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Support tiny floating islands inside sparse infill. You never know what can grow out of them.

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This commit is contained in:
PavelMikus 2023-02-24 14:38:08 +01:00
parent 5656d4ea6d
commit feb9310fe3
1 changed files with 12 additions and 8 deletions
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20
src/libslic3r/PrintObject.cpp
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@ -1627,15 +1627,15 @@ void PrintObject::bridge_over_infill()
for ( const LayerRegion *region : regions_to_check) {
SurfacesPtr region_internal_solids = region->fill_surfaces().filter_by_type(stInternalSolid);
// remove very small solid infills, usually not worth it and many of them may not even contain extrusions in the end.
// filter out surfaces not from this island... TODO sotre this info in the Z-Graph, so that this filtering is not needed
// NOTE: we are keeping even very small internal ensuring overhangs here. The aim is to later differentiate between expanding wall ensuring regions
// where briding them would be conterproductive, and small ensuring islands that expand into large ones, where bridging is quite necessary
region_internal_solids.erase(std::remove_if(region_internal_solids.begin(), region_internal_solids.end(),
[slice_island_tree, region](const Surface *s) {
float spacing = float(
region->bridging_flow(frSolidInfill, true).scaled_spacing());
[slice_island_tree](const Surface *s) {
if (slice_island_tree.outside(s->expolygon.contour.first_point()) > 0) {
return true;
}
return offset({s->expolygon}, -3.0 * spacing).empty();
return false;
}),
region_internal_solids.end());
if (!region_internal_solids.empty()) {
@ -1744,7 +1744,7 @@ void PrintObject::bridge_over_infill()
lower_layers_sparse_infill.insert(lower_layers_sparse_infill.end(), special_infill.begin(), special_infill.end());
if (shrink(lower_layers_sparse_infill, 6.0 * scaled(max_bridge_flow_height[candidates.first])).empty()) {
if (shrink(lower_layers_sparse_infill, 3.0 * scaled(max_bridge_flow_height[candidates.first])).empty()) {
continue;
}
}
@ -1784,12 +1784,16 @@ void PrintObject::bridge_over_infill()
for (const Surface *candidate : candidates.second) {
const Flow &flow = surface_to_region[candidate]->bridging_flow(frSolidInfill, true);
assert(candidate->surface_type == stInternalSolid);
Polygons bridged_area = expand(to_polygons(candidate->expolygon), flow.scaled_spacing());
Polygons bridged_area = expand(to_polygons(candidate->expolygon), flow.scaled_spacing());
Polygons infill_region = to_polygons(surface_to_region[candidate]->fill_expolygons());
bool touches_perimeter = !diff(bridged_area, infill_region).empty();
bool touches_solid_region_under = !intersection(bridged_area, not_sparse_infill).empty();
bridged_area =
intersection(bridged_area,
lower_layers_sparse_infill); // cut off parts which are not over sparse infill - material overflow
if (shrink(bridged_area, 4.0 * flow.scaled_spacing()).empty()) {
if ((touches_perimeter || touches_solid_region_under) && shrink(bridged_area, 5.0 * flow.scaled_spacing()).empty()) {
continue;
}