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Fixed layers with the wrong color after multi-material segmentation on objects with multiple objects.

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This commit is contained in:
Lukáš Hejl 2021-06-10 08:33:14 +02:00
parent 21b38db488
commit c59cf5de40
1 changed files with 11 additions and 4 deletions
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15
src/libslic3r/MultiMaterialSegmentation.cpp
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@ -236,6 +236,10 @@ static std::vector<ColoredLine> colorize_line(const Line & line_to_
std::vector<PaintedLine> filtered_lines;
filtered_lines.emplace_back(internal_painted.front());
for (size_t line_idx = 1; line_idx < internal_painted.size(); ++line_idx) {
// line_to_process is already all colored. Skip another possible duplicate coloring.
if(filtered_lines.back().projected_line.b == line_to_process.b)
break;
PaintedLine &prev = filtered_lines.back();
PaintedLine &curr = internal_painted[line_idx];
@ -1417,7 +1421,7 @@ std::vector<std::vector<std::pair<ExPolygon, size_t>>> multi_material_segmentati
ExPolygons ex_polygons;
for (LayerRegion *region : layers[layer_idx]->regions())
for (const Surface &surface : region->slices.surfaces)
Slic3r::append(ex_polygons, offset_ex(surface.expolygon, float(SCALED_EPSILON)));
Slic3r::append(ex_polygons, offset_ex(surface.expolygon, float(10 * SCALED_EPSILON)));
// All expolygons are expanded by SCALED_EPSILON, merged, and then shrunk again by SCALED_EPSILON
// to ensure that very close polygons will be merged.
ex_polygons = union_ex(ex_polygons);
@ -1430,7 +1434,7 @@ std::vector<std::vector<std::pair<ExPolygon, size_t>>> multi_material_segmentati
// Such close points sometimes caused that the Voronoi diagram has self-intersecting edges around these vertices.
// This consequently leads to issues with the extraction of colored segments by function extract_colored_segments.
// Calling expolygons_simplify fixed these issues.
input_expolygons[layer_idx] = simplify_polygons_ex(to_polygons(expolygons_simplify(offset_ex(ex_polygons, float(-SCALED_EPSILON)), SCALED_EPSILON)));
input_expolygons[layer_idx] = simplify_polygons_ex(to_polygons(expolygons_simplify(offset_ex(ex_polygons, float(-10 * SCALED_EPSILON)), 5 * SCALED_EPSILON)));
input_polygons[layer_idx] = to_polygons(input_expolygons[layer_idx]);
}
}); // end of parallel_for
@ -1439,7 +1443,8 @@ std::vector<std::vector<std::pair<ExPolygon, size_t>>> multi_material_segmentati
for (size_t layer_idx = 0; layer_idx < layers.size(); ++layer_idx) {
throw_on_cancel_callback();
BoundingBox bbox(get_extents(input_expolygons[layer_idx]));
bbox.offset(SCALED_EPSILON);
// Projected triangles may slightly exceed the input polygons.
bbox.offset(20 * SCALED_EPSILON);
edge_grids[layer_idx].set_bbox(bbox);
edge_grids[layer_idx].create(input_expolygons[layer_idx], coord_t(scale_(10.)));
}
@ -1525,7 +1530,9 @@ std::vector<std::vector<std::pair<ExPolygon, size_t>>> multi_material_segmentati
(first.contour_idx == second.contour_idx &&
(first.line_idx < second.line_idx ||
(first.line_idx == second.line_idx &&
Line(first_start_p, first.projected_line.a).length() < Line(first_start_p, second.projected_line.a).length())));
((first.projected_line.a - first_start_p).cast<double>().squaredNorm() < (second.projected_line.a - first_start_p).cast<double>().squaredNorm() ||
((first.projected_line.a - first_start_p).cast<double>().squaredNorm() == (second.projected_line.a - first_start_p).cast<double>().squaredNorm() &&
(first.projected_line.b - first.projected_line.a).cast<double>().squaredNorm() < (second.projected_line.b - second.projected_line.a).cast<double>().squaredNorm())))));
};
std::sort(painted_lines[layer_idx].begin(), painted_lines[layer_idx].end(), comp);