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Various infill improvements (#2716)

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* Fix issue that sparse infill threshold no longer working

* Turn all internal sparse infill into solid infill if infill density is 100%

* Allow combining solid infill when sparse infill density is 100%
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Noisyfox 2023-11-29 21:28:23 +08:00 • committed by GitHub
parent d48c279762
commit 0fa884d9ca
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 41 additions and 61 deletions
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29
src/libslic3r/PrintObject.cpp
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@ -3315,6 +3315,13 @@ void PrintObject::combine_infill()
const bool enable_combine_infill = region.config().infill_combination.value;
if (enable_combine_infill == false || region.config().sparse_infill_density == 0.)
continue;
// Support internal solid infill when sparse_infill_density is 100%
const bool use_solid_infill = fabs(region.config().sparse_infill_density.value - 100.) < EPSILON;
const SurfaceType surface_type = use_solid_infill ? stInternalSolid : stInternal;
const InfillPattern infill_pattern = use_solid_infill ? region.config().internal_solid_infill_pattern :
region.config().sparse_infill_pattern;
// Limit the number of combined layers to the maximum height allowed by this regions' nozzle.
//FIXME limit the layer height to max_layer_height
double nozzle_diameter = std::min(
@ -3361,10 +3368,10 @@ void PrintObject::combine_infill()
layerms.emplace_back(m_layers[i]->regions()[region_id]);
// We need to perform a multi-layer intersection, so let's split it in pairs.
// Initialize the intersection with the candidates of the lowest layer.
ExPolygons intersection = to_expolygons(layerms.front()->fill_surfaces.filter_by_type(stInternal));
ExPolygons intersection = to_expolygons(layerms.front()->fill_surfaces.filter_by_type(surface_type));
// Start looping from the second layer and intersect the current intersection with it.
for (size_t i = 1; i < layerms.size(); ++ i)
intersection = intersection_ex(layerms[i]->fill_surfaces.filter_by_type(stInternal), intersection);
intersection = intersection_ex(layerms[i]->fill_surfaces.filter_by_type(surface_type), intersection);
double area_threshold = layerms.front()->infill_area_threshold();
if (! intersection.empty() && area_threshold > 0.)
intersection.erase(std::remove_if(intersection.begin(), intersection.end(),
@ -3384,21 +3391,21 @@ void PrintObject::combine_infill()
0.5f * layerms.back()->flow(frPerimeter).scaled_width() +
// Because fill areas for rectilinear and honeycomb are grown
// later to overlap perimeters, we need to counteract that too.
((region.config().sparse_infill_pattern == ipRectilinear ||
region.config().sparse_infill_pattern == ipMonotonic ||
region.config().sparse_infill_pattern == ipGrid ||
region.config().sparse_infill_pattern == ipLine ||
region.config().sparse_infill_pattern == ipHoneycomb) ? 1.5f : 0.5f) *
((infill_pattern == ipRectilinear ||
infill_pattern == ipMonotonic ||
infill_pattern == ipGrid ||
infill_pattern == ipLine ||
infill_pattern == ipHoneycomb) ? 1.5f : 0.5f) *
layerms.back()->flow(frSolidInfill).scaled_width();
for (ExPolygon &expoly : intersection)
polygons_append(intersection_with_clearance, offset(expoly, clearance_offset));
for (LayerRegion *layerm : layerms) {
Polygons internal = to_polygons(std::move(layerm->fill_surfaces.filter_by_type(stInternal)));
layerm->fill_surfaces.remove_type(stInternal);
layerm->fill_surfaces.append(diff_ex(internal, intersection_with_clearance), stInternal);
Polygons internal = to_polygons(std::move(layerm->fill_surfaces.filter_by_type(surface_type)));
layerm->fill_surfaces.remove_type(surface_type);
layerm->fill_surfaces.append(diff_ex(internal, intersection_with_clearance), surface_type);
if (layerm == layerms.back()) {
// Apply surfaces back with adjusted depth to the uppermost layer.
Surface templ(stInternal, ExPolygon());
Surface templ(surface_type, ExPolygon());
templ.thickness = 0.;
for (LayerRegion *layerm2 : layerms)
templ.thickness += layerm2->layer()->height;