A dual-nozzle H2C print with support filament hangs at its first nozzle
switch. The emitted file shows the change-filament block's M620 O ordinal
jumping from O1 straight to O230, plus a duplicate "M1020 S<n>" toolchange
command right after every change block. Two causes, fixed together because
they interlock (the ordinal check keys off the same toolchange detection
that suppresses the duplicate):
- append_tcr incremented m_toolchange_count once per prime-tower visit
(roughly once per layer), while the change-filament template only emits
its M620 O{toolchange_count + 1} line on real filament changes. With 229
change-less sparse tower layers below the first support layer, the first
real change reported ordinal 230. The counter now advances only when the
expanded change block really contains a toolchange command, and the
placeholder exposes the upcoming change's ordinal (count + 1). The
set_extruder path already counted per real change and is unchanged.
- toolchange_prefix() returned "M1020 S" for BBL printers, so the
custom_gcode_changes_tool() dedup could never match the stock profiles'
line-leading "T[next_filament_id] ..." commands and the writer's own
toolchange was appended after every change block on dual-extruder
machines. The prefix is now the plain "T" (the manual-filament-change tag
branch stays first), and the M1020 form moved into GCodeWriter::toolchange()
as an explicit branch that also carries the nozzle:
"M1020 S<filament> H<nozzle>". The nozzle parameter is signed on purpose:
the null-safe nozzle lookup legitimately yields -1, matching the stock
templates' own H-1 convention.
The prefix change also lets the CoolingBuffer recognize the change blocks'
T commands as tool boundaries on BBL printers (its per-filament attribution
previously keyed off the duplicate M1020, or nothing at all on
single-extruder models); its existing out-of-range guard ignores
T1000-class machine commands.
Verification: full suites green (libslic3r 48998 assertions / 169 cases;
fff_print 692 / 65 including three new scenarios - writer emission per
printer kind, dedup + ordinal progression on sequential prints, and a
prime-tower regression scenario verified to fail against the old per-visit
counting). Byte gate: 18 of 20 fixtures bit-identical; the sequential repro
differs by exactly its 3 removed duplicate M1020 lines, deterministic
across two runs. Reslicing the field project that exposed the hang yields
M620 O1 followed by a gapless O2..O59 and zero duplicate M1020 lines.
Co-authored-by: songwei.li <songwei.li@bambulab.com>
When a per-layer nozzle grouping migrates a filament across nozzle
variants, the write-back turns two groups of config arrays from
filament-indexed into column-indexed: the per-variant filament options
(one column per variant a filament uses) and the merged extruder
retract overrides (resized to the column count by apply_override).
Export-path readers that still indexed them with the raw filament id
read a neighbor's column for every filament ordered after a migrating
one: toolchange/standby temperatures (M104/M109), retraction lengths
and feedrates, wipe distance, z-hop types, air-filtration keys, and -
through the Extruder's cached flow term - the extrusion E of every
move.
Now every such read resolves its column through the existing
layer-aware resolver (get_filament_config_index ->
Print::get_filament_config_indx), which returns the raw filament id
whenever no per-layer grouping result is published, so static prints
are byte-inert by construction. The Extruder itself has no layer
knowledge, so it gains an injected config column (set_config_index,
default = filament id) that the generator refreshes at the only two
resolution-changing events - layer change and writer toolchange - and
that re-syncs the cached e_per_mm3 flow term. Old-filament reads
resolve at the current layer, which is safe because the per-layer maps
are gap-filled carry-forward. Whole-array placeholder copies
(toolchange temperature overrides) are rebuilt in filament order,
mirroring the existing per-variant placeholder remap. The resolvers
move to the public section so non-friend helpers (ooze prevention) can
resolve too.
Documented, deliberately unchanged: the wipe tower's per-filament
parameter rows (no layer dimension; tower x per-layer grouping is a
follow-up), travel_slope's physical-extruder read, estimator pre-heat
bookkeeping temps, and index-0 header diagnostics.
Verification: new Extruder column-injection scenario (defaults, column
follow + flow-cache rescale, filament-indexed reads unaffected, reset
semantics) and a migrating write-back case proving the column shift for
filaments ordered after a migrator and the resolver tracking it (11 +
14 assertions); suites green (libslic3r 48998/169, fff_print 655/61);
20/20 pinned-slice byte gate bit-identical (incl. sequential repro x2
deterministic).
* fix: initialize Print::m_isBBLPrinter
Built outside the GUI/CLI (headless tests, embedded use) the member was read
uninitialized: is_BBL_printer()/wipe_tower_type() feed it into ToolOrdering,
which then non-deterministically dropped per-feature filament assignments.
Default it to false, the value the GUI and CLI already assign for non-Bambu
printers.
* docs(test): add the fff_print testing contract
tests/fff_print/README.md codifies how the suite is organized: one file per
subsystem (each owning both in-memory and emitted-G-code assertions), flat
behavioral test names with a single [Subsystem] tag, a robust-tests guide,
the shared helpers, and an add-a-test checklist. Linked from tests/CLAUDE.md.
* test(fff_print): reorganize the suite to the contract and add coverage
Bring every subsystem into one file per the README: rename the test_data
harness to test_helpers; consolidate skirt/brim; split multi-filament and
cooling into their own files; disperse the test_printgcode grab-bag and the
end-to-end smoke scenario into focused tests; fold test_gcode into
test_gcodewriter. Standardize names and tags, align cube tests on the cube()
helper, and de-qualify the flagship files.
New coverage: multi-filament per-feature and per-object routing; a skirt/brim
behavior matrix (the #14333 rework, including brim ears, with regression
coverage for #14319 and #14366); resolved extrusion-width and config
comments; custom-G-code placeholders; fan control and speed-marker
consumption.
Re-enable three slice tests previously tagged [NotWorking]: the clipper
"Coordinate outside allowed range" error that disabled them was specific to a
past CI runner environment and no longer reproduces.
* test(fff_print): tag arm64-flaky skirt/brim tests NotWorking
Four skirt/brim slice tests intermittently throw ClipperLib's "Coordinate
outside allowed range" on the macOS and Windows arm64 CI toolchains (an FP
divergence, not a slicing bug; see PR #14207). Linux x86_64 and aarch64 are
unaffected. Tag them [NotWorking] so ctest -LE NotWorking skips them.
* test(fff_print): re-enable the arm64 skirt/brim tests
These were tagged [NotWorking] as a stopgap when myfork's daily-driver build
combined them with the cross-platform CI on a base that predated upstream's
m_origin fix (99dea01cc3). With upstream merged in, Print::m_origin is
initialized and the "Coordinate outside allowed range" throw is gone, so the
tests pass on macOS/Windows arm64. Drop the tags.
* Fix null-deref and arranger bugs that gate headless slicing tests
export_gcode dereferenced a null result out-param, enum serialization
dereferenced a null keys_map, and get_arrange_polys left bed_idx unseeded so
the arranger dropped items. All only affect the headless test/CLI path.
* Fix the headless test harness and add G-code test helpers
Use the real arranger, fix temp-file handling with an RAII guard, and add
layers_with_role / max_z for inspecting sliced G-code.
* Re-enable the Model construction test
* Re-enable SupportMaterial tests and add an enforced-support test
* Re-enable and extend PrintObject layer-height and perimeter tests
* Re-enable Print skirt, brim, and solid-surface tests
* Re-enable and extend PrintGCode tests
Un-hide the basic scenario (dead-key fixes, reframes, trimmed trivia) and add
initial-layer-height, sequential-order, and null-result export tests.
* Re-enable and reframe the skirt/brim tests
Detect skirt/brim by G-code role comment instead of a sentinel speed, and
resolve the previously-unfinished skirt-enclosure test.
* Replace the stale lift()/unlift() test with a z_hop test
* Delete the stub and broken Flow tests
* Get libslic3r tests closer to passing
I can't get geometry tests to do anything useful. I've added extra
output, but it hasn't helped me figure out why they don't work
yet. That's also probably the last broken 3mf test doesn't work.
The config tests were mostly broken because of config name changes.
The placeholder_parser tests have some things that may-or-may-not
still apply to Orca.
* Vendor a 3.x version of Catch2
Everything is surely broken at this point.
* Allow building tests separately from Orca with build_linux.sh
* Remove unnecessary log message screwing up ctest
Same solution as Prusaslicer
* Make 2 TriangleMesh methods const
Since they can be.
* Move method comment to the header where it belongsc
* Add indirectly-included header directly
Transform3d IIRC
* libslic3r tests converted to Catch2 v3
Still has 3 failing tests, but builds and runs.
* Disable 2D convex hull test and comment what I've learned
Not sure the best way to solve this yet.
* Add diff compare method for DynamicConfig
Help the unit test report errors better.
* Perl no longer used, remove comment line
* Clang-format Config.?pp
So difficult to work with ATM
* Remove cpp17 unit tests
Who gives a shit
* Don't need explicit "example" test
We have lots of tests to serve as examples.
* Leave breadcrumb to enable sla_print tests
* Fix serialization of DynamicConfig
Add comments to test, because these code paths might not be even used
anymore.
* Update run_unit_tests to run all the tests
By the time I'm done with the PR all tests will either excluded by
default or passing, so just do all.
* Update how-to-test now that build_linux.sh builds tests separately
* Update cmake regenerate instructions
Read this online; hopefully works.
* Enable slic3rutils test with Catch2 v3
* Port libnest2d and fff_print to Catch2 v3
They build. Many failing.
* Add slightly more info to Objects not fit on bed exception
* Disable failing fff_print tests from running
They're mostly failing for "objects don't fit on bed" for an
infinite-sized bed. Given infinite bed is probably only used in tests,
it probably was incidentally broken long ago.
* Must checkout tests directory in GH Actions
So we get the test data
* Missed a failing fff_print test
* Disable (most/all) broken libnest2d tests
Trying all, not checking yet though
* Fix Polygon convex/concave detection tests
Document the implementation too. Reorganize the tests to be cleaner.
* Update the test script to run tests in parallel
* Get sla_print tests to build
Probably not passing
* Don't cause full project rebuild when updating test CMakeLists.txts
* Revert "Clang-format Config.?pp"
This reverts commit 771e4c0ad2.
---------
Co-authored-by: SoftFever <softfeverever@gmail.com>
