[unix-history] / usr / src / games / trek / computer.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 the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not 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 MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)computer.c	4.6 (Berkeley) %G%";
#endif /* not lint */

# include	"trek.h"
# include	"getpar.h"
# include	<stdio.h>
/*
**  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",			(int (*)())1,		0,
	"t",			"rajectory",		(int (*)())2,		0,
	"c",			"ourse",		(int (*)())3,		0,
	"m",			"ove",			(int (*)())3,		1,
	"s",			"core",			(int (*)())4,		0,
	"p",			"heff",			(int (*)())5,		0,
	"w",			"arpcost",		(int (*)())6,		0,
	"i",			"mpcost",		(int (*)())7,		0,
	"d",			"istresslist",		(int (*)())8,		0,
	0
};

computer()
{
	int			ix, iy;
	register int		i, j;
	int			numout;
	int			tqx, tqy;
	struct cvntab		*r;
	int			cost;
	int			course;
	double			dist, time;
	double			warpfact;
	struct quad		*q;
	register struct event	*e;

	if (check_out(COMPUTER))
		return;
	while (1)
	{
		r = getcodpar("\nRequest", Cputab);
		switch ((int)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;
			time = Param.warptime * dist / (warpfact * warpfact);
			printf("Warp %.2f distance %.2f cost %.2f stardates %d (%d w/ shlds up) units\n",
				warpfact, dist, time, cost, cost + cost);
			break;

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

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


prkalc(course, dist)
int	course;
double	dist;
{
	printf(": course %d  dist %.3f\n", course, dist);
}
Commit	Line	Data
9758240b KM	1	/*
9758240b KM	2	* Copyright (c) 1980 Regents of the University of California.
e9fb6bea KB	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms are permitted
d99e6414 KB	6	* provided that the above copyright notice and this paragraph are
	7	* duplicated in all such forms and that any documentation,
	8	* advertising materials, and other materials related to such
	9	* distribution and use acknowledge that the software was developed
	10	* by the University of California, Berkeley. The name of the
	11	* University may not be used to endorse or promote products derived
	12	* from this software without specific prior written permission.
	13	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
	14	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
	15	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
9758240b KM	16	*/
9758240b KM	17
469be121	18	#ifndef lint
d99e6414	19	static char sccsid[] = "@(#)computer.c 4.6 (Berkeley) %G%";
e9fb6bea	20	#endif /* not lint */
469be121 KM	21
	22	# include "trek.h"
	23	# include "getpar.h"
06d69904	24	# include <stdio.h>
469be121 KM	25	/*
	26	** On-Board Computer
	27	**
	28	** A computer request is fetched from the captain. The requests
	29	** are:
	30	**
	31	** chart -- print a star chart of the known galaxy. This includes
	32	** every quadrant that has ever had a long range or
	33	** a short range scan done of it, plus the location of
	34	** all starbases. This is of course updated by any sub-
	35	** space radio broadcasts (unless the radio is out).
	36	** The format is the same as that of a long range scan
	37	** except that ".1." indicates that a starbase exists
	38	** but we know nothing else.
	39	**
	40	** trajectory -- gives the course and distance to every know
	41	** Klingon in the quadrant. Obviously this fails if the
	42	** short range scanners are out.
	43	**
	44	** course -- gives a course computation from whereever you are
	45	** to any specified location. If the course begins
	46	** with a slash, the current quadrant is taken.
	47	** Otherwise the input is quadrant and sector coordi-
	48	** nates of the target sector.
	49	**
	50	** move -- identical to course, except that the move is performed.
	51	**
	52	** score -- prints out the current score.
	53	**
	54	** pheff -- "PHaser EFFectiveness" at a given distance. Tells
	55	** you how much stuff you need to make it work.
	56	**
	57	** warpcost -- Gives you the cost in time and units to move for
	58	** a given distance under a given warp speed.
	59	**
	60	** impcost -- Same for the impulse engines.
	61	**
	62	** distresslist -- Gives a list of the currently known starsystems
	63	** or starbases which are distressed, together with their
	64	** quadrant coordinates.
	65	**
	66	** If a command is terminated with a semicolon, you remain in
	67	** the computer; otherwise, you escape immediately to the main
	68	** command processor.
	69	*/
	70
06d69904	71	struct cvntab Cputab[] =
469be121	72	{
06d69904 KL	73	"ch", "art", (int (*)())1, 0,
	74	"t", "rajectory", (int (*)())2, 0,
	75	"c", "ourse", (int (*)())3, 0,
	76	"m", "ove", (int (*)())3, 1,
	77	"s", "core", (int (*)())4, 0,
	78	"p", "heff", (int (*)())5, 0,
	79	"w", "arpcost", (int (*)())6, 0,
	80	"i", "mpcost", (int (*)())7, 0,
	81	"d", "istresslist", (int (*)())8, 0,
469be121 KM	82	0
	83	};
	84
	85	computer()
	86	{
	87	int ix, iy;
	88	register int i, j;
	89	int numout;
	90	int tqx, tqy;
	91	struct cvntab *r;
	92	int cost;
	93	int course;
06d69904 KL	94	double dist, time;
06d69904 KL	95	double warpfact;
469be121 KM	96	struct quad *q;
	97	register struct event *e;
	98
	99	if (check_out(COMPUTER))
	100	return;
	101	while (1)
	102	{
	103	r = getcodpar("\nRequest", Cputab);
d09e956e	104	switch ((int)r->value)
469be121 KM	105	{
	106
	107	case 1: /* star chart */
	108	printf("Computer record of galaxy for all long range sensor scans\n\n");
	109	printf(" ");
	110	/* print top header */
	111	for (i = 0; i < NQUADS; i++)
	112	printf("-%d- ", i);
	113	printf("\n");
	114	for (i = 0; i < NQUADS; i++)
	115	{
	116	printf("%d ", i);
	117	for (j = 0; j < NQUADS; j++)
	118	{
	119	if (i == Ship.quadx && j == Ship.quady)
	120	{
	121	printf("$$$ ");
	122	continue;
	123	}
	124	q = &Quad[i][j];
	125	/* 1000 or 1001 is special case */
	126	if (q->scanned >= 1000)
	127	if (q->scanned > 1000)
	128	printf(".1. ");
	129	else
	130	printf("/// ");
	131	else
	132	if (q->scanned < 0)
	133	printf("... ");
	134	else
	135	printf("%3d ", q->scanned);
	136	}
	137	printf("%d\n", i);
	138	}
	139	printf(" ");
	140	/* print bottom footer */
	141	for (i = 0; i < NQUADS; i++)
	142	printf("-%d- ", i);
	143	printf("\n");
	144	break;
	145
	146	case 2: /* trajectory */
	147	if (check_out(SRSCAN))
	148	{
	149	break;
	150	}
	151	if (Etc.nkling <= 0)
	152	{
	153	printf("No Klingons in this quadrant\n");
	154	break;
	155	}
	156	/* for each Klingon, give the course & distance */
	157	for (i = 0; i < Etc.nkling; i++)
	158	{
	159	printf("Klingon at %d,%d", Etc.klingon[i].x, Etc.klingon[i].y);
	160	course = kalc(Ship.quadx, Ship.quady, Etc.klingon[i].x, Etc.klingon[i].y, &dist);
	161	prkalc(course, dist);
	162	}
	163	break;
	164
	165	case 3: /* course calculation */
	166	if (readdelim('/'))
	167	{
	168	tqx = Ship.quadx;
169	tqy = Ship.quady;
170	}
171	else
172	{
173	ix = getintpar("Quadrant");
174	if (ix < 0 \|\| ix >= NSECTS)
175	break;
176	iy = getintpar("q-y");
177	if (iy < 0 \|\| iy >= NSECTS)
178	break;
179	tqx = ix;
180	tqy = iy;
181	}
182	ix = getintpar("Sector");
183	if (ix < 0 \|\| ix >= NSECTS)
184	break;
185	iy = getintpar("s-y");
186	if (iy < 0 \|\| iy >= NSECTS)
187	break;
188	course = kalc(tqx, tqy, ix, iy, &dist);
189	if (r->value2)
190	{
191	warp(-1, course, dist);
192	break;
193	}
194	printf("%d,%d/%d,%d to %d,%d/%d,%d",
195	Ship.quadx, Ship.quady, Ship.sectx, Ship.secty, tqx, tqy, ix, iy);
196	prkalc(course, dist);
197	break;
198
199	case 4: /* score */
200	score();
201	break;
202
203	case 5: /* phaser effectiveness */
204	dist = getfltpar("range");
205	if (dist < 0.0)
206	break;
06d69904	207	dist *= 10.0;
469be121 KM	208	cost = pow(0.90, dist) * 98.0 + 0.5;
	209	printf("Phasers are %d%% effective at that range\n", cost);
	210	break;
	211
	212	case 6: /* warp cost (time/energy) */
	213	dist = getfltpar("distance");
	214	if (dist < 0.0)
	215	break;
	216	warpfact = getfltpar("warp factor");
	217	if (warpfact <= 0.0)
	218	warpfact = Ship.warp;
	219	cost = (dist + 0.05) * warpfact * warpfact * warpfact;
	220	time = Param.warptime * dist / (warpfact * warpfact);
	221	printf("Warp %.2f distance %.2f cost %.2f stardates %d (%d w/ shlds up) units\n",
	222	warpfact, dist, time, cost, cost + cost);
	223	break;
	224
	225	case 7: /* impulse cost */
	226	dist = getfltpar("distance");
	227	if (dist < 0.0)
	228	break;
	229	cost = 20 + 100 * dist;
	230	time = dist / 0.095;
	231	printf("Distance %.2f cost %.2f stardates %d units\n",
	232	dist, time, cost);
	233	break;
	234
	235	case 8: /* distresslist */
	236	j = 1;
	237	printf("\n");
	238	/* scan the event list */
	239	for (i = 0; i < MAXEVENTS; i++)
	240	{
	241	e = &Event[i];
	242	/* ignore hidden entries */
	243	if (e->evcode & E_HIDDEN)
	244	continue;
	245	switch (e->evcode & E_EVENT)
	246	{
	247
	248	case E_KDESB:
	249	printf("Klingon is attacking starbase in quadrant %d,%d\n",
	250	e->x, e->y);
	251	j = 0;
	252	break;
	253
	254	case E_ENSLV:
	255	case E_REPRO:
	256	printf("Starsystem %s in quadrant %d,%d is distressed\n",
	257	systemname(e), e->x, e->y);
	258	j = 0;
	259	break;
	260	}
	261	}
	262	if (j)
	263	printf("No known distress calls are active\n");
	264	break;
	265
	266	}
	267
	268	/* skip to next semicolon or newline. Semicolon
	269	* means get new computer request; newline means
	270	* exit computer mode. */
	271	while ((i = cgetc(0)) != ';')
272	{
273	if (i == '\0')
274	exit(1);
275	if (i == '\n')
276	{
06d69904	277	ungetc(i, stdin);
469be121 KM	278	return;
	279	}
	280	}
	281	}
	282	}
	283
	284
	285	/*
	286	** Course Calculation
	287	**
	288	** Computes and outputs the course and distance from position
	289	** sqx,sqy/ssx,ssy to tqx,tqy/tsx,tsy.
	290	*/
	291
	292	kalc(tqx, tqy, tsx, tsy, dist)
	293	int tqx;
	294	int tqy;
	295	int tsx;
	296	int tsy;
06d69904	297	double *dist;
469be121 KM	298	{
469be121 KM	299	double dx, dy;
06d69904	300	double quadsize;
469be121 KM	301	double angle;
	302	register int course;
	303
	304	/* normalize to quadrant distances */
	305	quadsize = NSECTS;
	306	dx = (Ship.quadx + Ship.sectx / quadsize) - (tqx + tsx / quadsize);
	307	dy = (tqy + tsy / quadsize) - (Ship.quady + Ship.secty / quadsize);
	308
	309	/* get the angle */
	310	angle = atan2(dy, dx);
	311	/* make it 0 -> 2 pi */
	312	if (angle < 0.0)
06d69904	313	angle += 6.283185307;
469be121 KM	314	/* convert from radians to degrees */
	315	course = angle * 57.29577951 + 0.5;
	316	dx = dx * dx + dy * dy;
	317	*dist = sqrt(dx);
	318	return (course);
	319	}
	320
	321
	322	prkalc(course, dist)
	323	int course;
06d69904	324	double dist;
469be121 KM	325	{
	326	printf(": course %d dist %.3f\n", course, dist);
	327	}