trek/setwarp.c

   1 /*
   2  * Copyright (c) 1980 Regents of the University of California.
   3  * 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
  34 #ifndef lint
  35 /*static char sccsid[] = "from: @(#)setwarp.c   5.4 (Berkeley) 6/1/90";*/
  36 static char rcsid[] = "$Id: setwarp.c,v 1.2 1993/08/01 18:49:59 mycroft Exp $";
  37 #endif /* not lint */
  38
  39 # include       "trek.h"
  40 # include       "getpar.h"
  41
  42 /*
  43 **  SET WARP FACTOR
  44 **
  45 **      The warp factor is set for future move commands.  It is
  46 **      checked for consistancy.
  47 */
  48
  49 setwarp()
  50 {
  51         double  warpfac;
  52
  53         warpfac = getfltpar("Warp factor");
  54         if (warpfac < 0.0)
  55                 return;
  56         if (warpfac < 1.0)
  57                 return (printf("Minimum warp speed is 1.0\n"));
  58         if (warpfac > 10.0)
  59                 return (printf("Maximum speed is warp 10.0\n"));
  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 }