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ENH: improve archor of internal bridge

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Add loop inside sparse infill of lower layer
to provide archor for internal bridge.

This option controls how many lower layers generate
loop path.

Signed-off-by: salt.wei <salt.wei@bambulab.com>
Change-Id: Ifdb6db9090115732aa2cacf5d155b587a10e18fc
(cherry picked from commit 4fdb87ecd5c2e680f6bad2d018ba39cd05f787ce)
This commit is contained in:
salt.wei 2022-11-15 20:20:48 +08:00 • committed by Lane.Wei
parent 08494b5f6f
commit 588f18ac58
18 changed files with 141 additions and 15 deletions
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40
src/libslic3r/PrintObject.cpp
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@ -770,7 +770,9 @@ bool PrintObject::invalidate_state_by_config_options(
|| opt_key == "solid_infill_filament"
|| opt_key == "sparse_infill_line_width"
|| opt_key == "ensure_vertical_shell_thickness"
|| opt_key == "bridge_angle") {
|| opt_key == "bridge_angle"
//BBS
|| opt_key == "internal_bridge_support_thickness") {
steps.emplace_back(posPrepareInfill);
} else if (
opt_key == "top_surface_pattern"
@ -1611,6 +1613,7 @@ void PrintObject::bridge_over_infill()
Layer *layer = *layer_it;
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);
@ -1678,8 +1681,43 @@ void PrintObject::bridge_over_infill()
(layerm->fill_surfaces.surfaces.end() - 1)->bridge_angle = ibd.angle;
}
}
for (ExPolygon &ex : not_to_bridge)
layerm->fill_surfaces.surfaces.push_back(Surface(stInternalSolid, ex));
//BBS: modify stInternal to be stInternalWithLoop to give better support to internal bridge
if (!to_bridge.empty()){
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) {
const Layer* lower_layer = m_layers[i];
if (lower_layer->print_z < bottom_z) break;
for (LayerRegion* lower_layerm : lower_layer->m_regions) {
Polygons lower_internal;
lower_layerm->fill_surfaces.filter_by_type(stInternal, &lower_internal);
ExPolygons internal_with_loop = intersection_ex(lower_internal, to_bridge);
ExPolygons internal = diff_ex(lower_internal, to_bridge);
if (internal_with_loop.empty()) {
//BBS: don't need to do anything
}
else if (internal.empty()) {
lower_layerm->fill_surfaces.change_to_new_type(stInternal, stInternalWithLoop);
}
else {
lower_layerm->fill_surfaces.remove_type(stInternal);
for (ExPolygon& ex : internal_with_loop)
lower_layerm->fill_surfaces.surfaces.push_back(Surface(stInternalWithLoop, ex));
for (ExPolygon& ex : internal)
lower_layerm->fill_surfaces.surfaces.push_back(Surface(stInternal, ex));
}
}
}
}
/*
# exclude infill from the layers below if needed
# see discussion at https://github.com/alexrj/Slic3r/issues/240