tetris/tetris.6

   1 .\"     $NetBSD: tetris.6,v 1.6 1999/01/03 17:13:51 hubertf Exp $
   2 .\"
   3 .\" Copyright (c) 1992, 1993
   4 .\"     The Regents of the University of California.  All rights reserved.
   5 .\"
   6 .\" This code is derived from software contributed to Berkeley by
   7 .\" Nancy L. Tinkham and Darren F. Provine.
   8 .\"
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  10 .\" modification, are permitted provided that the following conditions
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  13 .\"    notice, this list of conditions and the following disclaimer.
  14 .\" 2. Redistributions in binary form must reproduce the above copyright
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  17 .\" 3. All advertising materials mentioning features or use of this software
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  19 .\"     This product includes software developed by the University of
  20 .\"     California, Berkeley and its contributors.
  21 .\" 4. Neither the name of the University nor the names of its contributors
  22 .\"    may be used to endorse or promote products derived from this software
  23 .\"    without specific prior written permission.
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  25 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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  36 .\"
  37 .\"     @(#)tetris.6    8.1 (Berkeley) 5/31/93
  38 .\"
  39 .Dd May 31, 1993
  40 .Dt TETRIS 6
  41 .Os
  42 .Sh NAME
  43 .Nm tetris
  44 .Nd the game of tetris
  45 .Sh SYNOPSIS
  46 .Nm
  47 .Op Fl ps
  48 .Op Fl k Ar keys
  49 .Op Fl l Ar level
  50 .Sh DESCRIPTION
  51 The
  52 .Nm
  53 command runs display-based game which must be played on a CRT terminal.
  54 The object is to fit the shapes together forming complete rows,
  55 which then vanish.
  56 When the shapes fill up to the top, the game ends.
  57 You can optionally select a level of play, or custom-select control keys.
  58 .Pp
  59 The default level of play is 2.
  60 .Pp
  61 The default control keys are as follows:
  62 .Pp
  63 .Bl -tag -width "<space>" -compact -offset indent
  64 .It j
  65 move left
  66 .It k
  67 rotate 1/4 turn counterclockwise
  68 .It l
  69 move right
  70 .It <space>
  71 drop
  72 .It p
  73 pause
  74 .It q
  75 quit
  76 .El
  77 .Pp
  78 The options are as follows:
  79 .Bl -tag -width indent
  80 .It Fl k
  81 The default control keys can be changed using the
  82 .Fl k
  83 option.
  84 The
  85 .Ar keys
  86 argument must have the six keys in order, and, remember to quote any
  87 space or tab characters from the shell.
  88 For example:
  89 .sp
  90 .Dl "tetris -l 2 -k 'jkl pq'"
  91 .sp
  92 will play the default games, i.e. level 2 and with the default
  93 control keys.
  94 The current key settings are displayed at the bottom of the screen
  95 during play.
  96 .It Fl l
  97 Select a level of play.
  98 .It Fl s
  99 Display the top scores.
 100 .It Fl p
 101 Switch on previewing of the shape that will appear next.
 102 .El
 103 .Pp
 104 .Sh PLAY
 105 At the start of the game, a shape will appear at the top of the screen,
 106 falling one square at a time.
 107 The speed at which it falls is determined directly by the level:
 108 if you select level 2, the blocks will fall twice per second;
 109 at level 9, they fall 9 times per second.
 110 (As the game goes on, things speed up,
 111 no matter what your initial selection.)
 112 When this shape
 113 .Dq "touches down"
 114 on the bottom of the field, another will appear at the top.
 115 .Pp
 116 You can move shapes to the left or right, rotate them counterclockwise,
 117 or drop them to the bottom by pressing the appropriate keys.
 118 As you fit them together, completed horizontal rows vanish,
 119 and any blocks above fall down to fill in.
 120 When the blocks stack up to the top of the screen, the game is over.
 121 .Sh SCORING
 122 You get one point for every block you fit into the stack,
 123 and one point for every space a block falls when you hit the drop key.
 124 (Dropping the blocks is therefore a good way to increase your score.)
 125 Your total score is the product of the level of play
 126 and your accumulated
 127 .ie t points\(em200
 128 .el points -- 200
 129 points on level 3 gives you a score of 600.
 130 Each player gets at most one entry on any level,
 131 for a total of nine scores in the high scores file.
 132 Players who no longer have accounts are limited to one score.
 133 Also, scores over 5 years old are expired.
 134 The exception to these conditions is that the highest score on a given
 135 level is
 136 .Em always
 137 kept,
 138 so that following generations can pay homage to those who have
 139 wasted serious amounts of time.
 140 .Pp
 141 The score list is produced at the end of the game.
 142 The printout includes each player's overall ranking,
 143 name, score, and how many points were scored on what level.
 144 Scores which are the highest on a given level
 145 are marked with asterisks
 146 .Dq * .
 147 .Sh FILES
 148 .Bl -tag -width /var/games/tetris.scoresxx
 149 .It /var/games/tetris.scores
 150 high score file
 151 .El
 152 .Sh BUGS
 153 The higher levels are unplayable without a fast terminal connection.
 154 .Sh AUTHORS
 155 Adapted from a 1989 International Obfuscated C Code Contest winner by
 156 Chris Torek and Darren F. Provine.
 157 .Pp
 158 Manual adapted from the original entry written by Nancy L. Tinkham and
 159 Darren F. Provine.
 160 .Pp
 161 Code for previewing next shape added by Hubert Feyrer in 1999.