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; |
126 |
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register int i; |
127 |
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|
135 |
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if (source[sn].sflags & SPROX) |
136 |
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return(-1); /* should never get here! */ |
137 |
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multv3(nsloc, source[sn].sloc, pm); |
138 |
+ |
normalize(nsloc); |
139 |
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VCOPY(ourspot.aim, ocent); |
140 |
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ourspot.siz = PI*maxrad2; |
141 |
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ourspot.flen = 0.; |
142 |
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if (source[sn].sflags & SSPOT) { |
139 |
– |
copystruct(&theirspot, source[sn].sl.s); |
143 |
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multp3(theirspot.aim, source[sn].sl.s->aim, pm); |
144 |
+ |
d = sqrt(dist2(ourspot.aim, theirspot.aim)); |
145 |
+ |
d = sqrt(source[sn].sl.s->siz/PI) + d*source[sn].ss; |
146 |
+ |
theirspot.siz = PI*d*d; |
147 |
+ |
ourspot.flen = theirspot.flen = source[sn].sl.s->flen; |
148 |
+ |
d = ourspot.siz; |
149 |
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if (!commonbeam(&ourspot, &theirspot, nsloc)) |
150 |
< |
return(-1); /* no overlap */ |
150 |
> |
return(-1); /* no overlap */ |
151 |
> |
if (ourspot.siz < d-FTINY) { /* it shrunk */ |
152 |
> |
d = beamdisk(v, op, &ourspot, nsloc); |
153 |
> |
if (d <= FTINY) |
154 |
> |
return(-1); |
155 |
> |
if (d < maxrad2) { |
156 |
> |
maxrad2 = d; |
157 |
> |
VCOPY(ocent, v); |
158 |
> |
} |
159 |
> |
} |
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} |
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} else { /* local source */ |
162 |
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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]; |
165 |
< |
if ((d1 = normalize(ourspot.aim)) == 0.) |
165 |
> |
if ((d = normalize(ourspot.aim)) == 0.) |
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return(-1); /* at source!! */ |
167 |
< |
if (source[sn].sflags & SPROX && d1 > source[sn].sl.prox) |
167 |
> |
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)); |
169 |
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ourspot.flen = 0.; |
170 |
+ |
d = (sqrt(maxrad2) + source[sn].ss) / d; |
171 |
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if (d < 1.-FTINY) |
172 |
+ |
ourspot.siz = 2.*PI*(1. - sqrt(1.-d*d)); |
173 |
+ |
else |
174 |
+ |
nsflags &= ~SSPOT; |
175 |
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if (source[sn].sflags & SSPOT) { |
176 |
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copystruct(&theirspot, source[sn].sl.s); |
177 |
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multv3(theirspot.aim, source[sn].sl.s->aim, pm); |
178 |
< |
if (!commonspot(&ourspot, &theirspot, nsloc)) |
179 |
< |
return(-1); /* no overlap */ |
180 |
< |
ourspot.flen = theirspot.flen; |
178 |
> |
normalize(theirspot.aim); |
179 |
> |
if (nsflags & SSPOT) { |
180 |
> |
ourspot.flen = theirspot.flen; |
181 |
> |
d = ourspot.siz; |
182 |
> |
if (!commonspot(&ourspot, &theirspot, nsloc)) |
183 |
> |
return(-1); /* no overlap */ |
184 |
> |
} else { |
185 |
> |
nsflags |= SSPOT; |
186 |
> |
copystruct(&ourspot, &theirspot); |
187 |
> |
d = 2.*ourspot.siz; |
188 |
> |
} |
189 |
> |
if (ourspot.siz < d-FTINY) { /* it shrunk */ |
190 |
> |
d = spotdisk(v, op, &ourspot, nsloc); |
191 |
> |
if (d <= FTINY) |
192 |
> |
return(-1); |
193 |
> |
if (d < maxrad2) { |
194 |
> |
maxrad2 = d; |
195 |
> |
VCOPY(ocent, v); |
196 |
> |
} |
197 |
> |
} |
198 |
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} |
199 |
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if (source[sn].sflags & SFLAT) { /* behind source? */ |
200 |
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multv3(nsnorm, source[sn].snorm, pm); |
201 |
< |
if (checkspot(&ourspot, nsnorm) < 0) |
201 |
> |
normalize(nsnorm); |
202 |
> |
if (nsflags & SSPOT && !checkspot(&ourspot, nsnorm)) |
203 |
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return(-1); |
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} |
205 |
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} |
215 |
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if (nsflags & SFLAT) |
216 |
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VCOPY(source[i].snorm, nsnorm); |
217 |
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source[i].ss = source[sn].ss; source[i].ss2 = source[sn].ss2; |
218 |
< |
if ((source[i].sl.s = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
219 |
< |
goto memerr; |
220 |
< |
copystruct(source[i].sl.s, &ourspot); |
218 |
> |
if (nsflags & SSPOT) { |
219 |
> |
if ((source[i].sl.s = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
220 |
> |
goto memerr; |
221 |
> |
copystruct(source[i].sl.s, &ourspot); |
222 |
> |
} |
223 |
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if (nsflags & SPROX) |
224 |
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source[i].sl.prox = source[sn].sl.prox; |
225 |
< |
source[i].sa.svnext = sn; |
225 |
> |
source[i].sa.sv.sn = sn; |
226 |
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source[i].so = op; |
227 |
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return(i); |
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memerr: |
239 |
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double rad2, roffs, offs, d, rd, rdoto; |
240 |
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FVECT rnrm, nrm; |
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/* first, use object getdisk function */ |
242 |
< |
rad2 = (*sfun[op->otype].of->getdisk)(oc, op); |
242 |
> |
rad2 = getmaxdisk(oc, op); |
243 |
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if (!(source[sn].sflags & SVIRTUAL)) |
244 |
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return(rad2); /* all done for normal source */ |
245 |
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/* check for correct side of relay surface */ |
246 |
< |
roffs = (*sfun[source[sn].so->otype].of->getpleq)(rnrm, source[sn].so); |
246 |
> |
roffs = getplaneq(rnrm, source[sn].so); |
247 |
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rd = DOT(rnrm, source[sn].sloc); /* source projection */ |
248 |
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if (!(source[sn].sflags & SDISTANT)) |
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rd -= roffs; |
251 |
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if ((d > 0.) ^ (rd > 0.)) |
252 |
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return(rad2); /* OK if opposite sides */ |
253 |
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if (d*d >= rad2) |
254 |
< |
return(.0); /* no relay is possible */ |
254 |
> |
return(0.); /* no relay is possible */ |
255 |
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/* we need a closer look */ |
256 |
< |
offs = (*sfun[op->otype].of->getpleq)(nrm, op); |
256 |
> |
offs = getplaneq(nrm, op); |
257 |
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rdoto = DOT(rnrm, nrm); |
258 |
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if (d*d >= rad2*(1.-rdoto*rdoto)) |
259 |
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return(0.); /* disk entirely on projection side */ |
275 |
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FVECT offsdir; |
276 |
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double or, d; |
277 |
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int infront; |
278 |
< |
int ssn; |
279 |
< |
int nok, nhit; |
278 |
> |
int stestlim, ssn; |
279 |
> |
int nhit, nok; |
280 |
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register int i, n; |
281 |
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/* return if pretesting disabled */ |
282 |
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if (vspretest <= 0) |
283 |
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return(f); |
284 |
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/* get surface normal */ |
285 |
< |
(*sfun[o->otype].of->getpleq)(onorm, o); |
285 |
> |
getplaneq(onorm, o); |
286 |
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/* set number of rays to sample */ |
287 |
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if (source[sn].sflags & SDISTANT) { |
288 |
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n = (2./3.*PI*PI)*or2/(thescene.cusize*thescene.cusize)* |
289 |
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vspretest + .5; |
290 |
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infront = DOT(onorm, source[sn].sloc) > 0.; |
291 |
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} else { |
251 |
– |
n = or2/dist2(oc,source[sn].sloc)*vspretest + .5; |
292 |
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for (i = 0; i < 3; i++) |
293 |
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offsdir[i] = source[sn].sloc[i] - oc[i]; |
294 |
+ |
d = DOT(offsdir,offsdir); |
295 |
+ |
if (d <= FTINY) |
296 |
+ |
n = 2.*PI * vspretest + .5; |
297 |
+ |
else |
298 |
+ |
n = 2.*PI * (1.-sqrt(1./(1.+or2/d)))*vspretest + .5; |
299 |
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infront = DOT(onorm, offsdir) > 0.; |
300 |
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} |
301 |
< |
if (n < 1) n = 1; |
301 |
> |
if (n < MINSAMPLES) n = MINSAMPLES; |
302 |
> |
#ifdef DEBUG |
303 |
> |
fprintf(stderr, "pretesting source %d in object %s with %d rays\n", |
304 |
> |
sn, o->oname, n); |
305 |
> |
#endif |
306 |
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/* sample */ |
307 |
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or = sqrt(or2); |
308 |
< |
ssn = 7*n; |
308 |
> |
stestlim = n*STESTMAX; |
309 |
> |
ssn = 0; |
310 |
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nhit = nok = 0; |
311 |
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while (n-- > 0) { |
312 |
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/* get sample point */ |
313 |
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do { |
314 |
< |
if (--ssn < 0) |
314 |
> |
if (ssn >= stestlim) { |
315 |
> |
#ifdef DEBUG |
316 |
> |
fprintf(stderr, "\ttoo hard to hit\n"); |
317 |
> |
#endif |
318 |
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return(f); /* too small a target! */ |
319 |
+ |
} |
320 |
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for (i = 0; i < 3; i++) |
321 |
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offsdir[i] = or*(1. - |
322 |
< |
2.*urand(931*i+5827+ssn)); |
322 |
> |
2.*urand(urind(931*i+5827,ssn))); |
323 |
> |
ssn++; |
324 |
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for (i = 0; i < 3; i++) |
325 |
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sr.rorg[i] = oc[i] + offsdir[i]; |
326 |
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d = DOT(offsdir,onorm); |
338 |
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} while (!(*ofun[o->otype].funp)(o, &sr)); |
339 |
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/* check against source */ |
340 |
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samplendx++; |
341 |
< |
if (srcray(&sr, NULL, sn) == 0.0) |
341 |
> |
if (srcray(&sr, NULL, sn) == 0.) |
342 |
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continue; |
343 |
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sr.revf = srcvalue; |
344 |
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rayvalue(&sr); |
346 |
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continue; |
347 |
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nok++; |
348 |
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/* check against obstructions */ |
349 |
< |
srcray(&sr, NULL, sn); |
349 |
> |
rayclear(&sr); |
350 |
> |
sr.revf = raytrace; |
351 |
|
rayvalue(&sr); |
352 |
< |
if (bright(sr.rcol) <= FTINY) |
353 |
< |
continue; |
354 |
< |
nhit++; |
352 |
> |
if (bright(sr.rcol) > FTINY) |
353 |
> |
nhit++; |
354 |
> |
if (nhit > 0 && nhit < nok) { |
355 |
> |
#ifdef DEBUG |
356 |
> |
fprintf(stderr, "\tpartially occluded\n"); |
357 |
> |
#endif |
358 |
> |
return(f); /* need to shadow test */ |
359 |
> |
} |
360 |
|
} |
361 |
< |
/* interpret results */ |
362 |
< |
if (nhit == 0) |
361 |
> |
if (nhit == 0) { |
362 |
> |
#ifdef DEBUG |
363 |
> |
fprintf(stderr, "\t0%% hit rate\n"); |
364 |
> |
#endif |
365 |
|
return(f | SSKIP); /* 0% hit rate: totally occluded */ |
366 |
< |
if (nhit == nok) |
367 |
< |
return(f & ~SFOLLOW); /* 100% hit rate: no occlusion */ |
368 |
< |
return(f); /* no comment */ |
366 |
> |
} |
367 |
> |
#ifdef DEBUG |
368 |
> |
fprintf(stderr, "\t100%% hit rate\n"); |
369 |
> |
#endif |
370 |
> |
return(f & ~SFOLLOW); /* 100% hit rate: no occlusion */ |
371 |
|
} |
372 |
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|
373 |
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|
385 |
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fprintf(fp, "\tat (%f,%f,%f)\n", |
386 |
|
source[sn].sloc[0], source[sn].sloc[1], source[sn].sloc[2]); |
387 |
|
fprintf(fp, "\tlinked to source %d (%s)\n", |
388 |
< |
source[sn].sa.svnext, source[source[sn].sa.svnext].so->oname); |
388 |
> |
source[sn].sa.sv.sn, source[source[sn].sa.sv.sn].so->oname); |
389 |
|
if (source[sn].sflags & SFOLLOW) |
390 |
|
fprintf(fp, "\talways followed\n"); |
391 |
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else |