本文整理汇总了C++中GeometryFactory::createMultiLineString方法的典型用法代码示例。如果您正苦于以下问题：C++ GeometryFactory::createMultiLineString方法的具体用法？C++ GeometryFactory::createMultiLineString怎么用？C++ GeometryFactory::createMultiLineString使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类GeometryFactory的用法示例。
在下文中一共展示了GeometryFactory::createMultiLineString方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: build_geometry
size_t build_geometry(osmid_t osm_id, struct osmNode **xnodes, int *xcount, int make_polygon, int enable_multi, double split_at) {
size_t wkt_size = 0;
std::auto_ptr<std::vector<Geometry*> > lines(new std::vector<Geometry*>);
GeometryFactory gf;
geom_ptr geom;
#ifdef HAS_PREPARED_GEOMETRIES
geos::geom::prep::PreparedGeometryFactory pgf;
#endif
try
{
for (int c=0; xnodes[c]; c++) {
std::auto_ptr<CoordinateSequence> coords(gf.getCoordinateSequenceFactory()->create((size_t)0, (size_t)2));
for (int i = 0; i < xcount[c]; i++) {
struct osmNode *nodes = xnodes[c];
Coordinate c;
c.x = nodes[i].lon;
c.y = nodes[i].lat;
coords->add(c, 0);
}
if (coords->getSize() > 1) {
geom = geom_ptr(gf.createLineString(coords.release()));
lines->push_back(geom.release());
}
}
//geom_ptr segment(0);
geom_ptr mline (gf.createMultiLineString(lines.release()));
//geom_ptr noded (segment->Union(mline.get()));
LineMerger merger;
//merger.add(noded.get());
merger.add(mline.get());
std::auto_ptr<std::vector<LineString *> > merged(merger.getMergedLineStrings());
WKTWriter writer;
// Procces ways into lines or simple polygon list
polygondata* polys = new polygondata[merged->size()];
unsigned totalpolys = 0;
for (unsigned i=0 ;i < merged->size(); ++i)
{
std::auto_ptr<LineString> pline ((*merged ) [i]);
if (make_polygon && pline->getNumPoints() > 3 && pline->isClosed())
{
polys[totalpolys].polygon = gf.createPolygon(gf.createLinearRing(pline->getCoordinates()),0);
polys[totalpolys].ring = gf.createLinearRing(pline->getCoordinates());
polys[totalpolys].area = polys[totalpolys].polygon->getArea();
polys[totalpolys].iscontained = 0;
polys[totalpolys].containedbyid = 0;
if (polys[totalpolys].area > 0.0)
totalpolys++;
else {
delete(polys[totalpolys].polygon);
delete(polys[totalpolys].ring);
}
}
else
{
//std::cerr << "polygon(" << osm_id << ") is no good: points(" << pline->getNumPoints() << "), closed(" << pline->isClosed() << "). " << writer.write(pline.get()) << std::endl;
double distance = 0;
std::auto_ptr<CoordinateSequence> segment;
segment = std::auto_ptr<CoordinateSequence>(gf.getCoordinateSequenceFactory()->create((size_t)0, (size_t)2));
segment->add(pline->getCoordinateN(0));
for(unsigned i=1; i<pline->getNumPoints(); i++) {
segment->add(pline->getCoordinateN(i));
distance += pline->getCoordinateN(i).distance(pline->getCoordinateN(i-1));
if ((distance >= split_at) || (i == pline->getNumPoints()-1)) {
geom = geom_ptr(gf.createLineString(segment.release()));
std::string wkt = writer.write(geom.get());
wkts.push_back(wkt);
areas.push_back(0);
wkt_size++;
distance=0;
segment = std::auto_ptr<CoordinateSequence>(gf.getCoordinateSequenceFactory()->create((size_t)0, (size_t)2));
segment->add(pline->getCoordinateN(i));
}
}
//std::string text = writer.write(pline.get());
//wkts.push_back(text);
//areas.push_back(0.0);
//wkt_size++;
}
}
if (totalpolys)
{
qsort(polys, totalpolys, sizeof(polygondata), polygondata_comparearea);
unsigned toplevelpolygons = 0;
int istoplevelafterall;
for (unsigned i=0 ;i < totalpolys; ++i)
{
if (polys[i].iscontained != 0) continue;
toplevelpolygons++;
#ifdef HAS_PREPARED_GEOMETRIES
const geos::geom::prep::PreparedGeometry* preparedtoplevelpolygon = pgf.create(polys[i].polygon);
#endif
for (unsigned j=i+1; j < totalpolys; ++j)
//.........这里部分代码省略.........