atc.6

早期freebsd实现

.RS
Have the plane circle (clockwise by default).
.RE
.RS
.B "\- l Left:"
.RS
Circle counterclockwise.
.RE
.B "\- r Right:"
.RS
Circle clockwise.
.RE
.RE
.B "\- t Turn:"
.RS
Change direction.
.RE
.RS
.B "\- l Left:"
.RS
Turn counterclockwise (45 degrees by default).
.RE
.RS
.B "\- <dir> Direction:"
.RS
Turn ccw the given number of degrees.
Zero degrees is no turn.  A ccw turn
of -45 degrees is 45 cw.
.RE
.RE
.B "\- r Right:"
.RS
Turn clockwise (45 degrees by default).
.RE
.RS
.B "\- <dir> Direction:"
.RS
Same as turn left <dir>.
.RE
.RE
.B "\- L Left 90:"
.RS
Turn counterclockwise 90 degrees.
.RE
.B "\- R Right 90:"
.RS
Turn clockwise 90 degrees.
.RE
.B "\- <dir> Direction:"
.RS
Turn to the absolute compass heading given.
The shortest turn will be taken.
.RE
.B "\- t Towards:"
.RS
Turn towards a beacon, airport or exit.  The turn is
just an estimate.
.RE
.RS
.B "\- b/* Beacon:"
.RS
Turn towards the beacon.
.RE
.RS
.B "\- [0-9] Number:"
.RS
The beacon number.
.RE
.RE
.B "\- e Exit:"
.RS
Turn towards the exit.
.RE
.RS
.B "\- [0-9] Number:"
.RS
The exit number.
.RE
.RE
.B "\- a Airport:"
.RS
Turn towards the airport.
.RE
.RS
.B "\- [0-9] Number:"
.RS
The airport number.
.RE
.RE
.RE
.RE
.RE
.SS THE DELAY COMMAND
.LP
The 
.B Delay
(a/@)
command may be appended to any 
.B Delayable 
command.  It allows the controller to instruct a plane to do an action
when the plane reaches a particular beacon (or other objects in future
versions).
.sp
.RS
.B "\- a/@ At:"
.RS
Do the given delayable command when the plane reaches the given beacon.
.RE
.RS
.B "\- b/* Beacon:"
.RS
This is redundant to allow for expansion.
.RE
.RS
.B "\- [0-9] Number:"
.RS
The beacon number.
.RE
.RE
.RE
.RE
.SS "MARKING, UNMARKING AND IGNORING"
.LP
Planes are 
.B marked
when they enter the arena.  This means they are displayed in highlighted
mode on the radar display.  A plane may also be either 
.B unmarked
or
.B ignored.
An
.B unmarked
plane is drawn in unhighlighted mode, and a line of dashes is displayed in
the command field of the information area.  The plane will remain this
way until a mark command has been issued.  Any other command will be issued,
but the command line will return to a line of dashes when the command
is completed.  
.LP
An
.B ignored
plane is treated the same as an unmarked plane, except that it will
automatically switch to 
.B marked
status when a delayed command has been processed.  This is useful if
you want to forget about a plane for a while, but its flight path has
not yet been completely set.
.LP
As with all of the commands, marking, unmarking and ignoring will take effect 
at the beginning of the next update.  Do not be surprised if the plane does
not immediately switch to unhighlighted mode.
.SS EXAMPLES
.RS
.TP 16
atlab1
a: turn left at beacon #1
.TP 16
cc
C: circle
.TP 16
gtte4ab2
g: turn towards exit #4 at beacon #2
.TP 16
ma+2
m: altitude: climb 2000 feet
.TP 16
stq
S: turn to 315
.TP 16
xi
x: ignore
.RE
.SH "OTHER INFORMATION"
.LP
Jets move every update; prop planes move every other update.
.LP
All planes turn a most 90 degrees per movement.
.LP
Planes enter at 7000 feet and leave at 9000 feet.
.LP
Planes flying at an altitude of 0 crash if they are not over an airport.
.LP
Planes waiting at airports can only be told to take off (climb in altitude).
.SH "NEW GAMES"
.LP
The 
.B Game_List
file lists the currently available play fields.  New field description
file names must be placed in this file to be 'playable'.  If a player
specifies a game not in this file, his score will not be logged.
.LP
The game field description files are broken into two parts.  The first
part is the definition section.  Here, the four tunable game parameters
must be set.  These variables are set with the syntax:
.IP
variable = number;
.LP
Variable may be one of: 
.B update,
indicating the number of seconds between forced updates;
.B newplane,
indicating (about) the number of updates between new plane entries;
.B width,
indicating the width of the play field; and
.B height,
indicating the height of the play field.
.LP
The second part of the field description files describes the locations
of the exits, the beacons, the airports and the lines.
The syntax is as follows:
.IP
beacon:	(x y) ... ;
.br
airport:	(x y direction) ... ;
.br
exit:	(x y direction) ... ;
.br
line:	[ (x1 y1) (x2 y2) ] ... ;
.LP
For beacons, a simple x, y coordinate pair is used (enclosed in parenthesis).
Airports and exits require a third value, a direction, which is one
of 
.B wedcxzaq.
For airports, this is the direction that planes must be going to take
off and land, and for exits, this is the direction that planes will going
when they
.B enter
the arena.  This may not seem intuitive, but as there is no restriction on
direction of exit, this is appropriate.
Lines are slightly different, since they need two coordinate pairs to
specify the line endpoints.  These endpoints must be enclosed in 
square brackets.
.LP
All statements are semi-colon (;) terminated.  Multiple item statements
accumulate.  Each definition must occur exactly once, before any
item statements.  Comments begin with a hash (#) symbol
and terminate with a newline.
The coordinates are between zero and width-1 and height-1
inclusive.  All of the exit coordinates must lie on the borders, and
all of the beacons and airports must lie inside of the borders.
Line endpoints may be anywhere within the field, so long as 
the lines are horizontal, vertical or 
.B "exactly diagonal."
.SS "FIELD FILE EXAMPLE"
.RS
.sp
.nf
.TA 1i 1i
.ta 1i 1i
# This is the default game.

update = 5;
newplane = 5;
width = 30;
height = 21;

exit:		( 12  0 x ) ( 29  0 z ) ( 29  7 a ) ( 29 17 a )
		(  9 20 e ) (  0 13 d ) (  0  7 d ) (  0  0 c ) ;

beacon:		( 12  7 ) ( 12 17 ) ;

airport:	( 20 15 w ) ( 20 18 d ) ;

line:		[ (  1  1 ) (  6  6 ) ]
		[ ( 12  1 ) ( 12  6 ) ]
		[ ( 13  7 ) ( 28  7 ) ]
		[ ( 28  1 ) ( 13 16 ) ]
		[ (  1 13 ) ( 11 13 ) ]
		[ ( 12  8 ) ( 12 16 ) ]
		[ ( 11 18 ) ( 10 19 ) ]
		[ ( 13 17 ) ( 28 17 ) ]
		[ (  1  7 ) ( 11  7 ) ] ;
.fi
.RE
.SH FILES
.LP
Files are kept in a special directory. See the OPTIONS for a way to 
print this path out.
.TP 16
.B ATC_score
Where the scores are kept.
.TP 16
.B Game_List
The list of playable games.
.SH AUTHOR
.LP
Ed James, UC Berkeley: [e-mail], ucbvax!edjames
.LP
This game is based on someone's description of the overall flavor
of a game written for some unknown PC many years ago, maybe.
.SH BUGS
.LP
The screen sometimes refreshes after you have quit.
.LP
Yet Another Curses Bug was discovered during the development of this game.
If your curses library clrtobot.o is version 5.1 or earlier, 
you will have erase problems with the backspace operator in the input
window.