19 |
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20 |
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#include "random.h" |
21 |
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|
22 |
+ |
#define MINSAMPLES 5 /* minimum number of pretest samples */ |
23 |
+ |
#define STESTMAX 30 /* maximum seeks per sample */ |
24 |
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25 |
+ |
|
26 |
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double getdisk(); |
27 |
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28 |
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static OBJECT *vobject; /* virtual source objects */ |
104 |
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for (i = 0; i < vsmat->nproj; i++) |
105 |
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if ((*vsmat->vproj)(proj, o, &source[sn], i)) |
106 |
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if ((ns = makevsrc(o, sn, proj)) >= 0) { |
107 |
+ |
source[ns].sa.sv.pn = i; |
108 |
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#ifdef DEBUG |
109 |
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virtverb(ns, stderr); |
110 |
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#endif |
119 |
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register int sn; |
120 |
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MAT4 pm; |
121 |
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{ |
122 |
< |
FVECT nsloc, nsnorm, ocent; |
123 |
< |
double maxrad2; |
122 |
> |
FVECT nsloc, nsnorm, ocent, v; |
123 |
> |
double maxrad2, d; |
124 |
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int nsflags; |
121 |
– |
double d1; |
125 |
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SPOT theirspot, ourspot; |
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register int i; |
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|
135 |
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if (source[sn].sflags & SPROX) |
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return(-1); /* should never get here! */ |
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multv3(nsloc, source[sn].sloc, pm); |
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+ |
normalize(nsloc); |
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VCOPY(ourspot.aim, ocent); |
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ourspot.siz = PI*maxrad2; |
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ourspot.flen = 0.; |
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if (source[sn].sflags & SSPOT) { |
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copystruct(&theirspot, source[sn].sl.s); |
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multp3(theirspot.aim, source[sn].sl.s->aim, pm); |
145 |
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d = ourspot.siz; |
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if (!commonbeam(&ourspot, &theirspot, nsloc)) |
147 |
< |
return(-1); /* no overlap */ |
147 |
> |
return(-1); /* no overlap */ |
148 |
> |
if (ourspot.siz < d-FTINY) { /* it shrunk */ |
149 |
> |
d = beamdisk(v, op, &ourspot, nsloc); |
150 |
> |
if (d <= FTINY) |
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> |
return(-1); |
152 |
> |
if (d < maxrad2) { |
153 |
> |
maxrad2 = d; |
154 |
> |
VCOPY(ocent, v); |
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> |
} |
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> |
} |
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} |
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} else { /* local source */ |
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multp3(nsloc, source[sn].sloc, pm); |
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for (i = 0; i < 3; i++) |
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ourspot.aim[i] = ocent[i] - nsloc[i]; |
162 |
< |
if ((d1 = normalize(ourspot.aim)) == 0.) |
162 |
> |
if ((d = normalize(ourspot.aim)) == 0.) |
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return(-1); /* at source!! */ |
164 |
< |
if (source[sn].sflags & SPROX && d1 > source[sn].sl.prox) |
164 |
> |
if (source[sn].sflags & SPROX && d > source[sn].sl.prox) |
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return(-1); /* too far away */ |
152 |
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ourspot.siz = 2.*PI*(1. - d1/sqrt(d1*d1+maxrad2)); |
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ourspot.flen = 0.; |
167 |
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if (d*d > maxrad2) |
168 |
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ourspot.siz = 2.*PI*(1. - sqrt(1.-maxrad2/(d*d))); |
169 |
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else |
170 |
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nsflags &= ~SSPOT; |
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if (source[sn].sflags & SSPOT) { |
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copystruct(&theirspot, source[sn].sl.s); |
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multv3(theirspot.aim, source[sn].sl.s->aim, pm); |
174 |
< |
if (!commonspot(&ourspot, &theirspot, nsloc)) |
175 |
< |
return(-1); /* no overlap */ |
176 |
< |
ourspot.flen = theirspot.flen; |
174 |
> |
normalize(theirspot.aim); |
175 |
> |
if (nsflags & SSPOT) { |
176 |
> |
ourspot.flen = theirspot.flen; |
177 |
> |
d = ourspot.siz; |
178 |
> |
if (!commonspot(&ourspot, &theirspot, nsloc)) |
179 |
> |
return(-1); /* no overlap */ |
180 |
> |
} else { |
181 |
> |
nsflags |= SSPOT; |
182 |
> |
copystruct(&ourspot, &theirspot); |
183 |
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d = 2.*ourspot.siz; |
184 |
> |
} |
185 |
> |
if (ourspot.siz < d-FTINY) { /* it shrunk */ |
186 |
> |
d = spotdisk(v, op, &ourspot, nsloc); |
187 |
> |
if (d <= FTINY) |
188 |
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return(-1); |
189 |
> |
if (d < maxrad2) { |
190 |
> |
maxrad2 = d; |
191 |
> |
VCOPY(ocent, v); |
192 |
> |
} |
193 |
> |
} |
194 |
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} |
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if (source[sn].sflags & SFLAT) { /* behind source? */ |
196 |
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multv3(nsnorm, source[sn].snorm, pm); |
197 |
< |
if (checkspot(&ourspot, nsnorm) < 0) |
197 |
> |
normalize(nsnorm); |
198 |
> |
if (!checkspot(&ourspot, nsnorm)) |
199 |
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return(-1); |
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} |
201 |
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} |
211 |
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if (nsflags & SFLAT) |
212 |
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VCOPY(source[i].snorm, nsnorm); |
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source[i].ss = source[sn].ss; source[i].ss2 = source[sn].ss2; |
214 |
< |
if ((source[i].sl.s = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
215 |
< |
goto memerr; |
216 |
< |
copystruct(source[i].sl.s, &ourspot); |
214 |
> |
if (nsflags & SSPOT) { |
215 |
> |
if ((source[i].sl.s = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
216 |
> |
goto memerr; |
217 |
> |
copystruct(source[i].sl.s, &ourspot); |
218 |
> |
} |
219 |
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if (nsflags & SPROX) |
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source[i].sl.prox = source[sn].sl.prox; |
221 |
< |
source[i].sa.svnext = sn; |
221 |
> |
source[i].sa.sv.sn = sn; |
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source[i].so = op; |
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return(i); |
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memerr: |
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double rad2, roffs, offs, d, rd, rdoto; |
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FVECT rnrm, nrm; |
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/* first, use object getdisk function */ |
238 |
< |
rad2 = (*sfun[op->otype].of->getdisk)(oc, op); |
238 |
> |
rad2 = getmaxdisk(oc, op); |
239 |
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if (!(source[sn].sflags & SVIRTUAL)) |
240 |
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return(rad2); /* all done for normal source */ |
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/* check for correct side of relay surface */ |
242 |
< |
roffs = (*sfun[source[sn].so->otype].of->getpleq)(rnrm, source[sn].so); |
242 |
> |
roffs = getplaneq(rnrm, source[sn].so); |
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rd = DOT(rnrm, source[sn].sloc); /* source projection */ |
244 |
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if (!(source[sn].sflags & SDISTANT)) |
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rd -= roffs; |
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if ((d > 0.) ^ (rd > 0.)) |
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return(rad2); /* OK if opposite sides */ |
249 |
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if (d*d >= rad2) |
250 |
< |
return(.0); /* no relay is possible */ |
250 |
> |
return(0.); /* no relay is possible */ |
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/* we need a closer look */ |
252 |
< |
offs = (*sfun[op->otype].of->getpleq)(nrm, op); |
252 |
> |
offs = getplaneq(nrm, op); |
253 |
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rdoto = DOT(rnrm, nrm); |
254 |
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if (d*d >= rad2*(1.-rdoto*rdoto)) |
255 |
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return(0.); /* disk entirely on projection side */ |
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FVECT offsdir; |
272 |
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double or, d; |
273 |
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int infront; |
274 |
< |
int ssn; |
275 |
< |
int nok, nhit; |
274 |
> |
int stestlim, ssn; |
275 |
> |
int nhit, nok; |
276 |
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register int i, n; |
277 |
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/* return if pretesting disabled */ |
278 |
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if (vspretest <= 0) |
279 |
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return(f); |
280 |
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/* get surface normal */ |
281 |
< |
(*sfun[o->otype].of->getpleq)(onorm, o); |
281 |
> |
getplaneq(onorm, o); |
282 |
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/* set number of rays to sample */ |
283 |
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if (source[sn].sflags & SDISTANT) { |
284 |
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n = (2./3.*PI*PI)*or2/(thescene.cusize*thescene.cusize)* |
285 |
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vspretest + .5; |
286 |
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infront = DOT(onorm, source[sn].sloc) > 0.; |
287 |
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} else { |
251 |
– |
n = or2/dist2(oc,source[sn].sloc)*vspretest + .5; |
288 |
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for (i = 0; i < 3; i++) |
289 |
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offsdir[i] = source[sn].sloc[i] - oc[i]; |
290 |
+ |
n = or2/DOT(offsdir,offsdir)*vspretest + .5; |
291 |
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infront = DOT(onorm, offsdir) > 0.; |
292 |
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} |
293 |
< |
if (n < 1) n = 1; |
293 |
> |
if (n < MINSAMPLES) n = MINSAMPLES; |
294 |
> |
#ifdef DEBUG |
295 |
> |
fprintf(stderr, "pretesting source %d in object %s with %d rays\n", |
296 |
> |
sn, o->oname, n); |
297 |
> |
#endif |
298 |
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/* sample */ |
299 |
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or = sqrt(or2); |
300 |
< |
ssn = 7*n; |
300 |
> |
stestlim = n*STESTMAX; |
301 |
> |
ssn = 0; |
302 |
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nhit = nok = 0; |
303 |
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while (n-- > 0) { |
304 |
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/* get sample point */ |
305 |
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do { |
306 |
< |
if (--ssn < 0) |
306 |
> |
if (ssn >= stestlim) { |
307 |
> |
#ifdef DEBUG |
308 |
> |
fprintf(stderr, "\ttoo hard to hit\n"); |
309 |
> |
#endif |
310 |
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return(f); /* too small a target! */ |
311 |
+ |
} |
312 |
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for (i = 0; i < 3; i++) |
313 |
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offsdir[i] = or*(1. - |
314 |
< |
2.*urand(931*i+5827+ssn)); |
314 |
> |
2.*urand(urind(931*i+5827,ssn))); |
315 |
> |
ssn++; |
316 |
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for (i = 0; i < 3; i++) |
317 |
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sr.rorg[i] = oc[i] + offsdir[i]; |
318 |
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d = DOT(offsdir,onorm); |
330 |
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} while (!(*ofun[o->otype].funp)(o, &sr)); |
331 |
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/* check against source */ |
332 |
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samplendx++; |
333 |
< |
if (srcray(&sr, NULL, sn) == 0.0) |
333 |
> |
if (srcray(&sr, NULL, sn) == 0.) |
334 |
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continue; |
335 |
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sr.revf = srcvalue; |
336 |
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rayvalue(&sr); |
340 |
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/* check against obstructions */ |
341 |
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srcray(&sr, NULL, sn); |
342 |
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rayvalue(&sr); |
343 |
< |
if (bright(sr.rcol) <= FTINY) |
344 |
< |
continue; |
345 |
< |
nhit++; |
343 |
> |
if (bright(sr.rcol) > FTINY) |
344 |
> |
nhit++; |
345 |
> |
if (nhit > 0 && nhit < nok) { |
346 |
> |
#ifdef DEBUG |
347 |
> |
fprintf(stderr, "\tpartially occluded\n"); |
348 |
> |
#endif |
349 |
> |
return(f); /* need to shadow test */ |
350 |
> |
} |
351 |
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} |
352 |
< |
/* interpret results */ |
353 |
< |
if (nhit == 0) |
352 |
> |
if (nhit == 0) { |
353 |
> |
#ifdef DEBUG |
354 |
> |
fprintf(stderr, "\t0%% hit rate\n"); |
355 |
> |
#endif |
356 |
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return(f | SSKIP); /* 0% hit rate: totally occluded */ |
357 |
< |
if (nhit == nok) |
358 |
< |
return(f & ~SFOLLOW); /* 100% hit rate: no occlusion */ |
359 |
< |
return(f); /* no comment */ |
357 |
> |
} |
358 |
> |
#ifdef DEBUG |
359 |
> |
fprintf(stderr, "\t100%% hit rate\n"); |
360 |
> |
#endif |
361 |
> |
return(f & ~SFOLLOW); /* 100% hit rate: no occlusion */ |
362 |
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} |
363 |
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364 |
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|
376 |
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fprintf(fp, "\tat (%f,%f,%f)\n", |
377 |
|
source[sn].sloc[0], source[sn].sloc[1], source[sn].sloc[2]); |
378 |
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fprintf(fp, "\tlinked to source %d (%s)\n", |
379 |
< |
source[sn].sa.svnext, source[source[sn].sa.svnext].so->oname); |
379 |
> |
source[sn].sa.sv.sn, source[source[sn].sa.sv.sn].so->oname); |
380 |
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if (source[sn].sflags & SFOLLOW) |
381 |
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fprintf(fp, "\talways followed\n"); |
382 |
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else |