nethack-gwaa-kiwi/nethack
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Save and restore hero tracks

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The tracks left by hero were cleared when player saved and
restored the game, or changed levels.  Now the tracks are
saved in the dungeon level, so changing levels keeps the tracks
left by hero in that level.

Also increased the length of tracks from 50 to 100, and
simplify the tracking function.

Thing not done: fade out old tracks when returning to a level.

Breaks saves and bones.
This commit is contained in:
Pasi Kallinen
2023-12-04 17:44:51 +02:00
parent 2713853f28
commit d8421aa219
9 changed files with 51 additions and 17 deletions
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55
src/track.c
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@@ -6,7 +6,7 @@
#include "hack.h"
#define UTSZ 50
#define UTSZ 100
static NEARDATA int utcnt, utpnt;
static NEARDATA coord utrack[UTSZ];
@@ -15,6 +15,7 @@ void
initrack(void)
{
utcnt = utpnt = 0;
(void) memset((genericptr_t) &utrack, 0, sizeof(utrack));
}
/* add to track */
@@ -30,6 +31,8 @@ settrack(void)
utpnt++;
}
/* get a track coord on or next to x,y and last tracked by hero,
returns null if no such track */
coord *
gettrack(coordxy x, coordxy y)
{
@@ -43,20 +46,48 @@ gettrack(coordxy x, coordxy y)
tc--;
ndist = distmin(x, y, tc->x, tc->y);
/* if far away, skip track entries til we're closer */
if (ndist > 2) {
ndist -= 2; /* be careful due to extra decrement at top of loop */
cnt -= ndist;
if (cnt <= 0)
return (coord *) 0; /* too far away, no matches possible */
if (tc < &utrack[ndist])
tc += (UTSZ - ndist);
else
tc -= ndist;
} else if (ndist <= 1)
if (ndist <= 1)
return (ndist ? tc : 0);
}
return (coord *) 0;
}
/* save the hero tracking info */
void
save_track(NHFILE *nhfp)
{
if (perform_bwrite(nhfp)) {
if (nhfp->structlevel) {
int i;
bwrite(nhfp->fd, (genericptr_t) &utcnt, sizeof utcnt);
bwrite(nhfp->fd, (genericptr_t) &utpnt, sizeof utpnt);
for (i = 0; i < utcnt; i++) {
bwrite(nhfp->fd, (genericptr_t) &utrack[i].x, sizeof utrack[i].x);
bwrite(nhfp->fd, (genericptr_t) &utrack[i].y, sizeof utrack[i].y);
}
}
}
if (release_data(nhfp))
initrack();
}
/* restore the hero tracking info */
void
rest_track(NHFILE *nhfp)
{
if (nhfp->structlevel) {
int i;
mread(nhfp->fd, (genericptr_t) &utcnt, sizeof utcnt);
mread(nhfp->fd, (genericptr_t) &utpnt, sizeof utpnt);
if (utcnt > UTSZ || utpnt > UTSZ)
panic("rest_track: impossible pt counts");
for (i = 0; i < utcnt; i++) {
mread(nhfp->fd, (genericptr_t) &utrack[i].x, sizeof utrack[i].x);
mread(nhfp->fd, (genericptr_t) &utrack[i].y, sizeof utrack[i].y);
}
}
}
/*track.c*/