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#include "Layer.hpp"
#include "ClipperUtils.hpp"
#include "Print.hpp"
#include "Fill/Fill.hpp"
#include "ShortestPath.hpp"
#include "SVG.hpp"
#include "BoundingBox.hpp"
#include <boost/log/trivial.hpp>
namespace Slic3r {
Layer::~Layer()
{
this->lower_layer = this->upper_layer = nullptr;
for (LayerRegion *region : m_regions)
delete region;
m_regions.clear();
}
// Test whether whether there are any slices assigned to this layer.
bool Layer::empty() const
{
for (const LayerRegion *layerm : m_regions)
if (layerm != nullptr && ! layerm->slices.empty())
// Non empty layer.
return false;
return true;
}
LayerRegion* Layer::add_region(const PrintRegion *print_region)
{
m_regions.emplace_back(new LayerRegion(this, print_region));
return m_regions.back();
}
// merge all regions' slices to get islands
void Layer::make_slices()
{
ExPolygons slices;
if (m_regions.size() == 1) {
// optimization: if we only have one region, take its slices
slices = to_expolygons(m_regions.front()->slices.surfaces);
} else {
Polygons slices_p;
for (LayerRegion *layerm : m_regions)
polygons_append(slices_p, to_polygons(layerm->slices.surfaces));
slices = union_safety_offset_ex(slices_p);
}
this->lslices.clear();
this->lslices.reserve(slices.size());
// prepare ordering points
Points ordering_points;
ordering_points.reserve(slices.size());
for (const ExPolygon &ex : slices)
ordering_points.push_back(ex.contour.first_point());
// sort slices
std::vector<Points::size_type> order = chain_points(ordering_points);
// populate slices vector
for (size_t i : order)
this->lslices.emplace_back(std::move(slices[i]));
}
static inline bool layer_needs_raw_backup(const Layer *layer)
{
return ! (layer->regions().size() == 1 && (layer->id() > 0 || layer->object()->config().elefant_foot_compensation.value == 0));
}
void Layer::backup_untyped_slices()
{
if (layer_needs_raw_backup(this)) {
for (LayerRegion *layerm : m_regions)
layerm->raw_slices = to_expolygons(layerm->slices.surfaces);
} else {
assert(m_regions.size() == 1);
m_regions.front()->raw_slices.clear();
}
}
void Layer::restore_untyped_slices()
{
if (layer_needs_raw_backup(this)) {
for (LayerRegion *layerm : m_regions)
layerm->slices.set(layerm->raw_slices, stInternal);
} else {
assert(m_regions.size() == 1);
m_regions.front()->slices.set(this->lslices, stInternal);
}
}
// Similar to Layer::restore_untyped_slices()
// To improve robustness of detect_surfaces_type() when reslicing (working with typed slices), see GH issue #7442.
// Only resetting layerm->slices if Slice::extra_perimeters is always zero or it will not be used anymore
// after the perimeter generator.
void Layer::restore_untyped_slices_no_extra_perimeters()
{
if (layer_needs_raw_backup(this)) {
for (LayerRegion *layerm : m_regions)
if (! layerm->region().config().extra_perimeters.value)
layerm->slices.set(layerm->raw_slices, stInternal);
} else {
assert(m_regions.size() == 1);
LayerRegion *layerm = m_regions.front();
// This optimization is correct, as extra_perimeters are only reused by prepare_infill() with multi-regions.
//if (! layerm->region().config().extra_perimeters.value)
layerm->slices.set(this->lslices, stInternal);
}
}
ExPolygons Layer::merged(float offset_scaled) const
{
assert(offset_scaled >= 0.f);
// If no offset is set, apply EPSILON offset before union, and revert it afterwards.
float offset_scaled2 = 0;
if (offset_scaled == 0.f) {
offset_scaled = float( EPSILON);
offset_scaled2 = float(- EPSILON);
}
Polygons polygons;
for (LayerRegion *layerm : m_regions) {
const PrintRegionConfig &config = layerm->region().config();
// Our users learned to bend Slic3r to produce empty volumes to act as subtracters. Only add the region if it is non-empty.
if (config.bottom_solid_layers > 0 || config.top_solid_layers > 0 || config.fill_density > 0. || config.perimeters > 0)
append(polygons, offset(layerm->slices.surfaces, offset_scaled));
}
ExPolygons out = union_ex(polygons);
if (offset_scaled2 != 0.f)
out = offset_ex(out, offset_scaled2);
return out;
}
// Here the perimeters are created cummulatively for all layer regions sharing the same parameters influencing the perimeters.
// The perimeter paths and the thin fills (ExtrusionEntityCollection) are assigned to the first compatible layer region.
// The resulting fill surface is split back among the originating regions.
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);
for (LayerRegionPtrs::iterator layerm = m_regions.begin(); layerm != m_regions.end(); ++ layerm)
if ((*layerm)->slices.empty()) {
(*layerm)->perimeters.clear();
(*layerm)->fills.clear();
(*layerm)->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
LayerRegionPtrs layerms;
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->perimeters.clear();
other_layerm->fills.clear();
other_layerm->thin_fills.clear();
layerms.push_back(other_layerm);
done[it - m_regions.begin()] = true;
}
}
if (layerms.size() == 1) { // optimization
(*layerm)->fill_surfaces.surfaces.clear();
(*layerm)->make_perimeters((*layerm)->slices, &(*layerm)->fill_surfaces);
(*layerm)->fill_expolygons = to_expolygons((*layerm)->fill_surfaces.surfaces);
} 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.surfaces)
slices[surface.extra_perimeters].emplace_back(surface);
if (layerm->region().config().fill_density > layerm_config->region().config().fill_density)
layerm_config = layerm;
}
// 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
SurfaceCollection fill_surfaces;
layerm_config->make_perimeters(new_slices, &fill_surfaces);
// assign fill_surfaces to each layer
if (!fill_surfaces.surfaces.empty()) {
for (LayerRegionPtrs::iterator l = layerms.begin(); l != layerms.end(); ++l) {
// Separate the fill surfaces.
ExPolygons expp = intersection_ex(fill_surfaces.surfaces, (*l)->slices.surfaces);
(*l)->fill_expolygons = expp;
(*l)->fill_surfaces.set(std::move(expp), fill_surfaces.surfaces.front());
}
}
}
}
BOOST_LOG_TRIVIAL(trace) << "Generating perimeters for layer " << this->id() << " - Done";
}
void Layer::export_region_slices_to_svg(const char *path) const
{
BoundingBox bbox;
for (const auto *region : m_regions)
for (const auto &surface : region->slices.surfaces)
bbox.merge(get_extents(surface.expolygon));
Point legend_size = export_surface_type_legend_to_svg_box_size();
Point legend_pos(bbox.min(0), bbox.max(1));
bbox.merge(Point(std::max(bbox.min(0) + legend_size(0), bbox.max(0)), bbox.max(1) + legend_size(1)));
SVG svg(path, bbox);
const float transparency = 0.5f;
for (const auto *region : m_regions)
for (const auto &surface : region->slices.surfaces)
svg.draw(surface.expolygon, surface_type_to_color_name(surface.surface_type), transparency);
export_surface_type_legend_to_svg(svg, legend_pos);
svg.Close();
}
// Export to "out/LayerRegion-name-%d.svg" with an increasing index with every export.
void Layer::export_region_slices_to_svg_debug(const char *name) const
{
static size_t idx = 0;
this->export_region_slices_to_svg(debug_out_path("Layer-slices-%s-%d.svg", name, idx ++).c_str());
}
void Layer::export_region_fill_surfaces_to_svg(const char *path) const
{
BoundingBox bbox;
for (const auto *region : m_regions)
for (const auto &surface : region->slices.surfaces)
bbox.merge(get_extents(surface.expolygon));
Point legend_size = export_surface_type_legend_to_svg_box_size();
Point legend_pos(bbox.min(0), bbox.max(1));
bbox.merge(Point(std::max(bbox.min(0) + legend_size(0), bbox.max(0)), bbox.max(1) + legend_size(1)));
SVG svg(path, bbox);
const float transparency = 0.5f;
for (const auto *region : m_regions)
for (const auto &surface : region->slices.surfaces)
svg.draw(surface.expolygon, surface_type_to_color_name(surface.surface_type), transparency);
export_surface_type_legend_to_svg(svg, legend_pos);
svg.Close();
}
// Export to "out/LayerRegion-name-%d.svg" with an increasing index with every export.
void Layer::export_region_fill_surfaces_to_svg_debug(const char *name) const
{
static size_t idx = 0;
this->export_region_fill_surfaces_to_svg(debug_out_path("Layer-fill_surfaces-%s-%d.svg", name, idx ++).c_str());
}
BoundingBox get_extents(const LayerRegion &layer_region)
{
BoundingBox bbox;
if (!layer_region.slices.surfaces.empty()) {
bbox = get_extents(layer_region.slices.surfaces.front());
for (auto it = layer_region.slices.surfaces.cbegin() + 1; it != layer_region.slices.surfaces.cend(); ++it)
bbox.merge(get_extents(*it));
}
return bbox;
}
BoundingBox get_extents(const LayerRegionPtrs &layer_regions)
{
BoundingBox bbox;
if (!layer_regions.empty()) {
bbox = get_extents(*layer_regions.front());
for (auto it = layer_regions.begin() + 1; it != layer_regions.end(); ++it)
bbox.merge(get_extents(**it));
}
return bbox;
}
}
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