games/trek/impulse.c

   1 /*
   2  * Copyright (c) 1980, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)impulse.c        8.1 (Berkeley) 5/31/93
  34  * $FreeBSD: src/games/trek/impulse.c,v 1.4 1999/11/30 03:49:48 billf Exp $
  35  * $DragonFly: src/games/trek/impulse.c,v 1.3 2006/09/07 21:19:44 pavalos Exp $
  36  */
  37
  38 # include       "getpar.h"
  39 # include       "trek.h"
  40
  41 /**
  42  **     move under impulse power
  43  **/
  44
  45 void
  46 impulse(__unused int unused)
  47 {
  48         int                     course;
  49         int             power;
  50         double                  dist, p_time;
  51         int             percent;
  52
  53         if (Ship.cond == DOCKED) {
  54                 printf("Scotty: Sorry captain, but we are still docked.\n");
  55                 return;
  56         }
  57         if (damaged(IMPULSE)) {
  58                 out(IMPULSE);
  59                 return;
  60         }
  61         if (getcodi(&course, &dist))
  62                 return;
  63         power = 20 + 100 * dist;
  64         percent = 100 * power / Ship.energy + 0.5;
  65         if (percent >= 85)
  66         {
  67                 printf("Scotty: That would consume %d%% of our remaining energy.\n",
  68                         percent);
  69                 if (!getynpar("Are you sure that is wise"))
  70                         return;
  71                 printf("Aye aye, sir\n");
  72         }
  73         p_time = dist / 0.095;
  74         percent = 100 * p_time / Now.time + 0.5;
  75         if (percent >= 85)
  76         {
  77                 printf("Spock: That would take %d%% of our remaining time.\n",
  78                         percent);
  79                 if (!getynpar("Are you sure that is wise"))
  80                         return;
  81                 printf("(He's finally gone mad)\n");
  82         }
  83         Move.time = move(0, course, p_time, 0.095);
  84         Ship.energy -= 20 + 100 * Move.time * 0.095;
  85 }