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Print Belt Brim Aprons in Each Object's Brim Filament

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Apron-only layers printed every band with the first tool, so objects with different brim filaments at the same apron Z shared one filament. Emit each brim filament's bands with its own toolchange.
This commit is contained in:
Hanif Koh
2026-09-13 03:02:36 +08:00
parent 708212a306
commit 19a085206c
2 changed files with 13 additions and 9 deletions
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13
src/libslic3r/GCode.cpp
View File

@@ -5374,7 +5374,12 @@ LayerResult GCode::process_belt_brim_layer(
print.config().layer_change_gcode.value, m_writer->filament()->id(), &config) + "\n";
}
gcode += this->emit_belt_brim_bands(print, layers, single_object_instance_idx);
// Objects sharing this apron Z may use different brim filaments; print each in its own tool.
for (const unsigned int brim_extruder : layer_tools.extruders) {
if (m_writer->filament() == nullptr || m_writer->filament()->id() != brim_extruder)
gcode += this->set_extruder(brim_extruder, print_z);
gcode += this->emit_belt_brim_bands(print, layers, single_object_instance_idx, brim_extruder);
}
result.gcode = std::move(gcode);
return result;
@@ -5389,7 +5394,7 @@ LayerResult GCode::process_belt_brim_layer(
std::string GCode::emit_belt_brim_bands(const Print &print,
const std::vector<LayerToPrint> &layers,
const size_t single_object_instance_idx,
const std::optional<unsigned int> extruder_id)
const unsigned int extruder_id)
{
std::string gcode;
for (const LayerToPrint &ltp : layers) {
@@ -5397,8 +5402,8 @@ std::string GCode::emit_belt_brim_bands(const Print &print,
if (band == nullptr || band->fills.empty() || ltp.original_object == nullptr)
continue;
const PrintObject &object = *ltp.original_object;
// No filter prints every band; belt_brim_filament() is 1-based.
if (extruder_id && (! object.has_belt_brim() || static_cast<unsigned int>(object.belt_brim_filament() - 1) != *extruder_id))
// belt_brim_filament() is 1-based.
if (! object.has_belt_brim() || static_cast<unsigned int>(object.belt_brim_filament() - 1) != extruder_id)
continue;
// Speeds, flow and retraction all read m_config.
m_config.apply(print.default_region_config());

9
src/libslic3r/GCode.hpp
View File

@@ -418,15 +418,14 @@ protected:
const bool last_layer,
const size_t single_object_instance_idx);
// Emit the apron bands carried by these layers, only those whose brim filament is
// extruder_id (0-based) when given. Called from both the brim-only branch and the
// ordinary path, since a band's print_z can coincide with another object's layer on a
// multi-object belt.
// Emit the apron bands carried by these layers whose brim filament is extruder_id
// (0-based). Called from both the brim-only branch and the ordinary path, since a
// band's print_z can coincide with another object's layer on a multi-object belt.
std::string emit_belt_brim_bands(
const Print &print,
const std::vector<LayerToPrint> &layers,
const size_t single_object_instance_idx,
const std::optional<unsigned int> extruder_id = std::nullopt);
const unsigned int extruder_id);
LayerResult process_layer(
const Print &print,