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Fix an issue that only 1 bottom/top will be generated when ensure vertical thickness is set to None (#4504)

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SoftFever 2024-03-16 00:24:57 +08:00 • committed by GitHub
parent 630262689e
commit 1471ac4204
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3 changed files with 18 additions and 12 deletions
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26
src/libslic3r/PrintObject.cpp
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@ -3184,7 +3184,7 @@ void PrintObject::discover_horizontal_shells()
#endif
// If ensure_vertical_shell_thickness, then the rest has already been performed by discover_vertical_shells().
if (region_config.ensure_vertical_shell_thickness.value == evstAll || region_config.ensure_vertical_shell_thickness.value == vsNone)
if (region_config.ensure_vertical_shell_thickness.value == evstAll)
continue;
coordf_t print_z = layer->print_z;
@ -3258,7 +3258,7 @@ void PrintObject::discover_horizontal_shells()
// Orca: Also use the same strategy if the user has selected to further reduce
// the amount of solid infill on walls.
if (region_config.sparse_infill_density.value == 0 || region_config.ensure_vertical_shell_thickness.value == evstCriticalOnly) {
if (region_config.sparse_infill_density.value == 0 || region_config.ensure_vertical_shell_thickness.value == evstCriticalOnly || region_config.ensure_vertical_shell_thickness.value == evstNone) {
// If user expects the object to be void (for example a hollow sloping vase),
// don't continue the search. In this case, we only generate the external solid
// shell if the object would otherwise show a hole (gap between perimeters of
@ -3271,24 +3271,30 @@ void PrintObject::discover_horizontal_shells()
}
}
if (region_config.sparse_infill_density.value == 0 || region_config.ensure_vertical_shell_thickness.value == evstCriticalOnly) {
float factor = 0.0f;
if (region_config.sparse_infill_density.value == 0)
factor = 1.0f;
else if (region_config.ensure_vertical_shell_thickness.value == evstNone)
factor = 0.5f;
else if (region_config.ensure_vertical_shell_thickness.value == evstCriticalOnly)
factor = 0.2f;
if (factor > 0.0f) {
// if we're printing a hollow object we discard any solid shell thinner
// than a perimeter width, since it's probably just crossing a sloping wall
// and it's not wanted in a hollow print even if it would make sense when
// obeying the solid shell count option strictly (DWIM!)
// Orca: Also use the same strategy if the user has selected to reduce
// the amount of solid infill on walls. However reduce the margin to 20% overhang
// as we want to generate infill on sloped vertical surfaces but still keep a small amount of
// filtering. This is an arbitrary value to make this option safe
// by ensuring that top surfaces, especially slanted ones dont go **completely** unsupported
// especially when using single perimeter top layers.
float margin = region_config.ensure_vertical_shell_thickness.value == evstCriticalOnly? float(neighbor_layerm->flow(frExternalPerimeter).scaled_width()) * 0.2f : float(neighbor_layerm->flow(frExternalPerimeter).scaled_width());
Polygons too_narrow = diff(
new_internal_solid,
opening(new_internal_solid, margin, margin + ClipperSafetyOffset, jtMiter, 5));
float margin = float(neighbor_layerm->flow(frExternalPerimeter).scaled_width()) * factor;
Polygons too_narrow = diff(new_internal_solid,
opening(new_internal_solid, margin, margin + ClipperSafetyOffset, jtMiter, 5));
// Trim the regularized region by the original region.
if (! too_narrow.empty())
if (!too_narrow.empty())
new_internal_solid = solid = diff(new_internal_solid, too_narrow);
}
@ -3296,7 +3302,7 @@ void PrintObject::discover_horizontal_shells()
// when spacing is added in Fill.pm
{
//FIXME Vojtech: Disable this and you will be sorry.
float margin = 3.f * layerm->flow(frSolidInfill).scaled_width(); // require at least this size
float margin = (region_config.ensure_vertical_shell_thickness.value != evstNone ? 3.f : 1.0f) * layerm->flow(frSolidInfill).scaled_width(); // require at least this size
// we use a higher miterLimit here to handle areas with acute angles
// in those cases, the default miterLimit would cut the corner and we'd
// get a triangle in $too_narrow; if we grow it below then the shell