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feat: Add Z Anti-Aliasing (ZAA) contouring support

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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.
This commit is contained in:
Matthias Nott
2026-02-09 20:42:26 +01:00
parent cae1567726
commit 963f8d86b7
57 changed files with 1817 additions and 204 deletions
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src/libslic3r/GCode/PrintExtents.cpp
+3 -3
View File
@@ -30,7 +30,7 @@ static inline BoundingBox extrusion_polyline_extents(const Polyline &polyline, c
static inline BoundingBoxf extrusionentity_extents(const ExtrusionPath &extrusion_path)
{
BoundingBox bbox = extrusion_polyline_extents(extrusion_path.polyline, coord_t(scale_(0.5 * extrusion_path.width)));
BoundingBox bbox = extrusion_polyline_extents(extrusion_path.polyline.to_polyline(), coord_t(scale_(0.5 * extrusion_path.width)));
BoundingBoxf bboxf;
if (! empty(bbox)) {
bboxf.min = unscale(bbox.min);
@@ -44,7 +44,7 @@ static inline BoundingBoxf extrusionentity_extents(const ExtrusionLoop &extrusio
{
BoundingBox bbox;
for (const ExtrusionPath &extrusion_path : extrusion_loop.paths)
bbox.merge(extrusion_polyline_extents(extrusion_path.polyline, coord_t(scale_(0.5 * extrusion_path.width))));
bbox.merge(extrusion_polyline_extents(extrusion_path.polyline.to_polyline(), coord_t(scale_(0.5 * extrusion_path.width))));
BoundingBoxf bboxf;
if (! empty(bbox)) {
bboxf.min = unscale(bbox.min);
@@ -58,7 +58,7 @@ static inline BoundingBoxf extrusionentity_extents(const ExtrusionMultiPath &ext
{
BoundingBox bbox;
for (const ExtrusionPath &extrusion_path : extrusion_multi_path.paths)
bbox.merge(extrusion_polyline_extents(extrusion_path.polyline, coord_t(scale_(0.5 * extrusion_path.width))));
bbox.merge(extrusion_polyline_extents(extrusion_path.polyline.to_polyline(), coord_t(scale_(0.5 * extrusion_path.width))));
BoundingBoxf bboxf;
if (! empty(bbox)) {
bboxf.min = unscale(bbox.min);