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|
#!/usr/bin/env perl
use strictures 2;
use GIS::Distance;
use Module::Find qw( findallmod );
use Getopt::Long;
Getopt::Long::Configure(qw(
gnu_getopt no_ignore_case
));
GetOptions(
'pp!' => \my $do_pp,
'xs!' => \my $do_xs,
'geo' => \my $do_geo,
'precision|p=i' => \my $precision,
'h|help' => \my $help,
) or die "Unable to process options!\n";
if ($help) {
require Pod::Usage;
Pod::Usage::pod2usage( -verbose => 2 );
exit 0;
}
$do_pp = 1 if !defined $do_pp;
$do_xs = 1 if !defined $do_xs;
$precision ||= 12;
my @coords;
# Beirut to Dimashq.
@coords = ( 33.863146, 35.52824, 33.516496, 36.287842 );
# https://github.com/bluefeet/Geo-Distance/issues/15
#@coords = ( 52.484977, 13.385900, 52.485033, 13.370897 );
my %distances;
{
my @formulas = (
grep { $_ !~ m{::Formula} }
grep { $_ ne 'GIS::Distance::Constants' }
grep { $_ ne 'GIS::Distance::Fast' }
findallmod('GIS::Distance')
);
@formulas = (
grep { $_ !~ m{::Fast::} }
@formulas
) if !$do_xs;
@formulas = (
grep { $_ =~ m{::Fast::} }
@formulas
) if !$do_pp;
foreach my $formula (@formulas) {
my $gis = GIS::Distance->new( $formula );
my $km = $gis->distance( @coords )->km();
$distances{ $formula } = $km;
}
}
if ($do_geo and $do_pp) {
require Geo::Distance;
Geo::Distance->import();
my @formulas = @Geo::Distance::FORMULAS;
foreach my $formula (@formulas) {
my $geo = Geo::Distance->new();
$geo->formula( $formula );
my $km = $geo->old_distance( 'kilometer', reverse @coords );
$distances{ "Geo::Distance-$formula" } = $km;
}
}
if ($do_geo and $do_xs) {
require Geo::Distance::XS;
Geo::Distance::XS->import();
my @formulas = @Geo::Distance::XS::FORMULAS;
foreach my $formula (@formulas) {
my $geo = Geo::Distance->new();
$geo->formula( $formula );
my $km = $geo->distance( 'kilometer', reverse @coords );
$distances{ "Geo::Distance::XS-$formula" } = $km;
}
}
my %formulas_by_distance;
foreach my $formula (keys %distances) {
my $distance = sprintf("%.0${precision}f", $distances{$formula});
my $formulas = $formulas_by_distance{ $distance } ||= [];
push @$formulas, $formula;
}
foreach my $distance (sort keys %formulas_by_distance) {
print "$distance:\n";
print map { " - $_\n" } sort @{ $formulas_by_distance{$distance} };
}
__END__
=head1 NAME
author/distances - Display the distance generated by all the formulas.
=head1 SYNOPSIS
# List distances for every GIS::Distance and GIS::Distance::Fast
# formula.
author/distances
# List distances for every GIS::Distance::Fast and
# Geo::Distance::XS formula.
author/distances --geo --no-pp
# Displays this handy documentation!
author/distances --help
=head1 OPTIONS
=head2 pp
--no-pp
Disable the C<pp> option, meaning no pure-perl formulas will
be included.
=head2 xs
--no-xs
Disable the C<xs> option, meaning no XS formulas will
be included.
=head2 geo
--geo
L<Geo::Distance> and/or L<Geo::Distance::XS> formulas will be
included.
=head2 precision
--precision=14
-p 8
When grouping formulas format the timing to this number of
decimal places.
The default is C<12>, which does a good job of grouping the
formulas which really are producing the exact same result.
=head2 help
--help
-h
Displays this handy documentation!
=head1 AUTHORS AND LICENSE
See L<GIS::Distance/AUTHORS> and L<GIS::Distance/LICENSE>.
=cut
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