xref: /openbsd-current/games/trek/impulse.c

/*	$OpenBSD: impulse.c,v 1.7 2016/01/07 14:37:51 mestre Exp $	*/
/*	$NetBSD: impulse.c,v 1.3 1995/04/22 10:59:03 cgd Exp $	*/

/*
 * Copyright (c) 1980, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <stdio.h>

#include "getpar.h"
#include "trek.h"

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

void
impulse(int v)
{
	int	course, power, percent;
	double	dist, time;

	if (Ship.cond == DOCKED)
	{
		printf("Scotty: Sorry captain, but we are still docked.\n");
		return;
	}
	if (damaged(IMPULSE))
	{
		out(IMPULSE);
		return;
	}
	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;
}