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Top Surface Expansion (#14296)

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Co-authored-by: Rodrigo Faselli <162915171+RF47@users.noreply.github.com>
This commit is contained in:
Ian Bassi
2026-07-08 14:20:40 -03:00
committed by GitHub
parent da149ee75a
commit 20a66fa99b
10 changed files with 173 additions and 1 deletions
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16
src/libslic3r/PerimeterGenerator.cpp
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@@ -571,6 +571,19 @@ static ExtrusionEntityCollection traverse_extrusions(const PerimeterGenerator& p
return extrusion_coll;
}
// ORCA: only_one_wall_top detects the top as "slice − upper", so a feature rising from the middle of a
// top surface becomes an enclosed hole that gets ringed with extra inner walls. Fill those holes back
// into the top. Only holes that are both covered by the upper layer (excludes bridges) and backed by
// solid material (excludes voids) are filled.
static ExPolygons fill_enclosed_top_feature_holes(const ExPolygons &top, const Polygons &covered_by_upper, const ExPolygons &solid)
{
ExPolygons filled = top;
for (ExPolygon &ex : filled)
ex.holes.clear();
const ExPolygons feature_holes = intersection_ex(intersection_ex(diff_ex(filled, top), covered_by_upper), solid);
return feature_holes.empty() ? top : union_ex(top, feature_holes);
}
void PerimeterGenerator::split_top_surfaces(const ExPolygons &orig_polygons, ExPolygons &top_fills,
ExPolygons &non_top_polygons, ExPolygons &fill_clip) const {
// other perimeters
@@ -636,6 +649,8 @@ void PerimeterGenerator::split_top_surfaces(const ExPolygons &orig_polygons, ExP
ExPolygons delete_bridge = diff_ex(orig_polygons, bridge_checker, ApplySafetyOffset::Yes);
ExPolygons top_polygons = diff_ex(delete_bridge, upper_polygons_series_clipped, ApplySafetyOffset::Yes);
top_polygons = fill_enclosed_top_feature_holes(top_polygons, upper_polygons_series_clipped, orig_polygons);
// get the not-top surface, from the "real top" but enlarged by external_infill_margin (and the
// min_width_top_surface we removed a bit before)
ExPolygons temp_gap = diff_ex(top_polygons, fill_clip);
@@ -2194,6 +2209,7 @@ void PerimeterGenerator::process_arachne()
upper_slices_clipped = ClipperUtils::clip_clipper_polygons_with_subject_bbox(*upper_slices, infill_contour_bbox);
top_expolygons = diff_ex(infill_contour, upper_slices_clipped);
top_expolygons = fill_enclosed_top_feature_holes(top_expolygons, upper_slices_clipped, infill_contour);
if (!top_expolygons.empty()) {
if (lower_slices != nullptr) {