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Avoid creating bridges on very tiny surface cracks (SoftFever/OrcaSlicer#8563)

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Noisyfox 2025-03-29 22:58:04 +08:00
parent 41450b3a64
commit 6bd2355a69
1 changed files with 19 additions and 6 deletions
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19
src/libslic3r/PrintObject.cpp
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@ -1383,13 +1383,26 @@ void PrintObject::detect_surfaces_type()
// and top surfaces; let's do an intersection to discover them and consider them
// as bottom surfaces (to allow for bridge detection)
if (! top.empty() && ! bottom.empty()) {
// Polygons overlapping = intersection(to_polygons(top), to_polygons(bottom));
// Slic3r::debugf " layer %d contains %d membrane(s)\n", $layerm->layer->id, scalar(@$overlapping)
// if $Slic3r::debug;
const auto cracks = intersection_ex(top, bottom);
if (!cracks.empty()) {
const float small_crack_threshold = -(layerm->flow(frExternalPerimeter).scaled_width());
for (const auto& crack : cracks) {
if (offset_ex(crack, small_crack_threshold).empty()) {
// Crack too small, leave it as part of the top surface, remove it from bottom surfaces
Surfaces bot_tmp;
for (auto& b : bottom) {
surfaces_append(bot_tmp, diff_ex(b.expolygon, crack), b.surface_type);
}
bottom = std::move(bot_tmp);
}
}
Polygons top_polygons = to_polygons(std::move(top));
top.clear();
surfaces_append(top, diff_ex(top_polygons, bottom), stTop);
}
}
#ifdef SLIC3R_DEBUG_SLICE_PROCESSING
{