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ENH: improve tree supports

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1. speedup organic tree support by using parallel for intersection of bed area
jira: STUDIO-8451
2. add extra wall for hybrid tree support's tall branches
3. disable circle fitting for tree support. This feature produces inconsistent
   circles for tree supports.
4. expose the option tree_support_branch_diameter_angle. Tree supports'
   strength can be improved by increasing this value.

Change-Id: If3688ca895df98a77f6ca538077daf8fe94e53f1
(cherry picked from commit 7697eb3dc8f87204d28e6be9adaf55dfcdadbc74)
This commit is contained in:
Arthur 2024-10-15 14:48:31 +08:00 • committed by Noisyfox
parent 07c7e2f910
commit 1c686b3c04
9 changed files with 49 additions and 108 deletions
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89
src/libslic3r/PrintObject.cpp
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@ -733,7 +733,8 @@ void PrintObject::simplify_extrusion_path()
}
if (this->set_started(posSimplifySupportPath)) {
//BBS: share same progress
//BBS: disable circle simplification for support as it causes separation of support walls
#if 0
m_print->set_status(75, L("Optimizing toolpath"));
BOOST_LOG_TRIVIAL(debug) << "Simplify extrusion path of support in parallel - start";
tbb::parallel_for(
@ -747,6 +748,7 @@ void PrintObject::simplify_extrusion_path()
);
m_print->throw_if_canceled();
BOOST_LOG_TRIVIAL(debug) << "Simplify extrusion path of support in parallel - end";
#endif
this->set_done(posSimplifySupportPath);
}
}
@ -3680,91 +3682,8 @@ template void PrintObject::remove_bridges_from_contacts<Polygons>(
SupportNecessaryType PrintObject::is_support_necessary()
{
static const double super_overhang_area_threshold = SQ(scale_(5.0));
const double cantilevel_dist_thresh = scale_(6);
#if 0
double threshold_rad = (m_config.support_threshold_angle.value < EPSILON ? 30 : m_config.support_threshold_angle.value + 1) * M_PI / 180.;
int enforce_support_layers = m_config.enforce_support_layers;
// not fixing in extrusion width % PR b/c never called
const coordf_t extrusion_width = m_config.line_width.value;
const coordf_t extrusion_width_scaled = scale_(extrusion_width);
float max_bridge_length = scale_(m_config.max_bridge_length.value);
const bool bridge_no_support = max_bridge_length > 0;// config.bridge_no_support.value;
for (size_t layer_nr = enforce_support_layers + 1; layer_nr < this->layer_count(); layer_nr++) {
Layer* layer = m_layers[layer_nr];
Layer* lower_layer = layer->lower_layer;
coordf_t support_offset_scaled = extrusion_width_scaled * 0.9;
ExPolygons lower_layer_offseted = offset_ex(lower_layer->lslices, support_offset_scaled, SUPPORT_SURFACES_OFFSET_PARAMETERS);
// 1. check sharp tail
for (const LayerRegion* layerm : layer->regions()) {
for (const ExPolygon& expoly : layerm->raw_slices) {
// detect sharp tail
if (intersection_ex({ expoly }, lower_layer_offseted).empty())
return SharpTail;
}
}
// 2. check overhang area
ExPolygons super_overhang_expolys = std::move(diff_ex(layer->lslices, lower_layer_offseted));
super_overhang_expolys.erase(std::remove_if(
super_overhang_expolys.begin(),
super_overhang_expolys.end(),
[extrusion_width_scaled](ExPolygon& area) {
return offset_ex(area, -0.1 * extrusion_width_scaled).empty();
}),
super_overhang_expolys.end());
// remove bridge
if (bridge_no_support)
remove_bridges_from_contacts(lower_layer, layer, extrusion_width_scaled, &super_overhang_expolys, max_bridge_length);
Polygons super_overhang_polys = to_polygons(super_overhang_expolys);
super_overhang_polys.erase(std::remove_if(
super_overhang_polys.begin(),
super_overhang_polys.end(),
[extrusion_width_scaled](Polygon& area) {
return offset_ex(area, -0.1 * extrusion_width_scaled).empty();
}),
super_overhang_polys.end());
double super_overhang_area = 0.0;
for (Polygon& poly : super_overhang_polys) {
bool is_ccw = poly.is_counter_clockwise();
double area_ = poly.area();
if (is_ccw) {
if (area_ > super_overhang_area_threshold)
return LargeOverhang;
super_overhang_area += area_;
}
else {
super_overhang_area -= area_;
}
}
//if (super_overhang_area > super_overhang_area_threshold)
// return LargeOverhang;
// 3. check overhang distance
const double distance_threshold_scaled = extrusion_width_scaled * 2;
ExPolygons lower_layer_offseted_2 = offset_ex(lower_layer->lslices, distance_threshold_scaled, SUPPORT_SURFACES_OFFSET_PARAMETERS);
ExPolygons exceed_overhang = std::move(diff_ex(super_overhang_polys, lower_layer_offseted_2));
exceed_overhang.erase(std::remove_if(
exceed_overhang.begin(),
exceed_overhang.end(),
[extrusion_width_scaled](ExPolygon& area) {
// tolerance for 1 extrusion width offset
return offset_ex(area, -0.5 * extrusion_width_scaled).empty();
}),
exceed_overhang.end());
if (!exceed_overhang.empty())
return LargeOverhang;
}
#else
TreeSupport tree_support(*this, m_slicing_params);
tree_support.support_type = SupportType::stTreeAuto; // need to set support type to fully utilize the power of feature detection
tree_support.detect_overhangs(true);
@ -3773,7 +3692,7 @@ SupportNecessaryType PrintObject::is_support_necessary()
return SharpTail;
else if (tree_support.has_cantilever && tree_support.max_cantilever_dist > cantilevel_dist_thresh)
return Cantilever;
#endif
return NoNeedSupp;
}