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impulse.c revision 1.2 
      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: @(#)impulse.c	5.4 (Berkeley) 6/1/90";*/
     36 static char rcsid[] = "$Id: impulse.c,v 1.2 1993/08/01 18:50:27 mycroft Exp $";
     37 #endif /* not lint */
     38 
     39 # include	"trek.h"
     40 
     41 /**
     42  **	move under impulse power
     43  **/
     44 
     45 impulse()
     46 {
     47 	int			course;
     48 	register int		power;
     49 	double			dist, time;
     50 	register int		percent;
     51 	extern double		move();
     52 
     53 	if (Ship.cond == DOCKED)
     54 		return (printf("Scotty: Sorry captain, but we are still docked.\n"));
     55 	if (damaged(IMPULSE))
     56 		return (out(IMPULSE));
     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 	{
     63 		printf("Scotty: That would consume %d%% of our remaining energy.\n",
     64 			percent);
     65 		if (!getynpar("Are you sure that is wise"))
     66 			return;
     67 		printf("Aye aye, sir\n");
     68 	}
     69 	time = dist / 0.095;
     70 	percent = 100 * time / Now.time + 0.5;
     71 	if (percent >= 85)
     72 	{
     73 		printf("Spock: That would take %d%% of our remaining time.\n",
     74 			percent);
     75 		if (!getynpar("Are you sure that is wise"))
     76 			return;
     77 		printf("(He's finally gone mad)\n");
     78 	}
     79 	Move.time = move(0, course, time, 0.095);
     80 	Ship.energy -= 20 + 100 * Move.time * 0.095;
     81 }
     82