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New polygon_is_convex() function

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This commit is contained in:
Alessandro Ranellucci
2012-02-25 16:14:59 +01:00
parent 2d130061ed
commit a24ffee2aa
3 changed files with 24 additions and 4 deletions
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2
lib/Slic3r/ExPolygon.pm
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@@ -5,7 +5,7 @@ use warnings;
# an ExPolygon is a polygon with holes
use Math::Geometry::Voronoi;
use Slic3r::Geometry qw(point_in_polygon X Y A B);
use Slic3r::Geometry qw(X Y A B point_in_polygon);
use Slic3r::Geometry::Clipper qw(union_ex JT_MITER);
# the constructor accepts an array of polygons

11
lib/Slic3r/Geometry.pm
View File

@@ -19,7 +19,7 @@ our @EXPORT_OK = qw(
polygon_remove_acute_vertices polygon_remove_parallel_continuous_edges
shortest_path collinear scale unscale merge_collinear_lines
rad2deg_dir bounding_box_center line_intersects_any douglas_peucker
polyline_remove_short_segments normal triangle_normal
polyline_remove_short_segments normal triangle_normal polygon_is_convex
);
use XXX;
@@ -295,6 +295,15 @@ sub polygon_has_vertex {
return 0;
}
sub polygon_is_convex {
my ($points) = @_;
for (my $i = 0; $i <= $#$points; $i++) {
my $angle = angle3points($points->[$i-1], $points->[$i-2], $points->[$i]);
return 0 if $angle < PI;
}
return 1;
}
sub polyline_length {
my ($polyline) = @_;
my $length = 0;