3DPrinting/PrusaSlicer-NonPlainar
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WIP ensure vertical wall thickness: Reduced amount of shell region

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expansion, added filling in of narrow regions between solid infills
(for example created by propagating shell from the side and from
the top at the same time).
This commit is contained in:
Vojtech Bubnik 2023-01-02 14:59:40 +01:00
parent f828cba5f0
commit 785ef08656
1 changed files with 34 additions and 16 deletions
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50
src/libslic3r/PrintObject.cpp
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@ -1147,6 +1147,9 @@ void PrintObject::discover_vertical_shells()
};
std::vector<DiscoverVerticalShellsCacheEntry> cache_top_botom_regions(num_layers, DiscoverVerticalShellsCacheEntry());
bool top_bottom_surfaces_all_regions = this->num_printing_regions() > 1 && ! m_config.interface_shells.value;
// static constexpr const float top_bottom_expansion_coeff = 1.05f;
// Just a tiny fraction of an infill extrusion width to merge neighbor regions reliably.
static constexpr const float top_bottom_expansion_coeff = 0.05f;
if (top_bottom_surfaces_all_regions) {
// This is a multi-material print and interface_shells are disabled, meaning that the vertical shell thickness
// is calculated over all materials.
@ -1182,14 +1185,14 @@ void PrintObject::discover_vertical_shells()
++ debug_idx;
#endif /* SLIC3R_DEBUG_SLICE_PROCESSING */
for (size_t region_id = 0; region_id < num_regions; ++ region_id) {
LayerRegion &layerm = *layer.m_regions[region_id];
float min_perimeter_infill_spacing = float(layerm.flow(frSolidInfill).scaled_spacing()) * 1.05f;
LayerRegion &layerm = *layer.m_regions[region_id];
float top_bottom_expansion = float(layerm.flow(frSolidInfill).scaled_spacing()) * top_bottom_expansion_coeff;
// Top surfaces.
append(cache.top_surfaces, offset(layerm.slices().filter_by_type(stTop), min_perimeter_infill_spacing));
append(cache.top_surfaces, offset(layerm.fill_surfaces().filter_by_type(stTop), min_perimeter_infill_spacing));
append(cache.top_surfaces, offset(layerm.slices().filter_by_type(stTop), top_bottom_expansion));
// append(cache.top_surfaces, offset(layerm.fill_surfaces().filter_by_type(stTop), top_bottom_expansion));
// Bottom surfaces.
append(cache.bottom_surfaces, offset(layerm.slices().filter_by_types(surfaces_bottom), min_perimeter_infill_spacing));
append(cache.bottom_surfaces, offset(layerm.fill_surfaces().filter_by_types(surfaces_bottom), min_perimeter_infill_spacing));
append(cache.bottom_surfaces, offset(layerm.slices().filter_by_types(surfaces_bottom), top_bottom_expansion));
// append(cache.bottom_surfaces, offset(layerm.fill_surfaces().filter_by_types(surfaces_bottom), top_bottom_expansion));
// Calculate the maximum perimeter offset as if the slice was extruded with a single extruder only.
// First find the maxium number of perimeters per region slice.
unsigned int perimeters = 0;
@ -1252,16 +1255,16 @@ void PrintObject::discover_vertical_shells()
const std::initializer_list<SurfaceType> surfaces_bottom { stBottom, stBottomBridge };
for (size_t idx_layer = range.begin(); idx_layer < range.end(); ++ idx_layer) {
m_print->throw_if_canceled();
Layer &layer = *m_layers[idx_layer];
LayerRegion &layerm = *layer.m_regions[region_id];
float min_perimeter_infill_spacing = float(layerm.flow(frSolidInfill).scaled_spacing()) * 1.05f;
Layer &layer = *m_layers[idx_layer];
LayerRegion &layerm = *layer.m_regions[region_id];
float top_bottom_expansion = float(layerm.flow(frSolidInfill).scaled_spacing()) * top_bottom_expansion_coeff;
// Top surfaces.
auto &cache = cache_top_botom_regions[idx_layer];
cache.top_surfaces = offset(layerm.slices().filter_by_type(stTop), min_perimeter_infill_spacing);
append(cache.top_surfaces, offset(layerm.fill_surfaces().filter_by_type(stTop), min_perimeter_infill_spacing));
cache.top_surfaces = offset(layerm.slices().filter_by_type(stTop), top_bottom_expansion);
// append(cache.top_surfaces, offset(layerm.fill_surfaces().filter_by_type(stTop), top_bottom_expansion));
// Bottom surfaces.
cache.bottom_surfaces = offset(layerm.slices().filter_by_types(surfaces_bottom), min_perimeter_infill_spacing);
append(cache.bottom_surfaces, offset(layerm.fill_surfaces().filter_by_types(surfaces_bottom), min_perimeter_infill_spacing));
cache.bottom_surfaces = offset(layerm.slices().filter_by_types(surfaces_bottom), top_bottom_expansion);
// append(cache.bottom_surfaces, offset(layerm.fill_surfaces().filter_by_types(surfaces_bottom), top_bottom_expansion));
// Holes over all regions. Only collect them once, they are valid for all region_id iterations.
if (cache.holes.empty()) {
for (size_t region_id = 0; region_id < layer.regions().size(); ++ region_id)
@ -1437,9 +1440,24 @@ void PrintObject::discover_vertical_shells()
Polygons shell_before = shell;
#endif /* SLIC3R_DEBUG_SLICE_PROCESSING */
#if 1
// Intentionally inflate a bit more than how much the region has been shrunk,
// so there will be some overlap between this solid infill and the other infill regions (mainly the sparse infill).
shell = opening(union_(shell), 0.5f * min_perimeter_infill_spacing, 0.8f * min_perimeter_infill_spacing, ClipperLib::jtSquare);
{
// Open to remove (filter out) regions narrower than a bit less than an infill extrusion line width.
// Such narrow regions are difficult to fill in with a gap fill algorithm (or Arachne), however they are most likely
// not needed for print stability / quality.
const float narrow_ensure_vertical_wall_thickness_region_radius = 0.5f * 0.65f * min_perimeter_infill_spacing;
// Then close gaps narrower than 1.2 * line width, such gaps are difficult to fill in with sparse infill,
// thus they will be merged into the solid infill.
const float narrow_sparse_infill_region_radius = 0.5f * 1.2f * min_perimeter_infill_spacing;
// Finally expand the infill a bit to remove tiny gaps between solid infill and the other regions.
const float tiny_overlap_radius = 0.2f * min_perimeter_infill_spacing;
shell = shrink(opening(union_(shell),
// Open to remove (filter out) regions narrower than an infill extrusion line width.
narrow_ensure_vertical_wall_thickness_region_radius,
// Then close gaps narrower than 1.2 * line width, such gaps are difficult to fill in with sparse infill.
narrow_ensure_vertical_wall_thickness_region_radius + narrow_sparse_infill_region_radius, ClipperLib::jtSquare),
// Finally expand the infill a bit to remove tiny gaps between solid infill and the other regions.
narrow_sparse_infill_region_radius - tiny_overlap_radius, ClipperLib::jtSquare);
}
if (shell.empty())
continue;
#else