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Rotate instead of shear for slicing stage (#30)

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* initial commit

* fix upper bounds for assemblies

* significantly less Z shift issues, still not quite tamped down yet though

* add instrumentation to logs

* finally found the issue

* update printer defaults
This commit is contained in:
Joseph Robertson
2026-05-22 15:21:33 -05:00
committed by GitHub
parent 218881c6f6
commit a9bae54f20
16 changed files with 513 additions and 96 deletions
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src/libslic3r/FirstLayerPlane.cpp
+7 -7
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@@ -84,12 +84,12 @@ FirstLayerPlane::FirstLayerPlane(const PrintConfig &config)
// -------- Resolve Auto -------------------------------------------------
FirstLayerPlaneMode mode = config.first_layer_plane.value;
if (mode == FirstLayerPlaneMode::Auto) {
if (config.belt_printer.value &&
config.belt_shear_z.value != BeltShearMode::None) {
mode = FirstLayerPlaneMode::BeltShear;
} else {
mode = FirstLayerPlaneMode::XY;
}
bool belt_affine_active = config.belt_printer.value &&
(config.belt_shear_z.value != BeltShearMode::None ||
(config.belt_slice_rotation.value != BeltRotationAxis::None &&
std::abs(config.belt_slice_rotation_angle.value) > EPSILON));
mode = belt_affine_active ? FirstLayerPlaneMode::BeltAffine
: FirstLayerPlaneMode::XY;
}
m_mode = mode;
@@ -130,7 +130,7 @@ FirstLayerPlane::FirstLayerPlane(const PrintConfig &config)
m_active = true;
return;
case FirstLayerPlaneMode::BeltShear: {
case FirstLayerPlaneMode::BeltAffine: {
// Compute the slicing-frame plane that maps to machine_Z = user_offset
// under the gcode axis remap (and optional back-transform).
MachineZAffine mz = compute_machine_z_affine(config);