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impulse.c revision 1.1 
      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[] = "@(#)impulse.c	5.4 (Berkeley) 6/1/90";
     36 #endif /* not lint */
     37 
     38 # include	"trek.h"
     39 
     40 /**
     41  **	move under impulse power
     42  **/
     43 
     44 impulse()
     45 {
     46 	int			course;
     47 	register int		power;
     48 	double			dist, time;
     49 	register int		percent;
     50 	extern double		move();
     51 
     52 	if (Ship.cond == DOCKED)
     53 		return (printf("Scotty: Sorry captain, but we are still docked.\n"));
     54 	if (damaged(IMPULSE))
     55 		return (out(IMPULSE));
     56 	if (getcodi(&course, &dist))
     57 		return;
     58 	power = 20 + 100 * dist;
     59 	percent = 100 * power / Ship.energy + 0.5;
     60 	if (percent >= 85)
     61 	{
     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 	time = dist / 0.095;
     69 	percent = 100 * time / Now.time + 0.5;
     70 	if (percent >= 85)
     71 	{
     72 		printf("Spock: That would take %d%% of our remaining time.\n",
     73 			percent);
     74 		if (!getynpar("Are you sure that is wise"))
     75 			return;
     76 		printf("(He's finally gone mad)\n");
     77 	}
     78 	Move.time = move(0, course, time, 0.095);
     79 	Ship.energy -= 20 + 100 * Move.time * 0.095;
     80 }
     81