xref: /csrg-svn/games/trek/visual.c (revision 25996)
1*25996Smckusick /*
2*25996Smckusick  * Copyright (c) 1980 Regents of the University of California.
3*25996Smckusick  * All rights reserved.  The Berkeley software License Agreement
4*25996Smckusick  * specifies the terms and conditions for redistribution.
5*25996Smckusick  */
6*25996Smckusick 
711703Smckusick #ifndef lint
8*25996Smckusick static char sccsid[] = "@(#)visual.c	5.1 (Berkeley) 01/29/86";
911703Smckusick #endif not lint
1011703Smckusick 
1111703Smckusick # include	"trek.h"
1211703Smckusick 
1311703Smckusick /*
1411703Smckusick **  VISUAL SCAN
1511703Smckusick **
1611703Smckusick **	A visual scan is made in a particular direction of three sectors
1711703Smckusick **	in the general direction specified.  This takes time, and
1811703Smckusick **	Klingons can attack you, so it should be done only when sensors
1911703Smckusick **	are out.
2011703Smckusick */
2111703Smckusick 
2211703Smckusick /* This struct[] has the delta x, delta y for particular directions */
2312738Slayer struct xy	Visdelta[11] =
2411703Smckusick {
2511703Smckusick 	-1,	-1,
2611703Smckusick 	-1,	 0,
2711703Smckusick 	-1,	 1,
2811703Smckusick 	 0,	 1,
2911703Smckusick 	 1,	 1,
3011703Smckusick 	 1,	 0,
3111703Smckusick 	 1,	-1,
3211703Smckusick 	 0,	-1,
3311703Smckusick 	-1,	-1,
3411703Smckusick 	-1,	 0,
3511703Smckusick 	-1,	 1
3611703Smckusick };
3711703Smckusick 
3811703Smckusick visual()
3911703Smckusick {
4011703Smckusick 	register int		ix, iy;
4111703Smckusick 	int			co;
4211703Smckusick 	register struct xy	*v;
4311703Smckusick 
4411703Smckusick 	co = getintpar("direction");
4511703Smckusick 	if (co < 0 || co > 360)
4611703Smckusick 		return;
4711703Smckusick 	co = (co + 22) / 45;
4811703Smckusick 	v = &Visdelta[co];
4911703Smckusick 	ix = Ship.sectx + v->x;
5011703Smckusick 	iy = Ship.secty + v->y;
5111703Smckusick 	if (ix < 0 || ix >= NSECTS || iy < 0 || iy >= NSECTS)
5211703Smckusick 		co = '?';
5311703Smckusick 	else
5411703Smckusick 		co = Sect[ix][iy];
5511703Smckusick 	printf("%d,%d %c ", ix, iy, co);
5611703Smckusick 	v++;
5711703Smckusick 	ix = Ship.sectx + v->x;
5811703Smckusick 	iy = Ship.secty + v->y;
5911703Smckusick 	if (ix < 0 || ix >= NSECTS || iy < 0 || iy >= NSECTS)
6011703Smckusick 		co = '?';
6111703Smckusick 	else
6211703Smckusick 		co = Sect[ix][iy];
6311703Smckusick 	printf("%c ", co);
6411703Smckusick 	v++;
6511703Smckusick 	ix = Ship.sectx + v->x;
6611703Smckusick 	iy = Ship.secty + v->y;
6711703Smckusick 	if (ix < 0 || ix >= NSECTS || iy < 0 || iy >= NSECTS)
6811703Smckusick 		co = '?';
6911703Smckusick 	else
7011703Smckusick 		co = Sect[ix][iy];
7111703Smckusick 	printf("%c %d,%d\n", co, ix, iy);
7211703Smckusick 	Move.time = 0.05;
7311703Smckusick 	Move.free = 0;
7411703Smckusick }
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