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#!perl -w
use strict;
use Test::More tests => 10;
use Imager;
BEGIN { use_ok('Imager::Matrix2d', ':handy') }
my $id = Imager::Matrix2d->identity;
ok(almost_equal($id, [ 1, 0, 0,
0, 1, 0,
0, 0, 1 ]), "identity matrix");
my $trans = Imager::Matrix2d->translate('x'=>10, 'y'=>-11);
ok(almost_equal($trans, [ 1, 0, 10,
0, 1, -11,
0, 0, 1 ]), "translate matrix");
my $trans_x = Imager::Matrix2d->translate(x => 10);
ok(almost_equal($trans_x, [ 1, 0, 10,
0, 1, 0,
0, 0, 1 ]), "translate just x");
my $trans_y = Imager::Matrix2d->translate('y' => 11);
ok(almost_equal($trans_y, [ 1, 0, 0,
0, 1, 11,
0, 0, 1 ]), "translate just y");
my $rotate = Imager::Matrix2d->rotate(degrees=>90);
ok(almost_equal($rotate, [ 0, -1, 0,
1, 0, 0,
0, 0, 1 ]), "rotate matrix");
my $shear = Imager::Matrix2d->shear('x'=>0.2, 'y'=>0.3);
ok(almost_equal($shear, [ 1, 0.2, 0,
0.3, 1, 0,
0, 0, 1 ]), "shear matrix");
my $scale = Imager::Matrix2d->scale('x'=>1.2, 'y'=>0.8);
ok(almost_equal($scale, [ 1.2, 0, 0,
0, 0.8, 0,
0, 0, 1 ]), "scale matrix");
my $trans_called;
$rotate = Imager::Matrix2d::Test->rotate(degrees=>90, x=>50);
ok($trans_called, "translate called on rotate with just x");
$trans_called = 0;
$rotate = Imager::Matrix2d::Test->rotate(degrees=>90, 'y'=>50);
ok($trans_called, "translate called on rotate with just y");
sub almost_equal {
my ($m1, $m2) = @_;
for my $i (0..8) {
abs($m1->[$i] - $m2->[$i]) < 0.00001 or return undef;
}
return 1;
}
# this is used to ensure translate() is called correctly by rotate
package Imager::Matrix2d::Test;
use vars qw(@ISA);
BEGIN { @ISA = qw(Imager::Matrix2d); }
sub translate {
my ($class, %opts) = @_;
++$trans_called;
return $class->SUPER::translate(%opts);
}
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