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topojson - use separate local boolean to track first geometry

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This commit is contained in:
artemp 2015-09-10 15:35:25 +02:00
parent fc100be61e
commit 5e0050d005
1 changed files with 3 additions and 2 deletions
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5
plugins/input/topojson/topojson_datasource.cpp
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@ -203,14 +203,15 @@ void topojson_datasource::parse_topojson(T const& buffer)
values.reserve(topo_.geometries.size());
std::size_t geometry_index = 0;
bool first = true;
for (auto const& geom : topo_.geometries)
{
mapnik::box2d<double> box = mapnik::util::apply_visitor(mapnik::topojson::bounding_box_visitor(topo_), geom);
if (box.valid())
{
if (geometry_index == 0)
if (first)
{
first = false;
extent_ = box;
collect_attributes_visitor assessor(desc_);
mapnik::util::apply_visitor( std::ref(assessor), geom);