d8421aa219
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.
94 lines
2.3 KiB
C
94 lines
2.3 KiB
C
/* NetHack 3.7 track.c $NHDT-Date: 1596498219 2020/08/03 23:43:39 $ $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.12 $ */
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/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
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/*-Copyright (c) Kenneth Lorber, Kensington, Maryland, 2015. */
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/* NetHack may be freely redistributed. See license for details. */
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/* track.c - version 1.0.2 */
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#include "hack.h"
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#define UTSZ 100
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static NEARDATA int utcnt, utpnt;
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static NEARDATA coord utrack[UTSZ];
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void
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initrack(void)
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{
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utcnt = utpnt = 0;
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(void) memset((genericptr_t) &utrack, 0, sizeof(utrack));
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}
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/* add to track */
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void
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settrack(void)
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{
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if (utcnt < UTSZ)
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utcnt++;
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if (utpnt == UTSZ)
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utpnt = 0;
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utrack[utpnt].x = u.ux;
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utrack[utpnt].y = u.uy;
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utpnt++;
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}
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/* get a track coord on or next to x,y and last tracked by hero,
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returns null if no such track */
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coord *
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gettrack(coordxy x, coordxy y)
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{
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register int cnt, ndist;
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register coord *tc;
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cnt = utcnt;
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for (tc = &utrack[utpnt]; cnt--;) {
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if (tc == utrack)
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tc = &utrack[UTSZ - 1];
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else
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tc--;
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ndist = distmin(x, y, tc->x, tc->y);
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if (ndist <= 1)
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return (ndist ? tc : 0);
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}
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return (coord *) 0;
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}
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/* save the hero tracking info */
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void
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save_track(NHFILE *nhfp)
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{
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if (perform_bwrite(nhfp)) {
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if (nhfp->structlevel) {
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int i;
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bwrite(nhfp->fd, (genericptr_t) &utcnt, sizeof utcnt);
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bwrite(nhfp->fd, (genericptr_t) &utpnt, sizeof utpnt);
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for (i = 0; i < utcnt; i++) {
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bwrite(nhfp->fd, (genericptr_t) &utrack[i].x, sizeof utrack[i].x);
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bwrite(nhfp->fd, (genericptr_t) &utrack[i].y, sizeof utrack[i].y);
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}
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}
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}
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if (release_data(nhfp))
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initrack();
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}
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/* restore the hero tracking info */
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void
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rest_track(NHFILE *nhfp)
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{
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if (nhfp->structlevel) {
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int i;
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mread(nhfp->fd, (genericptr_t) &utcnt, sizeof utcnt);
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mread(nhfp->fd, (genericptr_t) &utpnt, sizeof utpnt);
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if (utcnt > UTSZ || utpnt > UTSZ)
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panic("rest_track: impossible pt counts");
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for (i = 0; i < utcnt; i++) {
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mread(nhfp->fd, (genericptr_t) &utrack[i].x, sizeof utrack[i].x);
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mread(nhfp->fd, (genericptr_t) &utrack[i].y, sizeof utrack[i].y);
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}
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}
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}
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/*track.c*/
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