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package Slic3r::Extruder;
use Moo;
has 'shift_x' => (is => 'ro', default => sub {0} );
has 'shift_y' => (is => 'ro', default => sub {0} );
has 'z' => (is => 'rw', default => sub {0} );
has 'flow_ratio' => (is => 'rw', default => sub {1});
has 'extrusion_distance' => (is => 'rw', default => sub {0} );
has 'retracted' => (is => 'rw', default => sub {1} ); # this spits out some plastic at start
has 'lifted' => (is => 'rw', default => sub {0} );
has 'last_pos' => (is => 'rw', default => sub { [0,0] } );
has 'last_f' => (is => 'rw', default => sub {0});
has 'dec' => (is => 'ro', default => sub { 3 } );
# calculate speeds
has 'travel_feed_rate' => (
is => 'ro',
default => sub { $Slic3r::travel_feed_rate * 60 }, # mm/min
);
has 'print_feed_rate' => (
is => 'ro',
default => sub { $Slic3r::print_feed_rate * 60 }, # mm/min
);
has 'perimeter_feed_rate' => (
is => 'ro',
default => sub { $Slic3r::perimeter_feed_rate * 60 }, # mm/min
);
has 'retract_speed' => (
is => 'ro',
default => sub { $Slic3r::retract_speed * 60 }, # mm/min
);
use Slic3r::Geometry qw(points_coincide);
use XXX;
use constant PI => 4 * atan2(1, 1);
use constant X => 0;
use constant Y => 1;
sub move_z {
my $self = shift;
my ($z) = @_;
my $gcode = "";
$gcode .= $self->retract(dont_lift => 1);
$gcode .= $self->G1(undef, $z, 0, 'move to next layer');
return $gcode;
}
sub extrude_loop {
my $self = shift;
my ($loop, $description) = @_;
# find the point of the loop that is closest to the current extruder position
my $start_at = $loop->nearest_point_to($self->last_pos);
# split the loop at the starting point and make a path
my $extrusion_path = $loop->split_at($start_at);
# clip the path to avoid the extruder to get exactly on the first point of the loop
$extrusion_path->clip_end($Slic3r::flow_width / $Slic3r::resolution);
# extrude along the path
return $self->extrude($extrusion_path, $description);
}
sub extrude {
my $self = shift;
my ($path, $description, $recursive) = @_;
$path->merge_continuous_lines;
# detect arcs
if ($Slic3r::gcode_arcs && !$recursive) {
my $gcode = "";
$gcode .= $self->extrude($_, $description, 1) for $path->detect_arcs;
return $gcode;
}
my $gcode = "";
# retract if distance from previous position is greater or equal to the one
# specified by the user *and* to the maximum distance between infill lines
my $distance_from_last_pos = Slic3r::Geometry::distance_between_points($self->last_pos, $path->points->[0]) * $Slic3r::resolution;
if ($distance_from_last_pos >= $Slic3r::retract_before_travel
&& ($Slic3r::fill_density == 0 || $distance_from_last_pos >= $Slic3r::flow_width / $Slic3r::fill_density * sqrt(2))) {
$gcode .= $self->retract;
}
# go to first point of extrusion path
$gcode .= $self->G1($path->points->[0], undef, 0, "move to first $description point")
if !points_coincide($self->last_pos, $path->points->[0]);
# compensate retraction
$gcode .= $self->unretract if $self->retracted;
# calculate extrusion length per distance unit
my $e = $Slic3r::resolution
* (($Slic3r::nozzle_diameter**2) / ($Slic3r::filament_diameter ** 2))
* $Slic3r::thickness_ratio
* $self->flow_ratio
* $Slic3r::filament_packing_density
* $path->depth_layers;
# extrude arc or line
if ($path->isa('Slic3r::ExtrusionPath::Arc')) {
$gcode .= $self->G2_G3($path->points->[-1], $path->orientation,
$path->center, $e * $path->length, $description);
} else {
foreach my $line ($path->lines) {
$gcode .= $self->G1($line->b, undef, $e * $line->length, $description);
}
}
return $gcode;
}
sub retract {
my $self = shift;
my %params = @_;
return "" unless $Slic3r::retract_length > 0
&& !$self->retracted;
$self->retracted(1);
my $gcode = $self->G1(undef, undef, -$Slic3r::retract_length, "retract");
unless ($params{dont_lift} || $Slic3r::retract_lift == 0) {
$gcode .= $self->G1(undef, $self->z + $Slic3r::retract_lift, 0, 'lift plate during retraction');
$self->lifted(1);
}
# reset extrusion distance during retracts
# this makes sure we leave sufficient precision in the firmware
if (!$Slic3r::use_relative_e_distances) {
$gcode .= "G92 E0\n";
$self->extrusion_distance(0);
}
return $gcode;
}
sub unretract {
my $self = shift;
$self->retracted(0);
my $gcode = "";
if ($self->lifted) {
$gcode .= $self->G1(undef, $self->z - $Slic3r::retract_lift, 0, 'restore layer Z');
$self->lifted(0);
}
$gcode .= $self->G1(undef, undef, ($Slic3r::retract_length + $Slic3r::retract_restart_extra),
"compensate retraction");
return $gcode;
}
sub G1 {
my $self = shift;
my ($point, $z, $e, $comment) = @_;
my $dec = $self->dec;
my $gcode = "G1";
if ($point) {
$gcode .= sprintf " X%.${dec}f Y%.${dec}f",
($point->x * $Slic3r::resolution) + $self->shift_x,
($point->y * $Slic3r::resolution) + $self->shift_y; #**
$self->last_pos($point);
}
if (defined $z && $z != $self->z) {
$self->z($z);
$gcode .= sprintf " Z%.${dec}f", $z;
}
return $self->_Gx($gcode, $e, $comment);
}
sub G2_G3 {
my $self = shift;
my ($point, $orientation, $center, $e, $comment) = @_;
my $dec = $self->dec;
my $gcode = $orientation eq 'cw' ? "G2" : "G3";
$gcode .= sprintf " X%.${dec}f Y%.${dec}f",
($point->x * $Slic3r::resolution) + $self->shift_x,
($point->y * $Slic3r::resolution) + $self->shift_y; #**
# XY distance of the center from the start position
$gcode .= sprintf " I%.${dec}f J%.${dec}f",
($center->[X] - $self->last_pos->[X]) * $Slic3r::resolution,
($center->[Y] - $self->last_pos->[Y]) * $Slic3r::resolution;
$self->last_pos($point);
return $self->_Gx($gcode, $e, $comment);
}
sub _Gx {
my $self = shift;
my ($gcode, $e, $comment) = @_;
my $dec = $self->dec;
# apply the speed reduction for print moves on bottom layer
my $speed_multiplier = $e && $self->z == $Slic3r::z_offset
? $Slic3r::bottom_layer_speed_ratio
: 1;
# determine speed
my $speed = $self->travel_feed_rate * $speed_multiplier;
if ($e) {
$speed = $self->print_feed_rate * $speed_multiplier;
$speed = $self->retract_speed if $comment =~ /retract/;
$speed = $self->perimeter_feed_rate * $speed_multiplier if $comment =~ /perimeter/;
}
# output speed if it's different from last one used
# (goal: reduce gcode size)
if ($speed != $self->last_f) {
$gcode .= sprintf " F%.${dec}f", $speed;
$self->last_f($speed);
}
# output extrusion distance
if ($e) {
$self->extrusion_distance(0) if $Slic3r::use_relative_e_distances;
$self->extrusion_distance($self->extrusion_distance + $e);
$gcode .= sprintf " E%.5f", $self->extrusion_distance;
}
$gcode .= sprintf " ; %s", $comment if $comment;
return "$gcode\n";
}
1;
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