File:  [DragonFly] / src / games / trek / computer.c
Revision 1.3: download - view: text, annotated - select for diffs
Thu Sep 7 21:19:44 2006 UTC (7 years, 10 months ago) by pavalos
Branches: MAIN
CVS tags: HEAD, DragonFly_RELEASE_2_0_Slip, DragonFly_RELEASE_2_0, DragonFly_RELEASE_1_8_Slip, DragonFly_RELEASE_1_8, DragonFly_RELEASE_1_12_Slip, DragonFly_RELEASE_1_12, DragonFly_RELEASE_1_10_Slip, DragonFly_RELEASE_1_10, DragonFly_Preview
WARNS6 cleanup (1803 warnings).

ANSI function declarations.

Staticize functions.

Rename local variables that shadow globals.

Use string functions from libc instead of creating our own.

Remove void casts for unchecked function returns.

Spell parameter correctly.

Don't try to return a value from void functions.

Remove compat library requirement (gtty -> ioctl).

Add new function "dowarp" that calls warp() from play.c.  (Taken from
NetBSD).

Change chars that are used for numeric values to shorts so they can be
properly used as array indexes.

/*
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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.
 *
 * @(#)computer.c	8.1 (Berkeley) 5/31/93
 * $FreeBSD: src/games/trek/computer.c,v 1.5 1999/11/30 03:49:45 billf Exp $
 * $DragonFly: src/games/trek/computer.c,v 1.3 2006/09/07 21:19:44 pavalos Exp $
 */

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

static int	kalc(int, int, int, int, double *);
static void	prkalc(int, double);

/*
**  On-Board Computer
**
**	A computer request is fetched from the captain.  The requests
**	are:
**
**	chart -- print a star chart of the known galaxy.  This includes
**		every quadrant that has ever had a long range or
**		a short range scan done of it, plus the location of
**		all starbases.  This is of course updated by any sub-
**		space radio broadcasts (unless the radio is out).
**		The format is the same as that of a long range scan
**		except that ".1." indicates that a starbase exists
**		but we know nothing else.
**
**	trajectory -- gives the course and distance to every know
**		Klingon in the quadrant.  Obviously this fails if the
**		short range scanners are out.
**
**	course -- gives a course computation from whereever you are
**		to any specified location.  If the course begins
**		with a slash, the current quadrant is taken.
**		Otherwise the input is quadrant and sector coordi-
**		nates of the target sector.
**
**	move -- identical to course, except that the move is performed.
**
**	score -- prints out the current score.
**
**	pheff -- "PHaser EFFectiveness" at a given distance.  Tells
**		you how much stuff you need to make it work.
**
**	warpcost -- Gives you the cost in time and units to move for
**		a given distance under a given warp speed.
**
**	impcost -- Same for the impulse engines.
**
**	distresslist -- Gives a list of the currently known starsystems
**		or starbases which are distressed, together with their
**		quadrant coordinates.
**
**	If a command is terminated with a semicolon, you remain in
**	the computer; otherwise, you escape immediately to the main
**	command processor.
*/

struct cvntab	Cputab[] =
{
	{ "ch",	"art",			(void (*)(int))1,	0 },
	{ "t",	"rajectory",		(void (*)(int))2,	0 },
	{ "c",	"ourse",		(void (*)(int))3,	0 },
	{ "m",	"ove",			(void (*)(int))3,	1 },
	{ "s",	"core",			(void (*)(int))4,	0 },
	{ "p",	"heff",			(void (*)(int))5,	0 },
	{ "w",	"arpcost",		(void (*)(int))6,	0 },
	{ "i",	"mpcost",		(void (*)(int))7,	0 },
	{ "d",	"istresslist",		(void (*)(int))8,	0 },
	{ NULL,	NULL,			NULL,			0 }
};

void
computer(__unused int unused)
{
	int			ix, iy;
	int		i, j;
	int			tqx, tqy;
	struct cvntab		*r;
	int			cost;
	int			course;
	double			dist, p_time;
	double			warpfact;
	struct quad		*q;
	struct event	*e;

	if (check_out(COMPUTER))
		return;
	while (1)
	{
		r = getcodpar("\nRequest", Cputab);
		switch ((long)r->value)
		{

		  case 1:			/* star chart */
			printf("Computer record of galaxy for all long range sensor scans\n\n");
			printf("  ");
			/* print top header */
			for (i = 0; i < NQUADS; i++)
				printf("-%d- ", i);
			printf("\n");
			for (i = 0; i < NQUADS; i++)
			{
				printf("%d ", i);
				for (j = 0; j < NQUADS; j++)
				{
					if (i == Ship.quadx && j == Ship.quady)
					{
						printf("$$$ ");
						continue;
					}
					q = &Quad[i][j];
					/* 1000 or 1001 is special case */
					if (q->scanned >= 1000)
						if (q->scanned > 1000)
							printf(".1. ");
						else
							printf("/// ");
					else
						if (q->scanned < 0)
							printf("... ");
						else
							printf("%3d ", q->scanned);
				}
				printf("%d\n", i);
			}
			printf("  ");
			/* print bottom footer */
			for (i = 0; i < NQUADS; i++)
				printf("-%d- ", i);
			printf("\n");
			break;

		  case 2:			/* trajectory */
			if (check_out(SRSCAN))
			{
				break;
			}
			if (Etc.nkling <= 0)
			{
				printf("No Klingons in this quadrant\n");
				break;
			}
			/* for each Klingon, give the course & distance */
			for (i = 0; i < Etc.nkling; i++)
			{
				printf("Klingon at %d,%d", Etc.klingon[i].x, Etc.klingon[i].y);
				course = kalc(Ship.quadx, Ship.quady, Etc.klingon[i].x, Etc.klingon[i].y, &dist);
				prkalc(course, dist);
			}
			break;

		  case 3:			/* course calculation */
			if (readdelim('/'))
			{
				tqx = Ship.quadx;
				tqy = Ship.quady;
			}
			else
			{
				ix = getintpar("Quadrant");
				if (ix < 0 || ix >= NSECTS)
					break;
				iy = getintpar("q-y");
				if (iy < 0 || iy >= NSECTS)
					break;
				tqx = ix;
				tqy = iy;
			}
			ix = getintpar("Sector");
			if (ix < 0 || ix >= NSECTS)
				break;
			iy = getintpar("s-y");
			if (iy < 0 || iy >= NSECTS)
				break;
			course = kalc(tqx, tqy, ix, iy, &dist);
			if (r->value2)
			{
				warp(-1, course, dist);
				break;
			}
			printf("%d,%d/%d,%d to %d,%d/%d,%d",
				Ship.quadx, Ship.quady, Ship.sectx, Ship.secty, tqx, tqy, ix, iy);
			prkalc(course, dist);
			break;

		  case 4:			/* score */
			score();
			break;

		  case 5:			/* phaser effectiveness */
			dist = getfltpar("range");
			if (dist < 0.0)
				break;
			dist *= 10.0;
			cost = pow(0.90, dist) * 98.0 + 0.5;
			printf("Phasers are %d%% effective at that range\n", cost);
			break;

		  case 6:			/* warp cost (time/energy) */
			dist = getfltpar("distance");
			if (dist < 0.0)
				break;
			warpfact = getfltpar("warp factor");
			if (warpfact <= 0.0)
				warpfact = Ship.warp;
			cost = (dist + 0.05) * warpfact * warpfact * warpfact;
			p_time = Param.warptime * dist / (warpfact * warpfact);
			printf("Warp %.2f distance %.2f cost %.2f stardates %d (%d w/ shlds up) units\n",
				warpfact, dist, p_time, cost, cost + cost);
			break;

		  case 7:			/* impulse cost */
			dist = getfltpar("distance");
			if (dist < 0.0)
				break;
			cost = 20 + 100 * dist;
			p_time = dist / 0.095;
			printf("Distance %.2f cost %.2f stardates %d units\n",
				dist, p_time, cost);
			break;

		  case 8:			/* distresslist */
			j = 1;
			printf("\n");
			/* scan the event list */
			for (i = 0; i < MAXEVENTS; i++)
			{
				e = &Event[i];
				/* ignore hidden entries */
				if (e->evcode & E_HIDDEN)
					continue;
				switch (e->evcode & E_EVENT)
				{

				  case E_KDESB:
					printf("Klingon is attacking starbase in quadrant %d,%d\n",
						e->x, e->y);
					j = 0;
					break;

				  case E_ENSLV:
				  case E_REPRO:
					printf("Starsystem %s in quadrant %d,%d is distressed\n",
						Systemname[e->systemname], e->x, e->y);
					j = 0;
					break;
				}
			}
			if (j)
				printf("No known distress calls are active\n");
			break;

		}

		/* skip to next semicolon or newline.  Semicolon
		 * means get new computer request; newline means
		 * exit computer mode. */
		while ((i = cgetc(0)) != ';')
		{
			if (i == '\0')
				exit(1);
			if (i == '\n')
			{
				ungetc(i, stdin);
				return;
			}
		}
	}
}


/*
**  Course Calculation
**
**	Computes and outputs the course and distance from position
**	sqx,sqy/ssx,ssy to tqx,tqy/tsx,tsy.
*/

static int
kalc(int tqx, int tqy, int tsx, int tsy, double *dist)
{
	double			dx, dy;
	double			quadsize;
	double			angle;
	int		course;

	/* normalize to quadrant distances */
	quadsize = NSECTS;
	dx = (Ship.quadx + Ship.sectx / quadsize) - (tqx + tsx / quadsize);
	dy = (tqy + tsy / quadsize) - (Ship.quady + Ship.secty / quadsize);

	/* get the angle */
	angle = atan2(dy, dx);
	/* make it 0 -> 2 pi */
	if (angle < 0.0)
		angle += 6.283185307;
	/* convert from radians to degrees */
	course = angle * 57.29577951 + 0.5;
	dx = dx * dx + dy * dy;
	*dist = sqrt(dx);
	return (course);
}

static void
prkalc(int course, double dist)
{
	printf(": course %d  dist %.3f\n", course, dist);
}