1 |
< |
/* Copyright (c) 1986 Regents of the University of California */ |
1 |
> |
/* Copyright (c) 1993 Regents of the University of California */ |
2 |
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|
3 |
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#ifndef lint |
4 |
|
static char SCCSid[] = "$SunId$ LBL"; |
14 |
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|
15 |
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#include "octree.h" |
16 |
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|
17 |
– |
#include "source.h" |
18 |
– |
|
17 |
|
#include "otypes.h" |
18 |
|
|
19 |
< |
#include "cone.h" |
19 |
> |
#include "source.h" |
20 |
|
|
21 |
< |
#include "face.h" |
21 |
> |
/* |
22 |
> |
* Structures used by direct() |
23 |
> |
*/ |
24 |
|
|
25 |
< |
#include "random.h" |
25 |
> |
typedef struct { |
26 |
> |
int sno; /* source number */ |
27 |
> |
FVECT dir; /* source direction */ |
28 |
> |
COLOR coef; /* material coefficient */ |
29 |
> |
COLOR val; /* contribution */ |
30 |
> |
} CONTRIB; /* direct contribution */ |
31 |
|
|
32 |
+ |
typedef struct { |
33 |
+ |
int sndx; /* source index (to CONTRIB array) */ |
34 |
+ |
float brt; /* brightness (for comparison) */ |
35 |
+ |
} CNTPTR; /* contribution pointer */ |
36 |
|
|
37 |
< |
extern double dstrsrc; /* source distribution amount */ |
38 |
< |
extern double shadthresh; /* relative shadow threshold */ |
37 |
> |
static CONTRIB *srccnt; /* source contributions in direct() */ |
38 |
> |
static CNTPTR *cntord; /* source ordering in direct() */ |
39 |
> |
static int maxcntr = 0; /* size of contribution arrays */ |
40 |
|
|
31 |
– |
SRCREC *source = NULL; /* our list of sources */ |
32 |
– |
int nsources = 0; /* the number of sources */ |
41 |
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|
34 |
– |
|
42 |
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marksources() /* find and mark source objects */ |
43 |
|
{ |
44 |
+ |
int foundsource = 0; |
45 |
+ |
int i; |
46 |
|
register OBJREC *o, *m; |
47 |
< |
register int i; |
48 |
< |
|
47 |
> |
register int ns; |
48 |
> |
/* initialize dispatch table */ |
49 |
> |
initstypes(); |
50 |
> |
/* find direct sources */ |
51 |
|
for (i = 0; i < nobjects; i++) { |
52 |
|
|
53 |
|
o = objptr(i); |
54 |
|
|
55 |
< |
if (o->omod == OVOID) |
55 |
> |
if (!issurface(o->otype) || o->omod == OVOID) |
56 |
|
continue; |
57 |
|
|
58 |
|
m = objptr(o->omod); |
59 |
|
|
60 |
< |
if (m->otype != MAT_LIGHT && |
50 |
< |
m->otype != MAT_ILLUM && |
51 |
< |
m->otype != MAT_GLOW && |
52 |
< |
m->otype != MAT_SPOT) |
60 |
> |
if (!islight(m->otype)) |
61 |
|
continue; |
62 |
|
|
63 |
|
if (m->oargs.nfargs != (m->otype == MAT_GLOW ? 4 : |
69 |
|
m->oargs.farg[3] <= FTINY) |
70 |
|
continue; /* don't bother */ |
71 |
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|
72 |
< |
if (source == NULL) |
73 |
< |
source = (SRCREC *)malloc(sizeof(SRCREC)); |
74 |
< |
else |
67 |
< |
source = (SRCREC *)realloc((char *)source, |
68 |
< |
(unsigned)(nsources+1)*sizeof(SRCREC)); |
69 |
< |
if (source == NULL) |
70 |
< |
error(SYSTEM, "out of memory in marksources"); |
72 |
> |
if (sfun[o->otype].of == NULL || |
73 |
> |
sfun[o->otype].of->setsrc == NULL) |
74 |
> |
objerror(o, USER, "illegal material"); |
75 |
|
|
76 |
< |
newsource(&source[nsources], o); |
76 |
> |
if ((ns = newsource()) < 0) |
77 |
> |
goto memerr; |
78 |
|
|
79 |
+ |
setsource(&source[ns], o); |
80 |
+ |
|
81 |
|
if (m->otype == MAT_GLOW) { |
82 |
< |
source[nsources].sflags |= SPROX; |
83 |
< |
source[nsources].sl.prox = m->oargs.farg[3]; |
84 |
< |
if (o->otype == OBJ_SOURCE) |
85 |
< |
source[nsources].sflags |= SSKIP; |
82 |
> |
source[ns].sflags |= SPROX; |
83 |
> |
source[ns].sl.prox = m->oargs.farg[3]; |
84 |
> |
if (source[ns].sflags & SDISTANT) |
85 |
> |
source[ns].sflags |= SSKIP; |
86 |
|
} else if (m->otype == MAT_SPOT) { |
87 |
< |
source[nsources].sflags |= SSPOT; |
88 |
< |
source[nsources].sl.s = makespot(m); |
87 |
> |
source[ns].sflags |= SSPOT; |
88 |
> |
if ((source[ns].sl.s = makespot(m)) == NULL) |
89 |
> |
goto memerr; |
90 |
> |
if (source[ns].sflags & SFLAT && |
91 |
> |
!checkspot(source[ns].sl.s,source[ns].snorm)) { |
92 |
> |
objerror(o, WARNING, |
93 |
> |
"invalid spotlight direction"); |
94 |
> |
source[ns].sflags |= SSKIP; |
95 |
> |
} |
96 |
|
} |
97 |
< |
nsources++; |
97 |
> |
if (!(source[ns].sflags & SSKIP)) |
98 |
> |
foundsource++; |
99 |
|
} |
100 |
< |
} |
101 |
< |
|
102 |
< |
|
88 |
< |
newsource(src, so) /* add a source to the array */ |
89 |
< |
register SRCREC *src; |
90 |
< |
register OBJREC *so; |
91 |
< |
{ |
92 |
< |
double cos(), tan(), sqrt(); |
93 |
< |
double theta; |
94 |
< |
FACE *f; |
95 |
< |
CONE *co; |
96 |
< |
int j; |
97 |
< |
register int i; |
98 |
< |
|
99 |
< |
src->sflags = 0; |
100 |
< |
src->nhits = 1; src->ntests = 2; /* start probability = 1/2 */ |
101 |
< |
src->so = so; |
102 |
< |
|
103 |
< |
switch (so->otype) { |
104 |
< |
case OBJ_SOURCE: |
105 |
< |
if (so->oargs.nfargs != 4) |
106 |
< |
objerror(so, USER, "bad arguments"); |
107 |
< |
src->sflags |= SDISTANT; |
108 |
< |
VCOPY(src->sloc, so->oargs.farg); |
109 |
< |
if (normalize(src->sloc) == 0.0) |
110 |
< |
objerror(so, USER, "zero direction"); |
111 |
< |
theta = PI/180.0/2.0 * so->oargs.farg[3]; |
112 |
< |
if (theta <= FTINY) |
113 |
< |
objerror(so, USER, "zero size"); |
114 |
< |
src->ss = theta >= PI/4 ? 1.0 : tan(theta); |
115 |
< |
src->ss2 = 2.0*PI * (1.0 - cos(theta)); |
116 |
< |
break; |
117 |
< |
case OBJ_SPHERE: |
118 |
< |
VCOPY(src->sloc, so->oargs.farg); |
119 |
< |
src->ss = so->oargs.farg[3]; |
120 |
< |
src->ss2 = PI * src->ss * src->ss; |
121 |
< |
break; |
122 |
< |
case OBJ_FACE: |
123 |
< |
/* get the face */ |
124 |
< |
f = getface(so); |
125 |
< |
/* find the center */ |
126 |
< |
for (j = 0; j < 3; j++) { |
127 |
< |
src->sloc[j] = 0.0; |
128 |
< |
for (i = 0; i < f->nv; i++) |
129 |
< |
src->sloc[j] += VERTEX(f,i)[j]; |
130 |
< |
src->sloc[j] /= f->nv; |
131 |
< |
} |
132 |
< |
if (!inface(src->sloc, f)) |
133 |
< |
objerror(so, USER, "cannot hit center"); |
134 |
< |
src->ss = sqrt(f->area / PI); |
135 |
< |
src->ss2 = f->area; |
136 |
< |
break; |
137 |
< |
case OBJ_RING: |
138 |
< |
/* get the ring */ |
139 |
< |
co = getcone(so, 0); |
140 |
< |
VCOPY(src->sloc, CO_P0(co)); |
141 |
< |
if (CO_R0(co) > 0.0) |
142 |
< |
objerror(so, USER, "cannot hit center"); |
143 |
< |
src->ss = CO_R1(co); |
144 |
< |
src->ss2 = PI * src->ss * src->ss; |
145 |
< |
break; |
146 |
< |
default: |
147 |
< |
objerror(so, USER, "illegal material"); |
100 |
> |
if (!foundsource) { |
101 |
> |
error(WARNING, "no light sources found"); |
102 |
> |
return; |
103 |
|
} |
104 |
+ |
markvirtuals(); /* find and add virtual sources */ |
105 |
+ |
/* allocate our contribution arrays */ |
106 |
+ |
maxcntr = nsources + MAXSPART; /* start with this many */ |
107 |
+ |
srccnt = (CONTRIB *)malloc(maxcntr*sizeof(CONTRIB)); |
108 |
+ |
cntord = (CNTPTR *)malloc(maxcntr*sizeof(CNTPTR)); |
109 |
+ |
if (srccnt == NULL | cntord == NULL) |
110 |
+ |
goto memerr; |
111 |
+ |
return; |
112 |
+ |
memerr: |
113 |
+ |
error(SYSTEM, "out of memory in marksources"); |
114 |
|
} |
115 |
|
|
116 |
|
|
117 |
< |
SPOT * |
153 |
< |
makespot(m) /* make a spotlight */ |
154 |
< |
register OBJREC *m; |
155 |
< |
{ |
156 |
< |
extern double cos(); |
157 |
< |
register SPOT *ns; |
158 |
< |
|
159 |
< |
if ((ns = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
160 |
< |
error(SYSTEM, "out of memory in makespot"); |
161 |
< |
ns->siz = 2.0*PI * (1.0 - cos(PI/180.0/2.0 * m->oargs.farg[3])); |
162 |
< |
VCOPY(ns->aim, m->oargs.farg+4); |
163 |
< |
if ((ns->flen = normalize(ns->aim)) == 0.0) |
164 |
< |
objerror(m, USER, "zero focus vector"); |
165 |
< |
return(ns); |
166 |
< |
} |
167 |
< |
|
168 |
< |
|
169 |
< |
double |
170 |
< |
srcray(sr, r, sn) /* send a ray to a source, return domega */ |
117 |
> |
srcray(sr, r, si) /* send a ray to a source, return domega */ |
118 |
|
register RAY *sr; /* returned source ray */ |
119 |
|
RAY *r; /* ray which hit object */ |
120 |
< |
register int sn; /* source number */ |
120 |
> |
SRCINDEX *si; /* source sample index */ |
121 |
|
{ |
122 |
< |
register double *norm = NULL; /* plane normal */ |
123 |
< |
double ddot; /* (distance times) cosine */ |
177 |
< |
FVECT vd; |
178 |
< |
double d; |
179 |
< |
register int i; |
122 |
> |
double d; /* distance to source */ |
123 |
> |
register SRCREC *srcp; |
124 |
|
|
125 |
< |
if (source[sn].sflags & SSKIP) |
182 |
< |
return(0.0); /* skip this source */ |
125 |
> |
rayorigin(sr, r, SHADOW, 1.0); /* ignore limits */ |
126 |
|
|
127 |
< |
rayorigin(sr, r, SHADOW, 1.0); /* ignore limits */ |
128 |
< |
|
129 |
< |
sr->rsrc = sn; /* remember source */ |
130 |
< |
/* get source direction */ |
131 |
< |
if (source[sn].sflags & SDISTANT) |
132 |
< |
/* constant direction */ |
133 |
< |
VCOPY(sr->rdir, source[sn].sloc); |
191 |
< |
else { /* compute direction */ |
192 |
< |
for (i = 0; i < 3; i++) |
193 |
< |
sr->rdir[i] = source[sn].sloc[i] - sr->rorg[i]; |
194 |
< |
|
195 |
< |
if (source[sn].so->otype == OBJ_FACE) |
196 |
< |
norm = getface(source[sn].so)->norm; |
197 |
< |
else if (source[sn].so->otype == OBJ_RING) |
198 |
< |
norm = getcone(source[sn].so,0)->ad; |
199 |
< |
|
200 |
< |
if (norm != NULL && (ddot = -DOT(sr->rdir, norm)) <= FTINY) |
201 |
< |
return(0.0); /* behind surface! */ |
127 |
> |
while ((d = nextssamp(sr, si)) != 0.0) { |
128 |
> |
sr->rsrc = si->sn; /* remember source */ |
129 |
> |
srcp = source + si->sn; |
130 |
> |
if (srcp->sflags & SDISTANT) { |
131 |
> |
if (srcp->sflags & SSPOT && spotout(sr, srcp->sl.s, 1)) |
132 |
> |
continue; |
133 |
> |
return(1); /* sample OK */ |
134 |
|
} |
135 |
< |
if (dstrsrc > FTINY) { |
136 |
< |
/* distribute source direction */ |
137 |
< |
for (i = 0; i < 3; i++) |
138 |
< |
vd[i] = dstrsrc * source[sn].ss * (1.0 - 2.0*frandom()); |
135 |
> |
/* local source */ |
136 |
> |
/* check proximity */ |
137 |
> |
if (srcp->sflags & SPROX && d > srcp->sl.prox) |
138 |
> |
continue; |
139 |
> |
/* check angle */ |
140 |
> |
if (srcp->sflags & SSPOT) { |
141 |
> |
if (spotout(sr, srcp->sl.s, 0)) |
142 |
> |
continue; |
143 |
> |
/* adjust solid angle */ |
144 |
> |
si->dom *= d*d; |
145 |
> |
d += srcp->sl.s->flen; |
146 |
> |
si->dom /= d*d; |
147 |
> |
} |
148 |
> |
return(1); /* sample OK */ |
149 |
> |
} |
150 |
> |
return(0); /* no more samples */ |
151 |
> |
} |
152 |
|
|
208 |
– |
if (norm != NULL) { /* project offset */ |
209 |
– |
d = DOT(vd, norm); |
210 |
– |
for (i = 0; i < 3; i++) |
211 |
– |
vd[i] -= d * norm[i]; |
212 |
– |
} |
213 |
– |
for (i = 0; i < 3; i++) /* offset source direction */ |
214 |
– |
sr->rdir[i] += vd[i]; |
153 |
|
|
154 |
< |
} else if (source[sn].sflags & SDISTANT) |
155 |
< |
/* already normalized */ |
156 |
< |
return(source[sn].ss2); |
154 |
> |
srcvalue(r) /* punch ray to source and compute value */ |
155 |
> |
register RAY *r; |
156 |
> |
{ |
157 |
> |
register SRCREC *sp; |
158 |
|
|
159 |
< |
if ((d = normalize(sr->rdir)) == 0.0) |
160 |
< |
/* at source! */ |
161 |
< |
return(0.0); |
162 |
< |
|
163 |
< |
if (source[sn].sflags & SDISTANT) |
164 |
< |
/* domega constant */ |
165 |
< |
return(source[sn].ss2); |
166 |
< |
|
228 |
< |
else { |
229 |
< |
/* check proximity */ |
230 |
< |
if (source[sn].sflags & SPROX && |
231 |
< |
d > source[sn].sl.prox) |
232 |
< |
return(0.0); |
233 |
< |
|
234 |
< |
if (norm != NULL) |
235 |
< |
ddot /= d; |
236 |
< |
else |
237 |
< |
ddot = 1.0; |
238 |
< |
/* check angle */ |
239 |
< |
if (source[sn].sflags & SSPOT) { |
240 |
< |
if (source[sn].sl.s->siz < 2.0*PI * |
241 |
< |
(1.0 + DOT(source[sn].sl.s->aim,sr->rdir))) |
242 |
< |
return(0.0); |
243 |
< |
d += source[sn].sl.s->flen; |
244 |
< |
} |
245 |
< |
/* return domega */ |
246 |
< |
return(ddot*source[sn].ss2/(d*d)); |
159 |
> |
sp = &source[r->rsrc]; |
160 |
> |
if (sp->sflags & SVIRTUAL) { /* virtual source */ |
161 |
> |
/* check intersection */ |
162 |
> |
if (!(*ofun[sp->so->otype].funp)(sp->so, r)) |
163 |
> |
return; |
164 |
> |
if (!rayshade(r, r->ro->omod)) /* compute contribution */ |
165 |
> |
goto nomat; |
166 |
> |
return; |
167 |
|
} |
168 |
+ |
/* compute intersection */ |
169 |
+ |
if (sp->sflags & SDISTANT ? sourcehit(r) : |
170 |
+ |
(*ofun[sp->so->otype].funp)(sp->so, r)) { |
171 |
+ |
if (sp->sa.success >= 0) |
172 |
+ |
sp->sa.success++; |
173 |
+ |
if (!rayshade(r, r->ro->omod)) /* compute contribution */ |
174 |
+ |
goto nomat; |
175 |
+ |
return; |
176 |
+ |
} |
177 |
+ |
/* we missed our mark! */ |
178 |
+ |
if (sp->sa.success < 0) |
179 |
+ |
return; /* bitched already */ |
180 |
+ |
sp->sa.success -= AIMREQT; |
181 |
+ |
if (sp->sa.success >= 0) |
182 |
+ |
return; /* leniency */ |
183 |
+ |
sprintf(errmsg, "aiming failure for light source \"%s\"", |
184 |
+ |
sp->so->oname); |
185 |
+ |
error(WARNING, errmsg); /* issue warning */ |
186 |
+ |
return; |
187 |
+ |
nomat: |
188 |
+ |
objerror(r->ro, USER, "material not found"); |
189 |
|
} |
190 |
|
|
191 |
|
|
201 |
|
first = 0; last = nsources-1; |
202 |
|
} |
203 |
|
for (i = first; i <= last; i++) |
204 |
< |
if (source[i].sflags & SDISTANT) |
204 |
> |
if ((source[i].sflags & (SDISTANT|SVIRTUAL)) == SDISTANT) |
205 |
|
/* |
206 |
|
* Check to see if ray is within |
207 |
|
* solid angle of source. |
217 |
|
for (i = 0; i < 3; i++) |
218 |
|
r->ron[i] = -r->rdir[i]; |
219 |
|
r->rod = 1.0; |
220 |
< |
r->rofs = 1.0; setident4(r->rofx); |
280 |
< |
r->robs = 1.0; setident4(r->robx); |
220 |
> |
r->rox = NULL; |
221 |
|
return(1); |
222 |
|
} |
223 |
|
return(0); |
241 |
|
int (*f)(); /* direct component coefficient function */ |
242 |
|
char *p; /* data for f */ |
243 |
|
{ |
244 |
+ |
extern int (*trace)(); |
245 |
|
register int sn; |
246 |
< |
register CONTRIB *srccnt; |
247 |
< |
register CNTPTR *cntord; |
248 |
< |
double prob, ourthresh, hwt, test2, hit2; |
246 |
> |
register CONTRIB *scp; |
247 |
> |
SRCINDEX si; |
248 |
> |
int nshadcheck, ncnts; |
249 |
> |
int nhits; |
250 |
> |
double prob, ourthresh, hwt; |
251 |
|
RAY sr; |
252 |
< |
|
253 |
< |
srccnt = (CONTRIB *)malloc(nsources*sizeof(CONTRIB)); |
254 |
< |
cntord = (CNTPTR *)malloc(nsources*sizeof(CNTPTR)); |
312 |
< |
if (srccnt == NULL || cntord == NULL) |
313 |
< |
error(SYSTEM, "out of memory in direct"); |
314 |
< |
/* modify threshold */ |
315 |
< |
ourthresh = shadthresh / r->rweight; |
252 |
> |
/* NOTE: srccnt and cntord global so no recursion */ |
253 |
> |
if (nsources <= 0) |
254 |
> |
return; /* no sources?! */ |
255 |
|
/* potential contributions */ |
256 |
< |
for (sn = 0; sn < nsources; sn++) { |
257 |
< |
cntord[sn].sno = sn; |
258 |
< |
cntord[sn].brt = 0.0; |
259 |
< |
/* get source ray */ |
260 |
< |
if ((srccnt[sn].dom = srcray(&sr, r, sn)) == 0.0) |
261 |
< |
continue; |
262 |
< |
VCOPY(srccnt[sn].dir, sr.rdir); |
256 |
> |
initsrcindex(&si); |
257 |
> |
for (sn = 0; srcray(&sr, r, &si); sn++) { |
258 |
> |
if (sn >= maxcntr) { |
259 |
> |
maxcntr = sn + MAXSPART; |
260 |
> |
srccnt = (CONTRIB *)realloc((char *)srccnt, |
261 |
> |
maxcntr*sizeof(CONTRIB)); |
262 |
> |
cntord = (CNTPTR *)realloc((char *)cntord, |
263 |
> |
maxcntr*sizeof(CNTPTR)); |
264 |
> |
if (srccnt == NULL | cntord == NULL) |
265 |
> |
error(SYSTEM, "out of memory in direct"); |
266 |
> |
} |
267 |
> |
cntord[sn].sndx = sn; |
268 |
> |
scp = srccnt + sn; |
269 |
> |
scp->sno = sr.rsrc; |
270 |
|
/* compute coefficient */ |
271 |
< |
(*f)(srccnt[sn].val, p, srccnt[sn].dir, srccnt[sn].dom); |
272 |
< |
cntord[sn].brt = bright(srccnt[sn].val); |
273 |
< |
if (cntord[sn].brt <= FTINY) |
271 |
> |
(*f)(scp->coef, p, sr.rdir, si.dom); |
272 |
> |
cntord[sn].brt = bright(scp->coef); |
273 |
> |
if (cntord[sn].brt <= 0.0) |
274 |
|
continue; |
275 |
< |
/* compute intersection */ |
276 |
< |
if (!( source[sn].sflags & SDISTANT ? |
277 |
< |
sourcehit(&sr) : |
278 |
< |
(*ofun[source[sn].so->otype].funp) |
279 |
< |
(source[sn].so, &sr) )) |
280 |
< |
continue; |
281 |
< |
/* compute contribution */ |
336 |
< |
rayshade(&sr, sr.ro->omod); |
337 |
< |
multcolor(srccnt[sn].val, sr.rcol); |
338 |
< |
cntord[sn].brt = bright(srccnt[sn].val); |
275 |
> |
VCOPY(scp->dir, sr.rdir); |
276 |
> |
/* compute potential */ |
277 |
> |
sr.revf = srcvalue; |
278 |
> |
rayvalue(&sr); |
279 |
> |
copycolor(scp->val, sr.rcol); |
280 |
> |
multcolor(scp->val, scp->coef); |
281 |
> |
cntord[sn].brt = bright(scp->val); |
282 |
|
} |
283 |
|
/* sort contributions */ |
284 |
< |
qsort(cntord, nsources, sizeof(CNTPTR), cntcmp); |
285 |
< |
hit2 = 0.0; test2 = FTINY; |
284 |
> |
qsort(cntord, sn, sizeof(CNTPTR), cntcmp); |
285 |
> |
{ /* find last */ |
286 |
> |
register int l, m; |
287 |
> |
|
288 |
> |
ncnts = l = sn; |
289 |
> |
sn = 0; |
290 |
> |
while ((m = (sn + ncnts) >> 1) != l) { |
291 |
> |
if (cntord[m].brt > 0.0) |
292 |
> |
sn = m; |
293 |
> |
else |
294 |
> |
ncnts = m; |
295 |
> |
l = m; |
296 |
> |
} |
297 |
> |
} |
298 |
> |
if (ncnts == 0) |
299 |
> |
return; /* no contributions! */ |
300 |
> |
/* accumulate tail */ |
301 |
> |
for (sn = ncnts-1; sn > 0; sn--) |
302 |
> |
cntord[sn-1].brt += cntord[sn].brt; |
303 |
> |
/* compute number to check */ |
304 |
> |
nshadcheck = pow((double)ncnts, shadcert) + .5; |
305 |
> |
/* modify threshold */ |
306 |
> |
ourthresh = shadthresh / r->rweight; |
307 |
|
/* test for shadows */ |
308 |
< |
for (sn = 0; sn < nsources; sn++) { |
308 |
> |
for (nhits = 0, hwt = 0.0, sn = 0; sn < ncnts; |
309 |
> |
hwt += (double)source[scp->sno].nhits / |
310 |
> |
(double)source[scp->sno].ntests, |
311 |
> |
sn++) { |
312 |
|
/* check threshold */ |
313 |
< |
if (cntord[sn].brt <= ourthresh*bright(r->rcol)) |
313 |
> |
if ((sn+nshadcheck>=ncnts ? cntord[sn].brt : |
314 |
> |
cntord[sn].brt-cntord[sn+nshadcheck].brt) |
315 |
> |
< ourthresh*bright(r->rcol)) |
316 |
|
break; |
317 |
< |
/* get statistics */ |
349 |
< |
hwt = (double)source[cntord[sn].sno].nhits / |
350 |
< |
(double)source[cntord[sn].sno].ntests; |
351 |
< |
test2 += hwt; |
352 |
< |
source[cntord[sn].sno].ntests++; |
317 |
> |
scp = srccnt + cntord[sn].sndx; |
318 |
|
/* test for hit */ |
319 |
|
rayorigin(&sr, r, SHADOW, 1.0); |
320 |
< |
VCOPY(sr.rdir, srccnt[cntord[sn].sno].dir); |
320 |
> |
VCOPY(sr.rdir, scp->dir); |
321 |
> |
sr.rsrc = scp->sno; |
322 |
> |
source[scp->sno].ntests++; /* keep statistics */ |
323 |
|
if (localhit(&sr, &thescene) && |
324 |
< |
sr.ro != source[cntord[sn].sno].so) { |
325 |
< |
/* check for transmission */ |
326 |
< |
if (sr.clipset != NULL && inset(sr.clipset,sr.ro->omod)) |
327 |
< |
raytrans(&sr); /* object is clipped */ |
328 |
< |
else |
329 |
< |
rayshade(&sr, sr.ro->omod); |
324 |
> |
( sr.ro != source[scp->sno].so || |
325 |
> |
source[scp->sno].sflags & SFOLLOW )) { |
326 |
> |
/* follow entire path */ |
327 |
> |
if (!raycont(&sr)) |
328 |
> |
objerror(sr.ro, USER, "material not found"); |
329 |
> |
if (trace != NULL) |
330 |
> |
(*trace)(&sr); /* trace execution */ |
331 |
|
if (bright(sr.rcol) <= FTINY) |
332 |
|
continue; /* missed! */ |
333 |
< |
(*f)(srccnt[cntord[sn].sno].val, p, |
334 |
< |
srccnt[cntord[sn].sno].dir, |
367 |
< |
srccnt[cntord[sn].sno].dom); |
368 |
< |
multcolor(srccnt[cntord[sn].sno].val, sr.rcol); |
333 |
> |
copycolor(scp->val, sr.rcol); |
334 |
> |
multcolor(scp->val, scp->coef); |
335 |
|
} |
336 |
|
/* add contribution if hit */ |
337 |
< |
addcolor(r->rcol, srccnt[cntord[sn].sno].val); |
338 |
< |
hit2 += hwt; |
339 |
< |
source[cntord[sn].sno].nhits++; |
337 |
> |
addcolor(r->rcol, scp->val); |
338 |
> |
nhits++; |
339 |
> |
source[scp->sno].nhits++; |
340 |
|
} |
341 |
< |
/* weighted hit rate */ |
342 |
< |
hwt = hit2 / test2; |
341 |
> |
/* source hit rate */ |
342 |
> |
if (hwt > FTINY) |
343 |
> |
hwt = (double)nhits / hwt; |
344 |
> |
else |
345 |
> |
hwt = 0.5; |
346 |
|
#ifdef DEBUG |
347 |
< |
{ |
348 |
< |
int ntested = sn; |
347 |
> |
sprintf(errmsg, "%d tested, %d untested, %f conditional hit rate\n", |
348 |
> |
sn, ncnts-sn, hwt); |
349 |
> |
eputs(errmsg); |
350 |
|
#endif |
351 |
|
/* add in untested sources */ |
352 |
< |
for ( ; sn < nsources; sn++) { |
353 |
< |
if (cntord[sn].brt <= 0.0) |
354 |
< |
break; |
355 |
< |
prob = hwt * (double)source[cntord[sn].sno].nhits / |
356 |
< |
(double)source[cntord[sn].sno].ntests; |
357 |
< |
scalecolor(srccnt[cntord[sn].sno].val, prob); |
358 |
< |
addcolor(r->rcol, srccnt[cntord[sn].sno].val); |
352 |
> |
for ( ; sn < ncnts; sn++) { |
353 |
> |
scp = srccnt + cntord[sn].sndx; |
354 |
> |
prob = hwt * (double)source[scp->sno].nhits / |
355 |
> |
(double)source[scp->sno].ntests; |
356 |
> |
if (prob > 1.0) |
357 |
> |
prob = 1.0; |
358 |
> |
scalecolor(scp->val, prob); |
359 |
> |
addcolor(r->rcol, scp->val); |
360 |
|
} |
390 |
– |
#ifdef DEBUG |
391 |
– |
fprintf(stderr, "%d tested, %d untested, %f hit rate\n", |
392 |
– |
ntested, sn-ntested, hwt); |
393 |
– |
} |
394 |
– |
#endif |
395 |
– |
|
396 |
– |
free(srccnt); |
397 |
– |
free(cntord); |
361 |
|
} |
362 |
|
|
363 |
|
|
364 |
< |
#define wrongsource(m, r) (m->otype!=MAT_ILLUM && \ |
365 |
< |
r->rsrc>=0 && \ |
366 |
< |
source[r->rsrc].so!=r->ro) |
364 |
> |
/**************************************************************** |
365 |
> |
* The following macros were separated from the m_light() routine |
366 |
> |
* because they are very nasty and difficult to understand. |
367 |
> |
*/ |
368 |
|
|
369 |
< |
#define badambient(m, r) ((r->crtype&(AMBIENT|SHADOW))==AMBIENT && \ |
370 |
< |
!(r->rtype&REFLECTED) && /* hack! */\ |
371 |
< |
!(m->otype==MAT_GLOW&&r->rot>m->oargs.farg[3])) |
369 |
> |
/* illumblock * |
370 |
> |
* |
371 |
> |
* We cannot allow an illum to pass to another illum, because that |
372 |
> |
* would almost certainly constitute overcounting. |
373 |
> |
* However, we do allow an illum to pass to another illum |
374 |
> |
* that is actually going to relay to a virtual light source. |
375 |
> |
* We also prevent an illum from passing to a glow; this provides a |
376 |
> |
* convenient mechanism for defining detailed light source |
377 |
> |
* geometry behind (or inside) an effective radiator. |
378 |
> |
*/ |
379 |
|
|
380 |
+ |
static int weaksrcmod(obj) int obj; /* efficiency booster function */ |
381 |
+ |
{register OBJREC *o = objptr(obj); |
382 |
+ |
return(o->otype==MAT_ILLUM|o->otype==MAT_GLOW);} |
383 |
+ |
|
384 |
+ |
#define illumblock(m, r) (!(source[r->rsrc].sflags&SVIRTUAL) && \ |
385 |
+ |
r->rod > 0.0 && \ |
386 |
+ |
weaksrcmod(source[r->rsrc].so->omod)) |
387 |
+ |
|
388 |
+ |
/* wrongsource * |
389 |
+ |
* |
390 |
+ |
* This source is the wrong source (ie. overcounted) if we are |
391 |
+ |
* aimed to a different source than the one we hit and the one |
392 |
+ |
* we hit is not an illum that should be passed. |
393 |
+ |
*/ |
394 |
+ |
|
395 |
+ |
#define wrongsource(m, r) (r->rsrc>=0 && source[r->rsrc].so!=r->ro && \ |
396 |
+ |
(m->otype!=MAT_ILLUM || illumblock(m,r))) |
397 |
+ |
|
398 |
+ |
/* distglow * |
399 |
+ |
* |
400 |
+ |
* A distant glow is an object that sometimes acts as a light source, |
401 |
+ |
* but is too far away from the test point to be one in this case. |
402 |
+ |
* (Glows with negative radii should NEVER participate in illumination.) |
403 |
+ |
*/ |
404 |
+ |
|
405 |
+ |
#define distglow(m, r) (m->otype==MAT_GLOW && \ |
406 |
+ |
m->oargs.farg[3] >= -FTINY && \ |
407 |
+ |
r->rot > m->oargs.farg[3]) |
408 |
+ |
|
409 |
+ |
/* badcomponent * |
410 |
+ |
* |
411 |
+ |
* We must avoid counting light sources in the ambient calculation, |
412 |
+ |
* since the direct component is handled separately. Therefore, any |
413 |
+ |
* ambient ray which hits an active light source must be discarded. |
414 |
+ |
* The same is true for stray specular samples, since the specular |
415 |
+ |
* contribution from light sources is calculated separately. |
416 |
+ |
*/ |
417 |
+ |
|
418 |
+ |
#define badcomponent(m, r) (r->crtype&(AMBIENT|SPECULAR) && \ |
419 |
+ |
!(r->crtype&SHADOW || r->rod < 0.0 || \ |
420 |
+ |
distglow(m, r))) |
421 |
+ |
|
422 |
+ |
/* passillum * |
423 |
+ |
* |
424 |
+ |
* An illum passes to another material type when we didn't hit it |
425 |
+ |
* on purpose (as part of a direct calculation), or it is relaying |
426 |
+ |
* a virtual light source. |
427 |
+ |
*/ |
428 |
+ |
|
429 |
|
#define passillum(m, r) (m->otype==MAT_ILLUM && \ |
430 |
< |
!(r->rsrc>=0&&source[r->rsrc].so==r->ro)) |
430 |
> |
(r->rsrc<0 || source[r->rsrc].so!=r->ro || \ |
431 |
> |
source[r->rsrc].sflags&SVIRTUAL)) |
432 |
|
|
433 |
+ |
/* srcignore * |
434 |
+ |
* |
435 |
+ |
* The -dv flag is normally on for sources to be visible. |
436 |
+ |
*/ |
437 |
|
|
438 |
+ |
#define srcignore(m, r) (!directvis && !(r->crtype&SHADOW) && \ |
439 |
+ |
!distglow(m, r)) |
440 |
+ |
|
441 |
+ |
|
442 |
|
m_light(m, r) /* ray hit a light source */ |
443 |
|
register OBJREC *m; |
444 |
|
register RAY *r; |
445 |
|
{ |
417 |
– |
/* check for behind */ |
418 |
– |
if (r->rod < 0.0) |
419 |
– |
return; |
446 |
|
/* check for over-counting */ |
447 |
< |
if (wrongsource(m, r) || badambient(m, r)) |
448 |
< |
return; |
447 |
> |
if (badcomponent(m, r)) |
448 |
> |
return(1); |
449 |
> |
if (wrongsource(m,r)) |
450 |
> |
return(1); |
451 |
|
/* check for passed illum */ |
452 |
|
if (passillum(m, r)) { |
453 |
< |
|
454 |
< |
if (m->oargs.nsargs < 1 || !strcmp(m->oargs.sarg[0], VOIDID)) |
455 |
< |
raytrans(r); |
456 |
< |
else |
457 |
< |
rayshade(r, modifier(m->oargs.sarg[0])); |
458 |
< |
|
459 |
< |
/* otherwise treat as source */ |
460 |
< |
} else { |
453 |
> |
if (m->oargs.nsargs && strcmp(m->oargs.sarg[0], VOIDID)) |
454 |
> |
return(rayshade(r, modifier(m->oargs.sarg[0]))); |
455 |
> |
raytrans(r); |
456 |
> |
return(1); |
457 |
> |
} |
458 |
> |
/* otherwise treat as source */ |
459 |
> |
/* check for behind */ |
460 |
> |
if (r->rod < 0.0) |
461 |
> |
return(1); |
462 |
> |
/* check for invisibility */ |
463 |
> |
if (srcignore(m, r)) |
464 |
> |
return(1); |
465 |
> |
/* check for outside spot */ |
466 |
> |
if (m->otype==MAT_SPOT && spotout(r, makespot(m), r->rot>=FHUGE)) |
467 |
> |
return(1); |
468 |
|
/* get distribution pattern */ |
469 |
< |
raytexture(r, m->omod); |
469 |
> |
raytexture(r, m->omod); |
470 |
|
/* get source color */ |
471 |
< |
setcolor(r->rcol, m->oargs.farg[0], |
472 |
< |
m->oargs.farg[1], |
473 |
< |
m->oargs.farg[2]); |
471 |
> |
setcolor(r->rcol, m->oargs.farg[0], |
472 |
> |
m->oargs.farg[1], |
473 |
> |
m->oargs.farg[2]); |
474 |
|
/* modify value */ |
475 |
< |
multcolor(r->rcol, r->pcol); |
476 |
< |
} |
475 |
> |
multcolor(r->rcol, r->pcol); |
476 |
> |
return(1); |
477 |
|
} |
443 |
– |
|
444 |
– |
|
445 |
– |
o_source() {} /* intersection with a source is done elsewhere */ |