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fix: adaptive layer height profile uses uncompensated Z height (#12080)

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layer_height_profile_adaptive() was using object_print_z_height()
(shrinkage-compensated) to bound the profile, but
update_layer_height_profile() validates against
object_print_z_uncompensated_max. When shrinkage compensation is
active, the mismatch causes the adaptive profile to be silently
cleared every frame and replaced with flat layers.

Use object_print_z_uncompensated_height() instead, matching both
the validator and the existing layer_height_profile_from_ranges()
implementation which already uses the uncompensated value.

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
mrmees
2026-01-26 17:04:21 -06:00
committed by GitHub
parent a254bec6b2
commit b9ada2542a
1 changed files with 3 additions and 3 deletions
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6
src/libslic3r/Slicing.cpp
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@@ -260,7 +260,7 @@ std::vector<double> layer_height_profile_adaptive(const SlicingParameters& slici
// last facet visited by the as.next_layer_height() function, where the facets are sorted by their increasing Z span.
size_t current_facet = 0;
// loop until we have at least one layer and the max slice_z reaches the object height
while (print_z + EPSILON < slicing_params.object_print_z_height()) {
while (print_z + EPSILON < slicing_params.object_print_z_uncompensated_height()) {
float height = slicing_params.max_layer_height;
// Slic3r::debugf "\n Slice layer: %d\n", $id;
// determine next layer height
@@ -331,10 +331,10 @@ std::vector<double> layer_height_profile_adaptive(const SlicingParameters& slici
print_z += height;
}
double z_gap = slicing_params.object_print_z_height() - *(layer_height_profile.end() - 2);
double z_gap = slicing_params.object_print_z_uncompensated_height() - *(layer_height_profile.end() - 2);
if (z_gap > 0.0)
{
layer_height_profile.push_back(slicing_params.object_print_z_height());
layer_height_profile.push_back(slicing_params.object_print_z_uncompensated_height());
layer_height_profile.push_back(std::clamp(z_gap, slicing_params.min_layer_height, slicing_params.max_layer_height));
}