games/trek/setwarp.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  * @(#)setwarp.c        8.1 (Berkeley) 5/31/93
  30  * $FreeBSD: src/games/trek/setwarp.c,v 1.2 1999/11/30 03:49:54 billf Exp $
  31  * $DragonFly: src/games/trek/setwarp.c,v 1.3 2006/09/07 21:19:44 pavalos Exp $
  32  */
  33
  34 #include "trek.h"
  35 #include "getpar.h"
  36
  37 /*
  38 **  SET WARP FACTOR
  39 **
  40 **      The warp factor is set for future move commands.  It is
  41 **      checked for consistancy.
  42 */
  43
  44 void
  45 setwarp(int v __unused)
  46 {
  47         double  warpfac;
  48
  49         warpfac = getfltpar("Warp factor");
  50         if (warpfac < 0.0)
  51                 return;
  52         if (warpfac < 1.0) {
  53                 printf("Minimum warp speed is 1.0\n");
  54                 return;
  55         }
  56         if (warpfac > 10.0) {
  57                 printf("Maximum speed is warp 10.0\n");
  58                 return;
  59         }
  60         if (warpfac > 6.0)
  61                 printf("Damage to warp engines may occur above warp 6.0\n");
  62         Ship.warp = warpfac;
  63         Ship.warp2 = Ship.warp * warpfac;
  64         Ship.warp3 = Ship.warp2 * warpfac;
  65 }