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feat(libslic3r): multi-nozzle slicing engine for H2C/A2L

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Port BambuStudio's dual-nozzle slicing core: H2C-era config keys, filament-to-nozzle grouping with per-layer dynamic regrouping, filament/nozzle/hotend gcode placeholder vocabulary, multi-nozzle wipe tower pre-heat/pre-cool, the two-pass pre-cooling injector, and corexy farthest-point timelapse.
This commit is contained in:
SoftFever
2026-07-09 00:06:26 +08:00
parent 781ecdc2c1
commit 237ef41b06
36 changed files with 7622 additions and 708 deletions
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25
src/libslic3r/GCodeWriter.cpp
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@@ -632,6 +632,25 @@ std::string GCodeWriter::toolchange(unsigned int filament_id)
return gcode.str();
}
// Current parked-retract length of the filament's extruder, share-aware. m_filament_extruders is
// sorted by id (see toolchange), so a lower_bound lookup finds the entry; unknown filament ids
// degrade to 0 rather than dereferencing end().
double GCodeWriter::get_extruder_retracted_length(const int filament_id)
{
double res = 0.0;
auto filament_extruder_iter = Slic3r::lower_bound_by_predicate(m_filament_extruders.begin(), m_filament_extruders.end(),
[filament_id](const Extruder &e) { return (int) e.id() < filament_id; });
if (filament_extruder_iter == m_filament_extruders.end() || (int) filament_extruder_iter->id() != filament_id)
return res;
if (filament_extruder_iter->is_share_extruder())
res = filament_extruder_iter->get_share_retracted_length();
else
res = filament_extruder_iter->get_single_retracted_length();
return res;
}
std::string GCodeWriter::set_speed(double F, const std::string &comment, const std::string &cooling_marker)
{
assert(F > 0.);
@@ -1101,7 +1120,7 @@ std::string GCodeWriter::_retract(double length, double restart_extra, const std
return gcode;
}
std::string GCodeWriter::unretract()
std::string GCodeWriter::unretract(float extra_retract)
{
std::string gcode;
@@ -1117,7 +1136,9 @@ std::string GCodeWriter::unretract()
//BBS
// use G1 instead of G0 because G0 will blend the restart with the previous travel move
GCodeG1Formatter w;
w.emit_e(filament()->E());
// extra_retract over-extrudes for the PETG pre-extrusion; 0 by
// default -> identical to the plain deretract E position.
w.emit_e(filament()->E() + extra_retract);
w.emit_f(filament()->deretract_speed() * 60.);
//BBS
w.emit_comment(GCodeWriter::full_gcode_comment, " ; unretract");