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[dissolve][test] enhance debug information by showing positive/negative rings

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This commit is contained in:
Barend Gehrels 2018-01-12 16:29:17 +01:00
parent 4902e1ef25
commit 29bb764bfc
1 changed files with 5 additions and 2 deletions
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7
extensions/test/algorithms/dissolve.cpp
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@ -241,8 +241,11 @@ struct map_visitor
typedef typename boost::range_value<Rings>::type ring_type; typedef typename boost::range_value<Rings>::type ring_type;
BOOST_FOREACH(ring_type const& ring, rings) BOOST_FOREACH(ring_type const& ring, rings)
{ {
m_mapper.map(ring, "fill-opacity:0.1;fill:rgb(0,0,255);" double const area = bg::area(ring);
"stroke:rgb(0,0,255);stroke-width:0.1"); std::string const color = area < 0 ? "rgb(255,0,0)" : "rgb(0,0,255)";
std::string const style = "stroke:" + color
+ ";stroke-width:0.1;fill-opacity:0.1;fill:" + color;
m_mapper.map(ring, style);
} }
} }