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Added a couple Clipper tests. #858

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Alessandro Ranellucci 2012-12-27 14:16:50 +01:00
parent 0da71dbdfa
commit 547e62d0a8
1 changed files with 64 additions and 44 deletions
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108
t/clipper.t
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@ -2,52 +2,72 @@ use Test::More;
use strict; use strict;
use warnings; use warnings;
plan tests => 1; plan tests => 3;
use Math::Clipper ':all'; use Math::Clipper ':all';
my $clipper = Math::Clipper->new;
my $square = [ # ccw {
[10, 10], my $square = [ # ccw
[20, 10], [10, 10],
[20, 20], [20, 10],
[10, 20], [20, 20],
]; [10, 20],
];
my $hole_in_square = [ # cw my $hole_in_square = [ # cw
[14, 14], [14, 14],
[14, 16], [14, 16],
[16, 16], [16, 16],
[16, 14], [16, 14],
]; ];
my $square2 = [ # ccw
my $square2 = [ # ccw [5, 12],
[5, 12], [25, 12],
[25, 12], [25, 18],
[25, 18], [5, 18],
[5, 18], ];
]; my $clipper = Math::Clipper->new;
$clipper->add_subject_polygons([ $square, $hole_in_square ]);
$clipper->add_subject_polygons([ $square, $hole_in_square ]); $clipper->add_clip_polygons([ $square2 ]);
$clipper->add_clip_polygons([ $square2 ]); my $intersection = $clipper->ex_execute(CT_INTERSECTION, PFT_NONZERO, PFT_NONZERO);
my $intersection = $clipper->ex_execute(CT_INTERSECTION, PFT_NONZERO, PFT_NONZERO); is_deeply $intersection, [
{
is_deeply $intersection, [ holes => [
{ [
holes => [ [14, 16],
[ [16, 16],
[14, 16], [16, 14],
[16, 16], [14, 14],
[16, 14], ],
[14, 14],
], ],
], outer => [
outer => [ [10, 18],
[10, 18], [10, 12],
[10, 12], [20, 12],
[20, 12], [20, 18],
[20, 18], ],
], },
}, ], 'hole is preserved after intersection';
], 'hole is preserved after intersection'; }
#==========================================================
{
my $contour1 = [ [0,0], [40,0], [40,40], [0,40] ]; # ccw
my $contour2 = [ [10,10], [30,10], [30,30], [10,30] ]; # ccw
my $hole = [ [15,15], [15,25], [25,25], [25,15] ]; # cw
my $clipper = Math::Clipper->new;
$clipper->add_subject_polygons([ $contour1, $contour2, $hole ]);
my $union = $clipper->ex_execute(CT_UNION, PFT_NONZERO, PFT_NONZERO);
is_deeply $union, [{ holes => [], outer => [ [0,40], [0,0], [40,0], [40,40] ] }],
'union of two ccw and one cw is a contour with no holes';
$clipper->clear;
$clipper->add_subject_polygons([ $contour1, $contour2 ]);
$clipper->add_clip_polygons([ $hole ]);
my $diff = $clipper->ex_execute(CT_DIFFERENCE, PFT_NONZERO, PFT_NONZERO);
is_deeply $diff, [{ holes => [[ [15,25], [25,25], [25,15], [15,15] ]], outer => [ [0,40], [0,0], [40,0], [40,40] ] }],
'difference of a cw from two ccw is a contour with one hole';
}