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Ported point_line_distance() and removed same_point()

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This commit is contained in:
Alessandro Ranellucci 2013-11-06 23:08:03 +01:00
parent 09be25a156
commit c133a33ed2
6 changed files with 29 additions and 26 deletions
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22
lib/Slic3r/Geometry.pm
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@ -14,7 +14,7 @@ our @EXPORT_OK = qw(
polygon_has_vertex can_connect_points deg2rad rad2deg
rotate_points move_points clip_segment_polygon
sum_vectors multiply_vector subtract_vectors dot perp polygon_points_visibility
line_intersection bounding_box bounding_box_intersect same_point
line_intersection bounding_box bounding_box_intersect
angle3points three_points_aligned line_direction
polyline_remove_parallel_continuous_edges polyline_remove_acute_vertices
polygon_remove_acute_vertices polygon_remove_parallel_continuous_edges
@ -107,29 +107,11 @@ sub points_coincide {
return 0;
}
sub same_point {
my ($p1, $p2) = @_;
return $p1->[X] == $p2->[X] && $p1->[Y] == $p2->[Y];
}
sub distance_between_points {
my ($p1, $p2) = @_;
return sqrt((($p1->[X] - $p2->[X])**2) + ($p1->[Y] - $p2->[Y])**2);
}
sub point_line_distance {
my ($point, $line) = @_;
return distance_between_points($point, $line->[A])
if same_point($line->[A], $line->[B]);
my $n = ($line->[B][X] - $line->[A][X]) * ($line->[A][Y] - $point->[Y])
- ($line->[A][X] - $point->[X]) * ($line->[B][Y] - $line->[A][Y]);
my $d = sqrt((($line->[B][X] - $line->[A][X]) ** 2) + (($line->[B][Y] - $line->[A][Y]) ** 2));
return abs($n) / $d;
}
# this will check whether a point is in a polygon regardless of polygon orientation
sub point_in_polygon {
my ($point, $polygon) = @_;
@ -795,7 +777,7 @@ sub douglas_peucker {
my $dmax = 0;
my $index = 0;
for my $i (1..$#$points) {
my $d = point_line_distance($points->[$i], [ $points->[0], $points->[-1] ]);
my $d = $points->[$i]->distance_to(Slic3r::Line->new($points->[0], $points->[-1]));
if ($d > $dmax) {
$index = $i;
$dmax = $d;