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#!/usr/bin/env perl
use strict;
use warnings;
use Test::More tests => 6;
use lib '../lib';
use Math::Polygon::Transform qw/polygon_rotate/;
use Math::Polygon::Calc qw/polygon_string polygon_format/;
my @p = ([0,0], [1,1], [-2,1], [-2,-2], [0,0]);
# format fights rounding errors
sub round($) { my $x = sprintf "%.4f", $_[0]; $x =~ s/\.?0+$//; $x }
sub rotate(@) { polygon_format \&round, polygon_rotate @_ }
is( polygon_string(rotate degrees => 0, @p)
, "[0,0], [1,1], [-2,1], [-2,-2], [0,0]"
, 'identity'
);
is( polygon_string(rotate radians => 0, @p)
, "[0,0], [1,1], [-2,1], [-2,-2], [0,0]"
, 'identity'
);
is( polygon_string(rotate degrees => 0, center => [0,0], @p)
, "[0,0], [1,1], [-2,1], [-2,-2], [0,0]"
, 'identity'
);
is( polygon_string(rotate degrees => +90, @p)
, "[0,0], [1,-1], [1,2], [-2,2], [0,0]"
, 'rotate +90'
);
is( polygon_string(rotate degrees => -90, @p)
, "[0,0], [-1,1], [-1,-2], [2,-2], [0,0]"
, 'rotate -90'
);
is( polygon_string(rotate degrees => -90, center => [3,4], @p)
, "[7,1], [6,2], [6,-1], [9,-1], [7,1]"
, 'rotate 90 around [3,4]'
);
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