External spools (virtual trays) are not AMS slots and should not count
toward the firmware's 16-material limit. Fixes blocking error when using
4 AMS units (16 slots) plus an external spool (17 total).
Fixes#12135
extrude_to_xyz() unconditionally emitted Z on every extrusion move
via emit_xyz(), even when Z hadn't changed. With ZAA enabled, this
produced ~987K redundant Z coordinates (98.2% of all Z emissions),
causing 10-20% file bloat.
Now compares quantized Z values before and after, and only emits Z
when it actually differs at export precision (0.001mm). Reduces
ZAA gcode Z emissions from 1,038,468 to 50,022 while preserving
all legitimate contouring Z changes.
The split point was being prepended (append_before) to p1 instead of
appended, causing it to be placed at the start of the segment rather
than the end. This resulted in rogue extrusion jumps (stringing)
across the model during ZAA sloped extrusions.
Also adds missing append/append_before calls in the exact-point
(index != -1) branch, which previously lost the split point entirely.
- build.sh: Handles full lifecycle (deps, configure, incremental build)
with auto-detection of architecture, CMake 4.x compat, and preflight checks
- BUILD.md: Beginner-friendly walkthrough from zero (no Xcode, no Homebrew,
no git) to running OrcaSlicer.app
Port Z Anti-Aliasing from BambuStudio-ZAA (https://github.com/adob/BambuStudio-ZAA)
to OrcaSlicer. ZAA eliminates stair-stepping on curved and sloped top surfaces
by raycasting each extrusion point against the original 3D mesh and micro-adjusting
Z height to follow the actual surface geometry.
Key changes:
- Add ContourZ.cpp raycasting algorithm (~330 lines)
- Extend geometry with 3D support (Point3, Line3, Polyline3, MultiPoint3)
- Template arc fitting for 2D/3D compatibility
- Change ExtrusionPath::polyline from Polyline to Polyline3
- Add 5 ZAA config options (zaa_enabled, zaa_min_z, etc.)
- Add posContouring pipeline step in PrintObject
- Update GCode writer for 3D coordinate output
- Add ZAA settings UI in Print Settings > Quality
- Add docs/ZAA.md with usage and implementation details
ZAA is opt-in and disabled by default. When disabled, the slicing pipeline
is unchanged.
Matthias Nott