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Belt: follow-ups from a second review pass

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Guard the layer count and the per-object layer collection against an
object that is left without a layer to print on a belt (the counting
loop stepped before begin() and front() was taken of an empty vector).
Check the belt temperature tower's embossed model before the current
project is replaced, not after.  Only invalidate the support step of
objects that own a belt brim when an object is added or removed.  The
empty-layers test now counts an extrusion only where material is laid
down along a move.  The BeltBrim.cpp SEQUENCING note says exactly which
layers are read, and the machine-frame scale is 1/|sin|.

Remove more code that nothing calls: the kinematics inverse
(to_logical, apply_axis_remap_inverse, to_build_volume and the state
kept for them), the world_coordinates(), is_active() and
belt_brim_areas_by_layer() accessors, the PrintConfig overload of
physical_tilt() and the DynamicPrintConfig overload of
compute_belt_height_and_floor().  Comments in GCode.hpp,
BeltSliceStrategy.hpp/.cpp and PrintObjectSlice.cpp that described the
retired pre-slice remap and plane-evaluator still did; the purge-tower
width tooltip named the wrong switch.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
This commit is contained in:
harrierpigeon
2026-10-07 19:08:59 -05:00
co-authored by Claude Fable 5.1
parent a564ec23fe
commit cfad587c2d
19 changed files with 83 additions and 186 deletions
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src/libslic3r/BeltGCode.cpp
+1 -1
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@@ -25,7 +25,7 @@ void BeltGCode::write_belt_header(GCodeOutputStream &file, const Print &print)
// for the physical tilt the G-code viewer uses to enable belt view.
file.write_format("; belt_slice_rotation = %s\n", full_cfg.opt_serialize("belt_slice_rotation").c_str());
file.write_format("; belt_slice_rotation_angle = %.1f\n", print.config().belt_slice_rotation_angle.value);
// Machine-frame transform: shear (cot) + scale (1/sin) derived from the belt
// Machine-frame transform: shear (cot) + scale (1/|sin|) derived from the belt
// tilt angle (or belt_frame_tilt_angle when decoupled).
file.write_format("; belt_frame_tilt_decouple = %d\n", print.config().belt_frame_tilt_decouple.value ? 1 : 0);
file.write_format("; belt_frame_tilt_angle = %.1f\n", print.config().belt_frame_tilt_angle.value);