247 lines
11 KiB
C++
247 lines
11 KiB
C++
#include "Layer.hpp"
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#include "ClipperUtils.hpp"
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#include "Print.hpp"
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#include "Fill/Fill.hpp"
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#include "ShortestPath.hpp"
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#include "SVG.hpp"
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#include <boost/log/trivial.hpp>
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namespace Slic3r {
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Layer::~Layer()
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{
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this->lower_layer = this->upper_layer = nullptr;
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for (LayerRegion *region : m_regions)
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delete region;
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m_regions.clear();
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}
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// Test whether whether there are any slices assigned to this layer.
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bool Layer::empty() const
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{
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for (const LayerRegion *layerm : m_regions)
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if (layerm != nullptr && ! layerm->slices.empty())
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// Non empty layer.
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return false;
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return true;
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}
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LayerRegion* Layer::add_region(PrintRegion* print_region)
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{
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m_regions.emplace_back(new LayerRegion(this, print_region));
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return m_regions.back();
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}
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// merge all regions' slices to get islands
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void Layer::make_slices()
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{
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ExPolygons slices;
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if (m_regions.size() == 1) {
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// optimization: if we only have one region, take its slices
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slices = m_regions.front()->slices;
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} else {
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Polygons slices_p;
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for (LayerRegion *layerm : m_regions)
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polygons_append(slices_p, to_polygons(layerm->slices));
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slices = union_ex(slices_p);
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}
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this->lslices.clear();
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this->lslices.reserve(slices.size());
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// prepare ordering points
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Points ordering_points;
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ordering_points.reserve(slices.size());
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for (const ExPolygon &ex : slices)
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ordering_points.push_back(ex.contour.first_point());
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// sort slices
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std::vector<Points::size_type> order = chain_points(ordering_points);
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// populate slices vector
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for (size_t i : order)
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this->lslices.emplace_back(std::move(slices[i]));
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}
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// Merge typed slices into untyped slices. This method is used to revert the effects of detect_surfaces_type() called for posPrepareInfill.
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void Layer::merge_slices()
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{
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if (m_regions.size() == 1 && (this->id() > 0 || this->object()->config().elefant_foot_compensation.value == 0)) {
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// Optimization, also more robust. Don't merge classified pieces of layerm->slices,
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// but use the non-split islands of a layer. For a single region print, these shall be equal.
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// Don't use this optimization on 1st layer with Elephant foot compensation applied, as this->lslices are uncompensated,
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// while regions are compensated.
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m_regions.front()->slices.set(this->lslices, stInternal);
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} else {
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for (LayerRegion *layerm : m_regions)
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// without safety offset, artifacts are generated (upstream Slic3r GH #2494)
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layerm->slices.set(union_ex(to_polygons(std::move(layerm->slices.surfaces)), true), stInternal);
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}
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}
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ExPolygons Layer::merged(float offset_scaled) const
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{
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assert(offset_scaled >= 0.f);
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// If no offset is set, apply EPSILON offset before union, and revert it afterwards.
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float offset_scaled2 = 0;
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if (offset_scaled == 0.f) {
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offset_scaled = float( EPSILON);
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offset_scaled2 = float(- EPSILON);
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}
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Polygons polygons;
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for (LayerRegion *layerm : m_regions) {
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const PrintRegionConfig &config = layerm->region()->config();
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// Our users learned to bend Slic3r to produce empty volumes to act as subtracters. Only add the region if it is non-empty.
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if (config.bottom_solid_layers > 0 || config.top_solid_layers > 0 || config.fill_density > 0. || config.perimeters > 0)
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append(polygons, offset(to_expolygons(layerm->slices.surfaces), offset_scaled));
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}
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ExPolygons out = union_ex(polygons);
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if (offset_scaled2 != 0.f)
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out = offset_ex(out, offset_scaled2);
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return out;
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}
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// Here the perimeters are created cummulatively for all layer regions sharing the same parameters influencing the perimeters.
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// The perimeter paths and the thin fills (ExtrusionEntityCollection) are assigned to the first compatible layer region.
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// The resulting fill surface is split back among the originating regions.
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void Layer::make_perimeters()
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{
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BOOST_LOG_TRIVIAL(trace) << "Generating perimeters for layer " << this->id();
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// keep track of regions whose perimeters we have already generated
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std::vector<unsigned char> done(m_regions.size(), false);
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for (LayerRegionPtrs::iterator layerm = m_regions.begin(); layerm != m_regions.end(); ++ layerm)
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if ((*layerm)->slices.empty()) {
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(*layerm)->perimeters.clear();
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(*layerm)->fills.clear();
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(*layerm)->thin_fills.clear();
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} else {
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size_t region_id = layerm - m_regions.begin();
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if (done[region_id])
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continue;
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BOOST_LOG_TRIVIAL(trace) << "Generating perimeters for layer " << this->id() << ", region " << region_id;
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done[region_id] = true;
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const PrintRegionConfig &config = (*layerm)->region()->config();
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// find compatible regions
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LayerRegionPtrs layerms;
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layerms.push_back(*layerm);
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for (LayerRegionPtrs::const_iterator it = layerm + 1; it != m_regions.end(); ++it)
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if (! (*it)->slices.empty()) {
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LayerRegion* other_layerm = *it;
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const PrintRegionConfig &other_config = other_layerm->region()->config();
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if (config.perimeter_extruder == other_config.perimeter_extruder
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&& config.perimeters == other_config.perimeters
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&& config.perimeter_speed == other_config.perimeter_speed
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&& config.external_perimeter_speed == other_config.external_perimeter_speed
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&& config.gap_fill_speed == other_config.gap_fill_speed
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&& config.overhangs == other_config.overhangs
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&& config.opt_serialize("perimeter_extrusion_width") == other_config.opt_serialize("perimeter_extrusion_width")
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&& config.thin_walls == other_config.thin_walls
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&& config.external_perimeters_first == other_config.external_perimeters_first
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&& config.infill_overlap == other_config.infill_overlap)
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{
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other_layerm->perimeters.clear();
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other_layerm->fills.clear();
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other_layerm->thin_fills.clear();
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layerms.push_back(other_layerm);
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done[it - m_regions.begin()] = true;
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}
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}
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if (layerms.size() == 1) { // optimization
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(*layerm)->fill_surfaces.surfaces.clear();
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(*layerm)->make_perimeters((*layerm)->slices, &(*layerm)->fill_surfaces);
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(*layerm)->fill_expolygons = to_expolygons((*layerm)->fill_surfaces.surfaces);
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} else {
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SurfaceCollection new_slices;
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// Use the region with highest infill rate, as the make_perimeters() function below decides on the gap fill based on the infill existence.
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LayerRegion *layerm_config = layerms.front();
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{
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// group slices (surfaces) according to number of extra perimeters
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std::map<unsigned short, Surfaces> slices; // extra_perimeters => [ surface, surface... ]
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for (LayerRegion *layerm : layerms) {
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for (Surface &surface : layerm->slices.surfaces)
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slices[surface.extra_perimeters].emplace_back(surface);
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if (layerm->region()->config().fill_density > layerm_config->region()->config().fill_density)
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layerm_config = layerm;
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}
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// merge the surfaces assigned to each group
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for (std::pair<const unsigned short,Surfaces> &surfaces_with_extra_perimeters : slices)
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new_slices.append(union_ex(surfaces_with_extra_perimeters.second, true), surfaces_with_extra_perimeters.second.front());
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}
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// make perimeters
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SurfaceCollection fill_surfaces;
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layerm_config->make_perimeters(new_slices, &fill_surfaces);
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// assign fill_surfaces to each layer
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if (!fill_surfaces.surfaces.empty()) {
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for (LayerRegionPtrs::iterator l = layerms.begin(); l != layerms.end(); ++l) {
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// Separate the fill surfaces.
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ExPolygons expp = intersection_ex(to_polygons(fill_surfaces), (*l)->slices);
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(*l)->fill_expolygons = expp;
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(*l)->fill_surfaces.set(std::move(expp), fill_surfaces.surfaces.front());
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}
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}
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}
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}
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BOOST_LOG_TRIVIAL(trace) << "Generating perimeters for layer " << this->id() << " - Done";
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}
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void Layer::export_region_slices_to_svg(const char *path) const
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{
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BoundingBox bbox;
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for (const auto *region : m_regions)
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for (const auto &surface : region->slices.surfaces)
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bbox.merge(get_extents(surface.expolygon));
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Point legend_size = export_surface_type_legend_to_svg_box_size();
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Point legend_pos(bbox.min(0), bbox.max(1));
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bbox.merge(Point(std::max(bbox.min(0) + legend_size(0), bbox.max(0)), bbox.max(1) + legend_size(1)));
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SVG svg(path, bbox);
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const float transparency = 0.5f;
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for (const auto *region : m_regions)
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for (const auto &surface : region->slices.surfaces)
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svg.draw(surface.expolygon, surface_type_to_color_name(surface.surface_type), transparency);
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export_surface_type_legend_to_svg(svg, legend_pos);
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svg.Close();
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}
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// Export to "out/LayerRegion-name-%d.svg" with an increasing index with every export.
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void Layer::export_region_slices_to_svg_debug(const char *name) const
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{
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static size_t idx = 0;
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this->export_region_slices_to_svg(debug_out_path("Layer-slices-%s-%d.svg", name, idx ++).c_str());
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}
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void Layer::export_region_fill_surfaces_to_svg(const char *path) const
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{
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BoundingBox bbox;
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for (const auto *region : m_regions)
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for (const auto &surface : region->slices.surfaces)
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bbox.merge(get_extents(surface.expolygon));
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Point legend_size = export_surface_type_legend_to_svg_box_size();
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Point legend_pos(bbox.min(0), bbox.max(1));
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bbox.merge(Point(std::max(bbox.min(0) + legend_size(0), bbox.max(0)), bbox.max(1) + legend_size(1)));
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SVG svg(path, bbox);
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const float transparency = 0.5f;
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for (const auto *region : m_regions)
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for (const auto &surface : region->slices.surfaces)
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svg.draw(surface.expolygon, surface_type_to_color_name(surface.surface_type), transparency);
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export_surface_type_legend_to_svg(svg, legend_pos);
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svg.Close();
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}
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// Export to "out/LayerRegion-name-%d.svg" with an increasing index with every export.
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void Layer::export_region_fill_surfaces_to_svg_debug(const char *name) const
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{
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static size_t idx = 0;
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this->export_region_fill_surfaces_to_svg(debug_out_path("Layer-fill_surfaces-%s-%d.svg", name, idx ++).c_str());
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}
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}
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