(text);
++wkt_size;
}
else
{
std::string text = writer.write(pline.get());
wkts.push_back(text);
++wkt_size;
}
}
}
}
catch (...)
{
std::cerr << "excepton caught \n";
wkt_size = 0;
}
return wkt_size;
}
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