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WIP Refactoring of Layers: LayerIslands filled in with perimeter

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extrusions, gap fill extrusions and fill regions.
This commit is contained in:
Vojtech Bubnik 2022-11-02 12:59:31 +01:00
parent 2eb0417018
commit 409fae6183
13 changed files with 891 additions and 560 deletions
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351
src/libslic3r/Layer.cpp
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@ -380,90 +380,279 @@ void Layer::make_perimeters()
BOOST_LOG_TRIVIAL(trace) << "Generating perimeters for layer " << this->id();
// keep track of regions whose perimeters we have already generated
std::vector<unsigned char> done(m_regions.size(), false);
LayerRegionPtrs layerms;
for (LayerRegionPtrs::iterator layerm = m_regions.begin(); layerm != m_regions.end(); ++ layerm)
if ((*layerm)->slices().empty()) {
(*layerm)->m_perimeters.clear();
(*layerm)->m_fills.clear();
(*layerm)->m_thin_fills.clear();
} else {
size_t region_id = layerm - m_regions.begin();
if (done[region_id])
continue;
BOOST_LOG_TRIVIAL(trace) << "Generating perimeters for layer " << this->id() << ", region " << region_id;
done[region_id] = true;
const PrintRegionConfig &config = (*layerm)->region().config();
// find compatible regions
layerms.clear();
layerms.push_back(*layerm);
for (LayerRegionPtrs::const_iterator it = layerm + 1; it != m_regions.end(); ++it)
if (! (*it)->slices().empty()) {
LayerRegion* other_layerm = *it;
const PrintRegionConfig &other_config = other_layerm->region().config();
if (config.perimeter_extruder == other_config.perimeter_extruder
&& config.perimeters == other_config.perimeters
&& config.perimeter_speed == other_config.perimeter_speed
&& config.external_perimeter_speed == other_config.external_perimeter_speed
&& (config.gap_fill_enabled ? config.gap_fill_speed.value : 0.) ==
(other_config.gap_fill_enabled ? other_config.gap_fill_speed.value : 0.)
&& config.overhangs == other_config.overhangs
&& config.opt_serialize("perimeter_extrusion_width") == other_config.opt_serialize("perimeter_extrusion_width")
&& config.thin_walls == other_config.thin_walls
&& config.external_perimeters_first == other_config.external_perimeters_first
&& config.infill_overlap == other_config.infill_overlap
&& config.fuzzy_skin == other_config.fuzzy_skin
&& config.fuzzy_skin_thickness == other_config.fuzzy_skin_thickness
&& config.fuzzy_skin_point_dist == other_config.fuzzy_skin_point_dist)
{
other_layerm->m_perimeters.clear();
other_layerm->m_fills.clear();
other_layerm->m_thin_fills.clear();
layerms.push_back(other_layerm);
done[it - m_regions.begin()] = true;
}
}
ExPolygons fill_expolygons;
if (layerms.size() == 1) { // optimization
(*layerm)->m_fill_expolygons.clear();
(*layerm)->m_fill_surfaces.clear();
(*layerm)->make_perimeters((*layerm)->slices(), fill_expolygons);
(*layerm)->m_fill_expolygons = std::move(fill_expolygons);
} else {
SurfaceCollection new_slices;
// Use the region with highest infill rate, as the make_perimeters() function below decides on the gap fill based on the infill existence.
LayerRegion *layerm_config = layerms.front();
{
// group slices (surfaces) according to number of extra perimeters
std::map<unsigned short, Surfaces> slices; // extra_perimeters => [ surface, surface... ]
for (LayerRegion *layerm : layerms) {
for (const Surface &surface : layerm->slices())
slices[surface.extra_perimeters].emplace_back(surface);
if (layerm->region().config().fill_density > layerm_config->region().config().fill_density)
layerm_config = layerm;
layerm->m_fill_surfaces.clear();
layerm->m_fill_expolygons.clear();
}
// merge the surfaces assigned to each group
for (std::pair<const unsigned short,Surfaces> &surfaces_with_extra_perimeters : slices)
new_slices.append(offset_ex(surfaces_with_extra_perimeters.second, ClipperSafetyOffset), surfaces_with_extra_perimeters.second.front());
}
// make perimeters
layerm_config->make_perimeters(new_slices, fill_expolygons);
// assign fill_surfaces to each layer
if (! fill_expolygons.empty()) {
// Separate the fill surfaces.
for (LayerRegion *l : layerms)
l->m_fill_expolygons = intersection_ex(l->slices().surfaces, fill_expolygons);
}
}
}
std::vector<unsigned char> done(m_regions.size(), false);
std::vector<uint32_t> layer_region_ids;
std::vector<std::pair<ExtrusionRange, ExtrusionRange>> perimeter_and_gapfill_ranges;
ExPolygons fill_expolygons;
std::vector<ExPolygonRange> fill_expolygons_ranges;
SurfacesPtr surfaces_to_merge;
SurfacesPtr surfaces_to_merge_temp;
auto layer_region_reset_perimeters = [](LayerRegion &layerm) {
layerm.m_perimeters.clear();
layerm.m_fills.clear();
layerm.m_thin_fills.clear();
layerm.m_fill_expolygons.clear();
layerm.m_fill_expolygons_bboxes.clear();
layerm.m_fill_expolygons_composite.clear();
layerm.m_fill_expolygons_composite_bboxes.clear();
};
for (LayerRegionPtrs::iterator layerm = m_regions.begin(); layerm != m_regions.end(); ++ layerm)
if (size_t region_id = layerm - m_regions.begin(); ! done[region_id]) {
layer_region_reset_perimeters(**layerm);
if (! (*layerm)->slices().empty()) {
BOOST_LOG_TRIVIAL(trace) << "Generating perimeters for layer " << this->id() << ", region " << region_id;
done[region_id] = true;
const PrintRegionConfig &config = (*layerm)->region().config();
perimeter_and_gapfill_ranges.clear();
fill_expolygons.clear();
fill_expolygons_ranges.clear();
surfaces_to_merge.clear();
// find compatible regions
layer_region_ids.clear();
layer_region_ids.push_back(region_id);
for (LayerRegionPtrs::const_iterator it = layerm + 1; it != m_regions.end(); ++it)
if (! (*it)->slices().empty()) {
LayerRegion* other_layerm = *it;
const PrintRegionConfig &other_config = other_layerm->region().config();
if (config.perimeter_extruder == other_config.perimeter_extruder
&& config.perimeters == other_config.perimeters
&& config.perimeter_speed == other_config.perimeter_speed
&& config.external_perimeter_speed == other_config.external_perimeter_speed
&& (config.gap_fill_enabled ? config.gap_fill_speed.value : 0.) ==
(other_config.gap_fill_enabled ? other_config.gap_fill_speed.value : 0.)
&& config.overhangs == other_config.overhangs
&& config.opt_serialize("perimeter_extrusion_width") == other_config.opt_serialize("perimeter_extrusion_width")
&& config.thin_walls == other_config.thin_walls
&& config.external_perimeters_first == other_config.external_perimeters_first
&& config.infill_overlap == other_config.infill_overlap
&& config.fuzzy_skin == other_config.fuzzy_skin
&& config.fuzzy_skin_thickness == other_config.fuzzy_skin_thickness
&& config.fuzzy_skin_point_dist == other_config.fuzzy_skin_point_dist)
{
layer_region_reset_perimeters(*other_layerm);
layer_region_ids.push_back(it - m_regions.begin());
done[it - m_regions.begin()] = true;
}
}
if (layer_region_ids.size() == 1) { // optimization
(*layerm)->make_perimeters((*layerm)->slices(), perimeter_and_gapfill_ranges, fill_expolygons, fill_expolygons_ranges);
this->sort_perimeters_into_islands((*layerm)->slices(), region_id, perimeter_and_gapfill_ranges, std::move(fill_expolygons), fill_expolygons_ranges, layer_region_ids);
} else {
SurfaceCollection new_slices;
// Use the region with highest infill rate, as the make_perimeters() function below decides on the gap fill based on the infill existence.
LayerRegion *layerm_config = m_regions[layer_region_ids.front()];
{
// Merge slices (surfaces) according to number of extra perimeters.
for (uint32_t region_id : layer_region_ids) {
LayerRegion &layerm = *m_regions[region_id];
for (const Surface &surface : layerm.slices())
surfaces_to_merge.emplace_back(&surface);
if (layerm.region().config().fill_density > layerm_config->region().config().fill_density)
layerm_config = &layerm;
}
std::sort(surfaces_to_merge.begin(), surfaces_to_merge.end(), [](const Surface *l, const Surface *r){ return l->extra_perimeters < r->extra_perimeters; });
for (size_t i = 0; i < surfaces_to_merge.size();) {
size_t j = i;
const Surface &first = *surfaces_to_merge[i];
size_t extra_perimeters = first.extra_perimeters;
for (; j < surfaces_to_merge.size() && surfaces_to_merge[j]->extra_perimeters == extra_perimeters; ++ j) ;
if (i + 1 == j)
// Nothing to merge, just copy.
new_slices.surfaces.emplace_back(*surfaces_to_merge[i]);
else {
surfaces_to_merge_temp.assign(surfaces_to_merge.begin() + i, surfaces_to_merge.begin() + j);
new_slices.append(offset_ex(surfaces_to_merge_temp, ClipperSafetyOffset), first);
}
i = j;
}
}
// make perimeters
layerm_config->make_perimeters(new_slices, perimeter_and_gapfill_ranges, fill_expolygons, fill_expolygons_ranges);
this->sort_perimeters_into_islands(new_slices, region_id, perimeter_and_gapfill_ranges, std::move(fill_expolygons), fill_expolygons_ranges, layer_region_ids);
}
}
}
BOOST_LOG_TRIVIAL(trace) << "Generating perimeters for layer " << this->id() << " - Done";
}
void Layer::sort_perimeters_into_islands(
// Slices for which perimeters and fill_expolygons were just created.
// The slices may have been created by merging multiple source slices with the same perimeter parameters.
const SurfaceCollection &slices,
// Region where the perimeters, gap fills and fill expolygons are stored.
const uint32_t region_id,
// Perimeters and gap fills produced by the perimeter generator for the slices,
// sorted by the source slices.
const std::vector<std::pair<ExtrusionRange, ExtrusionRange>> &perimeter_and_gapfill_ranges,
// Fill expolygons produced for all source slices above.
ExPolygons &&fill_expolygons,
// Fill expolygon ranges sorted by the source slices.
const std::vector<ExPolygonRange> &fill_expolygons_ranges,
// If the current layer consists of multiple regions, then the fill_expolygons above are split by the source LayerRegion surfaces.
const std::vector<uint32_t> &layer_region_ids)
{
for (LayerSlice &lslice : this->lslices_ex)
lslice.islands.clear();
LayerRegion &this_layer_region = *m_regions[region_id];
// Bounding boxes of fill_expolygons.
BoundingBoxes fill_expolygons_bboxes;
fill_expolygons_bboxes.reserve(fill_expolygons.size());
for (const ExPolygon &expolygon : fill_expolygons)
fill_expolygons_bboxes.emplace_back(get_extents(expolygon));
// Map of source fill_expolygon into region and fill_expolygon of that region.
// -1: not set
std::vector<std::pair<int, int>> map_expolygon_to_region_and_fill;
// assign fill_surfaces to each layer
if (! fill_expolygons.empty()) {
if (layer_region_ids.size() == 1) {
this_layer_region.m_fill_expolygons = std::move(fill_expolygons);
this_layer_region.m_fill_expolygons_bboxes = std::move(fill_expolygons_bboxes);
} else {
// Sort the bounding boxes lexicographically.
std::vector<uint32_t> fill_expolygons_bboxes_sorted(fill_expolygons_bboxes.size());
std::iota(fill_expolygons_bboxes_sorted.begin(), fill_expolygons_bboxes_sorted.end(), 0);
std::sort(fill_expolygons_bboxes_sorted.begin(), fill_expolygons_bboxes_sorted.end(), [&fill_expolygons_bboxes](uint32_t lhs, uint32_t rhs){
const BoundingBox &bbl = fill_expolygons_bboxes[lhs];
const BoundingBox &bbr = fill_expolygons_bboxes[rhs];
return bbl.min < bbr.min || (bbl.min == bbr.min && bbl.max < bbr.max);
});
map_expolygon_to_region_and_fill.assign(fill_expolygons.size(), std::make_pair(-1, -1));
for (uint32_t region_idx : layer_region_ids) {
LayerRegion &l = *m_regions[region_idx];
l.m_fill_expolygons = intersection_ex(l.slices().surfaces, fill_expolygons);
l.m_fill_expolygons_bboxes.reserve(l.fill_expolygons().size());
for (const ExPolygon &expolygon : l.fill_expolygons()) {
BoundingBox bbox = get_extents(expolygon);
l.m_fill_expolygons_bboxes.emplace_back(bbox);
auto it_bbox = std::lower_bound(fill_expolygons_bboxes_sorted.begin(), fill_expolygons_bboxes_sorted.end(), bbox, [&fill_expolygons_bboxes](uint32_t lhs, const BoundingBox &bbr){
const BoundingBox &bbl = fill_expolygons_bboxes[lhs];
return bbl.min < bbr.min || (bbl.min == bbr.min && bbl.max < bbr.max);
});
if (it_bbox != fill_expolygons_bboxes_sorted.end())
if (uint32_t fill_id = *it_bbox; fill_expolygons_bboxes[fill_id] == bbox) {
// With a very high probability the two expolygons match exactly. Confirm that.
if (expolygons_match(expolygon, fill_expolygons[fill_id])) {
std::pair<int, int> &ref = map_expolygon_to_region_and_fill[fill_id];
// Only one expolygon produced by intersection with LayerRegion surface may match an expolygon of fill_expolygons.
assert(ref.first == -1);
ref.first = region_idx;
ref.second = int(&expolygon - l.fill_expolygons().data());
}
}
}
}
}
}
// Traverse the slices in an increasing order of bounding box size, so that the islands inside another islands are tested first,
// so we can just test a point inside ExPolygon::contour and we may skip testing the holes.
auto point_inside_surface = [this](const size_t lslice_idx, const Point &point) {
const BoundingBox &bbox = this->lslices_ex[lslice_idx].bbox;
return point.x() >= bbox.min.x() && point.x() < bbox.max.x() &&
point.y() >= bbox.min.y() && point.y() < bbox.max.y() &&
this->lslices[lslice_idx].contour.contains(point);
};
// Take one sample point for each source slice, to be used to sort source slices into layer slices.
// source slice index + its sample.
std::vector<std::pair<uint32_t, Point>> perimeter_slices_queue;
perimeter_slices_queue.reserve(slices.size());
for (uint32_t islice = 0; islice < uint32_t(slices.size()); ++ islice) {
const std::pair<ExtrusionRange, ExtrusionRange> &extrusions = perimeter_and_gapfill_ranges[islice];
Point sample;
bool sample_set = false;
if (! extrusions.first.empty()) {
sample = this_layer_region.perimeters().entities[*extrusions.first.begin()]->first_point();
sample_set = true;
} else if (! extrusions.second.empty()) {
sample = this_layer_region.thin_fills().entities[*extrusions.second.begin()]->first_point();
sample_set = true;
} else if (const ExPolygonRange &fill_expolygon_range = fill_expolygons_ranges[islice]; ! fill_expolygons.empty()) {
for (uint32_t iexpoly : fill_expolygon_range)
if (const ExPolygon &expoly = fill_expolygons[iexpoly]; ! expoly.empty()) {
sample = expoly.contour.points.front();
sample_set = true;
break;
}
}
if (sample_set)
perimeter_slices_queue.emplace_back(islice, sample);
}
// Sort perimeter extrusions, thin fill extrusions and fill expolygons into islands.
std::vector<uint32_t> region_fill_sorted_last;
for (int lslice_idx = int(this->lslices_ex.size()) - 1; lslice_idx >= 0 && ! perimeter_slices_queue.empty(); -- lslice_idx) {
for (auto it_source_slice = perimeter_slices_queue.begin(); it_source_slice != perimeter_slices_queue.end(); ++ it_source_slice)
if (point_inside_surface(lslice_idx, it_source_slice->second)) {
this->lslices_ex[lslice_idx].islands.push_back({});
LayerIsland &island = this->lslices_ex[lslice_idx].islands.back();
const uint32_t source_slice_idx = it_source_slice->first;
island.perimeters = LayerExtrusionRange(region_id, perimeter_and_gapfill_ranges[source_slice_idx].first);
island.thin_fills = perimeter_and_gapfill_ranges[source_slice_idx].second;
if (ExPolygonRange fill_range = fill_expolygons_ranges[source_slice_idx]; ! fill_range.empty()) {
if (layer_region_ids.size() == 1) {
// Layer island is made of one fill region only.
island.fill_expolygons = fill_range;
island.fill_region_id = region_id;
} else {
// Check whether the fill expolygons of this island were split into multiple regions.
island.fill_region_id = LayerIsland::fill_region_composite_id;
for (uint32_t fill_idx : fill_range) {
const std::pair<int, int> &kvp = map_expolygon_to_region_and_fill[fill_idx];
if (kvp.first == -1 || (island.fill_region_id != -1 && island.fill_region_id != kvp.second)) {
island.fill_region_id = LayerIsland::fill_region_composite_id;
break;
} else
island.fill_region_id = kvp.second;
}
if (island.fill_expolygons_composite()) {
// They were split, thus store the unsplit "composite" expolygons into the region of perimeters.
auto begin = uint32_t(this_layer_region.fill_expolygons_composite().size());
this_layer_region.m_fill_expolygons_composite.reserve(this_layer_region.fill_expolygons_composite().size() + fill_range.size());
std::move(fill_expolygons.begin() + *fill_range.begin(), fill_expolygons.begin() + *fill_range.end(), std::back_inserter(this_layer_region.m_fill_expolygons_composite));
this_layer_region.m_fill_expolygons_composite_bboxes.insert(this_layer_region.m_fill_expolygons_composite_bboxes.end(),
fill_expolygons_bboxes.begin() + *fill_range.begin(), fill_expolygons_bboxes.begin() + *fill_range.end());
island.fill_expolygons = ExPolygonRange(begin, uint32_t(this_layer_region.fill_expolygons_composite().size()));
} else {
if (region_fill_sorted_last.empty())
region_fill_sorted_last.assign(m_regions.size(), 0);
uint32_t &last = region_fill_sorted_last[island.fill_region_id];
// They were not split and they belong to the same region.
// Sort the region m_fill_expolygons to a continuous span.
uint32_t begin = last;
LayerRegion &layerm = *m_regions[island.fill_region_id];
for (uint32_t fill_id : fill_range) {
uint32_t region_fill_id = map_expolygon_to_region_and_fill[fill_id].second;
assert(region_fill_id >= last);
if (region_fill_id > last) {
std::swap(layerm.m_fill_expolygons[region_fill_id], layerm.m_fill_expolygons[last]);
std::swap(layerm.m_fill_expolygons_bboxes[region_fill_id], layerm.m_fill_expolygons_bboxes[last]);
}
++ last;
}
island.fill_expolygons = ExPolygonRange(begin, last);
}
}
}
if (std::next(it_source_slice) != perimeter_slices_queue.end()) {
// Remove the current slice & point pair from the queue.
*it_source_slice = perimeter_slices_queue.back();
perimeter_slices_queue.pop_back();
}
break;
}
}
}
void Layer::export_region_slices_to_svg(const char *path) const
{
BoundingBox bbox;