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Fix some cases where "no perimeter on bridge" won't activate

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(when the bridge are near the border of the object)
Also the "only bridge" now won't create artifacts on the perimeter path.
supermerill/SuperSlicer#1917
This commit is contained in:
supermerill 2021-11-19 17:50:30 +01:00
parent 0d25f9b266
commit a535725e5d
2 changed files with 20 additions and 6 deletions
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2
src/libslic3r/LayerRegion.cpp
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@ -296,7 +296,7 @@ void LayerRegion::process_external_surfaces(const Layer *lower_layer, const Poly
std::vector<size_t> bridge_group(bridges.size(), (size_t)-1);
size_t n_groups = 0;
for (size_t i = 0; i < bridges.size(); ++ i) {
// A grup id for this bridge.
// A group id for this bridge.
size_t group_id = (bridge_group[i] == size_t(-1)) ? (n_groups ++) : bridge_group[i];
bridge_group[i] = group_id;
// For all possibly overlaping bridges:

24
src/libslic3r/PerimeterGenerator.cpp
View File

@ -175,7 +175,7 @@ void PerimeterGenerator::process()
for (surface_idx = 0; surface_idx < all_surfaces.size(); surface_idx++) {
Surface *surface = &all_surfaces[surface_idx];
ExPolygons last = union_ex(surface->expolygon);
ExPolygons last = { surface->expolygon };
//compute our unsupported surface
ExPolygons unsupported = diff_ex(last, *this->lower_slices, true);
if (!unsupported.empty()) {
@ -214,7 +214,8 @@ void PerimeterGenerator::process()
//check convex, has some bridge, not overhang
if (contour_simplified.size() == 1 && contour_bigger.size() == 1 && contour_simplified[0].concave_points().size() == 0
&& intersection_ex(bridgeable, { poly_unsupp }).size() > 0
&& diff_ex({ poly_unsupp_bigger }, last, true).size() == 0) {
&& diff_ex({ poly_unsupp_bigger }, union_ex(last, offset_ex(bridgeable, perimeter_spacing * 1.5)), true).size() == 0
) {
//ok, keep it
i++;
} else {
@ -298,14 +299,27 @@ void PerimeterGenerator::process()
expol.holes.clear();
unbridgeable = diff_ex(unbridgeable, bridgeable_simplified);
unbridgeable = offset2_ex(unbridgeable, -ext_perimeter_width*2, ext_perimeter_width*2);
ExPolygons bridges_temp = intersection_ex(last, diff_ex(unsupported_filtered, unbridgeable));
ExPolygons bridges_temp = offset2_ex(intersection_ex(last, diff_ex(unsupported_filtered, unbridgeable),true),-ext_perimeter_width/4, ext_perimeter_width/4);
//remove the overhangs section from the surface polygons
ExPolygons reference = last;
last = diff_ex(last, unsupported_filtered);
//ExPolygons no_bridge = diff_ex(offset_ex(unbridgeable, ext_perimeter_width * 3 / 2), last);
//bridges_temp = diff_ex(bridges_temp, no_bridge);
coordf_t bridged_infill_margin = config->bridged_infill_margin.get_abs_value(ext_perimeter_width);
unsupported_filtered = diff_ex(offset_ex(bridges_temp, bridged_infill_margin), offset_ex(unbridgeable, ext_perimeter_width * 2, jtSquare));
coordf_t bridged_infill_margin = scale_d(config->bridged_infill_margin.get_abs_value(unscaled(ext_perimeter_width)));
coordf_t offset_to_do = bridged_infill_margin;
bool first = true;
unbridgeable = diff_ex(unbridgeable, offset_ex(bridges_temp, ext_perimeter_width));
while (offset_to_do > ext_perimeter_width * 1.5) {
unbridgeable = offset2_ex(unbridgeable, -ext_perimeter_width/4, ext_perimeter_width*2.25, ClipperLib::jtSquare);
bridges_temp = diff_ex(bridges_temp, unbridgeable);
bridges_temp = offset_ex(bridges_temp, ext_perimeter_width, ClipperLib::jtMiter, 6.);
unbridgeable = diff_ex(unbridgeable, offset_ex(bridges_temp, ext_perimeter_width));
offset_to_do -= ext_perimeter_width;
first = false;
}
unbridgeable = offset_ex(unbridgeable, ext_perimeter_width + offset_to_do, ClipperLib::jtSquare);
bridges_temp = diff_ex(bridges_temp, unbridgeable);
unsupported_filtered = offset_ex(bridges_temp, offset_to_do);
unsupported_filtered = intersection_ex(unsupported_filtered, reference);
} else {
ExPolygons unbridgeable = intersection_ex(unsupported, diff_ex(unsupported_filtered, offset_ex(bridgeable_simplified, ext_perimeter_width / 2)));