3DPrinting/PrusaSlicer-NonPlainar
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Fix SPE-1685 Tiny holes in external bridges and top solid

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During external surfaces processing, the regions are expanded a little to
absorb unassigned regions that emerge during ensuring regularization
This commit is contained in:
Pavel Mikus 2023-06-02 12:33:24 +02:00
parent e1a7a80183
commit f1e287e0c9
1 changed files with 19 additions and 6 deletions
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25
src/libslic3r/LayerRegion.cpp
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@ -1,4 +1,5 @@
#include "ExPolygon.hpp"
#include "Flow.hpp"
#include "Layer.hpp"
#include "BridgeDetector.hpp"
#include "ClipperUtils.hpp"
@ -169,7 +170,8 @@ static ExPolygons fill_surfaces_extract_expolygons(Surfaces &surfaces, std::init
Surfaces expand_bridges_detect_orientations(
Surfaces &surfaces,
ExPolygons &shells,
const Algorithm::RegionExpansionParameters &expansion_params)
const Algorithm::RegionExpansionParameters &expansion_params,
const float closing_diameter)
{
using namespace Slic3r::Algorithm;
@ -309,8 +311,13 @@ Surfaces expand_bridges_detect_orientations(
}
//FIXME try to be smart and pick the best bridging angle for all?
templ.bridge_angle = bridges[bridge_id].angle;
//NOTE: The current regularization of the shells can create small unasigned regions in the object (E.G. benchy)
// without the following closing operation, those regions will stay unfilled and cause small holes in the expanded surface.
// look for narrow_ensure_vertical_wall_thickness_region_radius filter.
ExPolygons final = closing_ex(acc, closing_diameter);
// without safety offset, artifacts are generated (GH #2494)
for (ExPolygon &ex : union_safety_offset_ex(acc))
// union_safety_offset_ex(acc)
for (ExPolygon &ex : final)
out.emplace_back(templ, std::move(ex));
}
}
@ -327,6 +334,7 @@ static Surfaces expand_merge_surfaces(
SurfaceType surface_type,
ExPolygons &shells,
const Algorithm::RegionExpansionParameters &params,
const float closing_diameter,
const double bridge_angle = -1.)
{
double thickness;
@ -335,6 +343,10 @@ static Surfaces expand_merge_surfaces(
return {};
std::vector<ExPolygon> expanded = expand_merge_expolygons(std::move(src), shells, params);
//NOTE: The current regularization of the shells can create small unasigned regions in the object (E.G. benchy)
// without the following closing operation, those regions will stay unfilled and cause small holes in the expanded surface.
// look for narrow_ensure_vertical_wall_thickness_region_radius filter.
expanded = closing_ex(expanded, closing_diameter);
// Trim the shells by the expanded expolygons.
shells = diff_ex(shells, expanded);
@ -373,6 +385,7 @@ void LayerRegion::process_external_surfaces(const Layer *lower_layer, const Poly
static constexpr const float expansion_step = scaled<float>(0.1);
// Don't take more than max_nr_steps for small expansion_step.
static constexpr const size_t max_nr_expansion_steps = 5;
const float closing_diameter = 0.65f * 1.05 * this->flow(frSolidInfill).scaled_spacing();
// Expand the top / bottom / bridge surfaces into the shell thickness solid infills.
double layer_thickness;
@ -384,8 +397,8 @@ void LayerRegion::process_external_surfaces(const Layer *lower_layer, const Poly
const double custom_angle = this->region().config().bridge_angle.value;
const auto params = Algorithm::RegionExpansionParameters::build(expansion_bottom_bridge, expansion_step, max_nr_expansion_steps);
bridges.surfaces = custom_angle > 0 ?
expand_merge_surfaces(m_fill_surfaces.surfaces, stBottomBridge, shells, params, Geometry::deg2rad(custom_angle)) :
expand_bridges_detect_orientations(m_fill_surfaces.surfaces, shells, params);
expand_merge_surfaces(m_fill_surfaces.surfaces, stBottomBridge, shells, params, closing_diameter, Geometry::deg2rad(custom_angle)) :
expand_bridges_detect_orientations(m_fill_surfaces.surfaces, shells, params, closing_diameter);
BOOST_LOG_TRIVIAL(trace) << "Processing external surface, detecting bridges - done";
#if 0
{
@ -396,9 +409,9 @@ void LayerRegion::process_external_surfaces(const Layer *lower_layer, const Poly
}
Surfaces bottoms = expand_merge_surfaces(m_fill_surfaces.surfaces, stBottom, shells,
Algorithm::RegionExpansionParameters::build(expansion_bottom, expansion_step, max_nr_expansion_steps));
Algorithm::RegionExpansionParameters::build(expansion_bottom, expansion_step, max_nr_expansion_steps), closing_diameter);
Surfaces tops = expand_merge_surfaces(m_fill_surfaces.surfaces, stTop, shells,
Algorithm::RegionExpansionParameters::build(expansion_top, expansion_step, max_nr_expansion_steps));
Algorithm::RegionExpansionParameters::build(expansion_top, expansion_step, max_nr_expansion_steps), closing_diameter);
m_fill_surfaces.remove_types({ stBottomBridge, stBottom, stTop, stInternalSolid });
reserve_more(m_fill_surfaces.surfaces, shells.size() + bridges.size() + bottoms.size() + tops.size());