237 lines
8.0 KiB
Perl
237 lines
8.0 KiB
Perl
package Slic3r::ExtrusionPath;
|
|
use strict;
|
|
use warnings;
|
|
|
|
use parent qw(Exporter);
|
|
|
|
our @EXPORT_OK = qw(EXTR_ROLE_PERIMETER EXTR_ROLE_EXTERNAL_PERIMETER
|
|
EXTR_ROLE_CONTOUR_INTERNAL_PERIMETER EXTR_ROLE_OVERHANG_PERIMETER
|
|
EXTR_ROLE_FILL EXTR_ROLE_SOLIDFILL EXTR_ROLE_TOPSOLIDFILL EXTR_ROLE_BRIDGE
|
|
EXTR_ROLE_INTERNALBRIDGE EXTR_ROLE_SKIRT EXTR_ROLE_SUPPORTMATERIAL EXTR_ROLE_GAPFILL);
|
|
our %EXPORT_TAGS = (roles => \@EXPORT_OK);
|
|
|
|
use Slic3r::Geometry qw(PI X Y epsilon deg2rad rotate_points);
|
|
|
|
sub clip_with_polygon {
|
|
my $self = shift;
|
|
my ($polygon) = @_;
|
|
|
|
return $self->clip_with_expolygon(Slic3r::ExPolygon->new($polygon));
|
|
}
|
|
|
|
sub clip_with_expolygon {
|
|
my $self = shift;
|
|
my ($expolygon) = @_;
|
|
|
|
return map $self->clone(polyline => $_),
|
|
$self->polyline->clip_with_expolygon($expolygon);
|
|
}
|
|
|
|
sub intersect_expolygons {
|
|
my $self = shift;
|
|
my ($expolygons) = @_;
|
|
|
|
return map $self->clone(polyline => Slic3r::Polyline->new(@$_)),
|
|
@{Boost::Geometry::Utils::multi_polygon_multi_linestring_intersection([ map $_->pp, @$expolygons ], [$self->pp])};
|
|
}
|
|
|
|
sub subtract_expolygons {
|
|
my $self = shift;
|
|
my ($expolygons) = @_;
|
|
|
|
return map $self->clone(polyline => Slic3r::Polyline->new(@$_)),
|
|
@{Boost::Geometry::Utils::multi_linestring_multi_polygon_difference([$self->pp], [ map $_->pp, @$expolygons ])};
|
|
}
|
|
|
|
sub simplify {
|
|
my $self = shift;
|
|
$self->polyline($self->polyline->simplify(@_));
|
|
}
|
|
|
|
sub clip_end {
|
|
my $self = shift;
|
|
my $polyline = $self->polyline;
|
|
$polyline->clip_end(@_);
|
|
$self->polyline($polyline);
|
|
}
|
|
|
|
sub length {
|
|
my $self = shift;
|
|
return $self->polyline->length;
|
|
}
|
|
|
|
sub points {
|
|
my $self = shift;
|
|
return $self->polyline;
|
|
}
|
|
|
|
sub is_perimeter {
|
|
my $self = shift;
|
|
return $self->role == EXTR_ROLE_PERIMETER
|
|
|| $self->role == EXTR_ROLE_EXTERNAL_PERIMETER
|
|
|| $self->role == EXTR_ROLE_OVERHANG_PERIMETER
|
|
|| $self->role == EXTR_ROLE_CONTOUR_INTERNAL_PERIMETER;
|
|
}
|
|
|
|
sub is_fill {
|
|
my $self = shift;
|
|
return $self->role == EXTR_ROLE_FILL
|
|
|| $self->role == EXTR_ROLE_SOLIDFILL
|
|
|| $self->role == EXTR_ROLE_TOPSOLIDFILL;
|
|
}
|
|
|
|
sub is_bridge {
|
|
my $self = shift;
|
|
return $self->role == EXTR_ROLE_BRIDGE
|
|
|| $self->role == EXTR_ROLE_INTERNALBRIDGE
|
|
|| $self->role == EXTR_ROLE_OVERHANG_PERIMETER;
|
|
}
|
|
|
|
sub split_at_acute_angles {
|
|
my $self = shift;
|
|
|
|
# calculate angle limit
|
|
my $angle_limit = abs(Slic3r::Geometry::deg2rad(40));
|
|
my @points = @{$self->p};
|
|
|
|
my @paths = ();
|
|
|
|
# take first two points
|
|
my @p = splice @points, 0, 2;
|
|
|
|
# loop until we have one spare point
|
|
while (my $p3 = shift @points) {
|
|
my $angle = abs(Slic3r::Geometry::angle3points($p[-1], $p[-2], $p3));
|
|
$angle = 2*PI - $angle if $angle > PI;
|
|
|
|
if ($angle < $angle_limit) {
|
|
# if the angle between $p[-2], $p[-1], $p3 is too acute
|
|
# then consider $p3 only as a starting point of a new
|
|
# path and stop the current one as it is
|
|
push @paths, $self->clone(polyline => Slic3r::Polyline->new(@p));
|
|
@p = ($p3);
|
|
push @p, grep $_, shift @points or last;
|
|
} else {
|
|
push @p, $p3;
|
|
}
|
|
}
|
|
push @paths, $self->clone(polyline => Slic3r::Polyline->new(@p))
|
|
if @p > 1;
|
|
|
|
return @paths;
|
|
}
|
|
|
|
sub detect_arcs {
|
|
my $self = shift;
|
|
my ($max_angle, $len_epsilon) = @_;
|
|
|
|
$max_angle = deg2rad($max_angle || 15);
|
|
$len_epsilon ||= 10 / &Slic3r::SCALING_FACTOR;
|
|
my $parallel_degrees_limit = abs(Slic3r::Geometry::deg2rad(3));
|
|
|
|
my @points = @{$self->points};
|
|
my @paths = ();
|
|
|
|
# we require at least 3 consecutive segments to form an arc
|
|
CYCLE: while (@points >= 4) {
|
|
POINT: for (my $i = 0; $i <= $#points - 3; $i++) {
|
|
my $s1 = Slic3r::Line->new($points[$i], $points[$i+1]);
|
|
my $s2 = Slic3r::Line->new($points[$i+1], $points[$i+2]);
|
|
my $s3 = Slic3r::Line->new($points[$i+2], $points[$i+3]);
|
|
my $s1_len = $s1->length;
|
|
my $s2_len = $s2->length;
|
|
my $s3_len = $s3->length;
|
|
|
|
# segments must have the same length
|
|
if (abs($s3_len - $s2_len) > $len_epsilon) {
|
|
# optimization: skip a cycle
|
|
$i++;
|
|
next;
|
|
}
|
|
next if abs($s2_len - $s1_len) > $len_epsilon;
|
|
|
|
# segments must have the same relative angle
|
|
my $s1_angle = $s1->atan;
|
|
my $s2_angle = $s2->atan;
|
|
my $s3_angle = $s3->atan;
|
|
$s1_angle += 2*PI if $s1_angle < 0;
|
|
$s2_angle += 2*PI if $s2_angle < 0;
|
|
$s3_angle += 2*PI if $s3_angle < 0;
|
|
my $s1s2_angle = $s2_angle - $s1_angle;
|
|
my $s2s3_angle = $s3_angle - $s2_angle;
|
|
next if abs($s1s2_angle - $s2s3_angle) > $parallel_degrees_limit;
|
|
next if abs($s1s2_angle) < $parallel_degrees_limit; # ignore parallel lines
|
|
next if $s1s2_angle > $max_angle; # ignore too sharp vertices
|
|
my @arc_points = ($points[$i], $points[$i+3]), # first and last points
|
|
|
|
# now look for more points
|
|
my $last_line_angle = $s3_angle;
|
|
my $last_j = $i+3;
|
|
for (my $j = $i+3; $j < $#points; $j++) {
|
|
my $line = Slic3r::Line->new($points[$j], $points[$j+1]);
|
|
last if abs($line->length - $s1_len) > $len_epsilon;
|
|
my $line_angle = $line->atan;
|
|
$line_angle += 2*PI if $line_angle < 0;
|
|
my $anglediff = $line_angle - $last_line_angle;
|
|
last if abs($s1s2_angle - $anglediff) > $parallel_degrees_limit;
|
|
|
|
# point $j+1 belongs to the arc
|
|
$arc_points[-1] = $points[$j+1];
|
|
$last_j = $j+1;
|
|
|
|
$last_line_angle = $line_angle;
|
|
}
|
|
|
|
# s1, s2, s3 form an arc
|
|
my $orientation = $s1->point_on_left($points[$i+2]) ? 'ccw' : 'cw';
|
|
|
|
# to find the center, we intersect the perpendicular lines
|
|
# passing by midpoints of $s1 and last segment
|
|
# a better method would be to draw all the perpendicular lines
|
|
# and find the centroid of the enclosed polygon, or to
|
|
# intersect multiple lines and find the centroid of the convex hull
|
|
# around the intersections
|
|
my $arc_center;
|
|
{
|
|
my $s1_mid = $s1->midpoint;
|
|
my $last_mid = Slic3r::Line->new($points[$last_j-1], $points[$last_j])->midpoint;
|
|
my $rotation_angle = PI/2 * ($orientation eq 'ccw' ? -1 : 1);
|
|
my $ray1 = Slic3r::Line->new($s1_mid, rotate_points($rotation_angle, $s1_mid, $points[$i+1]));
|
|
my $last_ray = Slic3r::Line->new($last_mid, rotate_points($rotation_angle, $last_mid, $points[$last_j]));
|
|
$arc_center = $ray1->intersection($last_ray, 0) // next POINT;
|
|
}
|
|
|
|
my $arc = Slic3r::ExtrusionPath::Arc->new(
|
|
polyline => Slic3r::Polyline->new(@arc_points),
|
|
role => $self->role,
|
|
flow_spacing => $self->flow_spacing,
|
|
orientation => $orientation,
|
|
center => $arc_center,
|
|
radius => $arc_center->distance_to($points[$i]),
|
|
);
|
|
|
|
# points 0..$i form a linear path
|
|
push @paths, $self->clone(polyline => Slic3r::Polyline->new(@points[0..$i]))
|
|
if $i > 0;
|
|
|
|
# add our arc
|
|
push @paths, $arc;
|
|
Slic3r::debugf "ARC DETECTED\n";
|
|
|
|
# remove arc points from path, leaving one
|
|
splice @points, 0, $last_j, ();
|
|
|
|
next CYCLE;
|
|
}
|
|
last;
|
|
}
|
|
|
|
# remaining points form a linear path
|
|
push @paths, $self->clone(polyline => Slic3r::Polyline->new(@points))
|
|
if @points > 1;
|
|
|
|
return @paths;
|
|
}
|
|
|
|
1;
|