atc.6

早期freebsd实现

.\" Copyright (c) 1990, 1993
.\"	The Regents of the University of California.  All rights reserved.
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.\" This code is derived from software contributed to Berkeley by
.\" Ed James.
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.\"	@(#)atc.6	8.1 (Berkeley) 5/31/93
.\"
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.de XP
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.if \\n(1T .sp \\n(PDu
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.\" Copyright (c) 1986 Ed James. All rights reserved. 
.\"
.TH ATC 6 "May 31, 1993"
.UC
.SH NAME
atc \- air traffic controller game
.SH SYNOPSIS
.B atc
-[u?lstp] [-[gf] game_name] [-r random seed]
.SH DESCRIPTION
.LP
.I Atc
lets you try your hand at the nerve wracking duties of the air traffic
controller without endangering the lives of millions of
travelers each year.
Your responsibilities require you to direct the flight of jets
and prop planes into and out of the flight arena and airports.
The speed (update time) and frequency of the planes depend on the
difficulty of the chosen arena.
.SH OPTIONS
.LP
.TP 8
.B \-u
Print the usage line and exit.
.TP
.B \-?
Same as
.B \-u.
.TP
.B \-l
Print a list of available games and exit.
The first game name printed is the default game.
.TP
.B \-s
Print the score list (formerly the Top Ten list).
.TP
.B \-t
Same as
.B \-s.
.TP
.B \-p
Print the path to the special directory where 
.I atc
expects to find its private files.  This is used during the
installation of the program.
.TP
.B "\-g game"
Play the named game.  If the game listed is not one of the
ones printed from the 
.B \-l
option, the default game is played.
.TP
.B "\-f game"
Same as
.B \-g.
.TP
.B "\-r seed"
Set the random seed.  The purpose of this flag is questionable.
.SH GOALS
.LP
Your goal in 
.I atc
is to keep the game going as long as possible.  
There is no winning state, except to beat the times of other players.
You will need to: launch planes at airports (by instructing them to
increase their altitude); land planes at airports (by instructing them to
go to altitude zero when exactly over the airport); and maneuver planes
out of exit points.  
.LP
Several things will cause the end of the game.
Each plane has a destination (see information area), and 
sending a plane to the wrong destination is an error.
Planes can run out of fuel, or can collide.  Collision is defined as
adjacency in any of the three dimensions.  A plane leaving the arena
in any other way than through its destination exit is an error as well.
.LP
Scores are sorted in order of the number of planes safe.  The other
statistics are provided merely for fun.  There is no penalty for 
taking longer than another player (except in the case of ties).
.LP
Suspending a game is not permitted.  If you get a talk message, tough.
When was the last time an Air Traffic Controller got called away to
the phone? 
.SH "THE DISPLAY"
.LP
Depending on the terminal you run 
.I atc
on, the screen will be divided into 4 areas. 
It should be stressed that the terminal driver portion of the
game was designed to be reconfigurable, so the display format can vary
depending the version you are playing.  The descriptions here are based 
on the ascii version
of the game.  The game rules and input format, however,
should remain consistent.
Control-L redraws the screen, should it become muddled.
.SS RADAR
.IP
The first screen area is the radar display, showing the relative locations
of the planes, airports, standard entry/exit points, radar
beacons, and "lines" which simply serve to aid you in guiding
the planes. 
.IP
Planes are shown as a single letter with an altitude.  If
the numerical altitude is a single digit, then it represents
thousands of feet.
Some distinction is made between the prop
planes and the jets.  On ascii terminals, prop planes are
represented by a upper case letter, jets by a lower case letter.
.IP
Airports are shown as a number and some indication of the direction
planes must be going to land at the airport.  
On ascii terminals, this is one of '^', '>', '<', and 'v', to indicate
north (0 degrees), east (90), west (270) and south (180), respectively.
The planes will also
take off in this direction.
.IP
Beacons are represented as circles or asterisks and a number.
Their purpose is to offer a place of easy reference to the plane pilots.
See 'the delay command' under the input section of this manual.
.IP
Entry/exit points are displayed as numbers along the border of the 
radar screen.  Planes will enter the arena from these points without
warning.  These points have a direction associated with them, and 
planes will always enter the arena from this direction.  On the
ascii version of
.I atc,
this direction is not displayed.  It will become apparent
what this direction is as the game progresses.
.IP
Incoming planes will always enter at the same altitude: 7000 feet.
For a plane to successfully depart through an entry/exit point, 
it must be flying at 9000 feet.
It is not necessary for the planes to be flying in any particular
direction when they leave the arena (yet).
.SS "INFORMATION AREA"
.IP
The second area of the display is the information area, which lists
the time (number of updates since start), and the number of planes you
have directed safely out of the arena.
Below this is a list of planes currently in the air, followed by a 
blank line, and then a list of planes on the ground (at airports).
Each line lists the plane name and its current altitude, 
an optional asterisk indicating low fuel, the plane's destination,
and the plane's current command.  Changing altitude is not considered
to be a command and is therefore not displayed.  The following are 
some possible information lines:
.IP
	B4*A0: Circle @ b1
.br
	g7 E4: 225
.IP
The first example shows a prop plane named 'B' that is flying at 4000
feet.  It is low on fuel (note the '*').  It's destination is
Airport #0.
The next command it expects
to do is circle when it reaches Beacon #1.
The second example shows a jet named 'g' at 7000 feet, destined for 
Exit #4.  It is just now executing a turn to 225 degrees (South-West).
.SS "INPUT AREA"
.IP
The third area of the display is the input area.  It is here that 
your input is reflected.  See the INPUT heading of this manual
for more details.
.SS "AUTHOR AREA"
.IP
This area is used simply to give credit where credit is due. :-)
.SH INPUT
.LP
A command completion interface is built into
the game.  At any time, typing '?' will list possible input characters.
Typing a backspace (your erase character) backs up, erasing the last part
of the command.  When a command is complete, a return enters it, and 
any semantic checking is done at that time.  If no errors are detected,
the command is sent to the appropriate plane.  If an error is discovered
during the check, the offending statement will be underscored and a
(hopefully) descriptive message will be printed under it.
.LP
The command syntax is broken into two parts:
.I "Immediate Only"
and 
.I Delayable
commands.
.I "Immediate Only"
commands happen on the next
update.  
.I Delayable
commands also happen on the next update unless they
are followed by an optional predicate called the 
.I Delay 
command.
.LP
In the following tables, the syntax 
.B [0\-9]
means any single digit, and 
.B <dir>
refers to the keys around the 's' key, namely ``wedcxzaq''.
In absolute references, 'q' refers to North-West or 315 degrees, and 'w'
refers to North, or 0 degrees.  
In relative references, 'q' refers to -45 degrees or 45 degrees left, and 'w'
refers to 0 degrees, or no change in direction.
.LP
All commands start with a plane letter.  This indicates the recipient
of the command.  Case is ignored.
.SS "IMMEDIATE ONLY COMMANDS"
.RS
.B "\- a Altitude:"
.RS
Affect a plane's altitude (and take off).
.RE
.RS
.B "\- [0\-9] Number:"
.RS
Go to the given altitude (thousands of feet).
.RE
.B "\- c/+ Climb:"
.RS
Relative altitude change.
.RE
.RS
.B "\- [0\-9] Number:"
.RS
Difference in thousands of feet.
.RE
.RE
.B "\- d/\- Descend:"
.RS
Relative altitude change.
.RE
.RS
.B "\- [0\-9] Number:"
.RS
Difference in thousands of feet.
.RE
.RE
.RE
.B "\- m Mark:"
.RS
Display in highlighted mode.  Command is displayed normally.
.RE
.B "\- i Ignore:"
.RS
Do not display highlighted.  Command is displayed as a
line of dashes if there is no command.
.RE
.B "\- u Unmark:"
.RS
Same as ignore, but if a delayed command is processed, 
the plane will become marked.  This is useful if you want
to forget about a plane during part, but not all, of its
journey.
.RE
.RE
.SS "DELAYABLE COMMANDS"
.RS
.B "\- c Circle:"