4.3BSD-Reno/src/games/trek/impulse.c

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted provided
 * that: (1) source distributions retain this entire copyright notice and
 * comment, and (2) distributions including binaries display the following
 * acknowledgement:  ``This product includes software developed by the
 * University of California, Berkeley and its contributors'' in the
 * documentation or other materials provided with the distribution and in
 * all advertising materials mentioning features or use of this software.
 * Neither the name of the University nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)impulse.c	5.4 (Berkeley) 6/1/90";
#endif /* not lint */

# include	"trek.h"

/**
 **	move under impulse power
 **/

impulse()
{
	int			course;
	register int		power;
	double			dist, time;
	register int		percent;
	extern double		move();

	if (Ship.cond == DOCKED)
		return (printf("Scotty: Sorry captain, but we are still docked.\n"));
	if (damaged(IMPULSE))
		return (out(IMPULSE));
	if (getcodi(&course, &dist))
		return;
	power = 20 + 100 * dist;
	percent = 100 * power / Ship.energy + 0.5;
	if (percent >= 85)
	{
		printf("Scotty: That would consume %d%% of our remaining energy.\n",
			percent);
		if (!getynpar("Are you sure that is wise"))
			return;
		printf("Aye aye, sir\n");
	}
	time = dist / 0.095;
	percent = 100 * time / Now.time + 0.5;
	if (percent >= 85)
	{
		printf("Spock: That would take %d%% of our remaining time.\n",
			percent);
		if (!getynpar("Are you sure that is wise"))
			return;
		printf("(He's finally gone mad)\n");
	}
	Move.time = move(0, course, time, 0.095);
	Ship.energy -= 20 + 100 * Move.time * 0.095;
}