325 lines
12 KiB
Perl
325 lines
12 KiB
Perl
# The slicing work horse.
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# Extends C++ class Slic3r::Print
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package Slic3r::Print;
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use strict;
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use warnings;
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use File::Basename qw(basename fileparse);
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use File::Spec;
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use List::Util qw(min max first sum);
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use Slic3r::ExtrusionLoop ':roles';
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use Slic3r::ExtrusionPath ':roles';
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use Slic3r::Flow ':roles';
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use Slic3r::Geometry qw(X Y Z X1 Y1 X2 Y2 MIN MAX PI scale unscale convex_hull);
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use Slic3r::Geometry::Clipper qw(diff_ex union_ex intersection_ex intersection offset
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offset2 union union_pt_chained JT_ROUND JT_SQUARE);
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use Slic3r::Print::State ':steps';
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our $status_cb;
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sub set_status_cb {
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my ($class, $cb) = @_;
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$status_cb = $cb;
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}
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sub status_cb {
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return $status_cb // sub {};
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}
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sub size {
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my $self = shift;
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return $self->bounding_box->size;
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}
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# Slicing process, running at a background thread.
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sub process {
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my ($self) = @_;
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Slic3r::trace(3, "Staring the slicing process.");
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$_->make_perimeters for @{$self->objects};
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$self->status_cb->(70, "Infilling layers");
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$_->infill for @{$self->objects};
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$_->generate_support_material for @{$self->objects};
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$self->make_skirt;
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$self->make_brim; # must come after make_skirt
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# time to make some statistics
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if (0) {
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eval "use Devel::Size";
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print "MEMORY USAGE:\n";
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printf " meshes = %.1fMb\n", List::Util::sum(map Devel::Size::total_size($_->meshes), @{$self->objects})/1024/1024;
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printf " layer slices = %.1fMb\n", List::Util::sum(map Devel::Size::total_size($_->slices), map @{$_->layers}, @{$self->objects})/1024/1024;
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printf " region slices = %.1fMb\n", List::Util::sum(map Devel::Size::total_size($_->slices), map @{$_->regions}, map @{$_->layers}, @{$self->objects})/1024/1024;
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printf " perimeters = %.1fMb\n", List::Util::sum(map Devel::Size::total_size($_->perimeters), map @{$_->regions}, map @{$_->layers}, @{$self->objects})/1024/1024;
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printf " fills = %.1fMb\n", List::Util::sum(map Devel::Size::total_size($_->fills), map @{$_->regions}, map @{$_->layers}, @{$self->objects})/1024/1024;
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printf " print object = %.1fMb\n", Devel::Size::total_size($self)/1024/1024;
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}
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if (0) {
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eval "use Slic3r::Test::SectionCut";
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Slic3r::Test::SectionCut->new(print => $self)->export_svg("section_cut.svg");
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}
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Slic3r::trace(3, "Slicing process finished.")
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}
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sub export_gcode {
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my $self = shift;
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my %params = @_;
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# prerequisites
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$self->process;
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# output everything to a G-code file
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my $output_file = $self->output_filepath($params{output_file} // '');
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$self->status_cb->(90, "Exporting G-code" . ($output_file ? " to $output_file" : ""));
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{
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# open output gcode file if we weren't supplied a file-handle
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my ($fh, $tempfile);
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if ($params{output_fh}) {
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$fh = $params{output_fh};
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} else {
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$tempfile = "$output_file.tmp";
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Slic3r::open(\$fh, ">", $tempfile)
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or die "Failed to open $tempfile for writing\n";
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# enable UTF-8 output since user might have entered Unicode characters in fields like notes
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binmode $fh, ':utf8';
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}
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Slic3r::Print::GCode->new(
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print => $self,
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fh => $fh,
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)->export;
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# close our gcode file
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close $fh;
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if ($tempfile) {
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my $i;
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for ($i = 0; $i < 5; $i += 1) {
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last if (rename Slic3r::encode_path($tempfile), Slic3r::encode_path($output_file));
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# Wait for 1/4 seconds and try to rename once again.
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select(undef, undef, undef, 0.25);
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}
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Slic3r::debugf "Failed to remove the output G-code file from $tempfile to $output_file. Is $tempfile locked?\n" if ($i == 5);
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}
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}
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# run post-processing scripts
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if (@{$self->config->post_process}) {
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$self->status_cb->(95, "Running post-processing scripts");
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$self->config->setenv;
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for my $script (@{$self->config->post_process}) {
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Slic3r::debugf " '%s' '%s'\n", $script, $output_file;
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# -x doesn't return true on Windows except for .exe files
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if (($^O eq 'MSWin32') ? !(-e $script) : !(-x $script)) {
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die "The configured post-processing script is not executable: check permissions. ($script)\n";
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}
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system($script, $output_file);
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}
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}
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}
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# Export SVG slices for the offline SLA printing.
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sub export_svg {
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my $self = shift;
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my %params = @_;
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$_->slice for @{$self->objects};
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my $fh = $params{output_fh};
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if (!$fh) {
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my $output_file = $self->output_filepath($params{output_file});
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$output_file =~ s/\.gcode$/.svg/i;
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Slic3r::open(\$fh, ">", $output_file) or die "Failed to open $output_file for writing\n";
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print "Exporting to $output_file..." unless $params{quiet};
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}
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my $print_bb = $self->bounding_box;
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my $print_size = $print_bb->size;
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print $fh sprintf <<"EOF", unscale($print_size->[X]), unscale($print_size->[Y]);
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<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
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<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
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<svg width="%s" height="%s" xmlns="http://www.w3.org/2000/svg" xmlns:svg="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:slic3r="http://slic3r.org/namespaces/slic3r">
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<!--
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Generated using Slic3r $Slic3r::VERSION
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http://slic3r.org/
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-->
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EOF
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my $print_polygon = sub {
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my ($polygon, $type) = @_;
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printf $fh qq{ <polygon slic3r:type="%s" points="%s" style="fill: %s" />\n},
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$type, (join ' ', map { join ',', map unscale $_, @$_ } @$polygon),
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($type eq 'contour' ? 'white' : 'black');
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};
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my @layers = sort { $a->print_z <=> $b->print_z }
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map { @{$_->layers}, @{$_->support_layers} }
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@{$self->objects};
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my $layer_id = -1;
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my @previous_layer_slices = ();
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for my $layer (@layers) {
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$layer_id++;
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if ($layer->slice_z == -1) {
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printf $fh qq{ <g id="layer%d">\n}, $layer_id;
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} else {
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printf $fh qq{ <g id="layer%d" slic3r:z="%s">\n}, $layer_id, unscale($layer->slice_z);
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}
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my @current_layer_slices = ();
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# sort slices so that the outermost ones come first
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my @slices = sort { $a->contour->contains_point($b->contour->first_point) ? 0 : 1 } @{$layer->slices};
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foreach my $copy (@{$layer->object->_shifted_copies}) {
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foreach my $slice (@slices) {
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my $expolygon = $slice->clone;
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$expolygon->translate(@$copy);
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$expolygon->translate(-$print_bb->x_min, -$print_bb->y_min);
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$print_polygon->($expolygon->contour, 'contour');
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$print_polygon->($_, 'hole') for @{$expolygon->holes};
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push @current_layer_slices, $expolygon;
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}
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}
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# generate support material
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if ($self->has_support_material && $layer->id > 0) {
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my (@supported_slices, @unsupported_slices) = ();
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foreach my $expolygon (@current_layer_slices) {
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my $intersection = intersection_ex(
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[ map @$_, @previous_layer_slices ],
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[ @$expolygon ],
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);
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@$intersection
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? push @supported_slices, $expolygon
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: push @unsupported_slices, $expolygon;
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}
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my @supported_points = map @$_, @$_, @supported_slices;
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foreach my $expolygon (@unsupported_slices) {
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# look for the nearest point to this island among all
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# supported points
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my $contour = $expolygon->contour;
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my $support_point = $contour->first_point->nearest_point(\@supported_points)
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or next;
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my $anchor_point = $support_point->nearest_point([ @$contour ]);
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printf $fh qq{ <line x1="%s" y1="%s" x2="%s" y2="%s" style="stroke-width: 2; stroke: white" />\n},
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map @$_, $support_point, $anchor_point;
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}
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}
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print $fh qq{ </g>\n};
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@previous_layer_slices = @current_layer_slices;
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}
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print $fh "</svg>\n";
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close $fh;
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print "Done.\n" unless $params{quiet};
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}
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sub make_skirt {
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my $self = shift;
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# prerequisites
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$_->make_perimeters for @{$self->objects};
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$_->infill for @{$self->objects};
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$_->generate_support_material for @{$self->objects};
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return if $self->step_done(STEP_SKIRT);
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$self->set_step_started(STEP_SKIRT);
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# since this method must be idempotent, we clear skirt paths *before*
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# checking whether we need to generate them
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$self->skirt->clear;
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if (!$self->has_skirt) {
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$self->set_step_done(STEP_SKIRT);
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return;
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}
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$self->status_cb->(88, "Generating skirt");
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$self->_make_skirt();
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$self->set_step_done(STEP_SKIRT);
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}
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sub make_brim {
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my $self = shift;
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# prerequisites
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$_->make_perimeters for @{$self->objects};
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$_->infill for @{$self->objects};
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$_->generate_support_material for @{$self->objects};
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$self->make_skirt;
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return if $self->step_done(STEP_BRIM);
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$self->set_step_started(STEP_BRIM);
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# since this method must be idempotent, we clear brim paths *before*
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# checking whether we need to generate them
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$self->brim->clear;
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if ($self->config->brim_width == 0) {
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$self->set_step_done(STEP_BRIM);
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return;
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}
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$self->status_cb->(88, "Generating brim");
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# brim is only printed on first layer and uses perimeter extruder
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my $first_layer_height = $self->skirt_first_layer_height;
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my $flow = $self->brim_flow;
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my $mm3_per_mm = $flow->mm3_per_mm;
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my $grow_distance = $flow->scaled_width / 2;
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my @islands = (); # array of polygons
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foreach my $obj_idx (0 .. ($self->object_count - 1)) {
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my $object = $self->objects->[$obj_idx];
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my $layer0 = $object->get_layer(0);
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my @object_islands = (
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(map $_->contour, @{$layer0->slices}),
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);
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if (@{ $object->support_layers }) {
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my $support_layer0 = $object->support_layers->[0];
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push @object_islands,
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(map @{$_->polyline->grow($grow_distance)}, @{$support_layer0->support_fills})
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if $support_layer0->support_fills;
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push @object_islands,
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(map @{$_->polyline->grow($grow_distance)}, @{$support_layer0->support_interface_fills})
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if $support_layer0->support_interface_fills;
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}
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foreach my $copy (@{$object->_shifted_copies}) {
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push @islands, map { $_->translate(@$copy); $_ } map $_->clone, @object_islands;
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}
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}
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my @loops = ();
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my $num_loops = sprintf "%.0f", $self->config->brim_width / $flow->width;
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for my $i (reverse 1 .. $num_loops) {
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# JT_SQUARE ensures no vertex is outside the given offset distance
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# -0.5 because islands are not represented by their centerlines
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# (first offset more, then step back - reverse order than the one used for
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# perimeters because here we're offsetting outwards)
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push @loops, @{offset2(\@islands, ($i + 0.5) * $flow->scaled_spacing, -1.0 * $flow->scaled_spacing, JT_SQUARE)};
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}
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$self->brim->append(map Slic3r::ExtrusionLoop->new_from_paths(
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Slic3r::ExtrusionPath->new(
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polyline => Slic3r::Polygon->new(@$_)->split_at_first_point,
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role => EXTR_ROLE_SKIRT,
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mm3_per_mm => $mm3_per_mm,
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width => $flow->width,
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height => $first_layer_height,
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),
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), reverse @{union_pt_chained(\@loops)});
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$self->set_step_done(STEP_BRIM);
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}
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# Wrapper around the C++ Slic3r::Print::validate()
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# to produce a Perl exception without a hang-up on some Strawberry perls.
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sub validate
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{
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my $self = shift;
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my $err = $self->_validate;
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die $err . "\n" if (defined($err) && $err ne '');
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}
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1;
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