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Fix: restore atomic node invalidation in TreeSupport::drop_nodes + drop unused var (R3, R9)

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The 2-node merge moved the two valid=false writes outside the mutex that
upstream held together with the contact_nodes push_back; restore a single
critical section per branch (belt branch also guards to_buildplate).
Remove an unused top_interface_layers local in drop_nodes.
This commit is contained in:
harrierpigeon
2026-08-05 03:35:09 -05:00
parent 0d92180325
commit 10810908a9
1 changed files with 6 additions and 5 deletions
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11
src/libslic3r/Support/TreeSupport.cpp
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@@ -2859,7 +2859,6 @@ void TreeSupport::drop_nodes()
const size_t tip_layers = base_radius / layer_height; //The number of layers to be shrinking the circle to create a tip. This produces a 45 degree angle.
const coordf_t radius_sample_resolution = m_ts_data->m_radius_sample_resolution;
const bool support_on_buildplate_only = config.support_on_build_plate_only.value;
const size_t top_interface_layers = config.support_interface_top_layers.value;
const auto belt_floor_mode = m_print_config->belt_support_floor_mode.value;
const bool has_belt_floor = std::abs(m_slicing_params.belt_floor_shear_factor) > EPSILON
&& belt_floor_mode == BeltSupportFloorMode::GeneratorOnly;
@@ -3100,19 +3099,21 @@ void TreeSupport::drop_nodes()
// Treat as object-surface termination (not buildplate) so
// the node gets floor/interface areas instead of base pads.
if (has_belt_floor && print_z_next <= belt_floor_print_z(next_position)) {
std::scoped_lock lock(m_ts_data->m_mutex);
node_parent->to_buildplate = false;
neighbour->valid = false;
p_node->valid = false;
} else {
const bool to_buildplate = !is_inside_ex(get_collision(0, obj_layer_nr_next), next_position);
SupportNode* next_node = m_ts_data->create_node(next_position, node_parent->distance_to_top + 1, obj_layer_nr_next,
node_parent->support_roof_layers_below - (node_parent->distance_to_top >= 0 ? 1 : 0),
to_buildplate, node_parent, print_z_next, height_next);
get_max_move_dist(next_node);
m_ts_data->m_mutex.lock();
std::scoped_lock lock(m_ts_data->m_mutex);
contact_nodes[layer_nr_next].push_back(next_node);
m_ts_data->m_mutex.unlock();
neighbour->valid = false;
p_node->valid = false;
}
neighbour->valid = false;
p_node->valid = false;
}
else if (neighbours.size() > 1) //Don't merge leaf nodes because we would then incur movement greater than the maximum move distance.
{