sij/mapnik
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

correct 'is_empty' implementation for multi geometries

Browse source
This commit is contained in:
Artem Pavlenko 2024-02-26 14:40:36 +00:00
parent 127f9ba143
commit b911464472
1 changed files with 23 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

28
include/mapnik/geometry/is_empty.hpp
View file

@ -39,18 +39,36 @@ struct geometry_is_empty
bool operator()(mapnik::geometry::point<double> const&) const { return false; }
bool operator()(mapnik::geometry::line_string<double> const& geom) const { return geom.empty(); }
bool operator()(mapnik::geometry::line_string<double> const& line) const { return line.empty(); }
bool operator()(mapnik::geometry::polygon<double> const& geom) const
bool operator()(mapnik::geometry::polygon<double> const& poly) const
{
return geom.empty() || geom.front().empty();
for (auto const& ring : poly)
{
if (!ring.empty()) return false;
}
return true;
}
bool operator()(mapnik::geometry::multi_point<double> const& geom) const { return geom.empty(); }
bool operator()(mapnik::geometry::multi_line_string<double> const& geom) const { return geom.empty(); }
bool operator()(mapnik::geometry::multi_line_string<double> const& mline) const
{
for (auto const& line : mline)
{
if (!line.empty()) return false;
}
return true;
}
bool operator()(mapnik::geometry::multi_polygon<double> const& geom) const { return geom.empty(); }
bool operator()(mapnik::geometry::multi_polygon<double> const& mpoly) const
{
for (auto const& poly : mpoly)
{
if (!operator()(poly)) return false;
}
return true;
}
bool operator()(mapnik::geometry::geometry_collection<double> const& geom) const { return geom.empty(); }