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fix: multi-material slicing crash with line width 0 (#14455)

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This commit is contained in:
Kris Austin
2026-07-22 14:49:37 -05:00
committed by GitHub
parent 5edd4963eb
commit b8cfa32a41
4 changed files with 77 additions and 2 deletions
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15
src/libslic3r/MultiMaterialSegmentation.cpp
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@@ -1177,6 +1177,18 @@ static bool is_volume_sinking(const indexed_triangle_set &its, const Transform3d
//#define MMU_SEGMENTATION_DEBUG_TOP_BOTTOM
double resolve_outer_wall_line_width(const PrintRegionConfig &region_config, const PrintObjectConfig &object_config, const PrintConfig &print_config)
{
// A filament id of 0 underflows, and get_at() then falls back to the first nozzle.
const double nozzle_diameter = print_config.nozzle_diameter.get_at(region_config.outer_wall_filament_id - 1);
ConfigOptionFloatOrPercent width = region_config.outer_wall_line_width;
if (width.value == 0)
width = object_config.line_width;
if (!width.percent && width.value <= 0.)
return Flow::auto_extrusion_width(frExternalPerimeter, float(nozzle_diameter));
return width.get_abs_value(nozzle_diameter);
}
// Returns segmentation of top and bottom layers based on painting in segmentation gizmos.
static inline std::vector<std::vector<ExPolygons>> segmentation_top_and_bottom_layers(const PrintObject &print_object,
const std::vector<ExPolygons> &input_expolygons,
@@ -1347,8 +1359,7 @@ static inline std::vector<std::vector<ExPolygons>> segmentation_top_and_bottom_l
// As this region may split existing regions, we collect statistics over all regions for color_idx == 0.
color_idx == 0 || config.outer_wall_filament_id == int(color_idx)) {
//BBS: the extrusion line width is outer wall rather than inner wall
const double nozzle_diameter = print_object.print()->config().nozzle_diameter.get_at(0);
double outer_wall_line_width = config.get_abs_value("outer_wall_line_width", nozzle_diameter);
double outer_wall_line_width = resolve_outer_wall_line_width(config, print_object.config(), print_object.print()->config());
out.extrusion_width = std::max<float>(out.extrusion_width, outer_wall_line_width);
out.top_shell_layers = std::max<int>(out.top_shell_layers, config.top_shell_layers);
out.bottom_shell_layers = std::max<int>(out.bottom_shell_layers, config.bottom_shell_layers);

6
src/libslic3r/MultiMaterialSegmentation.hpp
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@@ -9,6 +9,9 @@ namespace Slic3r {
class ExPolygon;
class ModelVolume;
class PrintObject;
class PrintConfig;
class PrintObjectConfig;
class PrintRegionConfig;
class FacetsAnnotation;
using ExPolygons = std::vector<ExPolygon>;
@@ -52,6 +55,9 @@ std::vector<std::vector<ExPolygons>> multi_material_segmentation_by_painting(con
// Returns fuzzy skin segmentation based on painting in fuzzy skin segmentation gizmo
std::vector<std::vector<ExPolygons>> fuzzy_skin_segmentation_by_painting(const PrintObject &print_object, const std::function<void()> &throw_on_cancel_callback);
// Effective outer-wall line width for a region, resolved against its own nozzle with PrintRegion::flow's fallback.
double resolve_outer_wall_line_width(const PrintRegionConfig &region_config, const PrintObjectConfig &object_config, const PrintConfig &print_config);
} // namespace Slic3r
namespace boost::polygon {