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Fixes Support Interface printed on air #2903

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Fixes Supports generated loose in space #4874
Fixes Support Interface layers in midair #5016
This commit is contained in:
Vojtech Bubnik 2021-02-22 18:01:13 +01:00
parent d2ca4563e8
commit 3985d7bb81
1 changed files with 25 additions and 41 deletions
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66
src/libslic3r/SupportMaterial.cpp
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@ -1376,6 +1376,7 @@ PrintObjectSupportMaterial::MyLayersPtr PrintObjectSupportMaterial::top_contact_
// Get the regions needing a suport, collapse very tiny spots.
//FIXME cache the lower layer offset if this layer has multiple regions.
#if 1
//FIXME this solution will trigger stupid supports for sharp corners, see GH #4874
diff_polygons = offset2(
diff(layerm_polygons,
offset2(lower_layer_polygons, - 0.5f * fw, lower_layer_offset + 0.5f * fw, SUPPORT_SURFACES_OFFSET_PARAMETERS)),
@ -1602,7 +1603,10 @@ PrintObjectSupportMaterial::MyLayersPtr PrintObjectSupportMaterial::top_contact_
slices_margin_cached);
SupportGridPattern support_grid_pattern(
// Support islands, to be stretched into a grid.
dense_interface_polygons,
//FIXME The regularization of dense_interface_polygons above may stretch dense_interface_polygons outside of the contact polygons,
// thus some dense interface areas may not get supported. Trim the excess with contact_polygons at the following line.
// See for example GH #4874.
intersection(dense_interface_polygons, *new_layer.contact_polygons),
// Trimming polygons, to trim the stretched support islands.
slices_margin_cached,
// Grid resolution.
@ -1611,50 +1615,30 @@ PrintObjectSupportMaterial::MyLayersPtr PrintObjectSupportMaterial::top_contact_
m_support_material_flow.spacing());
new_layer.polygons = support_grid_pattern.extract_support(m_support_material_flow.scaled_spacing()/2 + 5, false);
#ifdef SLIC3R_DEBUG
{
BoundingBox bbox = get_extents(dense_interface_polygons);
bbox.merge(get_extents(slices_margin_cached));
bbox.merge(get_extents(new_layer.polygons));
::Slic3r::SVG svg(debug_out_path("support-top-contacts-grid-run%d-layer%d-z%f.svg", iRun, layer_id, layer.print_z), bbox);
svg.draw(union_ex(lower_layer_polygons, false), "gray", 0.2f);
svg.draw(union_ex(*new_layer.contact_polygons, false), "gray", 0.5f);
svg.draw(union_ex(slices_margin_cached, false), "blue", 0.5f);
svg.draw(union_ex(dense_interface_polygons, false), "green", 0.5f);
svg.draw(union_ex(new_layer.polygons, true), "red", 0.5f);
svg.draw_outline(union_ex(new_layer.polygons, true), "black", "black", scale_(0.1f));
}
#endif /* SLIC3R_DEBUG */
#ifdef SLIC3R_DEBUG
{
//support_grid_pattern.serialize(debug_out_path("support-top-contacts-final-run%d-layer%d-z%f.bin", iRun, layer_id, layer.print_z));
BoundingBox bbox = get_extents(contact_polygons);
bbox.merge(get_extents(new_layer.polygons));
::Slic3r::SVG svg(debug_out_path("support-top-contacts-final0-run%d-layer%d-z%f.svg", iRun, layer_id, layer.print_z), bbox);
svg.draw(union_ex(lower_layer_polygons, false), "gray", 0.2f);
svg.draw(union_ex(*new_layer.contact_polygons, false), "gray", 0.5f);
svg.draw(union_ex(contact_polygons, false), "blue", 0.5f);
svg.draw(union_ex(dense_interface_polygons, false), "green", 0.5f);
svg.draw(union_ex(new_layer.polygons, true), "red", 0.5f);
svg.draw_outline(union_ex(new_layer.polygons, true), "black", "black", scale_(0.1f));
}
SVG::export_expolygons(debug_out_path("support-top-contacts-final0-run%d-layer%d-z%f.svg", iRun, layer_id, layer.print_z),
{ { { union_ex(lower_layer_polygons, false) }, { "lower_layer_polygons", "gray", 0.2f } },
{ { union_ex(*new_layer.contact_polygons, false) }, { "new_layer.contact_polygons", "yellow", 0.5f } },
{ { union_ex(slices_margin_cached, false) }, { "slices_margin_cached", "blue", 0.5f } },
{ { union_ex(dense_interface_polygons, false) }, { "dense_interface_polygons", "green", 0.5f } },
{ { union_ex(new_layer.polygons, true) }, { "new_layer.polygons", "red", "black", "", scaled<coord_t>(0.1f), 0.5f } } });
//support_grid_pattern.serialize(debug_out_path("support-top-contacts-final-run%d-layer%d-z%f.bin", iRun, layer_id, layer.print_z));
SVG::export_expolygons(debug_out_path("support-top-contacts-final0-run%d-layer%d-z%f.svg", iRun, layer_id, layer.print_z),
{ { { union_ex(lower_layer_polygons, false) }, { "lower_layer_polygons", "gray", 0.2f } },
{ { union_ex(*new_layer.contact_polygons, false) }, { "new_layer.contact_polygons", "yellow", 0.5f } },
{ { union_ex(contact_polygons, false) }, { "contact_polygons", "blue", 0.5f } },
{ { union_ex(dense_interface_polygons, false) }, { "dense_interface_polygons", "green", 0.5f } },
{ { union_ex(new_layer.polygons, true) }, { "new_layer.polygons", "red", "black", "", scaled<coord_t>(0.1f), 0.5f } } });
#endif /* SLIC3R_DEBUG */
}
}
#ifdef SLIC3R_DEBUG
{
BoundingBox bbox = get_extents(contact_polygons);
bbox.merge(get_extents(new_layer.polygons));
bbox.merge(get_extents(overhang_polygons));
::Slic3r::SVG svg(debug_out_path("support-top-contacts-final-run%d-layer%d-z%f.svg", iRun, layer_id, layer.print_z), bbox);
svg.draw(union_ex(lower_layer_polygons, false), "gray", 0.2f);
svg.draw(union_ex(*new_layer.contact_polygons, false), "gray", 0.5f);
svg.draw(union_ex(contact_polygons, false), "blue", 0.5f);
svg.draw(union_ex(overhang_polygons, false), "green", 0.5f);
svg.draw(union_ex(new_layer.polygons, true), "red", 0.5f);
svg.draw_outline(union_ex(new_layer.polygons, true), "black", "black", scale_(0.1f));
}
#endif /* SLIC3R_DEBUG */
SVG::export_expolygons(debug_out_path("support-top-contacts-final0-run%d-layer%d-z%f.svg", iRun, layer_id, layer.print_z),
{ { { union_ex(lower_layer_polygons, false) }, { "lower_layer_polygons", "gray", 0.2f } },
{ { union_ex(*new_layer.contact_polygons, false) }, { "new_layer.contact_polygons", "yellow", 0.5f } },
{ { union_ex(contact_polygons, false) }, { "contact_polygons", "blue", 0.5f } },
{ { union_ex(overhang_polygons, false) }, { "overhang_polygons", "green", 0.5f } },
{ { union_ex(new_layer.polygons, true) }, { "new_layer.polygons", "red", "black", "", scaled<coord_t>(0.1f), 0.5f } } });
#endif /* SLIC3R_DEBUG */
// Even after the contact layer was expanded into a grid, some of the contact islands may be too tiny to be extruded.
// Remove those tiny islands from new_layer.polygons and new_layer.contact_polygons.