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Fix division by zero in organic tree support generation (#13936)

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This commit is contained in:
Kiss Lorand
2026-05-30 00:09:47 +03:00
committed by GitHub
parent 00ead43e5a
commit 9be51dc3e6
1 changed files with 16 additions and 2 deletions
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18
src/libslic3r/Support/TreeSupport3D.cpp
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@@ -124,6 +124,9 @@ static std::vector<std::pair<TreeSupportSettings, std::vector<size_t>>> group_me
{
std::vector<std::pair<TreeSupportSettings, std::vector<size_t>>> grouped_meshes;
// Orca: Recompute static mesh-group state for this support generation pass.
TreeSupportSettings::zero_top_z_gap = false;
//FIXME this is ugly, it does not belong here.
for (size_t object_id : print_object_ids) {
const PrintObject &print_object = *print.get_object(object_id);
@@ -1604,9 +1607,14 @@ static Point move_inside_if_outside(const Polygons &polygons, Point from, int di
if (settings.move) {
increased = relevant_offset;
if (overspeed > 0) {
const coord_t safe_movement_distance =
coord_t safe_movement_distance =
(current_elem.use_min_xy_dist ? config.xy_min_distance : config.xy_distance) +
(std::min(config.z_distance_top_layers, config.z_distance_bottom_layers) > 0 ? config.min_feature_size : 0);
// Orca:
// safe_movement_distance is used as the safe_offset_inc() step, so keep it non-zero
// to preserve branch movement with zero-clearance support settings.
if (safe_movement_distance == 0)
safe_movement_distance = scaled<coord_t>(0.1);
// The difference to ensure that the result not only conforms to wall_restriction, but collision/avoidance is done later.
// The higher last_safe_step_movement_distance comes exactly from the fact that the collision will be subtracted later.
increased = safe_offset_inc(increased, overspeed, volumes.getWallRestriction(support_element_collision_radius(config, parent.state), layer_idx, parent.state.use_min_xy_dist),
@@ -1817,9 +1825,15 @@ static void increase_areas_one_layer(
* layer z-1:dddddxxxxxxxxxx
* For more detailed visualisation see calculateWallRestrictions
*/
const coord_t safe_movement_distance =
coord_t safe_movement_distance =
(elem.use_min_xy_dist ? config.xy_min_distance : config.xy_distance) +
(std::min(config.z_distance_top_layers, config.z_distance_bottom_layers) > 0 ? config.min_feature_size : 0);
// safe_movement_distance is used as a divisor and as the safe_offset_inc() step,
// so keep it non-zero to avoid division by zero and preserve branch movement.
if (safe_movement_distance == 0)
safe_movement_distance = scaled<coord_t>(0.1);
if (ceiled_parent_radius == volumes.ceilRadius(projected_radius_increased, parent.state.use_min_xy_dist) ||
projected_radius_increased < config.increase_radius_until_radius)
// If it is guaranteed possible to increase the radius, the maximum movement speed can be increased, as it is assumed that the maximum movement speed is the one of the slower moving wall