67 lines
1.0 KiB
Perl
67 lines
1.0 KiB
Perl
package P1;
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use 5.20.0;
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use warnings;
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use List::AllUtils qw/ /;
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use Math::Vector::Real;
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use Moose;
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use MooseX::MungeHas 'is_rw';
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use experimental qw/ signatures postderef switch /;
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has coords => sub {
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return V(0,0);
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};
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has facing => sub {
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1;
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};
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my @delta = (
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V(0,1),
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V(1,0),
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V(0,-1),
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V(-1,0),
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);
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sub delta {
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return \@delta;
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}
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sub turn($self,$n) {
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my $d = ($self->facing + $n/90)%4;
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$self->facing($d);
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}
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sub move($self,$m) {
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$m =~ /(.)(\d+)/;
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my ( $x, $c ) = ($1,$2);
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my $coords = $self->coords;
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given($x) {
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$coords += $c * $delta[$self->facing] when 'F';
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$coords += $c * $delta[0] when 'N';
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$coords += $c * $delta[1] when 'E';
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$coords += $c * $delta[2] when 'S';
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$coords += $c * $delta[3] when 'W';
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$self->turn($c) when 'R';
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$self->turn(-$c) when 'L';
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}
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$self->coords($coords);
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}
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sub solution($class,@instructions) {
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my $self = $class->new;
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$self->move($_) for @instructions;
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$self->coords->manhattan_dist(V(0,0));
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}
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1;
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