76 lines
2.1 KiB
Perl
76 lines
2.1 KiB
Perl
use Test::More;
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use strict;
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use warnings;
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plan tests => 3;
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use Math::Clipper ':all';
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{
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my $square = [ # ccw
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[10, 10],
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[20, 10],
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[20, 20],
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[10, 20],
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];
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my $hole_in_square = [ # cw
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[14, 14],
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[14, 16],
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[16, 16],
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[16, 14],
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];
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my $square2 = [ # ccw
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[5, 12],
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[25, 12],
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[25, 18],
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[5, 18],
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];
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my $clipper = Math::Clipper->new;
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$clipper->add_subject_polygons([ $square, $hole_in_square ]);
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$clipper->add_clip_polygons([ $square2 ]);
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my $intersection = $clipper->ex_execute(CT_INTERSECTION, PFT_NONZERO, PFT_NONZERO);
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is_deeply $intersection, [
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{
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holes => [
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[
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[14, 14],
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[14, 16],
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[16, 16],
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[16, 14],
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],
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],
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outer => [
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[20, 12],
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[20, 18],
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[10, 18],
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[10, 12],
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],
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},
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], 'hole is preserved after intersection';
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}
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#==========================================================
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{
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my $contour1 = [ [0,0], [40,0], [40,40], [0,40] ]; # ccw
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my $contour2 = [ [10,10], [30,10], [30,30], [10,30] ]; # ccw
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my $hole = [ [15,15], [15,25], [25,25], [25,15] ]; # cw
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my $clipper = Math::Clipper->new;
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$clipper->add_subject_polygons([ $contour1, $contour2, $hole ]);
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my $union = $clipper->ex_execute(CT_UNION, PFT_NONZERO, PFT_NONZERO);
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is_deeply $union, [{ holes => [], outer => [ [40,0], [40,40], [0,40], [0,0] ] }],
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'union of two ccw and one cw is a contour with no holes';
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$clipper->clear;
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$clipper->add_subject_polygons([ $contour1, $contour2 ]);
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$clipper->add_clip_polygons([ $hole ]);
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my $diff = $clipper->ex_execute(CT_DIFFERENCE, PFT_NONZERO, PFT_NONZERO);
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is_deeply $diff, [{ holes => [[ [15,15], [15,25], [25,25], [25,15] ]], outer => [ [40,0], [40,40], [0,40], [0,0] ] }],
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'difference of a cw from two ccw is a contour with one hole';
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}
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