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Ported point_along_segment(), Polyline::length(), Polyline::clip_end() to XS

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Alessandro Ranellucci 2013-10-27 22:57:25 +01:00
parent 26a18a2a52
commit 29b83517cb
12 changed files with 64 additions and 57 deletions
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52
lib/Slic3r/Polyline.pm
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@ -35,11 +35,6 @@ sub simplify {
return __PACKAGE__->new(@$simplified);
}
sub length {
my $self = shift;
return Boost::Geometry::Utils::linestring_length($self->pp);
}
sub grow {
my $self = shift;
my ($distance, $scale, $joinType, $miterLimit) = @_;
@ -85,53 +80,6 @@ sub align_to_origin {
return $self->translate(-$bb->x_min, -$bb->y_min);
}
# removes the given distance from the end of the polyline
sub clip_end {
my $self = shift;
my ($distance) = @_;
while ($distance > 0) {
my $last_point = $self->last_point->clone;
$self->pop_back;
last if @$self == 0;
my $last_segment_length = $last_point->distance_to($self->last_point);
if ($last_segment_length <= $distance) {
$distance -= $last_segment_length;
next;
}
my $new_point = Slic3r::Geometry::point_along_segment($last_point, $self->last_point, $distance);
$self->append($new_point);
$distance = 0;
}
}
# only keeps the given distance at the beginning of the polyline
sub clip_start {
my $self = shift;
my ($distance) = @_;
my @my_points = @$self;
my $points = [ $my_points[0]->clone ];
for (my $i = 1; $distance > 0 && $i <= $#my_points; $i++) {
my $point = $my_points[$i];
my $segment_length = $point->distance_to($my_points[$i-1]);
if ($segment_length <= $distance) {
$distance -= $segment_length;
push @$points, $point;
next;
}
my $new_point = Slic3r::Geometry::point_along_segment($my_points[$i-1], $point, $distance);
push @$points, Slic3r::Point->new(@$new_point);
$distance = 0;
}
return __PACKAGE__->new(@$points);
}
# this method returns a collection of points picked on the polygon contour
# so that they are evenly spaced according to the input distance
# (find a better name!)