243 lines
7.1 KiB
Groff
243 lines
7.1 KiB
Groff
.TH WMGlobe 1 "fevrier 1999"
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.SH NAME
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WMGlobe - The Whole Earth spinning on you desktop...
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as a dockable app for WindowMaker
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.SH SYNOPSIS
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.B wmglobe
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.I "[-options]"
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.SH "DESCRIPTION"
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WMGlobe is a WindowMaker dock.app that displays the earth on an icon. It's
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an adaptation of XGlobe to WMaker environnement. WMGlobe uses a map which is
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rendered on a sphere by raytracing. Yes, for a 64x64 pixel result:-)
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.SH "OPTIONS"
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.TP
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.B \-v
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version. Currently, this should display :
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WMGlobe v.0.5 6 fev 1999 <jerome.dumonteil@capway.com>
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.TP
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.B \-h
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short help
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.TP
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.B \-zoom \fI zoom_value\fP
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Value > 1 to magnify the view, value < 1 to lower. Default: 1.0
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.TP
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.B \-pos \fI latitude longitude\fP
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Initial viewing fixed at this position, don't follow
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the sun rotation. Accepted values in the form 45°12'36 or 45.21 or 45:12:36 .
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Default: the initial position is "under" the sun, and
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the point of view follows the sun.
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.TP
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.B \-rand
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New random position at every refresh of screen.
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.TP
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.B \-map \fI map_file\fP
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Map used for the rendering. Can be JPEG, GIG, XPM
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PNM, TIFF but none BMP.
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Default: use internal map of earth.
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.TP
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.B \-nimap \fI night_file\fP
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Map used for the dark side of the earth. Must be of
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the same width x height as the day side map.
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Default: if the default internal day map is used, use
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a default internal night file (see -nonimap option).
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If a custom day map is provided, and no night map, the
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dark side is computed via the -light option.
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.TP
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.B \-nonimap
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Don't use the default night map.
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.TP
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.B \-delay \fI seconds\fP
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Time in seconds between each calculation of a new
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position. Limited to 0.04 at compile time (25 frames
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per second should be enough). The sun position move
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only once per minute, so if you use wmglobe without
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-dlong or -accel option, the CPU cost of WMGlobe is
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*very* low. The use of very low value for -delay plus
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-dlong and -accel can be CPU costly (but very nice...).
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Default: 1.0 sec.
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.TP
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.B \-dlat \fI delta_latitude\fP
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Move the point of view by delta_lat degrees per second,
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with a value of 6 the earth make a full rotation in
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one minute. The value can be formated as -pos option.
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Default: 0°0'0
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.TP
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.B \-dlong \fI delta_long\fP
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Move the point of view by delta_long degrees per
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second. With a value of -0°0'15" the earth make a full
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rotation in 24 hours toward the west. By default,
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-dlong and -dlat are null. If they are used, the view
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follow their values. Going back to "follow sun" mode
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in parameters screen put -dlat and -dlong to zero.
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.TP
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.B \-light \fI light_value\fP
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Level of light of the dark side when there is no
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night map, from 0 to 1.
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Default: 0.25
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.TP
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.B \-dawn \fI dawn_value\fP
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Level of continuity for dawn limit, from 0 to 1. With
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a value of 1, the border line between night and day is
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at maximum contrast.
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Default: 0.2
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.TP
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.B \-bord \fI border_num\fP
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0 1 or 2. There are 3 different borders for the icon.
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Default: 0
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.TP
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.B \-accel \fI time_multi\fP
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Time warp factor. With -accel 24, the sun make a full
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rotation in one hour (or the earth, I'm not sure). Default: 1.0
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.TP
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.B \-time \fI seconds\fP
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Time to display in seconds since 01-01-1970 (see the
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date command). Necessary if you need to be sure that
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WMGlobe is Y2K compliant without changing system time.
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Negative values for dates before 1970 accepted.
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Default: not set, use current time.
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.TP
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.B \-fun \fI dx dy\fP
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Move the earth image by dx dy pixels in the icon. See
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puzzle.sh to understand why.
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.TP
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.B \-oz
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Start in "austral" mode (for "down under" people)
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.TP
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.B \-d \fI display\fP
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Select another display
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.TP
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.B \-w \-shape
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Useless, since it is set by default (WMaker dockable
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application)
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.SH "MOUSE OPTIONS"
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.TP
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.B left button
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Change longitude while pressed, change longitude &
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latitude if shift+left button.
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.TP
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.B middle button
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Zoom in, shift + middle button: zoom out
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.TP
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.B right button
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Displays 7 screens of parameters. On every screen, just
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clic with left or right button on the figures to change
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their value. The TIME screen shows an approximation
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of date and time of the earth zone currently displayed,
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using GMT time + longitude offset, it's close to the
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real local time by one or two hours. Others options
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don't need more help. Intuitive they said...
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.SH "FILES"
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.TP
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.B MAPS
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Like XGlobe, WMGlobe needs a longitude/latitude map to work. By default,
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it uses a low quality built-in map of earth. But you will probably want
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to use better ones.
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You can get maps usable with WMGlobe on the net. See the links below.
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using custom maps:
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For the image to be mapped correctly, position 0°North 0°West must be in
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the center of the image and the latitude must be linear from 90°N to 90°S.
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When using a night map, make sure that day and night map have the same
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dimensions.
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.TP
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.B Links: Where to find maps and similar softs
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where to find the sources of wmglobe:
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the web page of WMGlobe (made by Sylvestre Taburet):
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<http://www.capway.com/dumonte1/wm/wmg.html>
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where to find maps and similar softs:
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Earth image by a cgi:
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<http://www.fourmilab.ch/cgi-bin/uncgi/Earth>
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two softs running under X:
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XGlobe Homepage: (many links to map of earth)
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<http://www.uni-karlsruhe.de/~uddn/xglobe>
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Xearth Homepage:
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<http://www.cs.colorado.edu/~tuna/xearth/>
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By the way, you can use maps of Mars, Luna ... and text.
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.SH "ENVIRONMENT"
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.LP
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WMGlobe uses the setlocale(3) function, so you LANG environment need to be ok.
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You need WindowMaker 0.20.3 or 0.51.0 installed to use WMGlobe.
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.SH "SEE ALSO"
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.LP
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The Window Maker User Guide
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The Window Maker FAQ
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.SH "AUTHOR"
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jerome dumonteil <jerome.dumonteil@capway.com>
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Patches, bug reports, and suggestions are welcome.
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.SH "CREDITS"
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WMGlobe is Copyright (C) 1998,99 by Jerome Dumonteil and licensed through
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the GNU General Public License.
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Read the COPYING file for the complete GNU license.
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Original idea, tests, logos:
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Sylvestre Taburet <staburet@consort.fr>
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The code in 'sunpos.cpp' is taken from Xearth by Kirk Lauritz Johnson.
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/*
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sunpos.c
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kirk johnson
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july 1993
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code for calculating the position on the earth's surface for which
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the sun is directly overhead (adapted from _practical astronomy
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with your calculator, third edition_, peter duffett-smith,
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cambridge university press, 1988.)
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Copyright (C) 1989, 1990, 1993, 1994, 1995 Kirk Lauritz Johnson
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Parts of the source code (as marked) are:
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Copyright (C) 1989, 1990, 1991 by Jim Frost
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Copyright (C) 1992 by Jamie Zawinski <jwz@lucid.com>
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Permission to use, copy, modify and freely distribute xearth for
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non-commercial and not-for-profit purposes is hereby granted
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without fee, provided that both the above copyright notice and this
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permission notice appear in all copies and in supporting
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documentation.
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*/
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The rendering engine is taken from XGlobe by Thorsten Scheuermann
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XGlobe Homepage: http://www.uni-karlsruhe.de/~uddn/xglobe
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Raster graphics library by Alfredo K. Kojima, & stuff of Window Maker
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<http://windowmaker.org> by A. K. Kojima, Dan Pascu, Matthew Hawkins & team
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.SH "BUGS"
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.LP
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If you use the --enable-single-icon compile time option of WindowMaker,
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you can not display more than one WMGlobe.
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WMGlobe hopes that an overflow of a long integer dont generate an error
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and that LONG_MAX +1 = LONG_MIN . This happens with high values of -accel
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when the date go over year 2038. The expected result is wmglobe
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continuing smoothly from 1901.
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