#!/usr/bin/perl
#
# phoon - show the phase of the moon
#
# Translated from Jef Poskanzer's phoon.c (http://www.acme.com/softw
+are/phoon/)
# and John Walker's moontool.c astro libraries (http://www.fourmilab
+.ch/moontool/)
# by James Allenspach <jima@legnog.com>. The copyright from the orig
+inal source:
#
# ** Copyright (C) 1986,1987,1988,1995 by Jef Poskanzer <jef@mail.ac
+me.com>.
# ** All rights reserved.
# **
# ** Redistribution and use in source and binary forms, with or with
+out
# ** modification, are permitted provided that the following conditi
+ons
# ** are met:
# ** 1. Redistributions of source code must retain the above copyrig
+ht
# ** notice, this list of conditions and the following disclaimer
+.
# ** 2. Redistributions in binary form must reproduce the above copy
+right
# ** notice, this list of conditions and the following disclaimer
+ in the
# ** documentation and/or other materials provided with the distr
+ibution.
# **
# ** THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS I
+S'' AND
# ** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED T
+O, THE
# ** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICU
+LAR PURPOSE
# ** ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS B
+E LIABLE
# ** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CO
+NSEQUENTIAL
# ** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITU
+TE GOODS
# ** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRU
+PTION)
# ** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTR
+ACT, STRICT
# ** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+IN ANY WAY
# ** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBI
+LITY OF
# ** SUCH DAMAGE.
#
use Date::Parse;
use POSIX;
use strict;
use constant {
SECSPERMINUTE => 60,
SECSPERHOUR => (60 * 60),
SECSPERDAY => (24 * 60 * 60),
PI => 3.1415926535897932384626433,
DEFAULTNUMLINES => 23,
ASPECTRATIO => 0.5, # If you change the aspect ratio,
+the canned backgrounds won't work.
epoch => 2444238.5, # 1980 January 0.0
# Constants defining the Sun's apparent orbit
elonge => 278.833540, # Ecliptic longitude of the Sun at
+ epoch 1980.0
elongp => 282.596403, # Ecliptic longitude of the Sun at
+ perigee
eccent => 0.016718, # Eccentricity of Earth's orbit
sunsmax => 1.495985e8, # Semi-major axis of Earth's orbit
+, km
sunangsiz => 0.533128, # Sun's angular size, degrees, at
+semi-major axis distance
# Elements of the Moon's orbit, epoch 1980.0
mmlong => 64.975464, # Moon's mean lonigitude at the ep
+och
mmlongp => 349.383063, # Mean longitude of the perigee at
+ the epoch
mlnode => 151.950429, # Mean longitude of the node at th
+e epoch
minc => 5.145396, # Inclination of the Moon's orbit
mecc => 0.054900, # Eccentricity of the Moon's orbit
+
mangsiz => 0.5181, # Moon's angular size at distance
+a from Earth
msmax => 384401.0, # Semi-major axis of Moon's orbit
+in km
mparallax => 0.9507, # Parallax at distance a from Eart
+h
synmonth => 29.53058868, # Synodic month (new Moon to new M
+oon)
lunatbase => 2423436.0, # Base date for E. W. Brown's numb
+ered series of lunations (1923 January 16)
# Properties of the Earth
earthrad => 6378.16, # Radius of Earth in kilometres
EPSILON => 1E-6,
};
my $usage = "usage: $0 [ -l <lines> ] [ <date/time> ]\n";
sub putseconds {
my($secs) = @_;
my($days,$hours,$minutes);
$days = int($secs / SECSPERDAY);
$secs -= $days * SECSPERDAY;
$hours = int($secs / SECSPERHOUR);
$secs -= $hours * SECSPERHOUR;
$minutes = int($secs / SECSPERMINUTE);
$secs -= $minutes * SECSPERMINUTE;
return sprintf( "%ld %2ld:%02ld:%02ld", $days, $hours, $minutes, $
+secs );
}
sub unix_to_julian {
return $_[0] / 86400.0 + 2440587.4999996666666666666;
}
sub fixangle { return ($_[0] - 360.0 * (POSIX::floor($_[0] / 360.0)));
+ }
sub torad { return ($_[0] * (PI / 180.0)); } # Deg->Rad
sub todeg { return ($_[0] * (180.0 / PI)); } # Rad->Deg
sub dsin { return sin(torad($_[0])); } # sin from Deg
sub dcos { return cos(torad($_[0])); } # cos from Deg
sub kepler { # solve the equation of Kepler
my($m, $ecc) = @_;
my($e,$delta);
$e = $m = torad($m);
do {
$delta = $e - $ecc * sin($e) - $m;
$e -= $delta / (1 - $ecc * cos($e));
} while (abs ($delta) > EPSILON);
return $e;
}
sub phase {
my($pdate) = @_;
# Calculation of the Sun's position
my($Day) = $pdate - epoch; # Date within epoch
my($N) = fixangle((360 / 365.2422) * $Day); # Mean anomaly of the
+Sun
my($M) = fixangle($N + elonge - elongp); # Convert from perigee
+ co-ordinates to epoch 1980.0
my($Ec) = kepler($M, eccent); # Solve equation of Kepler */
$Ec = sqrt((1 + eccent) / (1 - eccent)) * tan($Ec / 2);
$Ec = 2 * todeg(atan($Ec)); # True anomaly
my($Lambdasun) = fixangle($Ec + elongp); # Sun's geocentric ecl
+iptic longitude
# Orbital distance factor
my($F) = ((1 + eccent * cos(torad($Ec))) / (1 - eccent * eccent));
my($SunDist) = sunsmax / $F; # Distance to Sun in km
my($SunAng) = $F * sunangsiz; # Sun's angular size in degrees
# Calculation of the Moon's position
# Moon's mean longitude
my($ml) = fixangle(13.1763966 * $Day + mmlong);
# Moon's mean anomaly
my($MM) = fixangle($ml - 0.1114041 * $Day - mmlongp);
# Moon's ascending node mean longitude
my($MN) = fixangle(mlnode - 0.0529539 * $Day);
# Evection
my($Ev) = 1.2739 * sin(torad(2 * ($ml - $Lambdasun) - $MM));
# Annual equation
my($Ae) = 0.1858 * sin(torad($M));
# Correction term
my($A3) = 0.37 * sin(torad($M));
# Corrected anomaly
my($MmP) = $MM + $Ev - $Ae - $A3;
# Correction for the equation of the centre
my($mEc) = 6.2886 * sin(torad($MmP));
# Another correction term
my($A4) = 0.214 * sin(torad(2 * $MmP));
# Corrected longitude
my($lP) = $ml + $Ev + $mEc - $Ae + $A4;
# Variation
my($V) = 0.6583 * sin(torad(2 * ($lP - $Lambdasun)));
# True longitude
my($lPP) = $lP + $V;
# Corrected longitude of the node
my($NP) = $MN - 0.16 * sin(torad($M));
# Y inclination coordinate
my($y) = sin(torad($lPP - $NP)) * cos(torad(minc));
# X inclination coordinate
my($x) = cos(torad($lPP - $NP));
# Ecliptic longitude
my($Lambdamoon) = todeg(atan2($y, $x));
$Lambdamoon += $NP;
# Ecliptic latitude
my($BetaM) = todeg(asin(sin(torad($lPP - $NP)) * sin(torad(minc)))
+);
# Calculation of the phase of the Moon
# Age of the Moon in degrees
my($MoonAge) = $lPP - $Lambdasun;
# Phase of the Moon
my($MoonPhase) = (1 - cos(torad($MoonAge))) / 2;
# Calculate distance of moon from the centre of the Earth
my($MoonDist) = (msmax * (1 - mecc * mecc)) /
(1 + mecc * cos(torad($MmP + $mEc)));
# Calculate Moon's angular diameter
my($MoonDFrac) = $MoonDist / msmax;
my($MoonAng) = mangsiz / $MoonDFrac;
# Calculate Moon's parallax
my($MoonPar) = mparallax / $MoonDFrac;
return (
fixangle($MoonAge) / 360.0, # terminator phase
+ angle
$MoonPhase, # moon phase
synmonth * (fixangle($MoonAge) / 360.0), # age of moon in d
+ays
$MoonDist, # distance in km
$MoonAng, # angular diameter
+ in degrees
$SunDist, # distance to Sun
$SunAng, # Sun's angular di
+ameter
);
}
# jyear - Convert Julian date to year, month, day.
sub jyear {
my($td) = @_;
my($j,$d,$y,$m);
$td += 0.5; #Astronomical to civil
$j = POSIX::floor($td);
$j -= 1721119.0;
$y = POSIX::floor(((4 * $j) - 1) / 146097.0);
$j = ($j * 4.0) - (1.0 + (146097.0 * $y));
$d = POSIX::floor($j / 4.0);
$j = POSIX::floor(((4.0 * $d) + 3.0) / 1461.0);
$d = ((4.0 * $d) + 3.0) - (1461.0 * $j);
$d = POSIX::floor(($d + 4.0) / 4.0);
$m = POSIX::floor(((5.0 * $d) - 3) / 153.0);
$d = (5.0 * $d) - (3.0 + (153.0 * $m));
$d = POSIX::floor(($d + 5.0) / 5.0);
$y = (100.0 * $y) + $j;
if ($m < 10.0) {
$m += 3;
} else {
$m -= 9;
++$y;
}
return ($y,$m,$d);
}
# meanphase - Calculates time of the mean new Moon for a given base d
+ate. This argument K to this function is
# the precomputed synodic month index, given by:
#
# K = (year - 1900) * 12.3685
#
# where year is expressed as a year and fractional year.
sub meanphase {
my($sdate,$k) = @_;
my($t,$t2,$t3,$nt1);
# Time in Julian centuries from 1900 January 0.5
$t = ($sdate - 2415020.0) / 36525;
$t2 = $t * $t; # Square for frequent use
$t3 = $t2 * $t; # Cube for frequent use
$nt1 = 2415020.75933 + synmonth * $k
+ 0.0001178 * $t2
- 0.000000155 * $t3
+ 0.00033 * dsin(166.56 + 132.87 * $t - 0.009173 * $t2);
return $nt1;
}
# truephase - Given a K value used to determine the mean phase of the
+ new moon, and a phase
# selector (0.0, 0.25, 0.5, 0.75), obtain the true, corrected phase ti
+me.
sub truephase {
my($k, $phase) = @_;
my($t,$t2,$t3, $pt, $m, $mprime, $f);
my($apcor) = 0;
$k += $phase; # Add phase to new moon time
$t = $k / 1236.85; # Time in Julian centuries from 1900 January 0
+.5
$t2 = $t * $t; # Square for frequent use
$t3 = $t2 * $t; # Cube for frequent use
$pt = 2415020.75933 # Mean time of phase
+ synmonth * $k
+ 0.0001178 * $t2
- 0.000000155 * $t3
+ 0.00033 * dsin(166.56 + 132.87 * $t - 0.009173 * $t2);
$m = 359.2242 # Sun's mean anomaly
+ 29.10535608 * $k
- 0.0000333 * $t2
- 0.00000347 * $t3;
$mprime = 306.0253 # Moon's mean anomaly
+ 385.81691806 * $k
+ 0.0107306 * $t2
+ 0.00001236 * $t3;
$f = 21.2964 # Moon's argument of latitude
+ 390.67050646 * $k
- 0.0016528 * $t2
- 0.00000239 * $t3;
if (($phase < 0.01) || (abs($phase - 0.5) < 0.01)) {
# Corrections for New and Full Moon
$pt += (0.1734 - 0.000393 * $t) * dsin($m)
+ 0.0021 * dsin(2 * $m)
- 0.4068 * dsin($mprime)
+ 0.0161 * dsin(2 * $mprime)
- 0.0004 * dsin(3 * $mprime)
+ 0.0104 * dsin(2 * $f)
- 0.0051 * dsin($m + $mprime)
- 0.0074 * dsin($m - $mprime)
+ 0.0004 * dsin(2 * $f + $m)
- 0.0004 * dsin(2 * $f - $m)
- 0.0006 * dsin(2 * $f + $mprime)
+ 0.0010 * dsin(2 * $f - $mprime)
+ 0.0005 * dsin($m + 2 * $mprime);
$apcor = 1;
} elsif ((abs($phase - 0.25) < 0.01 || (abs($phase - 0.75) < 0.01)
+)) {
$pt += (0.1721 - 0.0004 * $t) * dsin($m)
+ 0.0021 * dsin(2 * $m)
- 0.6280 * dsin($mprime)
+ 0.0089 * dsin(2 * $mprime)
- 0.0004 * dsin(3 * $mprime)
+ 0.0079 * dsin(2 * $f)
- 0.0119 * dsin($m + $mprime)
- 0.0047 * dsin($m - $mprime)
+ 0.0003 * dsin(2 * $f + $m)
- 0.0004 * dsin(2 * $f - $m)
- 0.0006 * dsin(2 * $f + $mprime)
+ 0.0021 * dsin(2 * $f - $mprime)
+ 0.0003 * dsin($m + 2 * $mprime)
+ 0.0004 * dsin($m - 2 * $mprime)
- 0.0003 * dsin(2 * $m + $mprime);
if ($phase < 0.5) {
# First quarter correction
$pt += 0.0028 - 0.0004 * dcos($m) + 0.0003 * dcos($mprime);
} else {
# Last quarter correction
$pt += -0.0028 + 0.0004 * dcos($m) - 0.0003 * dcos($mprime);
}
$apcor = 1;
}
if (!$apcor) {
die "TRUEPHASE called with invalid phase selector.\n";
}
return $pt;
}
# phasehunt5 - Find time of phases of the moon which surround the curr
+ent date. Five phases are found, starting
# and ending with the new moons which bound the current lunation.
sub phasehunt5 {
my($sdate) = @_;
my($adate, $k1, $k2, $nt1, $nt2, $yy, $mm, $dd);
$adate = $sdate - 45;
($yy,$mm,$dd) = jyear($adate);
$k1 = POSIX::floor(($yy + (($mm - 1) * (1.0 / 12.0)) - 1900) * 12.
+3685);
$adate = $nt1 = meanphase($adate, $k1);
while (1) {
$adate += synmonth;
$k2 = $k1 + 1;
$nt2 = meanphase($adate, $k2);
if ($nt1 <= $sdate && $nt2 > $sdate) {
last;
}
$nt1 = $nt2;
$k1 = $k2;
}
return [
truephase ($k1, 0.0),
truephase ($k1, 0.25),
truephase ($k1, 0.5),
truephase ($k1, 0.75),
truephase ($k2, 0.0),
];
}
# phasehunt2 - Find time of phases of the moon which surround the cur
+rent date. Two phases are found.
sub phasehunt2 {
my($sdate) = @_;
my(@phases,@which,$phases5);
$phases5 = phasehunt5( $sdate );
$phases[0] = $phases5->[0];
$which[0] = 0.0;
$phases[1] = $phases5->[1];
$which[1] = 0.25;
if ( $phases[1] <= $sdate ) {
$phases[0] = $phases[1];
$which[0] = $which[1];
$phases[1] = $phases5->[2];
$which[1] = 0.5;
if ( $phases[1] <= $sdate ) {
$phases[0] = $phases[1];
$which[0] = $which[1];
$phases[1] = $phases5->[3];
$which[1] = 0.75;
if ( $phases[1] <= $sdate ) {
$phases[0] = $phases[1];
$which[0] = $which[1];
$phases[1] = $phases5->[4];
$which[1] = 0.0;
}
}
}
return \@which, \@phases;
}
sub putmoon {
my($t, $numlines, $atfiller) = @_;
my $secsynodic = 29*SECSPERDAY + 12*SECSPERHOUR + 44*SECSPERMINUTE
+ + 3;
my(%background) = (
'18' => [ " .----------. ",
" .--' o . `--. ",
" .'@ @@@@@@ O . . `. ",
" .'@@ @@@@@@@@ @@@@ . `. ",
" .' . @@@@@@@@ @@@@@@ . `. ",
" / @@ o @@@@@@. @@@@ O @\\ ",
" |@@@@ @@@@@@ @@| ",
" / @@@@@ `.-. . @@@@@@@@ . @@\\",
" | @@@@ --`-' . o @@@@@@@ |",
" |@ @@ @@@@@@ @@@ |",
" \\ @@ @ . () @@ @@@@@ /",
" | @ @@@ @@@ @@@ | ",
" \\ . @@ @\\ . . @@ o / ",
" `. @@@@ _\\ / . o .' ",
" `. @@ ()--- .' ",
" `. / | . o .' ",
" `--./ . .--' ",
" `----------' "
],
'19' => [ " .----------. ",
" .--' o . `--. ",
" .-'@ @@@@@@ O . . `-. ",
" .' @@ @@@@@@@@ @@@@ . `. ",
" / . @@@@@@@@ @@@@@@ . \\ ",
" /@@ o @@@@@@. @@@@ O @\\ ",
" /@@@@ @@@@@@ @@@\\ ",
" . @@@@@ `.-./ . @@@@@@@@ . @@ .",
" | @@@@ --`-' . @@@@@@@ |",
" |@ @@ ` o @@@@@@ @@@@ |",
" | @@ o @@ @@@@@@ |",
" ` . @ @@ () @@@ @@@@ '",
" \\ @@ @@@@ . @@ . o / ",
" \\ @@@@ @@\\ . o / ",
" \\ . @@ _\\ / . .-. / ",
" `. . ()--- `-' .' ",
" `-. ./ | . o .-' ",
" `--./ . .--' ",
" `----------' "
],
'pumpkin19' => [ " @@@@@@@@@@@@
+ ",
" @@@@@@@@@@@@@@@@@@@@
+ ",
" @@@@@@@@@@@@@@@@@@@@@@@@@@
+ ",
" @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
+ ",
" @@@@ @@@@@@@@ @@@@
+ ",
" @@@@@@ @@@@@@@@@@ @@@@@@
+ ",
" @@@@@@@@ @@@@@@@@@@@@ @@@@@@@
+@ ",
" @@@@@@@@@@ @@@@@@ @@@@@@ @@@@@@@@
+@@",
" @@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@
+@@",
" @@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@
+@@",
" @@@@@@@@@@@@@@@ @@@@@@@@@@@@@
+@@",
" @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
+@@",
" @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
+@ ",
" @@@@@ @@ @@@@@
+ ",
" @@@@@@ @@@@@@
+ ",
" @@@@@@@@ @@@@@@@@
+ ",
" @@@@@@@@@ @@@@@@@@@
+ ",
" @@@@@@@@@@@@@@@@@@@@
+ ",
" @@@@@@@@@@@@
+ "
],
'21' => [ " .----------. ",
" .---' O . . `---. ",
" .-'@ @@@@@@ . @@@@@ `-. ",
" .'@@ @@@@@@@@@ @@@@@@@ . `. ",
" / o @@@@@@@@@ @@@@@@@ . \\ ",
" /@ o @@@@@@@@@. @@@@@@@ O \\ ",
" /@@@ . @@@@@\@o @@@@@@@@@@ @@\\ ",
" /@@@@@ . @@@@@@@@@@@@@ o @@@\\ ",
" .@@@@@ O `.-./ . @@@@@@@@@@@@ @@ .",
" | @@@@ --`-' o @@@@@@@@ @@@@ |",
" |@ @@@ ` o . @@ . @@@@@@@ |",
" | @@ @ .-. @@@ @@@@@@@ |",
" ` . @ @@@ `-' . @@@@ @@@@ o '",
" \\ @@ @@@@@ . @@ . / ",
" \\ @@@@ @\\@@ / . O . o . / ",
" \\o @@ \\ \\ / . . / ",
" \\ . .\\.-.___ . . .-. / ",
" `. `-' `-'.' ",
" `-. o / | o O . .-' ",
" `---. . . .---' ",
" `----------' "
],
'22' => [ " .------------. ",
" .--' o . . `--. ",
" .-' . O . . `-. ",
" .'@ @@@@@@@ . @@@@@ `. ",
" .'@@@ @@@@@@@@@@@ @@@@@@@ . `. ",
" / o @@@@@@@@@@@ @@@@@@@ . \\ ",
" /@@ o @@@@@@@@@@@. @@@@@@@ O \\ ",
" /@@@@ . @@@@@@\@o @@@@@@@@@@ @@@\\ ",
" |@@@@@ . @@@@@@@@@@@@ @@@@| ",
" /@@@@@ O `.-./ . @@@@@@@@@@@ @@ \\",
" | @@@@ --`-' o . @@@@@@@ @@@@ |",
" |@ @@@ @@ @ ` o .-. @@ . @@@@@@ |",
" \\ @@@ `-' . @@@ @@@@@@ /",
" | . @ @@ @@@@@ . @@@@ @@@ o | ",
" \\ @@@@ @\\@@ / . O @@ . . / ",
" \\ o @@ \\ \\ / . . o / "
+,
" \\ . .\\.-.___ . . . .-. / ",
" `. `-' `-' .' ",
" `. o / | o O . .' ",
" `-. / . . .-' ",
" `--. . .--' ",
" `------------' "
],
'23' => [ " .------------. ",
" .--' o . . `--. ",
" .-' . O . . `-. ",
" .-'@ @@@@@@@ . @@@@@ `-. ",
" /@@@ @@@@@@@@@@@ @@@@@@@ . \\ "
+,
" ./ o @@@@@@@@@@@ @@@@@@@ . \\. "
+,
" /@@ o @@@@@@@@@@@. @@@@@@@ O \\ "
+,
" /@@@@ . @@@@@@\@o @@@@@@@@@@ @@@ \\
+",
" |@@@@@ . @@@@@@@@@@@@@ o @@@@| ",
" /@@@@@ O `.-./ . @@@@@@@@@@@@ @@ \\"
+,
" | @@@@ --`-' o @@@@@@@@ @@@@ |",
" |@ @@@ ` o . @@ . @@@@@@@ |",
" | @@ @ .-. @@@ @@@@@@@ |",
" \\ . @ @@@ `-' . @@@@ @@@@ o /"
+,
" | @@ @@@@@ . @@ . | ",
" \\ @@@@ @\\@@ / . O . o . /
+",
" \\ o @@ \\ \\ / . . /
+ ",
" `\\ . .\\.-.___ . . .-. /'
+",
" \\ `-' `-' / "
+,
" `-. o / | o O . .-' ",
" `-. / . . .-' ",
" `--. . .--' ",
" `------------' "
],
'24' => [ " .------------.
+",
" .---' o . . `---.
+",
" .-' . O . . `-.
+",
" .'@ @@@@@@@ . @@@@@ `.
+",
" .'@@ @@@@@@@@@@@ @@@@@@@ . `.
+",
" / o @@@@@@@@@@@ @@@@@@@ . \\
+ ",
" /@ o @@@@@@@@@@@. @@@@@@@ O \\
+ ",
" /@@@ . @@@@@@\@o @@@@@@@@@@ @@@ \\
+ ",
" /@@@@@ . @@@@@@@@@@@@@ o @@@@ \\
+ ",
" |@@@@ O `.-./ . @@@@@@@@@@@@ @@ |
+",
" / @@@@ --`-' o @@@@@@@@ @@@@ \
+\",
" |@ @@@ @ ` . @@ @@@@@@@ |
+",
" | @ o @ @@@@@@@ |
+",
" \\ @@ .-. @@@ @@@@ o
+/",
" | . @ @@@ `-' . @@@@ |
+",
" \\ @@ @@@@@ . @@ . /
+ ",
" \\ @@@@ @\\@@ / . O . o . /
+ ",
" \\ o @@ \\ \\ / . . /
+ ",
" \\ . .\\.-.___ . . .-. /
+ ",
" `. `-' `-' .'
+",
" `. o / | o O . .'
+",
" `-. / . . .-'
+",
" `---. . .---'
+",
" `------------'
+"
],
'29' => [ " .--------------.
+ ",
" .---' o . `---.
+ ",
" .-' . O . . `-.
+ ",
" .-' @@@@@@ . `-.
+ ",
" .'@@ @@@@@@@@@@@ @@@@@@@ .
+`. ",
" .'@@@ @@@@@@@@@@@@@@ @@@@@@@@@
+ `. ",
" /@@@ o @@@@@@@@@@@@@@ @@@@@@@@@ O
+ \\ ",
" / @@@@@@@@@@@@@@ @ @@@@@@@@@ @@
+ . \\ ",
" /@ o @@@@@@@@@@@ . @@ @@@@@@@@@@@
+ @@ \\ ",
" /@@@ . @@@@@@ o @ @@@@@@@@@@@@@
+o @@@@ \\ ",
" /@@@@@ @ . @@@@@@@@@@@@@@
+ @@@@@ \\ ",
" |@@@@@ O `.-./ . . @@@@@@@@@@@@@
+ @@@ | ",
" / @@@@@ --`-' o @@@@@@@@@@@
+@@@ . \\",
" |@ @@@@ . @ @ ` @ @@ . @
+@@@@@ |",
" | @@ o @@ . @
+@@@@@ |",
" | . @ @ @ o @@ o @
+@@@@@. |",
" \\ @ @ @ .-. @@@@
+ @@@ /",
" | @ @ @ `-' . @@@@ .
+ . | ",
" \\ . o @ @@@@ . @@ .
+ . / ",
" \\ @@@ @@@@@@ .
+ o / ",
" \\ @@@@@ @@\\@@ / O .
+ / ",
" \\ o @@@ \\ \\ / __ . .
+ .--. / ",
" \\ . . \\.-.---
+`--' / ",
" `. `-' .
+ .' ",
" `. o / | ` O .
+.' ",
" `-. / | o .-'
+ ",
" `-. . . .-'
+ ",
" `---. . .---'
+ ",
" `--------------'
+ "
],
'hubert29' => [ " .--------------.
+ ",
" .---' o . `---.
+ ",
" .-' . O . . `-
+. ",
" .-' @@@@@@ .
+ `-. ",
" .'@@ @@@@@@@@@@@ @@@@@@@ .
+ `. ",
" .'@@@ @@@@@ ___====-_ _-====___ @
+ `. ",
" /@@@ o _--~~~#####// \\\\#####~~~
+--_ O \\ ",
" / _-~##########// ( ) \\\\#######
+###~-_ . \\ ",
" /@ o -############// :\\^^/: \\\\#####
+#######- @@ \\ ",
" /@@@ _~############// (\@::@) \\\\####
+########~_ @@ \\ ",
" /@@@ ~#############(( \\\\// ))####
+#########~ @@ \\ ",
" |@@ -###############\\\\ (oo) //#####
+##########- @ | ",
" / @ -#################\\\\ / \"\" \\ //###
+##############- . \\",
" |@ -###################\\\\/ \\//######
+#############- |",
" | _#/:##########/\\######( /\\ )######/\
+\##########:\\#_ |",
" | :/ :#/\\#/\\#/\\/ \\#/\\##\\ : : /##/\
+\#/ \\/\\#/\\#/\\#: \\: |",
" \\ \" :/ V V \" V \\#\\: : : :/#/ V
+ \" V V \\: \" /",
" | @ \" \" \" \" / : : : : \\ \
+" \" \" \" | ",
" \\ . o @ @@@@ ( : : : : ) @@ .
+ . / ",
" \\ @@@ @@@@ __\\ : : : : /__
+ o / ",
" \\ @@@@@ @@\\@(vvv(VVV)(VVV)vvv)
+ . / ",
" \\ o @@@ \\ \\ / __ .
+. .--. / ",
" \\ . . \\.-.---
+ `--' / ",
" `. `-' .
+ .' ",
" `. o / | ` O .
+ .' ",
" `-. / | o
+ .-' ",
" `-. . . .-
+' ",
" `---. . .---'
+ ",
" `--------------'
+ "
],
'32' => [ " .--------------.
+ ",
" .----' o . `---
+-. ",
" .-' . O . .
+ `-. ",
" .-' @@@@@@ .
+ `-. ",
" .'@ @@@@@@@@@@@ @@@@@@@@
+ . `. ",
" .'@@ @@@@@@@@@@@@@@ @@@@@@@@@
+@ `. ",
" .'@@@ o @@@@@@@@@@@@@@ @@@@@@@@@
+@ o `. ",
" /@@@ @@@@@@@@@@@@@@ @ @@@@@@@@
+@@ @@ . \\ ",
" / @@@@@@@@@@@ . @@ @@@@@
+@@@@@@@ @@ \\ ",
" /@ o . @@@@@@ o @ @@@@@@
+@@@@@@@@ o @@@@ \\ ",
" /@@@ . @@@@@@
+@@@@@@@@@ @@@@@ \\ ",
" /@@@@@ @ . @@@@@
+@@@@@@@@@ @@@ \\ ",
" |@@@@@ o `.-./ . @@@@
+@@@@@@@@ @@@ . | ",
" / @@@@@ __`-' o @@
+ . @@@@@@ \\",
" |@ @@@@ . @ ` @ @@
+ . @@@@@@ |",
" | @@ @ o @@
+@ o @@@@@@. |",
" | @ @@@
+@@ @@@ |",
" | . . @ @ @ o @@@
+@@ . . |",
" \\ @ .-. . @
+@@ . . /",
" | @ @ @ @ `-'
+ . / ",
" \\ . @ @ .
+ o / ",
" \\ o @@@@ .
+. / ",
" \\ @@@ @@@@@@ .
+ o / ",
" \\ @@@@@ @@\\@@ / o
+ . / ",
" \\ o @@@ \\ \\ / ___
+. . .--. / ",
" `. . \\.-.---
+ `--' .' ",
" `. `-' .
+ .' ",
" `. o / | O
+ . .' ",
" `-. / | o
+ .-' ",
" `-. . .
+ .-' ",
" `----. . .---
+-' ",
" `--------------'
+ "
],
);
my(@qlits) = (
"New Moon + ",
"First Quarter +",
"Full Moon + ",
"Last Quarter + ",
);
my(@nqlits) = (
"New Moon - ",
"First Quarter -",
"Full Moon - ",
"Last Quarter - ",
);
# Find the length of the atfiller string.
my($atflrlen) = length( $atfiller );
# Figure out the phase.
my($jd) = unix_to_julian( $t );
my($pctphase,$cphase,$aom,$cdist,$cangdia, $csund, $csuang) = phas
+e($jd);
my($angphase) = $pctphase * 2.0 * PI;
my($mcap) = -cos( $angphase );
my($clocknow) = time;
# Randomly cheat and generate Hubert.
if ( time % 13 == 3 && $cphase > 0.8 ) {
$numlines = 29;
$clocknow = 3;
}
# Figure out how big the moon is.
my($yrad) = $numlines / 2.0;
my($xrad) = $yrad / ASPECTRATIO;
my($numcols) = $xrad * 2;
# Figure out some other random stuff.
my($midlin) = int($numlines / 2);
my($which,$phases) = phasehunt2($jd);
# Now output the moon, a slice at a time.
my($atflridx) = 0;
for ( my $lin = 0; $lin < $numlines; ++$lin ) {
# Compute the edges of this slice.
my($y) = $lin + 0.5 - $yrad;
my($xright) = $xrad * sqrt( 1.0 - ( $y * $y ) / ( $yrad * $yra
+d ) );
my($xleft) = -$xright;
if ( $angphase >= 0.0 && $angphase < PI ) {
$xleft = $mcap * $xleft;
} else {
$xright = $mcap * $xright;
}
my($colleft) = int($xrad + 0.5) + int($xleft + 0.5);
my($colright) = int($xrad + 0.5) + int($xright + 0.5);
# Now output the slice.
my($col) = 0;
for ( $col = 0; $col < $colleft; ++$col ) { print " "; }
for ( ; $col <= $colright; ++$col ) {
my($c) = '@';
if (exists($background{$numlines})) {
$c = substr($background{$numlines}->[$lin], $col, 1);
if ($numlines == 19 && (localtime(time))[4] == 9 && $clock
+now % (33 - (localtime(time))[3]) == 1) {
$c = substr($background{pumpkin19}->[$lin], $col, 1);
} elsif ($numlines == 29 && $clocknow % 23 == 3) {
$c = substr($background{hubert29}->[$lin], $col, 1);
}
}
if ($c ne '@') {
print $c;
} else {
print substr($atfiller,$atflridx++,1);
$atflridx %= $atflrlen;
}
}
if ( $numlines <= 27 ) {
# Output the end-of-line information, if any.
if ( $lin == $midlin - 2 ) {
print "\t" . $qlits[int($which->[0] * 4.0 + 0.001)];
} elsif ( $lin == $midlin - 1) {
print "\t" . putseconds(int(($jd - $phases->[0]) * SEC
+SPERDAY));
} elsif ( $lin == $midlin ) {
print "\t" . $nqlits[int($which->[1] * 4.0 + 0.001)];
} elsif ( $lin == $midlin + 1 ) {
print "\t" . putseconds(int(($phases->[1] - $jd) * SEC
+SPERDAY));
}
}
print "\n";
}
}
#
# main
#
my($numlines) = DEFAULTNUMLINES;
if ($ARGV[0] eq '-l') {
shift @ARGV;
if ($ARGV[0] == 0) { print $usage; exit 1; } # just in case the u
+ser types in "-l not_a_number"
$numlines = int(shift @ARGV) || DEFAULTNUMLINES;
}
my($t) = 0;
if (@ARGV >= 1 && @ARGV <= 3) { # date provided ?
$t = str2time(join(' ', @ARGV));
if (!defined($t)) { print $usage; exit 1; }
} elsif (@ARGV == 0) {
$t = time;
} else {
print $usage; exit 1;
}
# Pseudo-randomly decide what the moon is made of, and print it.
if (time % 17 == 3) {
putmoon($t, $numlines, 'GREENCHEESE');
} else {
putmoon($t, $numlines, '@');
}
exit 0;
__END__
=head1 NAME
phoon - show the PHase of the mOON
=head1 SYNOPSIS
phoon [-l lines] [date]
=head1 DESCRIPTION
I<Phoon> displays the phase of the moon, either currently
or at a specified date / time.
Unlike other such programs, which just tell you how long since first q
+uarter
or something like that, phoon I<shows> you the phase with a cute littl
+e picture.
You can vary the size of the picture with the -l flag, but only some
sizes have pictures defined - other sizes use @'s.
The perl version is a direct translation of the original C version, an
+d
includes all of the features, moon images and Easter eggs of the origi
+nal
program.
=head1 SEE ALSO
perl(1).
=head1 AUTHOR
Translated from Jef Poskanzer's original phoon.c and John Walker's
moontool.c by James Allenspach E<lt>jima@legnog.comE<gt>. See the sour
+ce of
the program for copyright information.
=cut
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