* Copyright (c) 1980 Regents of the University of California.
* 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.
static char sccsid
[] = "@(#)compkl.c 5.3 (Berkeley) %G%";
** compute klingon distances
** The klingon list has the distances for all klingons recomputed
** and sorted. The parameter is a Boolean flag which is set if
** we have just entered a new quadrant.
** This routine is used every time the Enterprise or the Klingons
int f
; /* set if new quadrant */
for (i
= 0; i
< Etc
.nkling
; i
++)
/* compute distance to the Klingon */
dx
= Ship
.sectx
- Etc
.klingon
[i
].x
;
dy
= Ship
.secty
- Etc
.klingon
[i
].y
;
/* compute average of new and old distances to Klingon */
temp
= Etc
.klingon
[i
].dist
;
Etc
.klingon
[i
].avgdist
= 0.5 * (temp
+ d
);
/* new quadrant: average is current */
Etc
.klingon
[i
].avgdist
= d
;
** bubble sort on ascending distance
if (Etc
.klingon
[i
].dist
> Etc
.klingon
[i
+1].dist
)
bmove(&Etc
.klingon
[i
], &t
, sizeof t
);
bmove(&Etc
.klingon
[i
+1], &Etc
.klingon
[i
], sizeof t
);
bmove(&t
, &Etc
.klingon
[i
+1], sizeof t
);