void simplify_polygons(const Slic3r::Polygons &subject, Slic3r::ExPolygons* retval, bool preserve_collinear)
{
PROFILE_FUNC();
if (!preserve_collinear) {
Polygons polygons;
simplify_polygons(subject, &polygons, preserve_collinear);
union_(polygons, retval);
return;
}
// convert into Clipper polygons
ClipperLib::Paths input_subject;
Slic3rMultiPoints_to_ClipperPaths(subject, &input_subject);
ClipperLib::PolyTree polytree;
ClipperLib::Clipper c;
c.PreserveCollinear(true);
c.StrictlySimple(true);
c.AddPaths(input_subject, ClipperLib::ptSubject, true);
c.Execute(ClipperLib::ctUnion, polytree, ClipperLib::pftNonZero, ClipperLib::pftNonZero);
// convert into ExPolygons
PolyTreeToExPolygons(polytree, retval);
}
void simplify_polygons(const Slic3r::Polygons &subject, Slic3r::Polygons* retval, bool preserve_collinear)
{
// convert into Clipper polygons
ClipperLib::Paths input_subject, output;
Slic3rMultiPoints_to_ClipperPaths(subject, &input_subject);
if (preserve_collinear) {
ClipperLib::Clipper c;
c.PreserveCollinear(true);
c.StrictlySimple(true);
c.AddPaths(input_subject, ClipperLib::ptSubject, true);
c.Execute(ClipperLib::ctUnion, output, ClipperLib::pftNonZero, ClipperLib::pftNonZero);
} else {
ClipperLib::SimplifyPolygons(input_subject, output, ClipperLib::pftNonZero);
}
// convert into Slic3r polygons
ClipperPaths_to_Slic3rMultiPoints(output, retval);
}
ExPolygons simplify_polygons_ex(const Polygons &subject, bool preserve_collinear)
{
if (! preserve_collinear)
return union_ex(simplify_polygons(subject, false));
// convert into Clipper polygons
ClipperLib::Paths input_subject = Slic3rMultiPoints_to_ClipperPaths(subject);
ClipperLib::PolyTree polytree;
ClipperLib::Clipper c;
c.PreserveCollinear(true);
c.StrictlySimple(true);
c.AddPaths(input_subject, ClipperLib::ptSubject, true);
c.Execute(ClipperLib::ctUnion, polytree, ClipperLib::pftNonZero, ClipperLib::pftNonZero);
// convert into ExPolygons
return PolyTreeToExPolygons(polytree);
}