[unix-history] / usr / src / games / trek / computer.c

#ifndef lint
static char sccsid[] = "@(#)computer.c	4.2	(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 (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
469be121	1	#ifndef lint
06d69904	2	static char sccsid[] = "@(#)computer.c 4.2 (Berkeley) %G%";
469be121 KM	3	#endif not lint
	4
	5	# include "trek.h"
	6	# include "getpar.h"
06d69904	7	# include <stdio.h>
469be121 KM	8	/*
	9	** On-Board Computer
	10	**
	11	** A computer request is fetched from the captain. The requests
	12	** are:
	13	**
	14	** chart -- print a star chart of the known galaxy. This includes
	15	** every quadrant that has ever had a long range or
	16	** a short range scan done of it, plus the location of
	17	** all starbases. This is of course updated by any sub-
	18	** space radio broadcasts (unless the radio is out).
	19	** The format is the same as that of a long range scan
	20	** except that ".1." indicates that a starbase exists
	21	** but we know nothing else.
	22	**
	23	** trajectory -- gives the course and distance to every know
	24	** Klingon in the quadrant. Obviously this fails if the
	25	** short range scanners are out.
	26	**
	27	** course -- gives a course computation from whereever you are
	28	** to any specified location. If the course begins
	29	** with a slash, the current quadrant is taken.
	30	** Otherwise the input is quadrant and sector coordi-
	31	** nates of the target sector.
	32	**
	33	** move -- identical to course, except that the move is performed.
	34	**
	35	** score -- prints out the current score.
	36	**
	37	** pheff -- "PHaser EFFectiveness" at a given distance. Tells
	38	** you how much stuff you need to make it work.
	39	**
	40	** warpcost -- Gives you the cost in time and units to move for
	41	** a given distance under a given warp speed.
	42	**
	43	** impcost -- Same for the impulse engines.
	44	**
	45	** distresslist -- Gives a list of the currently known starsystems
	46	** or starbases which are distressed, together with their
	47	** quadrant coordinates.
	48	**
	49	** If a command is terminated with a semicolon, you remain in
	50	** the computer; otherwise, you escape immediately to the main
	51	** command processor.
	52	*/
	53
06d69904	54	struct cvntab Cputab[] =
469be121	55	{
06d69904 KL	56	"ch", "art", (int (*)())1, 0,
	57	"t", "rajectory", (int (*)())2, 0,
	58	"c", "ourse", (int (*)())3, 0,
	59	"m", "ove", (int (*)())3, 1,
	60	"s", "core", (int (*)())4, 0,
	61	"p", "heff", (int (*)())5, 0,
	62	"w", "arpcost", (int (*)())6, 0,
	63	"i", "mpcost", (int (*)())7, 0,
	64	"d", "istresslist", (int (*)())8, 0,
469be121 KM	65	0
	66	};
	67
	68	computer()
	69	{
	70	int ix, iy;
	71	register int i, j;
	72	int numout;
	73	int tqx, tqy;
	74	struct cvntab *r;
	75	int cost;
	76	int course;
06d69904 KL	77	double dist, time;
06d69904 KL	78	double warpfact;
469be121 KM	79	struct quad *q;
	80	register struct event *e;
	81
	82	if (check_out(COMPUTER))
	83	return;
	84	while (1)
	85	{
	86	r = getcodpar("\nRequest", Cputab);
	87	switch (r->value)
	88	{
	89
	90	case 1: /* star chart */
	91	printf("Computer record of galaxy for all long range sensor scans\n\n");
	92	printf(" ");
	93	/* print top header */
	94	for (i = 0; i < NQUADS; i++)
	95	printf("-%d- ", i);
	96	printf("\n");
	97	for (i = 0; i < NQUADS; i++)
	98	{
	99	printf("%d ", i);
	100	for (j = 0; j < NQUADS; j++)
	101	{
	102	if (i == Ship.quadx && j == Ship.quady)
	103	{
	104	printf("$$$ ");
	105	continue;
	106	}
	107	q = &Quad[i][j];
	108	/* 1000 or 1001 is special case */
	109	if (q->scanned >= 1000)
	110	if (q->scanned > 1000)
	111	printf(".1. ");
	112	else
	113	printf("/// ");
	114	else
	115	if (q->scanned < 0)
	116	printf("... ");
	117	else
	118	printf("%3d ", q->scanned);
	119	}
	120	printf("%d\n", i);
	121	}
	122	printf(" ");
	123	/* print bottom footer */
	124	for (i = 0; i < NQUADS; i++)
	125	printf("-%d- ", i);
	126	printf("\n");
	127	break;
	128
	129	case 2: /* trajectory */
	130	if (check_out(SRSCAN))
	131	{
	132	break;
	133	}
	134	if (Etc.nkling <= 0)
	135	{
	136	printf("No Klingons in this quadrant\n");
	137	break;
	138	}
	139	/* for each Klingon, give the course & distance */
	140	for (i = 0; i < Etc.nkling; i++)
	141	{
	142	printf("Klingon at %d,%d", Etc.klingon[i].x, Etc.klingon[i].y);
143	course = kalc(Ship.quadx, Ship.quady, Etc.klingon[i].x, Etc.klingon[i].y, &dist);
144	prkalc(course, dist);
145	}
146	break;
147
148	case 3: /* course calculation */
149	if (readdelim('/'))
150	{
151	tqx = Ship.quadx;
152	tqy = Ship.quady;
153	}
154	else
155	{
156	ix = getintpar("Quadrant");
157	if (ix < 0 \|\| ix >= NSECTS)
158	break;
159	iy = getintpar("q-y");
160	if (iy < 0 \|\| iy >= NSECTS)
161	break;
162	tqx = ix;
163	tqy = iy;
164	}
165	ix = getintpar("Sector");
166	if (ix < 0 \|\| ix >= NSECTS)
167	break;
168	iy = getintpar("s-y");
169	if (iy < 0 \|\| iy >= NSECTS)
170	break;
171	course = kalc(tqx, tqy, ix, iy, &dist);
172	if (r->value2)
173	{
174	warp(-1, course, dist);
175	break;
176	}
177	printf("%d,%d/%d,%d to %d,%d/%d,%d",
178	Ship.quadx, Ship.quady, Ship.sectx, Ship.secty, tqx, tqy, ix, iy);
179	prkalc(course, dist);
180	break;
181
182	case 4: /* score */
183	score();
184	break;
185
186	case 5: /* phaser effectiveness */
187	dist = getfltpar("range");
188	if (dist < 0.0)
189	break;
06d69904	190	dist *= 10.0;
469be121 KM	191	cost = pow(0.90, dist) * 98.0 + 0.5;
	192	printf("Phasers are %d%% effective at that range\n", cost);
	193	break;
	194
	195	case 6: /* warp cost (time/energy) */
	196	dist = getfltpar("distance");
	197	if (dist < 0.0)
	198	break;
	199	warpfact = getfltpar("warp factor");
	200	if (warpfact <= 0.0)
	201	warpfact = Ship.warp;
	202	cost = (dist + 0.05) * warpfact * warpfact * warpfact;
	203	time = Param.warptime * dist / (warpfact * warpfact);
	204	printf("Warp %.2f distance %.2f cost %.2f stardates %d (%d w/ shlds up) units\n",
	205	warpfact, dist, time, cost, cost + cost);
	206	break;
	207
	208	case 7: /* impulse cost */
	209	dist = getfltpar("distance");
	210	if (dist < 0.0)
	211	break;
	212	cost = 20 + 100 * dist;
	213	time = dist / 0.095;
	214	printf("Distance %.2f cost %.2f stardates %d units\n",
	215	dist, time, cost);
	216	break;
	217
	218	case 8: /* distresslist */
	219	j = 1;
	220	printf("\n");
	221	/* scan the event list */
	222	for (i = 0; i < MAXEVENTS; i++)
	223	{
	224	e = &Event[i];
	225	/* ignore hidden entries */
	226	if (e->evcode & E_HIDDEN)
	227	continue;
	228	switch (e->evcode & E_EVENT)
	229	{
	230
	231	case E_KDESB:
	232	printf("Klingon is attacking starbase in quadrant %d,%d\n",
	233	e->x, e->y);
	234	j = 0;
	235	break;
	236
	237	case E_ENSLV:
	238	case E_REPRO:
	239	printf("Starsystem %s in quadrant %d,%d is distressed\n",
	240	systemname(e), e->x, e->y);
	241	j = 0;
	242	break;
	243	}
	244	}
	245	if (j)
	246	printf("No known distress calls are active\n");
	247	break;
	248
	249	}
	250
	251	/* skip to next semicolon or newline. Semicolon
	252	* means get new computer request; newline means
	253	* exit computer mode. */
	254	while ((i = cgetc(0)) != ';')
255	{
256	if (i == '\0')
257	exit(1);
258	if (i == '\n')
259	{
06d69904	260	ungetc(i, stdin);
469be121 KM	261	return;
	262	}
	263	}
	264	}
	265	}
	266
	267
	268	/*
	269	** Course Calculation
	270	**
	271	** Computes and outputs the course and distance from position
	272	** sqx,sqy/ssx,ssy to tqx,tqy/tsx,tsy.
	273	*/
	274
	275	kalc(tqx, tqy, tsx, tsy, dist)
	276	int tqx;
	277	int tqy;
	278	int tsx;
	279	int tsy;
06d69904	280	double *dist;
469be121 KM	281	{
469be121 KM	282	double dx, dy;
06d69904	283	double quadsize;
469be121 KM	284	double angle;
	285	register int course;
	286
	287	/* normalize to quadrant distances */
	288	quadsize = NSECTS;
	289	dx = (Ship.quadx + Ship.sectx / quadsize) - (tqx + tsx / quadsize);
	290	dy = (tqy + tsy / quadsize) - (Ship.quady + Ship.secty / quadsize);
	291
	292	/* get the angle */
	293	angle = atan2(dy, dx);
	294	/* make it 0 -> 2 pi */
	295	if (angle < 0.0)
06d69904	296	angle += 6.283185307;
469be121 KM	297	/* convert from radians to degrees */
	298	course = angle * 57.29577951 + 0.5;
	299	dx = dx * dx + dy * dy;
	300	*dist = sqrt(dx);
	301	return (course);
	302	}
	303
	304
	305	prkalc(course, dist)
	306	int course;
06d69904	307	double dist;
469be121 KM	308	{
	309	printf(": course %d dist %.3f\n", course, dist);
	310	}