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WIP: Refactored bridging flow from normal flow, new config value

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'thick_bridges' to switch between the Slic3r vs. S3D/Cura/Ideamaker
way of printing 1st object layer over supports.
Simplified the PresetHints.
This commit is contained in:
Vojtech Bubnik 2021-03-08 13:44:00 +01:00
parent 1569dad5de
commit ceea9de8b8
21 changed files with 228 additions and 283 deletions
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62
src/libslic3r/SupportMaterial.cpp
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@ -345,7 +345,7 @@ PrintObjectSupportMaterial::PrintObjectSupportMaterial(const PrintObject *object
for (size_t region_id = 0; region_id < object->region_volumes.size(); ++ region_id)
if (! object->region_volumes[region_id].empty())
external_perimeter_width = std::max(external_perimeter_width,
(coordf_t)object->print()->get_region(region_id)->flow(frExternalPerimeter, slicing_params.layer_height, false, false, -1, *object).width);
(coordf_t)object->print()->get_region(region_id)->flow(*object, frExternalPerimeter, slicing_params.layer_height).width());
m_gap_xy = m_object_config->support_material_xy_spacing.get_abs_value(external_perimeter_width);
m_can_merge_support_regions = m_object_config->support_material_extruder.value == m_object_config->support_material_interface_extruder.value;
@ -1231,7 +1231,7 @@ namespace SupportMaterialInternal {
// since we're dealing with bridges, we can't assume width is larger than spacing,
// so we take the largest value and also apply safety offset to be ensure no gaps
// are left in between
Flow bridge_flow = layerm->flow(frPerimeter, true);
Flow bridge_flow = layerm->bridging_flow(frPerimeter);
float w = float(std::max(bridge_flow.scaled_width(), bridge_flow.scaled_spacing()));
for (Polyline &polyline : overhang_perimeters)
if (polyline.is_straight()) {
@ -1542,16 +1542,20 @@ PrintObjectSupportMaterial::MyLayersPtr PrintObjectSupportMaterial::top_contact_
}
}
// Offset the contact polygons outside.
#if 0
for (size_t i = 0; i < NUM_MARGIN_STEPS; ++ i) {
diff_polygons = diff(
offset(
diff_polygons,
SUPPORT_MATERIAL_MARGIN / NUM_MARGIN_STEPS,
scaled<float>(SUPPORT_MATERIAL_MARGIN / NUM_MARGIN_STEPS),
ClipperLib::jtRound,
// round mitter limit
scale_(0.05)),
slices_margin_cached);
}
#else
diff_polygons = diff(diff_polygons, slices_margin_cached);
#endif
}
polygons_append(contact_polygons, diff_polygons);
} // for each layer.region
@ -1597,7 +1601,7 @@ PrintObjectSupportMaterial::MyLayersPtr PrintObjectSupportMaterial::top_contact_
// Contact layer will be printed with a normal flow, but
// it will support layers printed with a bridging flow.
if (SupportMaterialInternal::has_bridging_extrusions(layer)) {
if (m_object_config->thick_bridges && SupportMaterialInternal::has_bridging_extrusions(layer)) {
coordf_t bridging_height = 0.;
for (const LayerRegion *region : layer.regions())
bridging_height += region->region()->bridging_height_avg(*m_print_config);
@ -1879,12 +1883,14 @@ PrintObjectSupportMaterial::MyLayersPtr PrintObjectSupportMaterial::bottom_conta
//FIXME Check whether the bottom bridging surfaces are extruded correctly (no bridging flow correction applied?)
// According to Jindrich the bottom surfaces work well.
//FIXME test the bridging flow instead?
m_support_material_interface_flow.nozzle_diameter;
m_object_config->thick_bridges.value ? m_support_material_interface_flow.nozzle_diameter() :
// Take the default layer height.
m_object_config->layer_height;
layer_new.print_z = m_slicing_params.soluble_interface ? object.layers()[layer_id + 1]->print_z :
layer.print_z + layer_new.height + m_object_config->support_material_contact_distance.value;
layer_new.bottom_z = layer.print_z;
layer_new.idx_object_layer_below = layer_id;
layer_new.bridging = ! m_slicing_params.soluble_interface;
layer_new.bridging = ! m_slicing_params.soluble_interface && m_object_config->thick_bridges;
//FIXME how much to inflate the bottom surface, as it is being extruded with a bridging flow? The following line uses a normal flow.
//FIXME why is the offset positive? It will be trimmed by the object later on anyway, but then it just wastes CPU clocks.
layer_new.polygons = offset(touching, float(m_support_material_flow.scaled_width()), SUPPORT_SURFACES_OFFSET_PARAMETERS);
@ -2512,7 +2518,7 @@ void PrintObjectSupportMaterial::trim_support_layers_by_object(
break;
polygons_append(polygons_trimming, offset(object_layer.lslices, gap_xy_scaled, SUPPORT_SURFACES_OFFSET_PARAMETERS));
}
if (! m_slicing_params.soluble_interface) {
if (! m_slicing_params.soluble_interface && m_object_config->thick_bridges) {
// Collect all bottom surfaces, which will be extruded with a bridging flow.
for (; i < object.layers().size(); ++ i) {
const Layer &object_layer = *object.layers()[i];
@ -2810,7 +2816,7 @@ std::pair<PrintObjectSupportMaterial::MyLayersPtr, PrintObjectSupportMaterial::M
// Compress contact_out, remove the nullptr items.
remove_nulls(interface_layers);
remove_nulls(base_interface_layers);
BOOST_LOG_TRIVIAL(debug) << "PrintObjectSupportMaterial::generate_interface_layers() in parallel - start";
BOOST_LOG_TRIVIAL(debug) << "PrintObjectSupportMaterial::generate_interface_layers() in parallel - end";
}
return base_and_interface_layers;
@ -2835,7 +2841,7 @@ static inline void fill_expolygon_generate_paths(
dst,
std::move(polylines),
role,
flow.mm3_per_mm(), flow.width, flow.height);
flow.mm3_per_mm(), flow.width(), flow.height());
}
static inline void fill_expolygons_generate_paths(
@ -2903,7 +2909,7 @@ static inline void fill_expolygons_with_sheath_generate_paths(
pl.clip_end(clip_length);
polylines.emplace_back(std::move(pl));
}
extrusion_entities_append_paths(eec->entities, polylines, erSupportMaterial, flow.mm3_per_mm(), flow.width, flow.height);
extrusion_entities_append_paths(eec->entities, polylines, erSupportMaterial, flow.mm3_per_mm(), flow.width(), flow.height());
// Fill in the rest.
fill_expolygons_generate_paths(eec->entities, offset_ex(expoly, float(-0.4 * spacing)), filler, fill_params, density, role, flow);
dst.emplace_back(eec.release());
@ -3011,8 +3017,7 @@ void LoopInterfaceProcessor::generate(MyLayerExtruded &top_contact_layer, const
if (n_contact_loops == 0 || top_contact_layer.empty())
return;
Flow flow = interface_flow_src;
flow.height = float(top_contact_layer.layer->height);
Flow flow = interface_flow_src.with_height(top_contact_layer.layer->height);
Polygons overhang_polygons;
if (top_contact_layer.layer->overhang_polygons != nullptr)
@ -3209,7 +3214,7 @@ void LoopInterfaceProcessor::generate(MyLayerExtruded &top_contact_layer, const
extrusion_entities_append_paths(
top_contact_layer.extrusions,
std::move(loop_lines),
erSupportMaterialInterface, flow.mm3_per_mm(), flow.width, flow.height);
erSupportMaterialInterface, flow.mm3_per_mm(), flow.width(), flow.height());
}
#ifdef SLIC3R_DEBUG
@ -3342,7 +3347,7 @@ void modulate_extrusion_by_overlapping_layers(
// Adjust the extrusion parameters for a reduced layer height and a non-bridging flow (nozzle_dmr = -1, does not matter).
assert(this_layer.print_z > overlapping_layer.print_z);
frag.height = float(this_layer.print_z - overlapping_layer.print_z);
frag.mm3_per_mm = Flow(frag.width, frag.height, -1.f, false).mm3_per_mm();
frag.mm3_per_mm = Flow(frag.width, frag.height, -1.f).mm3_per_mm();
#ifdef SLIC3R_DEBUG
svg.draw(frag.polylines, dbg_index_to_color(i_overlapping_layer), scale_(0.1));
#endif /* SLIC3R_DEBUG */
@ -3565,7 +3570,8 @@ void PrintObjectSupportMaterial::generate_toolpaths(
//FIXME misusing contact_polygons for support columns.
((raft_layer.contact_polygons == nullptr) ? Polygons() : *raft_layer.contact_polygons);
if (! to_infill_polygons.empty()) {
Flow flow(float(m_support_material_flow.width), float(raft_layer.height), m_support_material_flow.nozzle_diameter, raft_layer.bridging);
assert(! raft_layer.bridging);
Flow flow(float(m_support_material_flow.width()), float(raft_layer.height), m_support_material_flow.nozzle_diameter());
Fill * filler = filler_support.get();
filler->angle = raft_angle_base;
filler->spacing = m_support_material_flow.spacing();
@ -3596,7 +3602,8 @@ void PrintObjectSupportMaterial::generate_toolpaths(
// We don't use $base_flow->spacing because we need a constant spacing
// value that guarantees that all layers are correctly aligned.
filler->spacing = m_support_material_flow.spacing();
flow = Flow(float(m_support_material_interface_flow.width), float(raft_layer.height), m_support_material_flow.nozzle_diameter, raft_layer.bridging);
assert(! raft_layer.bridging);
flow = Flow(float(m_support_material_interface_flow.width()), float(raft_layer.height), m_support_material_flow.nozzle_diameter());
density = float(interface_density);
} else
continue;
@ -3734,11 +3741,10 @@ void PrintObjectSupportMaterial::generate_toolpaths(
bool interface_as_base = (&layer_ex == &interface_layer) && m_object_config->support_material_interface_layers.value == 0;
//FIXME Bottom interfaces are extruded with the briding flow. Some bridging layers have its height slightly reduced, therefore
// the bridging flow does not quite apply. Reduce the flow to area of an ellipse? (A = pi * a * b)
Flow interface_flow(
float(layer_ex.layer->bridging ? layer_ex.layer->height : (interface_as_base ? m_support_material_flow.width : m_support_material_interface_flow.width)),
float(layer_ex.layer->height),
m_support_material_interface_flow.nozzle_diameter,
layer_ex.layer->bridging);
auto interface_flow = layer_ex.layer->bridging ?
Flow::bridging_flow(layer_ex.layer->height, m_support_material_interface_flow.nozzle_diameter()) :
Flow(interface_as_base ? m_support_material_flow.width() : m_support_material_interface_flow.width(),
float(layer_ex.layer->height), m_support_material_interface_flow.nozzle_diameter());
filler_interface->angle = interface_as_base ?
// If zero interface layers are configured, use the same angle as for the base layers.
angles[support_layer_id % angles.size()] :
@ -3762,11 +3768,8 @@ void PrintObjectSupportMaterial::generate_toolpaths(
Fill *filler = filler_base_interface.get();
//FIXME Bottom interfaces are extruded with the briding flow. Some bridging layers have its height slightly reduced, therefore
// the bridging flow does not quite apply. Reduce the flow to area of an ellipse? (A = pi * a * b)
Flow interface_flow(
float(base_interface_layer.layer->bridging ? base_interface_layer.layer->height : m_support_material_flow.width), // m_support_material_interface_flow.width)),
float(base_interface_layer.layer->height),
m_support_material_flow.nozzle_diameter,
base_interface_layer.layer->bridging);
assert(! base_interface_layer.layer->bridging);
Flow interface_flow = m_support_material_flow.with_height(float(base_interface_layer.layer->height));
filler->angle = interface_angle;
filler->spacing = m_support_material_interface_flow.spacing();
filler->link_max_length = coord_t(scale_(filler->spacing * link_max_length_factor / interface_density));
@ -3788,11 +3791,8 @@ void PrintObjectSupportMaterial::generate_toolpaths(
filler->angle = angles[support_layer_id % angles.size()];
// We don't use $base_flow->spacing because we need a constant spacing
// value that guarantees that all layers are correctly aligned.
Flow flow(
float(base_layer.layer->bridging ? base_layer.layer->height : m_support_material_flow.width),
float(base_layer.layer->height),
m_support_material_flow.nozzle_diameter,
base_layer.layer->bridging);
assert(! base_layer.layer->bridging);
auto flow = m_support_material_flow.with_height(float(base_layer.layer->height));
filler->spacing = m_support_material_flow.spacing();
filler->link_max_length = coord_t(scale_(filler->spacing * link_max_length_factor / support_density));
float density = float(support_density);