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