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Parallelized PrintObject::bridge_over_infill() (#2132)

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Co-authored-by: Vojtech Bubnik <bubnikv@gmail.com>
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Noisyfox 2023-09-17 11:22:11 +08:00 • committed by GitHub
parent bd13d83385
commit 685e058c35
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3 changed files with 70 additions and 40 deletions
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src/libslic3r/PrintObject.cpp
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@ -1728,61 +1728,70 @@ void PrintObject::discover_vertical_shells()
// PROFILE_OUTPUT(debug_out_path("discover_vertical_shells-profile.txt").c_str());
}
/* This method applies bridge flow to the first internal solid layer above
sparse infill */
// This method applies bridge flow to the first internal solid layer above sparse infill.
void PrintObject::bridge_over_infill()
{
BOOST_LOG_TRIVIAL(info) << "Bridge over infill..." << log_memory_info();
for (size_t region_id = 0; region_id < this->num_printing_regions(); ++ region_id) {
const PrintRegion &region = this->printing_region(region_id);
std::vector<int> sparse_infill_regions;
for (size_t region_id = 0; region_id < this->num_printing_regions(); ++ region_id)
if (const PrintRegion &region = this->printing_region(region_id); region.config().sparse_infill_density.value < 100)
sparse_infill_regions.emplace_back(region_id);
if (this->layer_count() < 2 || sparse_infill_regions.empty())
return;
// skip bridging in case there are no voids
if (region.config().sparse_infill_density.value == 100)
continue;
// Collect sum of all internal (sparse infill) regions, because
// 1) layerm->fill_surfaces.will be modified in parallel.
// 2) the parallel loop works on a sum of surfaces over regions anyways, thus collecting the sparse infill surfaces
// up front is an optimization.
std::vector<Polygons> internals;
internals.reserve(this->layer_count());
for (Layer *layer : m_layers) {
Polygons sum;
for (const LayerRegion *layerm : layer->m_regions)
layerm->fill_surfaces.filter_by_type(stInternal, &sum);
internals.emplace_back(std::move(sum));
}
for (LayerPtrs::iterator layer_it = m_layers.begin(); layer_it != m_layers.end(); ++ layer_it) {
// skip first layer
if (layer_it == m_layers.begin())
continue;
Layer *layer = *layer_it;
// Process all regions and layers in parallel.
tbb::parallel_for(tbb::blocked_range<size_t>(0, sparse_infill_regions.size() * (this->layer_count() - 1), sparse_infill_regions.size()),
[this, &sparse_infill_regions, &internals]
(const tbb::blocked_range<size_t> &range) {
for (size_t task_id = range.begin(); task_id != range.end(); ++ task_id) {
const size_t layer_id = (task_id / sparse_infill_regions.size()) + 1;
const size_t region_id = sparse_infill_regions[task_id % sparse_infill_regions.size()];
Layer *layer = this->get_layer(layer_id);
LayerRegion *layerm = layer->m_regions[region_id];
const PrintObjectConfig& object_config = layer->object()->config();
//BBS: enable thick bridge for internal bridge only
Flow bridge_flow = layerm->bridging_flow(frSolidInfill, true);
// extract the stInternalSolid surfaces that might be transformed into bridges
Polygons internal_solid;
layerm->fill_surfaces.filter_by_type(stInternalSolid, &internal_solid);
// Extract the stInternalSolid surfaces that might be transformed into bridges.
ExPolygons internal_solid;
layerm->fill_surfaces.remove_type(stInternalSolid, &internal_solid);
if (internal_solid.empty())
// No internal solid -> no new bridges for this layer region.
continue;
// check whether the lower area is deep enough for absorbing the extra flow
// (for obvious physical reasons but also for preventing the bridge extrudates
// from overflowing in 3D preview)
ExPolygons to_bridge;
{
Polygons to_bridge_pp = internal_solid;
// iterate through lower layers spanned by bridge_flow
Polygons to_bridge_pp = to_polygons(internal_solid);
// Iterate through lower layers spanned by bridge_flow.
double bottom_z = layer->print_z - bridge_flow.height() - EPSILON;
for (int i = int(layer_it - m_layers.begin()) - 1; i >= 0; --i) {
const Layer* lower_layer = m_layers[i];
// stop iterating if layer is lower than bottom_z
if (lower_layer->print_z < bottom_z) break;
// iterate through regions and collect internal surfaces
Polygons lower_internal;
for (LayerRegion *lower_layerm : lower_layer->m_regions)
lower_layerm->fill_surfaces.filter_by_type(stInternal, &lower_internal);
// intersect such lower internal surfaces with the candidate solid surfaces
to_bridge_pp = intersection(to_bridge_pp, lower_internal);
for (auto i = int(layer_id) - 1; i >= 0; -- i) {
// Stop iterating if layer is lower than bottom_z.
if (m_layers[i]->print_z < bottom_z)
break;
// Intersect lower sparse infills with the candidate solid surfaces.
to_bridge_pp = intersection(to_bridge_pp, internals[i]);
}
// BBS: expand to make avoid gap between bridge and inner wall
to_bridge_pp = expand(to_bridge_pp, bridge_flow.scaled_width());
to_bridge_pp = intersection(to_bridge_pp, internal_solid);
to_bridge_pp = intersection(to_bridge_pp, to_polygons(internal_solid));
// there's no point in bridging too thin/short regions
//FIXME Vojtech: The offset2 function is not a geometric offset,
@ -1793,7 +1802,12 @@ void PrintObject::bridge_over_infill()
to_bridge_pp = opening(to_bridge_pp, min_width);
}
if (to_bridge_pp.empty()) continue;
if (to_bridge_pp.empty()) {
// Restore internal_solid surfaces.
for (ExPolygon &ex : internal_solid)
layerm->fill_surfaces.surfaces.push_back(Surface(stInternalSolid, std::move(ex)));
continue;
}
// convert into ExPolygons
to_bridge = union_ex(to_bridge_pp);
@ -1807,7 +1821,6 @@ void PrintObject::bridge_over_infill()
ExPolygons not_to_bridge = diff_ex(internal_solid, to_bridge, ApplySafetyOffset::Yes);
to_bridge = intersection_ex(to_bridge, internal_solid, ApplySafetyOffset::Yes);
// build the new collection of fill_surfaces
layerm->fill_surfaces.remove_type(stInternalSolid);
for (ExPolygon &ex : to_bridge) {
layerm->fill_surfaces.surfaces.push_back(Surface(stInternalBridge, ex));
// BBS: detect angle for internal bridge infill
@ -1825,8 +1838,8 @@ void PrintObject::bridge_over_infill()
float internal_loop_thickness = object_config.internal_bridge_support_thickness.value;
double bottom_z = layer->print_z - layer->height - internal_loop_thickness + EPSILON;
//BBS: lighting infill doesn't support this feature. Don't need to add loop when infill density is high than 50%
if (region.config().sparse_infill_pattern != InfillPattern::ipLightning && region.config().sparse_infill_density.value < 50)
for (int i = int(layer_it - m_layers.begin()) - 1; i >= 0; --i) {
if (layerm->region().config().sparse_infill_pattern != InfillPattern::ipLightning && layerm->region().config().sparse_infill_density.value < 50)
for (int i = layer_id - 1; i >= 0; --i) {
const Layer* lower_layer = m_layers[i];
if (lower_layer->print_z < bottom_z) break;
@ -1893,7 +1906,7 @@ void PrintObject::bridge_over_infill()
#endif /* SLIC3R_DEBUG_SLICE_PROCESSING */
m_print->throw_if_canceled();
}
}
});
}
static void clamp_exturder_to_default(ConfigOptionInt &opt, size_t num_extruders)