diff --git a/README.markdown b/README.markdown
index 026acb5bc..93e3fa07c 100644
--- a/README.markdown
+++ b/README.markdown
@@ -168,6 +168,8 @@ The author is Alessandro Ranellucci.
Overhang threshold angle (range: 0-90, default: 45)
--support-material-pattern
Pattern to use for support material (default: rectilinear)
+ --support-material-spacing
+ Spacing between pattern lines (mm, default: 2.5)
--support-material-angle
Support material angle in degrees (range: 0-90, default: 0)
diff --git a/lib/Slic3r.pm b/lib/Slic3r.pm
index 5e908fa6c..638b18a9a 100644
--- a/lib/Slic3r.pm
+++ b/lib/Slic3r.pm
@@ -125,6 +125,7 @@ our $randomize_start = 1;
our $support_material = 0;
our $support_material_threshold = 45;
our $support_material_pattern = 'rectilinear';
+our $support_material_spacing = 2.5;
our $support_material_angle = 0;
our $support_material_tool = 0;
our $start_gcode = "G28 ; home all axes";
diff --git a/lib/Slic3r/Config.pm b/lib/Slic3r/Config.pm
index d37251ec9..0306fd703 100644
--- a/lib/Slic3r/Config.pm
+++ b/lib/Slic3r/Config.pm
@@ -296,6 +296,11 @@ our $Options = {
values => [qw(rectilinear honeycomb)],
labels => [qw(rectilinear honeycomb)],
},
+ 'support_material_spacing' => {
+ label => 'Pattern spacing (mm)',
+ cli => 'support-material-spacing=f',
+ type => 'f',
+ },
'support_material_angle' => {
label => 'Pattern angle (°)',
cli => 'support-material-angle=i',
diff --git a/lib/Slic3r/GUI/SkeinPanel.pm b/lib/Slic3r/GUI/SkeinPanel.pm
index 2d513f43f..f62067798 100644
--- a/lib/Slic3r/GUI/SkeinPanel.pm
+++ b/lib/Slic3r/GUI/SkeinPanel.pm
@@ -86,7 +86,7 @@ sub new {
},
support_material => {
title => 'Support material',
- options => [qw(support_material support_material_threshold support_material_pattern support_material_angle support_material_tool)],
+ options => [qw(support_material support_material_threshold support_material_pattern support_material_spacing support_material_angle support_material_tool)],
},
);
$self->{panels} = \%panels;
diff --git a/lib/Slic3r/Print/Object.pm b/lib/Slic3r/Print/Object.pm
index 31441170b..ea6a2b338 100644
--- a/lib/Slic3r/Print/Object.pm
+++ b/lib/Slic3r/Print/Object.pm
@@ -490,10 +490,7 @@ sub generate_support_material {
my $threshold_rad = deg2rad($Slic3r::support_material_threshold + 1); # +1 makes the threshold inclusive
my $overhang_width = $threshold_rad == 0 ? undef : scale $Slic3r::layer_height * ((cos $threshold_rad) / (sin $threshold_rad));
- my $distance_from_object = scale $Slic3r::flow->width;
- printf "width = %s\n", unscale $overhang_width;
- # determine unsupported surfaces
- my @unsupported_expolygons = ();
+ my $distance_from_object = 1.5 * scale $Slic3r::flow->width;
# determine support regions in each layer (for upper layers)
Slic3r::debugf "Detecting regions\n";
@@ -503,46 +500,36 @@ sub generate_support_material {
my @queue = (); # the number of items of this array determines the number of empty interface layers
for my $i (reverse 0 .. $#{$self->layers}) {
my $layer = $self->layers->[$i];
- my $upper_layer = $i < $#{$self->layers} ? $self->layers->[$i+1] : undef;
+ my $lower_layer = $i > 0 ? $self->layers->[$i-1] : undef;
# step 1: generate support material in current layer (for upper layers)
push @current_support_regions, @{ shift @queue } if @queue && $i < $#{$self->layers};
+
@current_support_regions = @{diff_ex(
[ map @$_, @current_support_regions ],
- [ map @$_, map $_->expolygon->offset_ex($distance_from_object), @{$layer->slices} ],
+ [ map @{$_->expolygon}, @{$layer->slices} ],
)};
- $layers{$i} = [@current_support_regions];
+ $layers{$i} = diff_ex(
+ [ map @$_, @current_support_regions ],
+ [ map @$_, map $_->expolygon->offset_ex($distance_from_object), @{$layer->slices} ],
+ );
+ $_->simplify(scale $layer->flow->spacing * 2) for @{$layers{$i}};
# step 2: get layer overhangs and put them into queue for adding support inside lower layers
# we need an angle threshold for this
my @overhangs = ();
- if ($upper_layer) {
+ if ($lower_layer) {
@overhangs = map $_->offset_ex(2 * $overhang_width), @{diff_ex(
- [ map @$_, map $_->expolygon->offset_ex(-$overhang_width), @{$upper_layer->slices} ],
- [ map @{$_->expolygon}, @{$layer->slices} ],
+ [ map @$_, map $_->expolygon->offset_ex(-$overhang_width), @{$layer->slices} ],
+ [ map @{$_->expolygon}, @{$lower_layer->slices} ],
1,
)};
}
-
- # get unsupported surfaces for current layer as all bottom slices
- # minus the bridges offsetted to cover their perimeters.
- # actually, we are marking as bridges more than we should be, so
- # better build support material for bridges too rather than ignoring
- # those parts. a visibility check algorithm is needed.
- # @overhangs = @{diff_ex(
- # [ map @$_, @overhangs ],
- # [ map @$_, map $_->expolygon->offset_ex(scale $layer->flow->spacing * $Slic3r::perimeters),
- # grep $_->surface_type == S_TYPE_BOTTOM && defined $_->bridge_angle,
- # @{$layer->fill_surfaces} ],
- # )};
- push @queue, [ map $_->clone, @overhangs ];
-
- $_->simplify(scale $layer->flow->spacing * 3) for @{ $queue[-1] };
- push @unsupported_expolygons, @{ $queue[-1] };
+ push @queue, [@overhangs];
}
}
- return if !@unsupported_expolygons;
+ return if !map @$_, values %layers;
# generate paths for the pattern that we're going to use
Slic3r::debugf "Generating patterns\n";
@@ -550,7 +537,7 @@ sub generate_support_material {
{
# 0.5 makes sure the paths don't get clipped externally when applying them to layers
my @support_material_areas = map $_->offset_ex(- 0.5 * scale $Slic3r::flow->width),
- @{union_ex([ map $_->contour, @unsupported_expolygons ])};
+ @{union_ex([ map $_->contour, map @$_, values %layers ])};
my $fill = Slic3r::Fill->new(print => $params{print});
my $filler = $fill->filler($Slic3r::support_material_pattern);
@@ -560,7 +547,7 @@ sub generate_support_material {
foreach my $expolygon (@support_material_areas) {
my @paths = $filler->fill_surface(
Slic3r::Surface->new(expolygon => $expolygon),
- density => 0.20,
+ density => $Slic3r::flow->spacing / $Slic3r::support_material_spacing,
flow_spacing => $Slic3r::flow->spacing,
);
my $params = shift @paths;
diff --git a/slic3r.pl b/slic3r.pl
index 113a301e8..06cf8ffaa 100755
--- a/slic3r.pl
+++ b/slic3r.pl
@@ -213,6 +213,8 @@ $j
Overhang threshold angle (range: 0-90, default: $Slic3r::support_material_threshold)
--support-material-pattern
Pattern to use for support material (default: $Slic3r::support_material_pattern)
+ --support-material-spacing
+ Spacing between pattern lines (mm, default: $Slic3r::support_material_spacing)
--support-material-angle
Support material angle in degrees (range: 0-90, default: $Slic3r::support_material_angle)