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FDM Supports: Refactoring for efficiency

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This commit is contained in:
Vojtech Bubnik 2021-02-12 14:36:25 +01:00
parent a342f3de1a
commit 0e6cc030ca
2 changed files with 84 additions and 87 deletions
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162
src/libslic3r/SupportMaterial.cpp
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@ -291,7 +291,7 @@ void PrintObjectSupportMaterial::generate(PrintObject &object)
BOOST_LOG_TRIVIAL(info) << "Support generator - Creating base layers"; BOOST_LOG_TRIVIAL(info) << "Support generator - Creating base layers";
// Fill in intermediate layers between the top / bottom support contact layers, trimm them by the object. // Fill in intermediate layers between the top / bottom support contact layers, trim them by the object.
this->generate_base_layers(object, bottom_contacts, top_contacts, intermediate_layers, layer_support_areas); this->generate_base_layers(object, bottom_contacts, top_contacts, intermediate_layers, layer_support_areas);
#ifdef SLIC3R_DEBUG #ifdef SLIC3R_DEBUG
@ -315,15 +315,7 @@ void PrintObjectSupportMaterial::generate(PrintObject &object)
// Propagate top / bottom contact layers to generate interface layers. // Propagate top / bottom contact layers to generate interface layers.
// In a first step generate normal interfaces with number_base_interface_layers = zero, // In a first step generate normal interfaces with number_base_interface_layers = zero,
// since generation of those layers is depends on remaining intersection area of intermediate layers. // since generation of those layers is depends on remaining intersection area of intermediate layers.
MyLayersPtr interface_layers = this->generate_interface_layers( auto [interface_layers, base_interface_layers] = this->generate_interface_layers(bottom_contacts, top_contacts, intermediate_layers, layer_storage);
bottom_contacts, top_contacts, intermediate_layers, 0, layer_storage);
BOOST_LOG_TRIVIAL(info) << "Support generator - Creating base interfaces";
// Propagate top / bottom contact layers to generate base interface layers in second step.
MyLayersPtr base_interface_layers = this->generate_interface_layers(
bottom_contacts, top_contacts, intermediate_layers, 2, layer_storage);
BOOST_LOG_TRIVIAL(info) << "Support generator - Creating raft"; BOOST_LOG_TRIVIAL(info) << "Support generator - Creating raft";
@ -333,18 +325,15 @@ void PrintObjectSupportMaterial::generate(PrintObject &object)
MyLayersPtr raft_layers = this->generate_raft_base(top_contacts, interface_layers, intermediate_layers, layer_storage); MyLayersPtr raft_layers = this->generate_raft_base(top_contacts, interface_layers, intermediate_layers, layer_storage);
#ifdef SLIC3R_DEBUG #ifdef SLIC3R_DEBUG
for (MyLayersPtr::const_iterator it = interface_layers.begin(); it != interface_layers.end(); ++ it) for (const MyLayer *l : interface_layers)
Slic3r::SVG::export_expolygons( Slic3r::SVG::export_expolygons(
debug_out_path("support-interface-layers-%d-%lf.svg", iRun, (*it)->print_z), debug_out_path("support-interface-layers-%d-%lf.svg", iRun, l->print_z),
union_ex((*it)->polygons, false)); union_ex(l->polygons, false));
#endif /* SLIC3R_DEBUG */ for (const MyLayer *l : base_interface_layers)
#ifdef SLIC3R_DEBUG
for (MyLayersPtr::const_iterator it = base_interface_layers.begin(); it != base_interface_layers.end(); ++ it)
Slic3r::SVG::export_expolygons( Slic3r::SVG::export_expolygons(
debug_out_path("support-base-interface-layers-%d-%lf.svg", iRun, (*it)->print_z), debug_out_path("support-base-interface-layers-%d-%lf.svg", iRun, l->print_z),
union_ex((*it)->polygons, false)); union_ex(l->polygons, false));
#endif /* SLIC3R_DEBUG */ #endif // SLIC3R_DEBUG
/* /*
// Clip with the pillars. // Clip with the pillars.
@ -367,7 +356,6 @@ void PrintObjectSupportMaterial::generate(PrintObject &object)
// A support layer installed on a PrintObject has a unique print_z. // A support layer installed on a PrintObject has a unique print_z.
MyLayersPtr layers_sorted; MyLayersPtr layers_sorted;
layers_sorted.reserve(raft_layers.size() + bottom_contacts.size() + top_contacts.size() + intermediate_layers.size() + interface_layers.size() + base_interface_layers.size()); layers_sorted.reserve(raft_layers.size() + bottom_contacts.size() + top_contacts.size() + intermediate_layers.size() + interface_layers.size() + base_interface_layers.size());
//layers_sorted.reserve(raft_layers.size() + bottom_contacts.size() + top_contacts.size() + intermediate_layers.size() + interface_layers.size());
layers_append(layers_sorted, raft_layers); layers_append(layers_sorted, raft_layers);
layers_append(layers_sorted, bottom_contacts); layers_append(layers_sorted, bottom_contacts);
layers_append(layers_sorted, top_contacts); layers_append(layers_sorted, top_contacts);
@ -407,7 +395,6 @@ void PrintObjectSupportMaterial::generate(PrintObject &object)
// Generate the actual toolpaths and save them into each layer. // Generate the actual toolpaths and save them into each layer.
this->generate_toolpaths(object.support_layers(), raft_layers, bottom_contacts, top_contacts, intermediate_layers, interface_layers, base_interface_layers); this->generate_toolpaths(object.support_layers(), raft_layers, bottom_contacts, top_contacts, intermediate_layers, interface_layers, base_interface_layers);
//this->generate_toolpaths(object, raft_layers, bottom_contacts, top_contacts, intermediate_layers, interface_layers);
#ifdef SLIC3R_DEBUG #ifdef SLIC3R_DEBUG
{ {
@ -1600,7 +1587,7 @@ PrintObjectSupportMaterial::MyLayersPtr PrintObjectSupportMaterial::bottom_conta
}); });
Polygons &layer_support_area = layer_support_areas[layer_id]; Polygons &layer_support_area = layer_support_areas[layer_id];
task_group.run([this, &projection, &projection_raw, &layer, &layer_support_area, layer_id] { task_group.run([this, &projection, &projection_raw, &layer, &layer_support_area] {
// Remove the areas that touched from the projection that will continue on next, lower, top surfaces. // Remove the areas that touched from the projection that will continue on next, lower, top surfaces.
// Polygons trimming = union_(to_polygons(layer.slices), touching, true); // Polygons trimming = union_(to_polygons(layer.slices), touching, true);
Polygons trimming = offset(layer.lslices, float(SCALED_EPSILON)); Polygons trimming = offset(layer.lslices, float(SCALED_EPSILON));
@ -1754,7 +1741,7 @@ void PrintObjectSupportMaterial::trim_top_contacts_by_bottom_contacts(
const PrintObject &object, const MyLayersPtr &bottom_contacts, MyLayersPtr &top_contacts) const const PrintObject &object, const MyLayersPtr &bottom_contacts, MyLayersPtr &top_contacts) const
{ {
tbb::parallel_for(tbb::blocked_range<int>(0, int(top_contacts.size())), tbb::parallel_for(tbb::blocked_range<int>(0, int(top_contacts.size())),
[&object, &bottom_contacts, &top_contacts](const tbb::blocked_range<int>& range) { [&bottom_contacts, &top_contacts](const tbb::blocked_range<int>& range) {
int idx_bottom_overlapping_first = -2; int idx_bottom_overlapping_first = -2;
// For all top contact layers, counting downwards due to the way idx_higher_or_equal caches the last index to avoid repeated binary search. // For all top contact layers, counting downwards due to the way idx_higher_or_equal caches the last index to avoid repeated binary search.
for (int idx_top = range.end() - 1; idx_top >= range.begin(); -- idx_top) { for (int idx_top = range.end() - 1; idx_top >= range.begin(); -- idx_top) {
@ -2269,96 +2256,112 @@ PrintObjectSupportMaterial::MyLayersPtr PrintObjectSupportMaterial::generate_raf
} }
// Convert some of the intermediate layers into top/bottom interface layers as well as base interface layers. // Convert some of the intermediate layers into top/bottom interface layers as well as base interface layers.
PrintObjectSupportMaterial::MyLayersPtr PrintObjectSupportMaterial::generate_interface_layers( std::pair<PrintObjectSupportMaterial::MyLayersPtr, PrintObjectSupportMaterial::MyLayersPtr> PrintObjectSupportMaterial::generate_interface_layers(
const MyLayersPtr &bottom_contacts, const MyLayersPtr &bottom_contacts,
const MyLayersPtr &top_contacts, const MyLayersPtr &top_contacts,
MyLayersPtr &intermediate_layers, MyLayersPtr &intermediate_layers,
size_t number_base_interface_layers,
MyLayerStorage &layer_storage) const MyLayerStorage &layer_storage) const
{ {
// my $area_threshold = $self->interface_flow->scaled_spacing ** 2; // my $area_threshold = $self->interface_flow->scaled_spacing ** 2;
MyLayersPtr interface_layers; std::pair<MyLayersPtr, MyLayersPtr> base_and_interface_layers;
MyLayersPtr &interface_layers = base_and_interface_layers.first;
MyLayersPtr &base_interface_layers = base_and_interface_layers.second;
// distinguish between interface and base interface layers // distinguish between interface and base interface layers
// Contact layer is considered an interface layer, therefore run the following block only if support_material_interface_layers > 1. // Contact layer is considered an interface layer, therefore run the following block only if support_material_interface_layers > 1.
// Contact layer needs a base_interface layer, therefore run the following block if support_material_interface_layers > 0, has soluble support and extruders are different. // Contact layer needs a base_interface layer, therefore run the following block if support_material_interface_layers > 0, has soluble support and extruders are different.
bool has_interface_layers = m_object_config->support_material_interface_layers.value > 1; bool soluble_interface_non_soluble_base =
if(number_base_interface_layers > 0) // Zero z-gap between the overhangs and the support interface.
has_interface_layers = m_object_config->support_material_interface_layers.value > 0 && m_slicing_params.soluble_interface m_slicing_params.soluble_interface &&
&& m_object_config->support_material_interface_extruder.value != m_object_config->support_material_extruder.value; // Interface extruder soluble.
m_print_config->filament_soluble.get_at(m_object_config->support_material_interface_extruder.value - 1) &&
// Base extruder not soluble.
! m_print_config->filament_soluble.get_at(m_object_config->support_material_extruder.value - 1);
size_t num_interface_layers = m_object_config->support_material_interface_layers.value;
size_t num_base_interface_layers = soluble_interface_non_soluble_base ? std::max(num_interface_layers / 2, size_t(2)) : 0;
if (! intermediate_layers.empty() && has_interface_layers) { if (! intermediate_layers.empty() && num_interface_layers > 1) {
// For all intermediate layers, collect top contact surfaces, which are not further than support_material_interface_layers. // For all intermediate layers, collect top contact surfaces, which are not further than support_material_interface_layers.
BOOST_LOG_TRIVIAL(debug) << "PrintObjectSupportMaterial::generate_interface_layers() in parallel - start"; BOOST_LOG_TRIVIAL(debug) << "PrintObjectSupportMaterial::generate_interface_layers() in parallel - start";
// Since the intermediate layer index starts at zero the number of interface layer needs to be reduced by 1.
-- num_interface_layers;
interface_layers.assign(intermediate_layers.size(), nullptr); interface_layers.assign(intermediate_layers.size(), nullptr);
if (num_base_interface_layers)
base_interface_layers.assign(intermediate_layers.size(), nullptr);
tbb::spin_mutex layer_storage_mutex; tbb::spin_mutex layer_storage_mutex;
// Insert a new layer into base_interface_layers, if intersection with base exists.
auto insert_layer = [&layer_storage, &layer_storage_mutex](MyLayer &intermediate_layer, Polygons &bottom, Polygons &&top, const Polygons *subtract, SupporLayerType type) {
assert(! bottom.empty() || ! top.empty());
MyLayer &layer_new = layer_allocate(layer_storage, layer_storage_mutex, type);
layer_new.print_z = intermediate_layer.print_z;
layer_new.bottom_z = intermediate_layer.bottom_z;
layer_new.height = intermediate_layer.height;
layer_new.bridging = intermediate_layer.bridging;
// Merge top into bottom, unite them with a safety offset.
append(bottom, std::move(top));
layer_new.polygons = union_(std::move(bottom), true);
// Subtract the interface from the base regions.
intermediate_layer.polygons = diff(intermediate_layer.polygons, layer_new.polygons, false);
if (subtract)
// Trim the base interface layer with the interface layer.
layer_new.polygons = diff(std::move(layer_new.polygons), *subtract);
//FIXME filter layer_new.polygons islands by a minimum area?
// $interface_area = [ grep abs($_->area) >= $area_threshold, @$interface_area ];
return &layer_new;
};
tbb::parallel_for(tbb::blocked_range<size_t>(0, intermediate_layers.size()), tbb::parallel_for(tbb::blocked_range<size_t>(0, intermediate_layers.size()),
[this, &bottom_contacts, &top_contacts, &intermediate_layers, &layer_storage, number_base_interface_layers, &layer_storage_mutex, &interface_layers](const tbb::blocked_range<size_t>& range) { [this, &bottom_contacts, &top_contacts, &intermediate_layers, &insert_layer, num_interface_layers, num_base_interface_layers, &interface_layers, &base_interface_layers](const tbb::blocked_range<size_t>& range) {
// gather the number of layers below/above object // gather the number of layers below/above object
// FIX The algorithm calculates top_z/bottom_z coordinates refered to the conctacts and above them polygons are projected. // FIX The algorithm calculates top_z/bottom_z coordinates refered to the conctacts and above them polygons are projected.
// Since the intermediate layer index starts at zero the number of interface layer needs to be reduced by 1.
size_t number_layers = size_t(m_object_config->support_material_interface_layers.value - 1);
if(number_base_interface_layers > 0)
number_layers = size_t(number_layers + number_base_interface_layers);
// Index of the first top contact layer intersecting the current intermediate layer. // Index of the first top contact layer intersecting the current intermediate layer.
size_t idx_top_contact_first = size_t(-1); auto idx_top_contact_first = size_t(-1);
// Index of the first bottom contact layer intersecting the current intermediate layer. // Index of the first bottom contact layer intersecting the current intermediate layer.
size_t idx_bottom_contact_first = size_t(-1); auto idx_bottom_contact_first = size_t(-1);
for (size_t idx_intermediate_layer = range.begin(); idx_intermediate_layer < range.end(); ++ idx_intermediate_layer) { for (size_t idx_intermediate_layer = range.begin(); idx_intermediate_layer < range.end(); ++ idx_intermediate_layer) {
MyLayer &intermediate_layer = *intermediate_layers[idx_intermediate_layer]; MyLayer &intermediate_layer = *intermediate_layers[idx_intermediate_layer];
// Top / bottom Z coordinate of a slab, over which we are collecting the top / bottom contact surfaces // Top / bottom Z coordinate of a slab, over which we are collecting the top / bottom contact surfaces
// Indexing is further corrected by the existing constacts, that are interface layers as well. // Indexing is further corrected by the existing contacts, that are interface layers as well.
coordf_t top_z = intermediate_layers[std::min<int>(intermediate_layers.size() - 1, idx_intermediate_layer + num_interface_layers - 1)]->print_z;
coordf_t top_z = intermediate_layers[std::min<int>(intermediate_layers.size()-1, idx_intermediate_layer + number_layers -1)]->print_z; coordf_t top_inteface_z = intermediate_layers[std::min<int>(intermediate_layers.size() - 1, idx_intermediate_layer + num_base_interface_layers - 1)]->print_z;
coordf_t bottom_z = intermediate_layers[std::max<int>(0, int(idx_intermediate_layer) - int(number_layers) + 1)]->bottom_z; coordf_t bottom_z = intermediate_layers[std::max<int>(0, int(idx_intermediate_layer) - int(num_interface_layers) + 1)]->bottom_z;
coordf_t bottom_interface_z = intermediate_layers[std::max<int>(0, int(idx_intermediate_layer) - int(num_base_interface_layers) + 1)]->bottom_z;
// Move idx_top_contact_first up until above the current print_z. // Move idx_top_contact_first up until above the current print_z.
// FIX Avoid aditional excess layers (make it mirrow symmetric to the bottonm coding) idx_top_contact_first = idx_higher_or_equal(top_contacts, idx_top_contact_first, [&intermediate_layer](const MyLayer *layer){ return layer->print_z >= intermediate_layer.print_z; }); // - EPSILON
// idx_top_contact_first = idx_higher_or_equal(top_contacts, idx_top_contact_first, [&intermediate_layer](const MyLayer *layer){ return layer->print_z >= intermediate_layer.print_z; }); // - EPSILON
idx_top_contact_first = idx_higher_or_equal(top_contacts, idx_top_contact_first, [&intermediate_layer](const MyLayer *layer){ return layer->bottom_z >= intermediate_layer.print_z; }); // - EPSILON
// Collect the top contact areas above this intermediate layer, below top_z. // Collect the top contact areas above this intermediate layer, below top_z.
Polygons polygons_top_contact_projected; Polygons polygons_top_contact_projected_interface;
Polygons polygons_top_contact_projected_base;
for (size_t idx_top_contact = idx_top_contact_first; idx_top_contact < top_contacts.size(); ++ idx_top_contact) { for (size_t idx_top_contact = idx_top_contact_first; idx_top_contact < top_contacts.size(); ++ idx_top_contact) {
const MyLayer &top_contact_layer = *top_contacts[idx_top_contact]; const MyLayer &top_contact_layer = *top_contacts[idx_top_contact];
//FIXME maybe this adds one interface layer in excess? removed? //FIXME maybe this adds one interface layer in excess? removed?
if (top_contact_layer.bottom_z - EPSILON > top_z) if (top_contact_layer.bottom_z - EPSILON > top_z)
break; break;
polygons_append(polygons_top_contact_projected, top_contact_layer.polygons); polygons_append(top_contact_layer.bottom_z - EPSILON > top_inteface_z ? polygons_top_contact_projected_base : polygons_top_contact_projected_interface, top_contact_layer.polygons);
} }
// Move idx_bottom_contact_first up until touching bottom_z. // Move idx_bottom_contact_first up until touching bottom_z.
idx_bottom_contact_first = idx_higher_or_equal(bottom_contacts, idx_bottom_contact_first, [bottom_z](const MyLayer *layer){ return layer->print_z >= bottom_z - EPSILON; }); idx_bottom_contact_first = idx_higher_or_equal(bottom_contacts, idx_bottom_contact_first, [bottom_z](const MyLayer *layer){ return layer->print_z >= bottom_z - EPSILON; });
// Collect the top contact areas above this intermediate layer, below top_z. // Collect the top contact areas above this intermediate layer, below top_z.
Polygons polygons_bottom_contact_projected; Polygons polygons_bottom_contact_projected_interface;
Polygons polygons_bottom_contact_projected_base;
for (size_t idx_bottom_contact = idx_bottom_contact_first; idx_bottom_contact < bottom_contacts.size(); ++ idx_bottom_contact) { for (size_t idx_bottom_contact = idx_bottom_contact_first; idx_bottom_contact < bottom_contacts.size(); ++ idx_bottom_contact) {
const MyLayer &bottom_contact_layer = *bottom_contacts[idx_bottom_contact]; const MyLayer &bottom_contact_layer = *bottom_contacts[idx_bottom_contact];
if (bottom_contact_layer.print_z - EPSILON > intermediate_layer.bottom_z) if (bottom_contact_layer.print_z - EPSILON > intermediate_layer.bottom_z)
break; break;
polygons_append(polygons_bottom_contact_projected, bottom_contact_layer.polygons); polygons_append(bottom_contact_layer.print_z - EPSILON > bottom_interface_z ? polygons_bottom_contact_projected_interface : polygons_bottom_contact_projected_base, bottom_contact_layer.polygons);
} }
if (polygons_top_contact_projected.empty() && polygons_bottom_contact_projected.empty()) MyLayer *interface_layer = nullptr;
continue; if (! polygons_bottom_contact_projected_interface.empty() || ! polygons_top_contact_projected_interface.empty()) {
interface_layer = insert_layer(
polygons_append(polygons_top_contact_projected, polygons_bottom_contact_projected); intermediate_layer, polygons_bottom_contact_projected_interface, std::move(polygons_top_contact_projected_interface), nullptr,
polygons_top_contact_projected = union_(polygons_top_contact_projected, true); polygons_top_contact_projected_interface.empty() ? sltBottomInterface : sltTopInterface);
Polygons base_intersection_polys = intersection(intermediate_layer.polygons, polygons_top_contact_projected); interface_layers[idx_intermediate_layer] = interface_layer;
// Insert a new layer into base_interface_layers, if intersection with base exists.
if (! base_intersection_polys.empty()){
MyLayer &layer_new = layer_allocate(layer_storage, layer_storage_mutex,
number_base_interface_layers > 0 ? sltBase : polygons_top_contact_projected.empty() ? sltBottomInterface : sltTopInterface);
layer_new.print_z = intermediate_layer.print_z;
layer_new.bottom_z = intermediate_layer.bottom_z;
layer_new.height = intermediate_layer.height;
layer_new.bridging = intermediate_layer.bridging;
layer_new.polygons = base_intersection_polys;
interface_layers[idx_intermediate_layer] = &layer_new;
//FIXME filter layer_new.polygons islands by a minimum area?
// $interface_area = [ grep abs($_->area) >= $area_threshold, @$interface_area ];
intermediate_layer.polygons = diff(intermediate_layer.polygons, polygons_top_contact_projected, false);
} }
if (! polygons_bottom_contact_projected_base.empty() || ! polygons_top_contact_projected_base.empty())
base_interface_layers[idx_intermediate_layer] = insert_layer(
intermediate_layer, polygons_bottom_contact_projected_base, std::move(polygons_top_contact_projected_base),
interface_layer ? &interface_layer->polygons : nullptr, sltBase);
} }
}); });
@ -2367,7 +2370,7 @@ PrintObjectSupportMaterial::MyLayersPtr PrintObjectSupportMaterial::generate_int
BOOST_LOG_TRIVIAL(debug) << "PrintObjectSupportMaterial::generate_interface_layers() in parallel - start"; BOOST_LOG_TRIVIAL(debug) << "PrintObjectSupportMaterial::generate_interface_layers() in parallel - start";
} }
return interface_layers; return base_and_interface_layers;
} }
static void fill_expolygons_generate_paths( static void fill_expolygons_generate_paths(
@ -2416,13 +2419,9 @@ struct MyLayerExtruded
const Polygons& polygons_to_extrude() const { return (m_polygons_to_extrude == nullptr) ? layer->polygons : *m_polygons_to_extrude; } const Polygons& polygons_to_extrude() const { return (m_polygons_to_extrude == nullptr) ? layer->polygons : *m_polygons_to_extrude; }
bool could_merge(const MyLayerExtruded &other) const { bool could_merge(const MyLayerExtruded &other) const {
//return ! this->empty() && ! other.empty() && //FIXME Below layer ptr maybe nullptr, works only because full condition is false anyway, but ugly! return ! this->empty() && ! other.empty() &&
// std::abs(this->layer->height - other.layer->height) < EPSILON && std::abs(this->layer->height - other.layer->height) < EPSILON &&
// this->layer->bridging == other.layer->bridging; this->layer->bridging == other.layer->bridging;
//FIX
bool mergeable = ! this->empty() && ! other.empty();
if (mergeable) mergeable = std::abs(this->layer->height - other.layer->height) < EPSILON && this->layer->bridging == other.layer->bridging;
return mergeable;
} }
// Merge regions, perform boolean union over the merged polygons. // Merge regions, perform boolean union over the merged polygons.
@ -3327,9 +3326,8 @@ void PrintObjectSupportMaterial::generate_toolpaths(
} }
// Merge base_interface_layers to base_layers to avoid unneccessary retractions // Merge base_interface_layers to base_layers to avoid unneccessary retractions
if (! base_layer.empty() && ! base_layer.polygons_to_extrude().empty() if (! base_layer.polygons_to_extrude().empty() && ! base_interface_layer.polygons_to_extrude().empty() &&
&& ! base_interface_layer.empty() && ! base_interface_layer.polygons_to_extrude().empty() base_layer.could_merge(base_interface_layer))
&& base_layer.could_merge(base_interface_layer))
base_layer.merge(std::move(base_interface_layer)); base_layer.merge(std::move(base_interface_layer));
layer_cache.overlaps.reserve(5); layer_cache.overlaps.reserve(5);

3
src/libslic3r/SupportMaterial.hpp
View File

@ -205,11 +205,10 @@ private:
// Turn some of the base layers into interface layers for number_base_interface_layers == 0. // Turn some of the base layers into interface layers for number_base_interface_layers == 0.
// Create base type interface layers under soluble interfaces to extend adhesion. // Create base type interface layers under soluble interfaces to extend adhesion.
// Turn some of the base layers into base interface layers for number_base_interface_layers > 0. // Turn some of the base layers into base interface layers for number_base_interface_layers > 0.
MyLayersPtr generate_interface_layers( std::pair<MyLayersPtr, MyLayersPtr> generate_interface_layers(
const MyLayersPtr &bottom_contacts, const MyLayersPtr &bottom_contacts,
const MyLayersPtr &top_contacts, const MyLayersPtr &top_contacts,
MyLayersPtr &intermediate_layers, MyLayersPtr &intermediate_layers,
size_t number_base_interface_layers,
MyLayerStorage &layer_storage) const; MyLayerStorage &layer_storage) const;