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bubnikv
2016-11-23 15:51:47 +01:00
parent 1a1eaa0810
commit d8be4de6cf
8 changed files with 500 additions and 395 deletions
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21
xs/src/libslic3r/ClipperUtils.cpp
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@@ -1004,4 +1004,25 @@ void safety_offset(ClipperLib::Paths* paths)
scaleClipperPolygons(*paths, 1.0/CLIPPER_OFFSET_SCALE);
}
Polygons top_level_islands(const Slic3r::Polygons &polygons)
{
ClipperLib::Paths input;
Slic3rMultiPoints_to_ClipperPaths(polygons, &input);
// init Clipper
ClipperLib::Clipper clipper;
clipper.Clear();
// perform union
clipper.AddPaths(input, ClipperLib::ptSubject, true);
ClipperLib::PolyTree polytree;
clipper.Execute(ClipperLib::ctUnion, polytree, ClipperLib::pftEvenOdd, ClipperLib::pftEvenOdd);
// Convert only the top level islands to the output.
Polygons out;
out.reserve(polytree.ChildCount());
for (int i = 0; i < polytree.ChildCount(); ++i) {
out.push_back(Polygon());
ClipperPath_to_Slic3rMultiPoint(polytree.Childs[i]->Contour, &out.back());
}
return out;
}
} // namespace Slic3r