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Fixed long standing bug in elephant foot compensation of holes.

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This commit is contained in:
Vojtech Bubnik 2023-04-12 16:17:28 +02:00
parent f4b935b661
commit d3d48e9895
1 changed files with 6 additions and 2 deletions
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8
src/libslic3r/ClipperUtils.cpp
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@ -1317,8 +1317,12 @@ ExPolygons variable_offset_inner_ex(const ExPolygon &expoly, const std::vector<s
// 2) Offset the holes one by one, collect the results.
ClipperLib::Paths holes;
holes.reserve(expoly.holes.size());
for (const Polygon& hole : expoly.holes)
append(holes, fix_after_outer_offset(mittered_offset_path_scaled(hole.points, deltas[1 + &hole - expoly.holes.data()], miter_limit), ClipperLib::pftNegative, false));
for (const Polygon &hole : expoly.holes) {
ClipperLib::Path offsetted = mittered_offset_path_scaled(hole.points, deltas[1 + &hole - expoly.holes.data()], miter_limit);
// Make it CCW.
std::reverse(offsetted.begin(), offsetted.end());
append(holes, fix_after_outer_offset(offsetted, ClipperLib::pftNegative, false));
}
#ifndef NDEBUG
for (auto &c : holes)
assert(ClipperLib::Area(c) > 0.);