The physical_extruder_map translation used by IMEX per-tool PA emission was
inlined identically at two sites in GCode.cpp (tool-change and second-layer
transition). Extract to IMEXHelpers so the routing rule ("parallel mode AND
populated pem → physical index, else -1") is testable in isolation and the
call sites read as intent rather than re-deriving the conditional.
Production change is behavior-preserving:
- Same predicate (`!mode.empty() && mode != "primary"`)
- Same empty-pem short-circuit returning -1
- Same get_at() dispatch on hit
- Both call sites replaced with a single call
Four unit tests in [IMEX] cover the routing matrix:
- non-IMEX ("") and primary mode short-circuit
- parallel mode + empty pem short-circuits (defense-in-depth; get_at would
throw on empty values otherwise)
- identity pem (non-MMU IDEX) routes filament to itself
- MMU collapse routes multiple logical slots to one physical (7-slot profile
with 4-lane MMU on physical 0 and direct drives on 1/2/3)
All IMEX + Variant regression suites pass post-refactor (133 assertions / 48
cases under libslic3r, 25 assertions / 6 cases under fff_print [PressureAdvance]).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Replace imex_head_transform's fifth argument (Vec3d primary_origin) with a
Vec2d primary_zone_center and rewrite the Mirror branch as a true reflection
about the plane x = primary_zone_center.x + gantry_offset.x/2. Previous math
flipped about the primary's current origin, which:
* let the ghost drift out of the target zone as the primary moved, and
* made mirrored drag motion track 1:1 with the primary instead of reflecting.
The new transform places the ghost at the mirrored position within the target
zone (matching where the mirror tool actually prints) and reflects drag so
primary +X → ghost -X while Y tracks 1:1 — i.e. the ghost stays a true
mirror while the user drags. Off-row Mirror targets (e.g. T3 on a 2x2) still
reflect across the same X-plane as on-row peers.
PartPlate::calc_imex_ghosts and update_imex_ghost_transforms now feed primary_off
(the primary head's zone center) instead of an instance-space Vec3d.
Mirror tests rewritten against the new geometric contract: ghost origin at the
reflected position, primary drag deltas reflected across the zone-boundary plane.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Centralize the project→printer→printer_extruder_id fallback for the physical
extruder map. PrintApply, PartPlate (ghost color + cache key), Plater (tooltip
+ click gate) all previously open-coded the three-step lookup, and each handled
the "pem unset, derive from pei" case slightly differently — an IDEX printer
without an explicit pem could paint an UNPRINTABLE_COLOR ghost even though the
slicer would have derived a valid mapping.
- IMEXHelpers: add effective_physical_extruder_map(explicit_pem, pei) and a
PresetBundle overload that wraps the project→printer precedence.
- PrintApply: use the helper in place of the inline pei→pem normalization.
- PartPlate / Plater: call the PresetBundle overload at every ghost-color,
ghost-cache-key, tooltip, and click-gate site.
- Plater::format_imex_ghost_tooltip: when no filament resolves to a head,
surface an actionable message directing the user to extend the extruder
count in the Machine tab, instead of the generic "(no filament routed)".
- IMEXFilamentPickerPopover: hold m_pem by value so callers can pass a
stack-local derived pem without lifetime worries.
- Tests: 5 new cases covering explicit-wins, default-pem fallback, null
inputs, and the IDEX ghost-color regression that motivated this.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Replaces the plater-icon popover with colored transparent ghost copies
of primary-head instances on the plate, one per secondary active head
under its Copy/Mirror role transform. Left-click on a ghost opens a
compact filament picker popover for the ghost's head (MMU lane override).
Ghosts track the primary through drag/rotate/scale/mirror and invalidate
on mode or pem changes.
Key pieces:
IMEXHelpers -- imex_head_transform (Primary/Copy/Mirror), shared role
parser, per-head filament resolution with X-axis Mirror anchor.
PartPlate -- ghost state, volume rebuild on mode/map/object mutation,
primary_origin plumbed for Mirror reflection across the primary-row
gantry plane.
GLCanvas3D -- ghost rendering with per-head filament color and
translucent blending; picking routed via volume composite id.
Plater -- ghost click + tooltip; plater icon left-click always cycles.
IMEXFilamentPickerPopover -- BitmapComboBox row for one secondary head,
writes imex_head_filament_map on selection.
bbs_3mf -- round-trip the per-plate imex_head_filament_map option.
PrintConfig -- add imex_head_filament_map as a plate option.
MMU/AFC routing for parallel modes relies on the printer profile's
physical_extruder_map (see prior commit for authoring format). Primary-
row heads and their per-plate filament overrides are resolved through
that map, so PA and temperature emission address the correct physical
extruder when multiple logical slots share one carriage.
Tests: IMEXHelpers coverage for Primary/Copy/Mirror transforms
including a 2x2 off-row regression guard for the X-axis reflection fix.
