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Man Pages


Manual Reference Pages  -  XPHOON (1)

NAME

xphoon - displays the PHase of the mOON on the root window

CONTENTS

Synopsis
Description
Options
Notes
Authors

SYNOPSIS

xphoon [-b] [-t interval [-i]] [-s] [-display name]

DESCRIPTION

Xphoon sets the X root window to a picture of the moon in its current phase, including the partial lighting of the dark side by reflected earthlight.

OPTIONS

-b Defeats the earthlight feature, forcing the dark side to be black.
-t Have xphoon keep running and update the picture every interval minutes. (Normally, xphoon just sets the root picture and exits.)
-i Forks a background process and prints the process-id to stdout. Useful if you want to make menu commands to refresh or kill xphoon.
-s Rotate the whole picture 180 degrees, resulting in a moon picture as viewed fom the Southern hemisphere.
-demo Demonstrate xphoon by rapidly stepping through moon phases.

NOTES

The original motivation for this program was that xsetroot was too slow. Loading a full-screen bitmap took about 15 seconds. We made a trivial program that had fullmoon.bitmap compiled in, and it ran in less than a second. (And incidentally, the executable was smaller than fullmoon.xbm.) Then later we came up with the phase hacking, the earthlight, and the auto-scaling.

SEE ALSO

phoon(1), xsetroot(1)

AUTHORS

Copyright (C) 1988, 1991 by Jef Poskanzer and Craig Leres.

The moon-phase computation is from "moontool.c" by John Walker.

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--> XPHOON (1) 6 April 1999

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