15 |
|
|
16 |
|
#include "random.h" |
17 |
|
|
18 |
+ |
#ifdef SSKIPOPT |
19 |
+ |
/* The following table is used for skipping sources */ |
20 |
+ |
static uby8 *srcskipflags = NULL; /* source inclusion lookup */ |
21 |
+ |
static int ssf_count = 0; /* number of flag entries */ |
22 |
+ |
static int ssf_max = 0; /* current array size */ |
23 |
+ |
static uby8 *ssf_noskip = NULL; /* set of zero flags */ |
24 |
|
|
25 |
< |
static int cyl_partit(), flt_partit(); |
25 |
> |
uby8 *ssf_select = NULL; /* sources we may skip */ |
26 |
|
|
27 |
+ |
/* Find/allocate source skip flag entry (free all if NULL) */ |
28 |
+ |
int |
29 |
+ |
sskip_rsi(uby8 *flags) |
30 |
+ |
{ |
31 |
+ |
uby8 *flp; |
32 |
+ |
int i; |
33 |
|
|
34 |
+ |
if (flags == NULL) { /* means clear all */ |
35 |
+ |
efree(srcskipflags); srcskipflags = NULL; |
36 |
+ |
ssf_count = ssf_max = 0; |
37 |
+ |
sskip_free(ssf_noskip); |
38 |
+ |
sskip_free(ssf_select); |
39 |
+ |
return(0); |
40 |
+ |
} |
41 |
+ |
if (ssf_noskip == NULL) /* first call? */ |
42 |
+ |
ssf_noskip = sskip_new(); |
43 |
+ |
|
44 |
+ |
if (sskip_eq(flags, ssf_noskip)) |
45 |
+ |
return(-1); /* nothing to skip */ |
46 |
+ |
/* search recent entries */ |
47 |
+ |
flp = srcskipflags + ssf_count*SSKIPFLSIZ; |
48 |
+ |
for (i = ssf_count; i-- > 0; ) |
49 |
+ |
if (sskip_eq(flp -= SSKIPFLSIZ, flags)) |
50 |
+ |
return(-2-i); /* found it! */ |
51 |
+ |
/* else tack on new entry */ |
52 |
+ |
if (ssf_count >= ssf_max) { /* need more space? */ |
53 |
+ |
fprintf(stderr, "DEBUG: skip flag array > %d entries (%.2f MBytes)\n", |
54 |
+ |
ssf_count, SSKIPFLSIZ/1024./1024.*ssf_count); |
55 |
+ |
ssf_max = ssf_count + (ssf_count>>2) + 64; |
56 |
+ |
if (ssf_max <= ssf_count && |
57 |
+ |
(ssf_max = ssf_count+1024) <= ssf_count) |
58 |
+ |
error(SYSTEM, "out of space in sskip_rsi()"); |
59 |
+ |
|
60 |
+ |
srcskipflags = (uby8 *)erealloc(srcskipflags, |
61 |
+ |
ssf_max*SSKIPFLSIZ); |
62 |
+ |
} |
63 |
+ |
sskip_cpy(srcskipflags + ssf_count*SSKIPFLSIZ, flags); |
64 |
+ |
|
65 |
+ |
return(-2 - ssf_count++); /* return index (< -1) */ |
66 |
+ |
} |
67 |
+ |
|
68 |
+ |
/* Get skip flags associated with RAY rsrc index (or NULL) */ |
69 |
+ |
uby8 * |
70 |
+ |
sskip_flags(int rsi) |
71 |
+ |
{ |
72 |
+ |
if (rsi >= -1) |
73 |
+ |
return(ssf_noskip); |
74 |
+ |
|
75 |
+ |
if ((rsi = -2 - rsi) >= ssf_count) |
76 |
+ |
error(CONSISTENCY, "bad index to sskip_flags()"); |
77 |
+ |
|
78 |
+ |
return(srcskipflags + rsi*SSKIPFLSIZ); |
79 |
+ |
} |
80 |
+ |
|
81 |
+ |
/* OR in a second set of flags into a first */ |
82 |
+ |
void |
83 |
+ |
sskip_addflags(uby8 *dfl, const uby8 *sfl) |
84 |
+ |
{ |
85 |
+ |
int nb = SSKIPFLSIZ; |
86 |
+ |
|
87 |
+ |
while (nb--) |
88 |
+ |
*dfl++ |= *sfl++; |
89 |
+ |
} |
90 |
+ |
#endif |
91 |
+ |
|
92 |
+ |
int |
93 |
+ |
srcskip( /* pre-emptive test for source to skip */ |
94 |
+ |
int sn, |
95 |
+ |
RAY *r |
96 |
+ |
) |
97 |
+ |
{ |
98 |
+ |
SRCREC *sp = source + sn; |
99 |
+ |
|
100 |
+ |
if (sp->sflags & SSKIP) |
101 |
+ |
return(1); |
102 |
+ |
#ifdef SSKIPOPT |
103 |
+ |
if (r->rsrc < -1 && /* ray has custom skip flags? */ |
104 |
+ |
sskip_chk(sskip_flags(r->rsrc), sn)) |
105 |
+ |
return(1); |
106 |
+ |
#endif |
107 |
+ |
if ((sp->sflags & (SPROX|SDISTANT)) != SPROX) |
108 |
+ |
return(0); |
109 |
+ |
|
110 |
+ |
return(dist2(r->rorg, sp->sloc) > |
111 |
+ |
(sp->sl.prox + sp->srad)*(sp->sl.prox + sp->srad)); |
112 |
+ |
} |
113 |
+ |
|
114 |
|
double |
115 |
< |
nextssamp(r, si) /* compute sample for source, rtn. distance */ |
116 |
< |
register RAY *r; /* origin is read, direction is set */ |
117 |
< |
register SRCINDEX *si; /* source index (modified to current) */ |
115 |
> |
nextssamp( /* compute sample for source, rtn. distance */ |
116 |
> |
RAY *r, /* origin is read, direction is set */ |
117 |
> |
SRCINDEX *si /* source index (modified to current) */ |
118 |
> |
) |
119 |
|
{ |
120 |
|
int cent[3], size[3], parr[2]; |
121 |
< |
FVECT vpos; |
121 |
> |
SRCREC *srcp; |
122 |
> |
double vpos[3]; |
123 |
|
double d; |
124 |
< |
register int i; |
124 |
> |
int i; |
125 |
|
nextsample: |
126 |
|
while (++si->sp >= si->np) { /* get next sample */ |
127 |
|
if (++si->sn >= nsources) |
128 |
|
return(0.0); /* no more */ |
129 |
< |
if (source[si->sn].sflags & SSKIP) |
129 |
> |
if (srcskip(si->sn, r)) |
130 |
|
si->np = 0; |
131 |
|
else if (srcsizerat <= FTINY) |
132 |
|
nopart(si, r); |
145 |
|
if (!skipparts(cent, size, parr, si->spt)) |
146 |
|
error(CONSISTENCY, "bad source partition in nextssamp"); |
147 |
|
/* compute sample */ |
148 |
+ |
srcp = source + si->sn; |
149 |
|
if (dstrsrc > FTINY) { /* jitter sample */ |
150 |
|
dimlist[ndims] = si->sn + 8831; |
151 |
|
dimlist[ndims+1] = si->sp + 3109; |
152 |
|
d = urand(ilhash(dimlist,ndims+2)+samplendx); |
153 |
< |
if (source[si->sn].sflags & SFLAT) { |
153 |
> |
if (srcp->sflags & SFLAT) { |
154 |
|
multisamp(vpos, 2, d); |
155 |
< |
vpos[2] = 0.5; |
155 |
> |
vpos[SW] = 0.5; |
156 |
|
} else |
157 |
|
multisamp(vpos, 3, d); |
158 |
|
for (i = 0; i < 3; i++) |
159 |
|
vpos[i] = dstrsrc * (1. - 2.*vpos[i]) * |
160 |
< |
(double)size[i]/MAXSPART; |
160 |
> |
(double)size[i]*(1.0/MAXSPART); |
161 |
|
} else |
162 |
|
vpos[0] = vpos[1] = vpos[2] = 0.0; |
163 |
|
|
164 |
< |
for (i = 0; i < 3; i++) |
165 |
< |
vpos[i] += (double)cent[i]/MAXSPART; |
164 |
> |
VSUM(vpos, vpos, cent, 1.0/MAXSPART); |
165 |
> |
/* avoid circular aiming failures */ |
166 |
> |
if ((srcp->sflags & SCIR) && (si->np > 1) | (dstrsrc > 0.7)) { |
167 |
> |
FVECT trim; |
168 |
> |
if (srcp->sflags & (SFLAT|SDISTANT)) { |
169 |
> |
d = 1.12837917; /* correct setflatss() */ |
170 |
> |
trim[SU] = d*sqrt(1.0 - 0.5*vpos[SV]*vpos[SV]); |
171 |
> |
trim[SV] = d*sqrt(1.0 - 0.5*vpos[SU]*vpos[SU]); |
172 |
> |
trim[SW] = 0.0; |
173 |
> |
} else { |
174 |
> |
trim[SW] = trim[SU] = vpos[SU]*vpos[SU]; |
175 |
> |
d = vpos[SV]*vpos[SV]; |
176 |
> |
if (d > trim[SW]) trim[SW] = d; |
177 |
> |
trim[SU] += d; |
178 |
> |
d = vpos[SW]*vpos[SW]; |
179 |
> |
if (d > trim[SW]) trim[SW] = d; |
180 |
> |
trim[SU] += d; |
181 |
> |
if (trim[SU] > FTINY*FTINY) { |
182 |
> |
d = 1.0/0.7236; /* correct sphsetsrc() */ |
183 |
> |
trim[SW] = trim[SV] = trim[SU] = |
184 |
> |
d*sqrt(trim[SW]/trim[SU]); |
185 |
> |
} else |
186 |
> |
trim[SW] = trim[SV] = trim[SU] = 0.0; |
187 |
> |
} |
188 |
> |
for (i = 0; i < 3; i++) |
189 |
> |
vpos[i] *= trim[i]; |
190 |
> |
} |
191 |
|
/* compute direction */ |
192 |
|
for (i = 0; i < 3; i++) |
193 |
< |
r->rdir[i] = source[si->sn].sloc[i] + |
194 |
< |
vpos[SU]*source[si->sn].ss[SU][i] + |
195 |
< |
vpos[SV]*source[si->sn].ss[SV][i] + |
196 |
< |
vpos[SW]*source[si->sn].ss[SW][i]; |
193 |
> |
r->rdir[i] = srcp->sloc[i] + |
194 |
> |
vpos[SU]*srcp->ss[SU][i] + |
195 |
> |
vpos[SV]*srcp->ss[SV][i] + |
196 |
> |
vpos[SW]*srcp->ss[SW][i]; |
197 |
|
|
198 |
< |
if (!(source[si->sn].sflags & SDISTANT)) |
199 |
< |
for (i = 0; i < 3; i++) |
80 |
< |
r->rdir[i] -= r->rorg[i]; |
198 |
> |
if (!(srcp->sflags & SDISTANT)) |
199 |
> |
VSUB(r->rdir, r->rdir, r->rorg); |
200 |
|
/* compute distance */ |
201 |
|
if ((d = normalize(r->rdir)) == 0.0) |
202 |
|
goto nextsample; /* at source! */ |
203 |
|
|
204 |
|
/* compute sample size */ |
205 |
< |
if (source[si->sn].sflags & SFLAT) { |
205 |
> |
if (srcp->sflags & SFLAT) { |
206 |
|
si->dom = sflatform(si->sn, r->rdir); |
207 |
< |
si->dom *= size[SU]*size[SV]/(MAXSPART*(double)MAXSPART); |
208 |
< |
} else if (source[si->sn].sflags & SCYL) { |
207 |
> |
si->dom *= size[SU]*size[SV]*(1.0/MAXSPART/MAXSPART); |
208 |
> |
} else if (srcp->sflags & SCYL) { |
209 |
|
si->dom = scylform(si->sn, r->rdir); |
210 |
< |
si->dom *= size[SU]/(double)MAXSPART; |
210 |
> |
si->dom *= size[SU]*(1.0/MAXSPART); |
211 |
|
} else { |
212 |
< |
si->dom = size[SU]*size[SV]*(double)size[SW] / |
213 |
< |
(MAXSPART*MAXSPART*(double)MAXSPART) ; |
212 |
> |
si->dom = size[SU]*size[SV]*(double)size[SW] * |
213 |
> |
(1.0/MAXSPART/MAXSPART/MAXSPART) ; |
214 |
|
} |
215 |
< |
if (source[si->sn].sflags & SDISTANT) { |
216 |
< |
si->dom *= source[si->sn].ss2; |
215 |
> |
if (srcp->sflags & SDISTANT) { |
216 |
> |
si->dom *= srcp->ss2; |
217 |
|
return(FHUGE); |
218 |
|
} |
219 |
|
if (si->dom <= 1e-4) |
220 |
|
goto nextsample; /* behind source? */ |
221 |
< |
si->dom *= source[si->sn].ss2/(d*d); |
221 |
> |
si->dom *= srcp->ss2/(d*d); |
222 |
|
return(d); /* sample OK, return distance */ |
223 |
|
} |
224 |
|
|
225 |
|
|
226 |
|
int |
227 |
< |
skipparts(ct, sz, pp, pt) /* skip to requested partition */ |
228 |
< |
int ct[3], sz[3]; /* center and size of partition (returned) */ |
229 |
< |
register int pp[2]; /* current index, number to skip (modified) */ |
230 |
< |
unsigned char *pt; /* partition array */ |
227 |
> |
skipparts( /* skip to requested partition */ |
228 |
> |
int ct[3], |
229 |
> |
int sz[3], /* center and size of partition (returned) */ |
230 |
> |
int pp[2], /* current index, number to skip (modified) */ |
231 |
> |
unsigned char *pt /* partition array */ |
232 |
> |
) |
233 |
|
{ |
234 |
< |
register int p; |
234 |
> |
int p; |
235 |
|
/* check this partition */ |
236 |
|
p = spart(pt, pp[0]); |
237 |
|
pp[0]++; |
259 |
|
|
260 |
|
|
261 |
|
void |
262 |
< |
nopart(si, r) /* single source partition */ |
263 |
< |
register SRCINDEX *si; |
264 |
< |
RAY *r; |
262 |
> |
nopart( /* single source partition */ |
263 |
> |
SRCINDEX *si, |
264 |
> |
RAY *r |
265 |
> |
) |
266 |
|
{ |
267 |
|
clrpart(si->spt); |
268 |
|
setpart(si->spt, 0, S0); |
270 |
|
} |
271 |
|
|
272 |
|
|
151 |
– |
void |
152 |
– |
cylpart(si, r) /* partition a cylinder */ |
153 |
– |
SRCINDEX *si; |
154 |
– |
register RAY *r; |
155 |
– |
{ |
156 |
– |
double dist2, safedist2, dist2cent, rad2; |
157 |
– |
FVECT v; |
158 |
– |
register SRCREC *sp; |
159 |
– |
int pi; |
160 |
– |
/* first check point location */ |
161 |
– |
clrpart(si->spt); |
162 |
– |
sp = source + si->sn; |
163 |
– |
rad2 = 1.365 * DOT(sp->ss[SV],sp->ss[SV]); |
164 |
– |
v[0] = r->rorg[0] - sp->sloc[0]; |
165 |
– |
v[1] = r->rorg[1] - sp->sloc[1]; |
166 |
– |
v[2] = r->rorg[2] - sp->sloc[2]; |
167 |
– |
dist2 = DOT(v,sp->ss[SU]); |
168 |
– |
safedist2 = DOT(sp->ss[SU],sp->ss[SU]); |
169 |
– |
dist2 *= dist2 / safedist2; |
170 |
– |
dist2cent = DOT(v,v); |
171 |
– |
dist2 = dist2cent - dist2; |
172 |
– |
if (dist2 <= rad2) { /* point inside extended cylinder */ |
173 |
– |
si->np = 0; |
174 |
– |
return; |
175 |
– |
} |
176 |
– |
safedist2 *= 4.*r->rweight*r->rweight/(srcsizerat*srcsizerat); |
177 |
– |
if (dist2 <= 4.*rad2 || /* point too close to subdivide */ |
178 |
– |
dist2cent >= safedist2) { /* or too far */ |
179 |
– |
setpart(si->spt, 0, S0); |
180 |
– |
si->np = 1; |
181 |
– |
return; |
182 |
– |
} |
183 |
– |
pi = 0; |
184 |
– |
si->np = cyl_partit(r->rorg, si->spt, &pi, MAXSPART, |
185 |
– |
sp->sloc, sp->ss[SU], safedist2); |
186 |
– |
} |
187 |
– |
|
188 |
– |
|
273 |
|
static int |
274 |
< |
cyl_partit(ro, pt, pi, mp, cent, axis, d2) /* slice a cylinder */ |
275 |
< |
FVECT ro; |
276 |
< |
unsigned char *pt; |
277 |
< |
register int *pi; |
278 |
< |
int mp; |
279 |
< |
FVECT cent, axis; |
280 |
< |
double d2; |
274 |
> |
cyl_partit( /* slice a cylinder */ |
275 |
> |
FVECT ro, |
276 |
> |
unsigned char *pt, |
277 |
> |
int *pi, |
278 |
> |
int mp, |
279 |
> |
FVECT cent, |
280 |
> |
FVECT axis, |
281 |
> |
double d2 |
282 |
> |
) |
283 |
|
{ |
284 |
|
FVECT newct, newax; |
285 |
|
int npl, npu; |
312 |
|
|
313 |
|
|
314 |
|
void |
315 |
< |
flatpart(si, r) /* partition a flat source */ |
316 |
< |
register SRCINDEX *si; |
317 |
< |
register RAY *r; |
315 |
> |
cylpart( /* partition a cylinder */ |
316 |
> |
SRCINDEX *si, |
317 |
> |
RAY *r |
318 |
> |
) |
319 |
|
{ |
320 |
< |
register RREAL *vp; |
320 |
> |
double dist2, safedist2, dist2cent, rad2; |
321 |
|
FVECT v; |
322 |
< |
double du2, dv2; |
322 |
> |
SRCREC *sp; |
323 |
|
int pi; |
324 |
< |
|
324 |
> |
/* first check point location */ |
325 |
|
clrpart(si->spt); |
326 |
< |
vp = source[si->sn].sloc; |
327 |
< |
v[0] = r->rorg[0] - vp[0]; |
328 |
< |
v[1] = r->rorg[1] - vp[1]; |
329 |
< |
v[2] = r->rorg[2] - vp[2]; |
330 |
< |
vp = source[si->sn].snorm; |
331 |
< |
if (DOT(v,vp) <= 0.) { /* behind source */ |
326 |
> |
sp = source + si->sn; |
327 |
> |
rad2 = 1.365 * DOT(sp->ss[SV],sp->ss[SV]); |
328 |
> |
v[0] = r->rorg[0] - sp->sloc[0]; |
329 |
> |
v[1] = r->rorg[1] - sp->sloc[1]; |
330 |
> |
v[2] = r->rorg[2] - sp->sloc[2]; |
331 |
> |
dist2 = DOT(v,sp->ss[SU]); |
332 |
> |
safedist2 = DOT(sp->ss[SU],sp->ss[SU]); |
333 |
> |
dist2 *= dist2 / safedist2; |
334 |
> |
dist2cent = DOT(v,v); |
335 |
> |
dist2 = dist2cent - dist2; |
336 |
> |
if (dist2 <= rad2) { /* point inside extended cylinder */ |
337 |
|
si->np = 0; |
338 |
|
return; |
339 |
|
} |
340 |
< |
dv2 = 2.*r->rweight/srcsizerat; |
341 |
< |
dv2 *= dv2; |
342 |
< |
vp = source[si->sn].ss[SU]; |
343 |
< |
du2 = dv2 * DOT(vp,vp); |
344 |
< |
vp = source[si->sn].ss[SV]; |
345 |
< |
dv2 *= DOT(vp,vp); |
340 |
> |
safedist2 *= 4.*r->rweight*r->rweight/(srcsizerat*srcsizerat); |
341 |
> |
if (dist2 <= 4.*rad2 || /* point too close to subdivide */ |
342 |
> |
dist2cent >= safedist2) { /* or too far */ |
343 |
> |
setpart(si->spt, 0, S0); |
344 |
> |
si->np = 1; |
345 |
> |
return; |
346 |
> |
} |
347 |
|
pi = 0; |
348 |
< |
si->np = flt_partit(r->rorg, si->spt, &pi, MAXSPART, |
349 |
< |
source[si->sn].sloc, |
257 |
< |
source[si->sn].ss[SU], source[si->sn].ss[SV], du2, dv2); |
348 |
> |
si->np = cyl_partit(r->rorg, si->spt, &pi, MAXSPART, |
349 |
> |
sp->sloc, sp->ss[SU], safedist2); |
350 |
|
} |
351 |
|
|
352 |
|
|
353 |
|
static int |
354 |
< |
flt_partit(ro, pt, pi, mp, cent, u, v, du2, dv2) /* partition flatty */ |
355 |
< |
FVECT ro; |
356 |
< |
unsigned char *pt; |
357 |
< |
register int *pi; |
358 |
< |
int mp; |
359 |
< |
FVECT cent, u, v; |
360 |
< |
double du2, dv2; |
354 |
> |
flt_partit( /* partition flatty */ |
355 |
> |
FVECT ro, |
356 |
> |
unsigned char *pt, |
357 |
> |
int *pi, |
358 |
> |
int mp, |
359 |
> |
FVECT cent, |
360 |
> |
FVECT u, |
361 |
> |
FVECT v, |
362 |
> |
double du2, |
363 |
> |
double dv2 |
364 |
> |
) |
365 |
|
{ |
366 |
|
double d2; |
367 |
|
FVECT newct, newax; |
405 |
|
} |
406 |
|
|
407 |
|
|
408 |
+ |
void |
409 |
+ |
flatpart( /* partition a flat source */ |
410 |
+ |
SRCINDEX *si, |
411 |
+ |
RAY *r |
412 |
+ |
) |
413 |
+ |
{ |
414 |
+ |
RREAL *vp; |
415 |
+ |
FVECT v; |
416 |
+ |
double du2, dv2; |
417 |
+ |
int pi; |
418 |
+ |
|
419 |
+ |
clrpart(si->spt); |
420 |
+ |
vp = source[si->sn].sloc; |
421 |
+ |
v[0] = r->rorg[0] - vp[0]; |
422 |
+ |
v[1] = r->rorg[1] - vp[1]; |
423 |
+ |
v[2] = r->rorg[2] - vp[2]; |
424 |
+ |
vp = source[si->sn].snorm; |
425 |
+ |
if (DOT(v,vp) <= 0.) { /* behind source */ |
426 |
+ |
si->np = 0; |
427 |
+ |
return; |
428 |
+ |
} |
429 |
+ |
dv2 = 2.*r->rweight/srcsizerat; |
430 |
+ |
dv2 *= dv2; |
431 |
+ |
vp = source[si->sn].ss[SU]; |
432 |
+ |
du2 = dv2 * DOT(vp,vp); |
433 |
+ |
vp = source[si->sn].ss[SV]; |
434 |
+ |
dv2 *= DOT(vp,vp); |
435 |
+ |
pi = 0; |
436 |
+ |
si->np = flt_partit(r->rorg, si->spt, &pi, MAXSPART, |
437 |
+ |
source[si->sn].sloc, |
438 |
+ |
source[si->sn].ss[SU], source[si->sn].ss[SV], du2, dv2); |
439 |
+ |
} |
440 |
+ |
|
441 |
+ |
|
442 |
|
double |
443 |
< |
scylform(sn, dir) /* compute cosine for cylinder's projection */ |
444 |
< |
int sn; |
445 |
< |
register FVECT dir; /* assume normalized */ |
443 |
> |
scylform( /* compute cosine for cylinder's projection */ |
444 |
> |
int sn, |
445 |
> |
FVECT dir /* assume normalized */ |
446 |
> |
) |
447 |
|
{ |
448 |
< |
register RREAL *dv; |
448 |
> |
RREAL *dv; |
449 |
|
double d; |
450 |
|
|
451 |
|
dv = source[sn].ss[SU]; |