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Use proper morphological closing for pad creation.

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This commit is contained in:
tamasmeszaros 2021-10-20 14:34:22 +02:00
parent 79ff8a0dda
commit 39a6c13c81
1 changed files with 7 additions and 35 deletions
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42
src/libslic3r/SLA/ConcaveHull.cpp
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@ -40,36 +40,6 @@ Point ConcaveHull::centroid(const Points &pp)
return c; return c;
} }
// As it shows, the current offset_ex in ClipperUtils hangs if used in jtRound
// mode
template<typename PolygonsProvider>
static ClipperLib::Paths fast_offset(PolygonsProvider &&paths,
coord_t delta,
ClipperLib::JoinType jointype)
{
using ClipperLib::ClipperOffset;
using ClipperLib::etClosedPolygon;
using ClipperLib::Paths;
using ClipperLib::Path;
ClipperOffset offs;
offs.ArcTolerance = scaled<double>(0.01);
for (auto &p : paths)
// If the input is not at least a triangle, we can not do this algorithm
if(p.size() < 3) {
BOOST_LOG_TRIVIAL(error) << "Invalid geometry for offsetting!";
return {};
}
offs.AddPaths(std::forward<PolygonsProvider>(paths), jointype, etClosedPolygon);
Paths result;
offs.Execute(result, static_cast<double>(delta));
return result;
}
Points ConcaveHull::calculate_centroids() const Points ConcaveHull::calculate_centroids() const
{ {
// We get the centroids of all the islands in the 2D slice // We get the centroids of all the islands in the 2D slice
@ -158,15 +128,17 @@ ExPolygons ConcaveHull::to_expolygons() const
ExPolygons offset_waffle_style_ex(const ConcaveHull &hull, coord_t delta) ExPolygons offset_waffle_style_ex(const ConcaveHull &hull, coord_t delta)
{ {
ExPolygons ret = ClipperPaths_to_Slic3rExPolygons( return to_expolygons(offset_waffle_style(hull, delta));
fast_offset(fast_offset(ClipperUtils::PolygonsProvider(hull.polygons()), 2 * delta, ClipperLib::jtRound), -delta, ClipperLib::jtRound));
for (ExPolygon &p : ret) p.holes.clear();
return ret;
} }
Polygons offset_waffle_style(const ConcaveHull &hull, coord_t delta) Polygons offset_waffle_style(const ConcaveHull &hull, coord_t delta)
{ {
return to_polygons(offset_waffle_style_ex(hull, delta)); Polygons res = closing(hull.polygons(), 2 * delta, delta, ClipperLib::jtRound);
auto it = std::remove_if(res.begin(), res.end(), [](Polygon &p) { return p.is_clockwise(); });
res.erase(it, res.end());
return res;
} }
}} // namespace Slic3r::sla }} // namespace Slic3r::sla