本文整理汇总了C++中GeometryFactory::createMultiPolygon方法的典型用法代码示例。如果您正苦于以下问题：C++ GeometryFactory::createMultiPolygon方法的具体用法？C++ GeometryFactory::createMultiPolygon怎么用？C++ GeometryFactory::createMultiPolygon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::createMultiPolygon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
//.........这里部分代码省略.........
// FIXME: This code does not work as intended
// It should be setting the polys[k].ring in order to update this object
// but the value of polys[k].polygon calculated is normally NULL
// Add polygon this polygon (j) to k since they intersect
// Mark ourselfs to be dropped (2), delete the original k
Geometry* polyunion = polys[k].polygon->Union(polys[j].polygon);
delete(polys[k].polygon);
polys[k].polygon = dynamic_cast<Polygon*>(polyunion);
polys[j].iscontained = 2; // Drop
istoplevelafterall = 2;
break;
}
#endif
}
if (istoplevelafterall == 0)
{
polys[j].iscontained = 1;
polys[j].containedbyid = i;
}
}
}
#ifdef HAS_PREPARED_GEOMETRIES
pgf.destroy(preparedtoplevelpolygon);
#endif
}
// polys now is a list of ploygons tagged with which ones are inside each other
// List of polygons for multipolygon
std::auto_ptr<std::vector<Geometry*> > polygons(new std::vector<Geometry*>);
// For each top level polygon create a new polygon including any holes
for (unsigned i=0 ;i < totalpolys; ++i)
{
if (polys[i].iscontained != 0) continue;
// List of holes for this top level polygon
std::auto_ptr<std::vector<Geometry*> > interior(new std::vector<Geometry*>);
for (unsigned j=i+1; j < totalpolys; ++j)
{
if (polys[j].iscontained == 1 && polys[j].containedbyid == i)
{
interior->push_back(polys[j].ring);
}
}
Polygon* poly(gf.createPolygon(polys[i].ring, interior.release()));
poly->normalize();
polygons->push_back(poly);
}
// Make a multipolygon if required
if ((toplevelpolygons > 1) && enable_multi)
{
std::auto_ptr<MultiPolygon> multipoly(gf.createMultiPolygon(polygons.release()));
//if (multipoly->isValid())
//{
std::string text = writer.write(multipoly.get());
wkts.push_back(text);
areas.push_back(multipoly->getArea());
wkt_size++;
//}
}
else
{
for(unsigned i=0; i<toplevelpolygons; i++)
{
Polygon* poly = dynamic_cast<Polygon*>(polygons->at(i));;
//if (poly->isValid())
//{
std::string text = writer.write(poly);
wkts.push_back(text);
areas.push_back(poly->getArea());
wkt_size++;
//}
delete(poly);
}
}
}
for (unsigned i=0; i < totalpolys; ++i)
{
delete(polys[i].polygon);
}
delete[](polys);
}
catch (std::exception& e)
{
std::cerr << std::endl << "Standard exception processing way_id "<< osm_id << ": " << e.what() << std::endl;
wkt_size = 0;
}
catch (...)
{
std::cerr << std::endl << "Exception caught processing way id=" << osm_id << std::endl;
wkt_size = 0;
}
return wkt_size;
}