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SPE-2446: Trim propagated top and bottom layers by the painted bottom or top layers during top and bottom layer propagation in the multi-material segmentation.

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On short objects, those propagated layers could override the painted top or bottom layers.
This commit is contained in:
Lukáš Hejl 2024-08-23 10:34:23 +02:00 committed by Lukas Matena
parent 9397da61fc
commit 3e4e9835f9
1 changed files with 36 additions and 6 deletions
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34
src/libslic3r/MultiMaterialSegmentation.cpp
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@ -883,6 +883,19 @@ static bool is_volume_sinking(const indexed_triangle_set &its, const Transform3d
return false;
}
static inline ExPolygons trim_by_top_or_bottom_layer(ExPolygons expolygons_to_trim, const size_t top_or_bottom_layer_idx, const std::vector<std::vector<Polygons>> &top_or_bottom_raw_by_extruder) {
for (const std::vector<Polygons> &top_or_bottom_raw : top_or_bottom_raw_by_extruder) {
if (top_or_bottom_raw.empty())
continue;
if (const Polygons &top_or_bottom = top_or_bottom_raw[top_or_bottom_layer_idx]; !top_or_bottom.empty()) {
expolygons_to_trim = diff_ex(expolygons_to_trim, top_or_bottom);
}
}
return expolygons_to_trim;
}
// Returns MM segmentation of top and bottom layers based on painting in MM segmentation gizmo
static inline std::vector<std::vector<ExPolygons>> mm_segmentation_top_and_bottom_layers(const PrintObject &print_object,
const std::vector<ExPolygons> &input_expolygons,
@ -1074,11 +1087,12 @@ static inline std::vector<std::vector<ExPolygons>> mm_segmentation_top_and_botto
for (size_t color_idx = 0; color_idx < num_extruders; ++ color_idx) {
throw_on_cancel_callback();
LayerColorStat stat = layer_color_stat(layer_idx, color_idx);
if (std::vector<Polygons> &top = top_raw[color_idx]; ! top.empty() && ! top[layer_idx].empty())
if (std::vector<Polygons> &top = top_raw[color_idx]; !top.empty() && !top[layer_idx].empty()) {
if (ExPolygons top_ex = union_ex(top[layer_idx]); !top_ex.empty()) {
// Clean up thin projections. They are not printable anyways.
if (stat.small_region_threshold > 0)
top_ex = opening_ex(top_ex, stat.small_region_threshold);
if (!top_ex.empty()) {
append(triangles_by_color_top[color_idx][layer_idx + layer_idx_offset], top_ex);
float offset = 0.f;
@ -1087,19 +1101,28 @@ static inline std::vector<std::vector<ExPolygons>> mm_segmentation_top_and_botto
offset -= stat.extrusion_width;
layer_slices_trimmed = intersection_ex(layer_slices_trimmed, input_expolygons[last_idx]);
ExPolygons last = intersection_ex(top_ex, offset_ex(layer_slices_trimmed, offset));
// Trim this propagated top layer by the painted bottom layer.
last = trim_by_top_or_bottom_layer(last, size_t(last_idx), bottom_raw);
if (stat.small_region_threshold > 0)
last = opening_ex(last, stat.small_region_threshold);
if (last.empty())
break;
append(triangles_by_color_top[color_idx][last_idx + layer_idx_offset], std::move(last));
}
}
}
if (std::vector<Polygons> &bottom = bottom_raw[color_idx]; ! bottom.empty() && ! bottom[layer_idx].empty())
}
if (std::vector<Polygons> &bottom = bottom_raw[color_idx]; !bottom.empty() && !bottom[layer_idx].empty()) {
if (ExPolygons bottom_ex = union_ex(bottom[layer_idx]); !bottom_ex.empty()) {
// Clean up thin projections. They are not printable anyways.
if (stat.small_region_threshold > 0)
bottom_ex = opening_ex(bottom_ex, stat.small_region_threshold);
if (!bottom_ex.empty()) {
append(triangles_by_color_bottom[color_idx][layer_idx + layer_idx_offset], bottom_ex);
float offset = 0.f;
@ -1108,16 +1131,23 @@ static inline std::vector<std::vector<ExPolygons>> mm_segmentation_top_and_botto
offset -= stat.extrusion_width;
layer_slices_trimmed = intersection_ex(layer_slices_trimmed, input_expolygons[last_idx]);
ExPolygons last = intersection_ex(bottom_ex, offset_ex(layer_slices_trimmed, offset));
// Trim this propagated bottom layer by the painted top layer.
last = trim_by_top_or_bottom_layer(last, size_t(last_idx), top_raw);
if (stat.small_region_threshold > 0)
last = opening_ex(last, stat.small_region_threshold);
if (last.empty())
break;
append(triangles_by_color_bottom[color_idx][last_idx + layer_idx_offset], std::move(last));
}
}
}
}
}
}
});
std::vector<std::vector<ExPolygons>> triangles_by_color_merged(num_extruders);