EVOLUTION-MANAGER

Edit File: Turtle.pm

package Turtle; # Written by jreed@itis.com, adapted by Cristy. sub new { my $class = shift; my $self = {}; @{$self}{qw(x y theta mirror)} = @_; bless $self, $class; } sub forward { my $self = shift; my ($r, $what) = @_; my ($newx, $newy)=($self->{x}+$r* sin($self->{theta}), $self->{y}+$r*-cos($self->{theta})); if ($what) { &$what($self->{x}, $self->{y}, $newx, $newy); # motion } # According to the coderef passed in ($self->{x}, $self->{y})=($newx, $newy); # change the old coords } sub turn { my $self = shift; my $dtheta = shift; $self->{theta} += $dtheta*$self->{mirror}; } sub state { my $self = shift; @{$self}{qw(x y theta mirror)}; } sub setstate { my $self = shift; @{$self}{qw(x y theta mirror)} = @_; } sub mirror { my $self = shift; $self->{mirror} *= -1; } "Turtle.pm";