diff options
Diffstat (limited to 'lib/Slic3r/Print/Object.pm')
| -rw-r--r-- | lib/Slic3r/Print/Object.pm | 527 |
1 files changed, 1 insertions, 526 deletions
diff --git a/lib/Slic3r/Print/Object.pm b/lib/Slic3r/Print/Object.pm index 40db9ad3f..793654300 100644 --- a/lib/Slic3r/Print/Object.pm +++ b/lib/Slic3r/Print/Object.pm @@ -52,7 +52,6 @@ sub slice { die "No layers were detected. You might want to repair your STL file(s) or check their size or thickness and retry.\n" if !@{$self->layers}; - $self->set_typed_slices(0); $self->set_step_done(STEP_SLICE); } @@ -81,105 +80,7 @@ sub prepare_infill { $self->set_step_started(STEP_PREPARE_INFILL); $self->print->status_cb->(30, "Preparing infill"); - # This will assign a type (top/bottom/internal) to $layerm->slices. - # Then the classifcation of $layerm->slices is transfered onto - # the $layerm->fill_surfaces by clipping $layerm->fill_surfaces - # by the cummulative area of the previous $layerm->fill_surfaces. - $self->detect_surfaces_type; - # Mark the object to have the region slices classified (typed, which also means they are split based on whether they are supported, bridging, top layers etc.) - $self->set_typed_slices(1); - - # Decide what surfaces are to be filled. - # Here the S_TYPE_TOP / S_TYPE_BOTTOMBRIDGE / S_TYPE_BOTTOM infill is turned to just S_TYPE_INTERNAL if zero top / bottom infill layers are configured. - # Also tiny S_TYPE_INTERNAL surfaces are turned to S_TYPE_INTERNAL_SOLID. -# BOOST_LOG_TRIVIAL(info) << "Preparing fill surfaces..."; - $_->prepare_fill_surfaces for map @{$_->regions}, @{$self->layers}; - - # this will detect bridges and reverse bridges - # and rearrange top/bottom/internal surfaces - # It produces enlarged overlapping bridging areas. - # - # 1) S_TYPE_BOTTOMBRIDGE / S_TYPE_BOTTOM infill is grown by 3mm and clipped by the total infill area. Bridges are detected. The areas may overlap. - # 2) S_TYPE_TOP is grown by 3mm and clipped by the grown bottom areas. The areas may overlap. - # 3) Clip the internal surfaces by the grown top/bottom surfaces. - # 4) Merge surfaces with the same style. This will mostly get rid of the overlaps. - #FIXME This does not likely merge surfaces, which are supported by a material with different colors, but same properties. - $self->process_external_surfaces; - - # Add solid fills to ensure the shell vertical thickness. - $self->discover_vertical_shells; - - # Debugging output. - if ($SLIC3R_DEBUG_SLICE_PROCESSING) { - for my $region_id (0 .. ($self->print->region_count-1)) { - for (my $i = 0; $i < $self->layer_count; $i++) { - my $layerm = $self->get_layer($i)->regions->[$region_id]; - $layerm->export_region_slices_to_svg_debug("6_discover_vertical_shells-final"); - $layerm->export_region_fill_surfaces_to_svg_debug("6_discover_vertical_shells-final"); - } # for each layer - } # for each region - } - - # Detect, which fill surfaces are near external layers. - # They will be split in internal and internal-solid surfaces. - # The purpose is to add a configurable number of solid layers to support the TOP surfaces - # and to add a configurable number of solid layers above the BOTTOM / BOTTOMBRIDGE surfaces - # to close these surfaces reliably. - #FIXME Vojtech: Is this a good place to add supporting infills below sloping perimeters? - $self->discover_horizontal_shells; - - if ($SLIC3R_DEBUG_SLICE_PROCESSING) { - # Debugging output. - for my $region_id (0 .. ($self->print->region_count-1)) { - for (my $i = 0; $i < $self->layer_count; $i++) { - my $layerm = $self->get_layer($i)->regions->[$region_id]; - $layerm->export_region_slices_to_svg_debug("7_discover_horizontal_shells-final"); - $layerm->export_region_fill_surfaces_to_svg_debug("7_discover_horizontal_shells-final"); - } # for each layer - } # for each region - } - - # Only active if config->infill_only_where_needed. This step trims the sparse infill, - # so it acts as an internal support. It maintains all other infill types intact. - # Here the internal surfaces and perimeters have to be supported by the sparse infill. - #FIXME The surfaces are supported by a sparse infill, but the sparse infill is only as large as the area to support. - # Likely the sparse infill will not be anchored correctly, so it will not work as intended. - # Also one wishes the perimeters to be supported by a full infill. - $self->clip_fill_surfaces; - - if ($SLIC3R_DEBUG_SLICE_PROCESSING) { - # Debugging output. - for my $region_id (0 .. ($self->print->region_count-1)) { - for (my $i = 0; $i < $self->layer_count; $i++) { - my $layerm = $self->get_layer($i)->regions->[$region_id]; - $layerm->export_region_slices_to_svg_debug("8_clip_surfaces-final"); - $layerm->export_region_fill_surfaces_to_svg_debug("8_clip_surfaces-final"); - } # for each layer - } # for each region - } - - # the following step needs to be done before combination because it may need - # to remove only half of the combined infill - $self->bridge_over_infill; - - # combine fill surfaces to honor the "infill every N layers" option - $self->combine_infill; - - # Debugging output. - if ($SLIC3R_DEBUG_SLICE_PROCESSING) { - for my $region_id (0 .. ($self->print->region_count-1)) { - for (my $i = 0; $i < $self->layer_count; $i++) { - my $layerm = $self->get_layer($i)->regions->[$region_id]; - $layerm->export_region_slices_to_svg_debug("9_prepare_infill-final"); - $layerm->export_region_fill_surfaces_to_svg_debug("9_prepare_infill-final"); - } # for each layer - } # for each region - for (my $i = 0; $i < $self->layer_count; $i++) { - my $layer = $self->get_layer($i); - $layer->export_region_slices_to_svg_debug("9_prepare_infill-final"); - $layer->export_region_fill_surfaces_to_svg_debug("9_prepare_infill-final"); - } # for each layer - } + $self->_prepare_infill; $self->set_step_done(STEP_PREPARE_INFILL); } @@ -214,430 +115,4 @@ sub generate_support_material { $self->print->status_cb->(85, $stats); } -# Idempotence of this method is guaranteed by the fact that we don't remove things from -# fill_surfaces but we only turn them into VOID surfaces, thus preserving the boundaries. -sub clip_fill_surfaces { - my $self = shift; - return unless $self->config->infill_only_where_needed; - - # We only want infill under ceilings; this is almost like an - # internal support material. - - # proceed top-down skipping bottom layer - my $upper_internal = []; - for my $layer_id (reverse 1..($self->layer_count - 1)) { - my $layer = $self->get_layer($layer_id); - my $lower_layer = $self->get_layer($layer_id-1); - - # detect things that we need to support - my $overhangs = []; # Polygons - - # we need to support any solid surface - push @$overhangs, map $_->p, - grep $_->is_solid, map @{$_->fill_surfaces}, @{$layer->regions}; - - # we also need to support perimeters when there's at least one full - # unsupported loop - { - # get perimeters area as the difference between slices and fill_surfaces - my $perimeters = diff( - [ map @$_, @{$layer->slices} ], - [ map $_->p, map @{$_->fill_surfaces}, @{$layer->regions} ], - ); - - # only consider the area that is not supported by lower perimeters - $perimeters = intersection( - $perimeters, - [ map $_->p, map @{$_->fill_surfaces}, @{$lower_layer->regions} ], - 1, - ); - - # only consider perimeter areas that are at least one extrusion width thick - #FIXME Offset2 eats out from both sides, while the perimeters are create outside in. - #Should the $pw not be half of the current value? - my $pw = min(map $_->flow(FLOW_ROLE_PERIMETER)->scaled_width, @{$layer->regions}); - $perimeters = offset2($perimeters, -$pw, +$pw); - - # append such thick perimeters to the areas that need support - push @$overhangs, @$perimeters; - } - - # find new internal infill - $upper_internal = my $new_internal = intersection( - [ - @$overhangs, - @$upper_internal, - ], - [ - # our current internal fill boundaries - map $_->p, - grep $_->surface_type == S_TYPE_INTERNAL || $_->surface_type == S_TYPE_INTERNALVOID, - map @{$_->fill_surfaces}, @{$lower_layer->regions} - ], - ); - - # apply new internal infill to regions - foreach my $layerm (@{$lower_layer->regions}) { - my (@internal, @other) = (); - foreach my $surface (map $_->clone, @{$layerm->fill_surfaces}) { - if ($surface->surface_type == S_TYPE_INTERNAL || $surface->surface_type == S_TYPE_INTERNALVOID) { - push @internal, $surface; - } else { - push @other, $surface; - } - } - - my @new = map Slic3r::Surface->new( - expolygon => $_, - surface_type => S_TYPE_INTERNAL, - ), - @{intersection_ex( - [ map $_->p, @internal ], - $new_internal, - 1, - )}; - - push @other, map Slic3r::Surface->new( - expolygon => $_, - surface_type => S_TYPE_INTERNALVOID, - ), - @{diff_ex( - [ map $_->p, @internal ], - $new_internal, - 1, - )}; - - # If there are voids it means that our internal infill is not adjacent to - # perimeters. In this case it would be nice to add a loop around infill to - # make it more robust and nicer. TODO. - - $layerm->fill_surfaces->clear; - $layerm->fill_surfaces->append($_) for (@new, @other); - - if ($SLIC3R_DEBUG_SLICE_PROCESSING) { - $layerm->export_region_fill_surfaces_to_svg_debug("6_clip_fill_surfaces"); - } - } - } -} - -sub discover_horizontal_shells { - my $self = shift; - - Slic3r::debugf "==> DISCOVERING HORIZONTAL SHELLS\n"; - - for my $region_id (0 .. ($self->print->region_count-1)) { - for (my $i = 0; $i < $self->layer_count; $i++) { - my $layerm = $self->get_layer($i)->regions->[$region_id]; - - if ($layerm->region->config->solid_infill_every_layers && $layerm->region->config->fill_density > 0 - && ($i % $layerm->region->config->solid_infill_every_layers) == 0) { - # This is the layer to put the sparse infill in. Mark S_TYPE_INTERNAL surfaces as S_TYPE_INTERNALSOLID or S_TYPE_INTERNALBRIDGE. - # If the sparse infill is not active, the internal surfaces are of type S_TYPE_INTERNAL. - my $type = $layerm->region->config->fill_density == 100 ? S_TYPE_INTERNALSOLID : S_TYPE_INTERNALBRIDGE; - $_->surface_type($type) for @{$layerm->fill_surfaces->filter_by_type(S_TYPE_INTERNAL)}; - } - - # If ensure_vertical_shell_thickness, then the rest has already been performed by discover_vertical_shells(). - next if ($layerm->region->config->ensure_vertical_shell_thickness); - - EXTERNAL: foreach my $type (S_TYPE_TOP, S_TYPE_BOTTOM, S_TYPE_BOTTOMBRIDGE) { - # find slices of current type for current layer - # use slices instead of fill_surfaces because they also include the perimeter area - # which needs to be propagated in shells; we need to grow slices like we did for - # fill_surfaces though. Using both ungrown slices and grown fill_surfaces will - # not work in some situations, as there won't be any grown region in the perimeter - # area (this was seen in a model where the top layer had one extra perimeter, thus - # its fill_surfaces were thinner than the lower layer's infill), however it's the best - # solution so far. Growing the external slices by EXTERNAL_INFILL_MARGIN will put - # too much solid infill inside nearly-vertical slopes. - my $solid = [ - # Surfaces including the area of perimeters. Everything, that is visible from the top / bottom - # (not covered by a layer above / below). - # This does not contain the areas covered by perimeters! - (map $_->p, @{$layerm->slices->filter_by_type($type)}), - # Infill areas (slices without the perimeters). - (map $_->p, @{$layerm->fill_surfaces->filter_by_type($type)}), - ]; - next if !@$solid; - Slic3r::debugf "Layer %d has %s surfaces\n", $i, ($type == S_TYPE_TOP) ? 'top' : 'bottom'; - - my $solid_layers = ($type == S_TYPE_TOP) - ? $layerm->region->config->top_solid_layers - : $layerm->region->config->bottom_solid_layers; - NEIGHBOR: for (my $n = ($type == S_TYPE_TOP) ? $i-1 : $i+1; - abs($n - $i) < $solid_layers; - ($type == S_TYPE_TOP) ? $n-- : $n++) { - - next if $n < 0 || $n >= $self->layer_count; - Slic3r::debugf " looking for neighbors on layer %d...\n", $n; - - # Reference to the lower layer of a TOP surface, or an upper layer of a BOTTOM surface. - my $neighbor_layerm = $self->get_layer($n)->regions->[$region_id]; - # Reference to the neighbour fill surfaces. - my $neighbor_fill_surfaces = $neighbor_layerm->fill_surfaces; - # Clone because we will use these surfaces even after clearing the collection. - my @neighbor_fill_surfaces = map $_->clone, @$neighbor_fill_surfaces; - - # find intersection between neighbor and current layer's surfaces - # intersections have contours and holes - # we update $solid so that we limit the next neighbor layer to the areas that were - # found on this one - in other words, solid shells on one layer (for a given external surface) - # are always a subset of the shells found on the previous shell layer - # this approach allows for DWIM in hollow sloping vases, where we want bottom - # shells to be generated in the base but not in the walls (where there are many - # narrow bottom surfaces): reassigning $solid will consider the 'shadow' of the - # upper perimeter as an obstacle and shell will not be propagated to more upper layers - #FIXME How does it work for S_TYPE_INTERNALBRIDGE? This is set for sparse infill. Likely this does not work. - my $new_internal_solid = $solid = intersection( - $solid, - [ map $_->p, grep { ($_->surface_type == S_TYPE_INTERNAL) || ($_->surface_type == S_TYPE_INTERNALSOLID) } @neighbor_fill_surfaces ], - 1, - ); - next EXTERNAL if !@$new_internal_solid; - - if ($layerm->region->config->fill_density == 0) { - # 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!) - my $margin = $neighbor_layerm->flow(FLOW_ROLE_EXTERNAL_PERIMETER)->scaled_width; - my $regularized = offset2($new_internal_solid, -$margin, +$margin, JT_MITER, 5); - my $too_narrow = diff( - $new_internal_solid, - $regularized, - 1, - ); - # Trim the regularized region by the original region. - $new_internal_solid = $solid = intersection( - $new_internal_solid, - $regularized, - ) if @$too_narrow; - } - - # make sure the new internal solid is wide enough, as it might get collapsed - # when spacing is added in Fill.pm - if ($layerm->region->config->ensure_vertical_shell_thickness) { - # The possible thin sickles of top / bottom surfaces on steeply sloping surfaces touch - # the projections of top / bottom perimeters, therefore they will be sufficiently inflated by - # merging them with the projections of the top / bottom perimeters. - } else { - #FIXME Vojtech: Disable this and you will be sorry. - # https://github.com/prusa3d/Slic3r/issues/26 bottom - my $margin = 3 * $layerm->flow(FLOW_ROLE_SOLID_INFILL)->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 - # would have a different shape from the external surface and we'd still - # have the same angle, so the next shell would be grown even more and so on. - my $too_narrow = diff( - $new_internal_solid, - offset2($new_internal_solid, -$margin, +$margin, JT_MITER, 5), - 1, - ); - - if (@$too_narrow) { - # grow the collapsing parts and add the extra area to the neighbor layer - # as well as to our original surfaces so that we support this - # additional area in the next shell too - - # make sure our grown surfaces don't exceed the fill area - my @grown = @{intersection( - offset($too_narrow, +$margin), - # Discard bridges as they are grown for anchoring and we can't - # remove such anchors. (This may happen when a bridge is being - # anchored onto a wall where little space remains after the bridge - # is grown, and that little space is an internal solid shell so - # it triggers this too_narrow logic.) - [ map $_->p, grep { $_->is_internal && !$_->is_bridge } @neighbor_fill_surfaces ], - )}; - $new_internal_solid = $solid = [ @grown, @$new_internal_solid ]; - } - } - - # internal-solid are the union of the existing internal-solid surfaces - # and new ones - my $internal_solid = union_ex([ - ( map $_->p, grep $_->surface_type == S_TYPE_INTERNALSOLID, @neighbor_fill_surfaces ), - @$new_internal_solid, - ]); - - # subtract intersections from layer surfaces to get resulting internal surfaces - my $internal = diff_ex( - [ map $_->p, grep $_->surface_type == S_TYPE_INTERNAL, @neighbor_fill_surfaces ], - [ map @$_, @$internal_solid ], - 1, - ); - Slic3r::debugf " %d internal-solid and %d internal surfaces found\n", - scalar(@$internal_solid), scalar(@$internal); - - # assign resulting internal surfaces to layer - $neighbor_fill_surfaces->clear; - $neighbor_fill_surfaces->append($_) - for map Slic3r::Surface->new(expolygon => $_, surface_type => S_TYPE_INTERNAL), - @$internal; - - # assign new internal-solid surfaces to layer - $neighbor_fill_surfaces->append($_) - for map Slic3r::Surface->new(expolygon => $_, surface_type => S_TYPE_INTERNALSOLID), - @$internal_solid; - - # assign top and bottom surfaces to layer - foreach my $s (@{Slic3r::Surface::Collection->new(grep { ($_->surface_type == S_TYPE_TOP) || $_->is_bottom } @neighbor_fill_surfaces)->group}) { - my $solid_surfaces = diff_ex( - [ map $_->p, @$s ], - [ map @$_, @$internal_solid, @$internal ], - 1, - ); - $neighbor_fill_surfaces->append($_) - for map $s->[0]->clone(expolygon => $_), @$solid_surfaces; - } - } - } # foreach my $type (S_TYPE_TOP, S_TYPE_BOTTOM, S_TYPE_BOTTOMBRIDGE) - } # for each layer - } # for each region - - # Debugging output. - if ($SLIC3R_DEBUG_SLICE_PROCESSING) { - for my $region_id (0 .. ($self->print->region_count-1)) { - for (my $i = 0; $i < $self->layer_count; $i++) { - my $layerm = $self->get_layer($i)->regions->[$region_id]; - $layerm->export_region_slices_to_svg_debug("5_discover_horizontal_shells"); - $layerm->export_region_fill_surfaces_to_svg_debug("5_discover_horizontal_shells"); - } # for each layer - } # for each region - } -} - -# combine fill surfaces across layers to honor the "infill every N layers" option -# Idempotence of this method is guaranteed by the fact that we don't remove things from -# fill_surfaces but we only turn them into VOID surfaces, thus preserving the boundaries. -sub combine_infill { - my $self = shift; - - # define the type used for voids - my %voidtype = ( - &S_TYPE_INTERNAL() => S_TYPE_INTERNALVOID, - ); - - # work on each region separately - for my $region_id (0 .. ($self->print->region_count-1)) { - my $region = $self->print->get_region($region_id); - my $every = $region->config->infill_every_layers; - next unless $every > 1 && $region->config->fill_density > 0; - - # limit the number of combined layers to the maximum height allowed by this regions' nozzle - my $nozzle_diameter = min( - $self->print->config->get_at('nozzle_diameter', $region->config->infill_extruder-1), - $self->print->config->get_at('nozzle_diameter', $region->config->solid_infill_extruder-1), - ); - - # define the combinations - my %combine = (); # layer_idx => number of additional combined lower layers - { - my $current_height = my $layers = 0; - for my $layer_idx (0 .. ($self->layer_count-1)) { - my $layer = $self->get_layer($layer_idx); - next if $layer->id == 0; # skip first print layer (which may not be first layer in array because of raft) - my $height = $layer->height; - - # check whether the combination of this layer with the lower layers' buffer - # would exceed max layer height or max combined layer count - if ($current_height + $height >= $nozzle_diameter + epsilon || $layers >= $every) { - # append combination to lower layer - $combine{$layer_idx-1} = $layers; - $current_height = $layers = 0; - } - - $current_height += $height; - $layers++; - } - - # append lower layers (if any) to uppermost layer - $combine{$self->layer_count-1} = $layers; - } - - # loop through layers to which we have assigned layers to combine - for my $layer_idx (sort keys %combine) { - next unless $combine{$layer_idx} > 1; - - # get all the LayerRegion objects to be combined - my @layerms = map $self->get_layer($_)->get_region($region_id), - ($layer_idx - ($combine{$layer_idx}-1) .. $layer_idx); - - # only combine internal infill - for my $type (S_TYPE_INTERNAL) { - # we need to perform a multi-layer intersection, so let's split it in pairs - - # initialize the intersection with the candidates of the lowest layer - my $intersection = [ map $_->expolygon, @{$layerms[0]->fill_surfaces->filter_by_type($type)} ]; - - # start looping from the second layer and intersect the current intersection with it - for my $layerm (@layerms[1 .. $#layerms]) { - $intersection = intersection_ex( - [ map @$_, @$intersection ], - [ map @{$_->expolygon}, @{$layerm->fill_surfaces->filter_by_type($type)} ], - ); - } - - my $area_threshold = $layerms[0]->infill_area_threshold; - @$intersection = grep $_->area > $area_threshold, @$intersection; - next if !@$intersection; - Slic3r::debugf " combining %d %s regions from layers %d-%d\n", - scalar(@$intersection), - ($type == S_TYPE_INTERNAL ? 'internal' : 'internal-solid'), - $layer_idx-($every-1), $layer_idx; - - # $intersection now contains the regions that can be combined across the full amount of layers - # so let's remove those areas from all layers - - my @intersection_with_clearance = map @{$_->offset( - $layerms[-1]->flow(FLOW_ROLE_SOLID_INFILL)->scaled_width / 2 - + $layerms[-1]->flow(FLOW_ROLE_PERIMETER)->scaled_width / 2 - # Because fill areas for rectilinear and honeycomb are grown - # later to overlap perimeters, we need to counteract that too. - + (($type == S_TYPE_INTERNALSOLID || $region->config->fill_pattern =~ /(rectilinear|grid|line|honeycomb)/) - ? $layerms[-1]->flow(FLOW_ROLE_SOLID_INFILL)->scaled_width - : 0) - )}, @$intersection; - - - foreach my $layerm (@layerms) { - my @this_type = @{$layerm->fill_surfaces->filter_by_type($type)}; - my @other_types = map $_->clone, grep $_->surface_type != $type, @{$layerm->fill_surfaces}; - - my @new_this_type = map Slic3r::Surface->new(expolygon => $_, surface_type => $type), - @{diff_ex( - [ map $_->p, @this_type ], - [ @intersection_with_clearance ], - )}; - - # apply surfaces back with adjusted depth to the uppermost layer - if ($layerm->layer->id == $self->get_layer($layer_idx)->id) { - push @new_this_type, - map Slic3r::Surface->new( - expolygon => $_, - surface_type => $type, - thickness => sum(map $_->layer->height, @layerms), - thickness_layers => scalar(@layerms), - ), - @$intersection; - } else { - # save void surfaces - push @new_this_type, - map Slic3r::Surface->new(expolygon => $_, surface_type => $voidtype{$type}), - @{intersection_ex( - [ map @{$_->expolygon}, @this_type ], - [ @intersection_with_clearance ], - )}; - } - - $layerm->fill_surfaces->clear; - $layerm->fill_surfaces->append($_) for (@new_this_type, @other_types); - } - } - } - } -} - 1; |