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#include "../ClipperUtils.hpp"
#include "../ExPolygon.hpp"
#include "../Surface.hpp"
#include "../ExtrusionEntity.hpp"
#include "../ExtrusionEntityCollection.hpp"
#include "../MedialAxis.hpp"
#include "FillConcentric.hpp"
namespace Slic3r {
void
FillConcentric::init_spacing(coordf_t spacing, const FillParams ¶ms)
{
Fill::init_spacing(spacing, params);
if (params.density > 0.9999f && !params.dont_adjust) {
this->spacing_priv = unscaled(this->_adjust_solid_spacing(bounding_box.size()(0), _line_spacing_for_density(params.density)));
}
}
void
FillConcentric::_fill_surface_single(
const FillParams ¶ms,
unsigned int thickness_layers,
const std::pair<float, Point> &direction,
ExPolygon expolygon,
Polylines &polylines_out) const
{
// no rotation is supported for this infill pattern
BoundingBox bounding_box = expolygon.contour.bounding_box();
coord_t distance = _line_spacing_for_density(params.density);
if (params.density > 0.9999f && !params.dont_adjust) {
//it's == this->_adjust_solid_spacing(bounding_box.size()(0), _line_spacing_for_density(params.density)) because of the init_spacing()
distance = scale_(this->get_spacing());
}
Polygons loops = to_polygons(std::move(expolygon));
Polygons last = loops;
while (! last.empty()) {
last = offset2(last, -double(distance + scale_(this->get_spacing()) /2), +double(scale_(this->get_spacing()) /2));
append(loops, last);
}
// generate paths from the outermost to the innermost, to avoid
// adhesion problems of the first central tiny loops
loops = union_pt_chained_outside_in(loops, false);
// split paths using a nearest neighbor search
size_t iPathFirst = polylines_out.size();
Point last_pos(0, 0);
for (const Polygon &loop : loops) {
polylines_out.emplace_back(loop.split_at_index(last_pos.nearest_point_index(loop.points)));
last_pos = polylines_out.back().last_point();
}
// clip the paths to prevent the extruder from getting exactly on the first point of the loop
// Keep valid paths only.
size_t j = iPathFirst;
for (size_t i = iPathFirst; i < polylines_out.size(); ++ i) {
polylines_out[i].clip_end(double(this->loop_clipping));
if (polylines_out[i].is_valid()) {
if (j < i)
polylines_out[j] = std::move(polylines_out[i]);
++ j;
}
}
if (j < polylines_out.size())
polylines_out.erase(polylines_out.begin() + j, polylines_out.end());
//TODO: return ExtrusionLoop objects to get better chained paths,
// otherwise the outermost loop starts at the closest point to (0, 0).
// We want the loops to be split inside the G-code generator to get optimum path planning.
}
void
FillConcentricWGapFill::fill_surface_extrusion(
const Surface *surface,
const FillParams ¶ms,
ExtrusionEntitiesPtr &out) const {
// Perform offset.
Slic3r::ExPolygons expp = offset_ex(surface->expolygon, double(scale_(0 - 0.5 * this->get_spacing())));
// Create the infills for each of the regions.
Polylines polylines_out;
for (size_t i = 0; i < expp.size(); ++i) {
//_fill_surface_single(
//params,
//surface->thickness_layers,
//_infill_direction(surface),
//expp[i],
//polylines_out);
ExPolygon expolygon = expp[i];
coordf_t init_spacing = this->get_spacing();
// no rotation is supported for this infill pattern
BoundingBox bounding_box = expolygon.contour.bounding_box();
coord_t distance = _line_spacing_for_density(params.density);
if (params.density > 0.9999f && !params.dont_adjust) {
distance = scale_(this->get_spacing());
}
ExPolygons gaps;
Polygons loops = (Polygons)expolygon;
Polygons last = loops;
bool first = true;
while (!last.empty()) {
Polygons next_onion = offset2(last, -double(distance + scale_(this->get_spacing()) / 2), +double(scale_(this->get_spacing()) / 2));
loops.insert(loops.end(), next_onion.begin(), next_onion.end());
append(gaps, diff_ex(
offset(last, -0.5f * distance),
offset(next_onion, 0.5f * distance + 10))); // safety offset
last = next_onion;
if (first && !this->no_overlap_expolygons.empty()) {
gaps = intersection_ex(gaps, this->no_overlap_expolygons);
}
first = false;
}
// generate paths from the outermost to the innermost, to avoid
// adhesion problems of the first central tiny loops
//note: useless if we don't apply no_sort flag
//loops = union_pt_chained(loops, false);
//get the role
ExtrusionRole good_role = getRoleFromSurfaceType(params, surface);
ExtrusionEntityCollection *coll_nosort = new ExtrusionEntityCollection();
coll_nosort->set_can_sort_reverse(false, false); //can be sorted inside the pass
extrusion_entities_append_loops(
coll_nosort->entities, loops,
good_role,
params.flow.mm3_per_mm() * params.flow_mult,
params.flow.width * params.flow_mult,
params.flow.height);
//add gapfills
if (!gaps.empty() && params.density >= 1) {
// collapse
double min = 0.2 * distance * (1 - INSET_OVERLAP_TOLERANCE);
double max = 2. * distance;
ExPolygons gaps_ex = diff_ex(
offset2_ex(gaps, -min / 2, +min / 2),
offset2_ex(gaps, -max / 2, +max / 2),
true);
ThickPolylines polylines;
for (const ExPolygon &ex : gaps_ex) {
//remove too small gaps that are too hard to fill.
//ie one that are smaller than an extrusion with width of min and a length of max.
if (ex.area() > min*max) {
MedialAxis{ ex, coord_t(max), coord_t(min), coord_t(params.flow.height) }.build(polylines);
}
}
if (!polylines.empty() && !is_bridge(good_role)) {
ExtrusionEntityCollection gap_fill = thin_variable_width(polylines, erGapFill, params.flow, scale_t(params.config->get_computed_value("resolution_internal")));
//set role if needed
if (good_role != erSolidInfill) {
ExtrusionSetRole set_good_role(good_role);
gap_fill.visit(set_good_role);
}
//move them into the collection
coll_nosort->append(std::move(gap_fill.entities));
}
}
if (!coll_nosort->entities.empty())
out.push_back(coll_nosort);
else delete coll_nosort;
}
// external gapfill
ExPolygons gapfill_areas = diff_ex({ surface->expolygon }, offset_ex(expp, double(scale_(0.5 * this->get_spacing()))));
gapfill_areas = union_ex(gapfill_areas, true);
if (gapfill_areas.size() > 0) {
double minarea = double(params.flow.scaled_width()) * double(params.flow.scaled_width());
if (params.config != nullptr) minarea = scale_d(params.config->gap_fill_min_area.get_abs_value(params.flow.width)) * double(params.flow.scaled_width());
for (int i = 0; i < gapfill_areas.size(); i++) {
if (gapfill_areas[i].area() < minarea) {
gapfill_areas.erase(gapfill_areas.begin() + i);
i--;
}
}
FillParams params2{ params };
params2.role = erGapFill;
do_gap_fill(intersection_ex(gapfill_areas, no_overlap_expolygons), params2, out);
}
}
} // namespace Slic3r
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