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|
#!/usr/bin/perl
# This script exports experimental G-code for wireframe printing
# (inspired by the brilliant WirePrint concept)
use strict;
use warnings;
BEGIN {
use FindBin;
use lib "$FindBin::Bin/../lib";
}
use Getopt::Long qw(:config no_auto_abbrev);
use Slic3r;
use Slic3r::ExtrusionPath ':roles';
use Slic3r::Geometry qw(scale unscale X Y PI);
my %opt = (
step_height => 5,
nozzle_angle => 30,
nozzle_width => 10,
first_layer_height => 0.3,
);
{
my %options = (
'help' => sub { usage() },
'output|o=s' => \$opt{output_file},
'step-height|h=f' => \$opt{step_height},
'nozzle-angle|a=f' => \$opt{nozzle_angle},
'nozzle-width|w=f' => \$opt{nozzle_width},
'first-layer-height=f' => \$opt{first_layer_height},
);
GetOptions(%options) or usage(1);
$opt{output_file} or usage(1);
$ARGV[0] or usage(1);
}
{
# load model
my $model = Slic3r::Model->read_from_file($ARGV[0]);
$model->add_default_instances;
$model->center_instances_around_point(Slic3r::Pointf->new(100,100));
my $mesh = $model->mesh;
$mesh->translate(0, 0, -$mesh->bounding_box->z_min);
# get slices
my @z = ();
my $z_max = $mesh->bounding_box->z_max;
for (my $z = $opt{first_layer_height}; $z <= $z_max; $z += $opt{step_height}) {
push @z, $z;
}
my @slices = @{$mesh->slice(\@z)};
my $flow = Slic3r::Flow->new(
width => 0.35,
height => 0.35,
nozzle_diameter => 0.35,
bridge => 1,
);
my $config = Slic3r::Config::Print->new;
$config->set('gcode_comments', 1);
open my $fh, '>', $opt{output_file};
my $gcodegen = Slic3r::GCode->new(
enable_loop_clipping => 0, # better bonding
);
$gcodegen->apply_print_config($config);
$gcodegen->set_extruders([0]);
print $fh $gcodegen->set_extruder(0);
print $fh $gcodegen->writer->preamble;
my $e = $gcodegen->writer->extruder->e_per_mm3 * $flow->mm3_per_mm;
foreach my $layer_id (0..$#z) {
my $z = $z[$layer_id];
foreach my $island (@{$slices[$layer_id]}) {
foreach my $polygon (@$island) {
if ($layer_id > 0) {
# find the lower polygon that we want to connect to this one
my $lower = $slices[$layer_id-1]->[0]->contour; # 't was easy, wasn't it?
my $lower_z = $z[$layer_id-1];
{
my @points = ();
# keep all points with strong angles
{
my @pp = @$polygon;
foreach my $i (0..$#pp) {
push @points, $pp[$i-1] if abs($pp[$i-1]->ccw_angle($pp[$i-2], $pp[$i]) - PI) > PI/3;
}
}
$polygon = Slic3r::Polygon->new(@points);
}
#$polygon = Slic3r::Polygon->new(@{$polygon->split_at_first_point->equally_spaced_points(scale $opt{nozzle_width})});
# find vertical lines
my @vertical = ();
foreach my $point (@{$polygon}) {
push @vertical, Slic3r::Line->new($point->projection_onto_polygon($lower), $point);
}
next if !@vertical;
my @points = ();
foreach my $line (@vertical) {
push @points, Slic3r::Pointf3->new(
unscale($line->a->x),
unscale($line->a->y), #))
$lower_z,
);
push @points, Slic3r::Pointf3->new(
unscale($line->b->x),
unscale($line->b->y), #))
$z,
);
}
# reappend first point as destination of the last diagonal segment
push @points, Slic3r::Pointf3->new(
unscale($vertical[0]->a->x),
unscale($vertical[0]->a->y), #))
$lower_z,
);
# move to the position of the first vertical line
print $fh $gcodegen->writer->travel_to_xyz(shift @points);
# extrude segments
foreach my $point (@points) {
print $fh $gcodegen->writer->extrude_to_xyz($point, $e * $gcodegen->writer->get_position->distance_to($point));
}
}
}
print $fh $gcodegen->writer->travel_to_z($z);
foreach my $polygon (@$island) {
#my $polyline = $polygon->split_at_vertex(Slic3r::Point->new_scale(@{$gcodegen->writer->get_position}[0,1]));
my $polyline = $polygon->split_at_first_point;
print $fh $gcodegen->writer->travel_to_xy(Slic3r::Pointf->new_unscale(@{ $polyline->first_point }), "move to first contour point");
foreach my $line (@{$polyline->lines}) {
my $point = Slic3r::Pointf->new_unscale(@{ $line->b });
print $fh $gcodegen->writer->extrude_to_xy($point, $e * unscale($line->length));
}
}
}
}
close $fh;
}
sub usage {
my ($exit_code) = @_;
print <<"EOF";
Usage: wireframe.pl [ OPTIONS ] file.stl
--help Output this usage screen and exit
--output, -o Write to the specified file
--step-height, -h Use the specified step height
--nozzle-angle, -a Max nozzle angle
--nozzle-width, -w External nozzle diameter
EOF
exit ($exit_code || 0);
}
__END__
|
