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Use different threshold for top & bottom surfaces

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This commit is contained in:
Noisyfox 2025-03-30 00:05:06 +08:00
parent 6bd2355a69
commit c2a1a8c39b
1 changed files with 6 additions and 5 deletions
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11
src/libslic3r/PrintObject.cpp
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@ -1312,7 +1312,8 @@ void PrintObject::detect_surfaces_type()
Layer *upper_layer = (idx_layer + 1 < this->layer_count()) ? m_layers[idx_layer + 1] : nullptr;
Layer *lower_layer = (idx_layer > 0) ? m_layers[idx_layer - 1] : nullptr;
// collapse very narrow parts (using the safety offset in the diff is not enough)
float offset = layerm->flow(frExternalPerimeter).scaled_width() / 10.f;
const float offset_top = layerm->flow(frExternalPerimeter).scaled_width() / 10.f;
const float offset_bottom = layerm->flow(frExternalPerimeter).scaled_width();
ExPolygons layerm_slices_surfaces = to_expolygons(layerm->slices.surfaces);
// no_perimeter_full_bridge allow to put bridges where there are nothing, hence adding area to slice, that's why we need to start from the result of PerimeterGenerator.
@ -1327,7 +1328,7 @@ void PrintObject::detect_surfaces_type()
ExPolygons upper_slices = interface_shells ?
diff_ex(layerm_slices_surfaces, upper_layer->m_regions[region_id]->slices.surfaces, ApplySafetyOffset::Yes) :
diff_ex(layerm_slices_surfaces, upper_layer->lslices, ApplySafetyOffset::Yes);
surfaces_append(top, opening_ex(upper_slices, offset), stTop);
surfaces_append(top, opening_ex(upper_slices, offset_top), stTop);
} else {
// if no upper layer, all surfaces of this one are solid
// we clone surfaces because we're going to clear the slices collection
@ -1353,7 +1354,7 @@ void PrintObject::detect_surfaces_type()
bottom,
opening_ex(
diff_ex(layerm_slices_surfaces, lower_layer->lslices, ApplySafetyOffset::Yes),
offset),
offset_bottom),
surface_type_bottom_other);
// if user requested internal shells, we need to identify surfaces
// lying on other slices not belonging to this region
@ -1367,7 +1368,7 @@ void PrintObject::detect_surfaces_type()
intersection(layerm_slices_surfaces, lower_layer->lslices), // supported
lower_layer->m_regions[region_id]->slices.surfaces,
ApplySafetyOffset::Yes),
offset),
offset_bottom),
stBottom);
}
#endif
@ -1385,7 +1386,7 @@ void PrintObject::detect_surfaces_type()
if (! top.empty() && ! bottom.empty()) {
const auto cracks = intersection_ex(top, bottom);
if (!cracks.empty()) {
const float small_crack_threshold = -(layerm->flow(frExternalPerimeter).scaled_width());
const float small_crack_threshold = -offset_bottom;
for (const auto& crack : cracks) {
if (offset_ex(crack, small_crack_threshold).empty()) {