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