1 |
< |
/* Copyright (c) 1986 Regents of the University of California */ |
1 |
> |
/* Copyright (c) 1990 Regents of the University of California */ |
2 |
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3 |
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#ifndef lint |
4 |
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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 |
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|
23 |
– |
#include "face.h" |
24 |
– |
|
21 |
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#include "random.h" |
22 |
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|
23 |
+ |
/* |
24 |
+ |
* Structures used by direct() |
25 |
+ |
*/ |
26 |
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|
27 |
< |
extern double dstrsrc; /* source distribution amount */ |
28 |
< |
extern double shadthresh; /* relative shadow threshold */ |
29 |
< |
extern double shadcert; /* shadow testing certainty */ |
27 |
> |
typedef struct { |
28 |
> |
FVECT dir; /* source direction */ |
29 |
> |
COLOR coef; /* material coefficient */ |
30 |
> |
COLOR val; /* contribution */ |
31 |
> |
} CONTRIB; /* direct contribution */ |
32 |
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|
33 |
< |
SRCREC *source = NULL; /* our list of sources */ |
34 |
< |
int nsources = 0; /* the number of sources */ |
33 |
> |
typedef struct { |
34 |
> |
int sno; /* source number */ |
35 |
> |
float brt; /* brightness (for comparison) */ |
36 |
> |
} CNTPTR; /* contribution pointer */ |
37 |
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|
38 |
+ |
static CONTRIB *srccnt; /* source contributions in direct() */ |
39 |
+ |
static CNTPTR *cntord; /* source ordering in direct() */ |
40 |
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|
41 |
+ |
|
42 |
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marksources() /* find and mark source objects */ |
43 |
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{ |
44 |
+ |
int i; |
45 |
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register OBJREC *o, *m; |
46 |
< |
register int i; |
47 |
< |
|
46 |
> |
register SRCREC *ns; |
47 |
> |
/* initialize dispatch table */ |
48 |
> |
initstypes(); |
49 |
> |
/* find direct sources */ |
50 |
|
for (i = 0; i < nobjects; i++) { |
51 |
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|
52 |
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o = objptr(i); |
53 |
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|
54 |
< |
if (o->omod == OVOID) |
54 |
> |
if (!issurface(o->otype) || o->omod == OVOID) |
55 |
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continue; |
56 |
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|
57 |
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m = objptr(o->omod); |
68 |
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m->oargs.farg[3] <= FTINY) |
69 |
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continue; /* don't bother */ |
70 |
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|
71 |
< |
if (source == NULL) |
72 |
< |
source = (SRCREC *)malloc(sizeof(SRCREC)); |
73 |
< |
else |
65 |
< |
source = (SRCREC *)realloc((char *)source, |
66 |
< |
(unsigned)(nsources+1)*sizeof(SRCREC)); |
67 |
< |
if (source == NULL) |
68 |
< |
error(SYSTEM, "out of memory in marksources"); |
71 |
> |
if (sfun[o->otype].of == NULL || |
72 |
> |
sfun[o->otype].of->setsrc == NULL) |
73 |
> |
objerror(o, USER, "illegal material"); |
74 |
|
|
75 |
< |
newsource(&source[nsources], o); |
75 |
> |
if ((ns = newsource()) == NULL) |
76 |
> |
goto memerr; |
77 |
|
|
78 |
+ |
(*sfun[o->otype].of->setsrc)(ns, o); |
79 |
+ |
|
80 |
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if (m->otype == MAT_GLOW) { |
81 |
< |
source[nsources].sflags |= SPROX; |
82 |
< |
source[nsources].sl.prox = m->oargs.farg[3]; |
81 |
> |
ns->sflags |= SPROX; |
82 |
> |
ns->sl.prox = m->oargs.farg[3]; |
83 |
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if (o->otype == OBJ_SOURCE) |
84 |
< |
source[nsources].sflags |= SSKIP; |
84 |
> |
ns->sflags |= SSKIP; |
85 |
|
} else if (m->otype == MAT_SPOT) { |
86 |
< |
source[nsources].sflags |= SSPOT; |
87 |
< |
source[nsources].sl.s = makespot(m); |
86 |
> |
ns->sflags |= SSPOT; |
87 |
> |
if ((ns->sl.s = makespot(m)) == NULL) |
88 |
> |
goto memerr; |
89 |
|
} |
81 |
– |
nsources++; |
90 |
|
} |
91 |
< |
} |
92 |
< |
|
93 |
< |
|
86 |
< |
newsource(src, so) /* add a source to the array */ |
87 |
< |
register SRCREC *src; |
88 |
< |
register OBJREC *so; |
89 |
< |
{ |
90 |
< |
double cos(), tan(), sqrt(); |
91 |
< |
double theta; |
92 |
< |
FACE *f; |
93 |
< |
CONE *co; |
94 |
< |
int j; |
95 |
< |
register int i; |
96 |
< |
|
97 |
< |
src->sflags = 0; |
98 |
< |
src->nhits = 1; src->ntests = 2; /* start probability = 1/2 */ |
99 |
< |
src->so = so; |
100 |
< |
|
101 |
< |
switch (so->otype) { |
102 |
< |
case OBJ_SOURCE: |
103 |
< |
if (so->oargs.nfargs != 4) |
104 |
< |
objerror(so, USER, "bad arguments"); |
105 |
< |
src->sflags |= SDISTANT; |
106 |
< |
VCOPY(src->sloc, so->oargs.farg); |
107 |
< |
if (normalize(src->sloc) == 0.0) |
108 |
< |
objerror(so, USER, "zero direction"); |
109 |
< |
theta = PI/180.0/2.0 * so->oargs.farg[3]; |
110 |
< |
if (theta <= FTINY) |
111 |
< |
objerror(so, USER, "zero size"); |
112 |
< |
src->ss = theta >= PI/4 ? 1.0 : tan(theta); |
113 |
< |
src->ss2 = 2.0*PI * (1.0 - cos(theta)); |
114 |
< |
break; |
115 |
< |
case OBJ_SPHERE: |
116 |
< |
VCOPY(src->sloc, so->oargs.farg); |
117 |
< |
src->ss = so->oargs.farg[3]; |
118 |
< |
src->ss2 = PI * src->ss * src->ss; |
119 |
< |
break; |
120 |
< |
case OBJ_FACE: |
121 |
< |
/* get the face */ |
122 |
< |
f = getface(so); |
123 |
< |
/* find the center */ |
124 |
< |
for (j = 0; j < 3; j++) { |
125 |
< |
src->sloc[j] = 0.0; |
126 |
< |
for (i = 0; i < f->nv; i++) |
127 |
< |
src->sloc[j] += VERTEX(f,i)[j]; |
128 |
< |
src->sloc[j] /= f->nv; |
129 |
< |
} |
130 |
< |
if (!inface(src->sloc, f)) |
131 |
< |
objerror(so, USER, "cannot hit center"); |
132 |
< |
src->ss = sqrt(f->area / PI); |
133 |
< |
src->ss2 = f->area; |
134 |
< |
break; |
135 |
< |
case OBJ_RING: |
136 |
< |
/* get the ring */ |
137 |
< |
co = getcone(so, 0); |
138 |
< |
VCOPY(src->sloc, CO_P0(co)); |
139 |
< |
if (CO_R0(co) > 0.0) |
140 |
< |
objerror(so, USER, "cannot hit center"); |
141 |
< |
src->ss = CO_R1(co); |
142 |
< |
src->ss2 = PI * src->ss * src->ss; |
143 |
< |
break; |
144 |
< |
default: |
145 |
< |
objerror(so, USER, "illegal material"); |
91 |
> |
if (nsources <= 0) { |
92 |
> |
error(WARNING, "no light sources found"); |
93 |
> |
return; |
94 |
|
} |
95 |
+ |
markvirtuals(); /* find and add virtual sources */ |
96 |
+ |
srccnt = (CONTRIB *)malloc(nsources*sizeof(CONTRIB)); |
97 |
+ |
cntord = (CNTPTR *)malloc(nsources*sizeof(CNTPTR)); |
98 |
+ |
if (srccnt != NULL && cntord != NULL) |
99 |
+ |
goto memerr; |
100 |
+ |
return; |
101 |
+ |
memerr: |
102 |
+ |
error(SYSTEM, "out of memory in marksources"); |
103 |
|
} |
104 |
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|
105 |
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|
150 |
– |
SPOT * |
151 |
– |
makespot(m) /* make a spotlight */ |
152 |
– |
register OBJREC *m; |
153 |
– |
{ |
154 |
– |
extern double cos(); |
155 |
– |
register SPOT *ns; |
156 |
– |
|
157 |
– |
if ((ns = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
158 |
– |
error(SYSTEM, "out of memory in makespot"); |
159 |
– |
ns->siz = 2.0*PI * (1.0 - cos(PI/180.0/2.0 * m->oargs.farg[3])); |
160 |
– |
VCOPY(ns->aim, m->oargs.farg+4); |
161 |
– |
if ((ns->flen = normalize(ns->aim)) == 0.0) |
162 |
– |
objerror(m, USER, "zero focus vector"); |
163 |
– |
return(ns); |
164 |
– |
} |
165 |
– |
|
166 |
– |
|
106 |
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double |
107 |
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srcray(sr, r, sn) /* send a ray to a source, return domega */ |
108 |
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register RAY *sr; /* returned source ray */ |
109 |
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RAY *r; /* ray which hit object */ |
110 |
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register int sn; /* source number */ |
111 |
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{ |
173 |
– |
register double *norm = NULL; /* plane normal */ |
112 |
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double ddot; /* (distance times) cosine */ |
113 |
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FVECT vd; |
114 |
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double d; |
121 |
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|
122 |
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sr->rsrc = sn; /* remember source */ |
123 |
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/* get source direction */ |
124 |
< |
if (source[sn].sflags & SDISTANT) |
124 |
> |
if (source[sn].sflags & SDISTANT) { |
125 |
> |
if (source[sn].sflags & SSPOT) { /* check location */ |
126 |
> |
for (i = 0; i < 3; i++) |
127 |
> |
vd[i] = sr->rorg[i] - source[sn].sl.s->aim[i]; |
128 |
> |
d = DOT(source[sn].sloc,vd); |
129 |
> |
d = DOT(vd,vd) - d*d; |
130 |
> |
if (PI*d > source[sn].sl.s->siz) |
131 |
> |
return(0.0); |
132 |
> |
} |
133 |
|
/* constant direction */ |
134 |
|
VCOPY(sr->rdir, source[sn].sloc); |
135 |
< |
else { /* compute direction */ |
135 |
> |
} else { /* compute direction */ |
136 |
|
for (i = 0; i < 3; i++) |
137 |
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sr->rdir[i] = source[sn].sloc[i] - sr->rorg[i]; |
138 |
|
|
139 |
< |
if (source[sn].so->otype == OBJ_FACE) |
140 |
< |
norm = getface(source[sn].so)->norm; |
195 |
< |
else if (source[sn].so->otype == OBJ_RING) |
196 |
< |
norm = getcone(source[sn].so,0)->ad; |
197 |
< |
|
198 |
< |
if (norm != NULL && (ddot = -DOT(sr->rdir, norm)) <= FTINY) |
139 |
> |
if (source[sn].sflags & SFLAT && |
140 |
> |
(ddot = -DOT(sr->rdir, source[sn].snorm)) <= FTINY) |
141 |
|
return(0.0); /* behind surface! */ |
142 |
|
} |
143 |
|
if (dstrsrc > FTINY) { |
144 |
|
/* distribute source direction */ |
145 |
< |
for (i = 0; i < 3; i++) |
146 |
< |
vd[i] = dstrsrc * source[sn].ss * (1.0 - 2.0*frandom()); |
147 |
< |
|
148 |
< |
if (norm != NULL) { /* project offset */ |
149 |
< |
d = DOT(vd, norm); |
145 |
> |
dimlist[ndims++] = sn; |
146 |
> |
for (i = 0; i < 3; i++) { |
147 |
> |
dimlist[ndims] = i + 8831; |
148 |
> |
vd[i] = dstrsrc * source[sn].ss * |
149 |
> |
(1.0 - 2.0*urand(ilhash(dimlist,ndims+1)+samplendx)); |
150 |
> |
} |
151 |
> |
ndims--; |
152 |
> |
if (source[sn].sflags & SFLAT) { /* project offset */ |
153 |
> |
d = DOT(vd, source[sn].snorm); |
154 |
|
for (i = 0; i < 3; i++) |
155 |
< |
vd[i] -= d * norm[i]; |
155 |
> |
vd[i] -= d * source[sn].snorm[i]; |
156 |
|
} |
157 |
|
for (i = 0; i < 3; i++) /* offset source direction */ |
158 |
|
sr->rdir[i] += vd[i]; |
169 |
|
/* domega constant */ |
170 |
|
return(source[sn].ss2); |
171 |
|
|
226 |
– |
else { |
172 |
|
/* check proximity */ |
173 |
< |
if (source[sn].sflags & SPROX && |
174 |
< |
d > source[sn].sl.prox) |
175 |
< |
return(0.0); |
176 |
< |
|
177 |
< |
if (norm != NULL) |
178 |
< |
ddot /= d; |
179 |
< |
else |
180 |
< |
ddot = 1.0; |
173 |
> |
if (source[sn].sflags & SPROX && |
174 |
> |
d > source[sn].sl.prox) |
175 |
> |
return(0.0); |
176 |
> |
/* compute dot product */ |
177 |
> |
if (source[sn].sflags & SFLAT) |
178 |
> |
ddot /= d; |
179 |
> |
else |
180 |
> |
ddot = 1.0; |
181 |
|
/* check angle */ |
182 |
< |
if (source[sn].sflags & SSPOT) { |
183 |
< |
if (source[sn].sl.s->siz < 2.0*PI * |
182 |
> |
if (source[sn].sflags & SSPOT) { |
183 |
> |
if (source[sn].sl.s->siz < 2.0*PI * |
184 |
|
(1.0 + DOT(source[sn].sl.s->aim,sr->rdir))) |
185 |
< |
return(0.0); |
186 |
< |
d += source[sn].sl.s->flen; |
242 |
< |
} |
243 |
< |
/* return domega */ |
244 |
< |
return(ddot*source[sn].ss2/(d*d)); |
185 |
> |
return(0.0); |
186 |
> |
d += source[sn].sl.s->flen; /* adjust length */ |
187 |
|
} |
188 |
+ |
/* compute domega */ |
189 |
+ |
return(ddot*source[sn].ss2/(d*d)); |
190 |
|
} |
191 |
|
|
192 |
|
|
193 |
< |
sourcehit(r) /* check to see if ray hit distant source */ |
194 |
< |
register RAY *r; |
193 |
> |
srcvalue(r) /* punch ray to source and compute value */ |
194 |
> |
RAY *r; |
195 |
|
{ |
196 |
< |
int first, last; |
253 |
< |
register int i; |
196 |
> |
register SRCREC *sp; |
197 |
|
|
198 |
< |
if (r->rsrc >= 0) { /* check only one if aimed */ |
199 |
< |
first = last = r->rsrc; |
200 |
< |
} else { /* otherwise check all */ |
201 |
< |
first = 0; last = nsources-1; |
198 |
> |
sp = &source[r->rsrc]; |
199 |
> |
if (sp->sflags & SVIRTUAL) { /* virtual source */ |
200 |
> |
/* check intersection */ |
201 |
> |
if (!(*ofun[sp->so->otype].funp)(sp->so, r)) |
202 |
> |
return; |
203 |
> |
raycont(r); /* compute contribution */ |
204 |
> |
return; |
205 |
|
} |
206 |
< |
for (i = first; i <= last; i++) |
207 |
< |
if (source[i].sflags & SDISTANT) |
208 |
< |
/* |
209 |
< |
* Check to see if ray is within |
210 |
< |
* solid angle of source. |
211 |
< |
*/ |
212 |
< |
if (2.0*PI * (1.0 - DOT(source[i].sloc,r->rdir)) |
267 |
< |
<= source[i].ss2) { |
268 |
< |
r->ro = source[i].so; |
269 |
< |
if (!(source[i].sflags & SSKIP)) |
270 |
< |
break; |
271 |
< |
} |
272 |
< |
|
273 |
< |
if (r->ro != NULL) { |
274 |
< |
for (i = 0; i < 3; i++) |
275 |
< |
r->ron[i] = -r->rdir[i]; |
276 |
< |
r->rod = 1.0; |
277 |
< |
r->rofs = 1.0; setident4(r->rofx); |
278 |
< |
r->robs = 1.0; setident4(r->robx); |
279 |
< |
return(1); |
206 |
> |
/* compute intersection */ |
207 |
> |
if (sp->sflags & SDISTANT ? sourcehit(r) : |
208 |
> |
(*ofun[sp->so->otype].funp)(sp->so, r)) { |
209 |
> |
if (sp->sa.success >= 0) |
210 |
> |
sp->sa.success++; |
211 |
> |
raycont(r); /* compute contribution */ |
212 |
> |
return; |
213 |
|
} |
214 |
< |
return(0); |
214 |
> |
if (sp->sa.success < 0) |
215 |
> |
return; /* bitched already */ |
216 |
> |
sp->sa.success -= AIMREQT; |
217 |
> |
if (sp->sa.success >= 0) |
218 |
> |
return; /* leniency */ |
219 |
> |
sprintf(errmsg, "aiming failure for light source \"%s\"", |
220 |
> |
sp->so->oname); |
221 |
> |
error(WARNING, errmsg); /* issue warning */ |
222 |
|
} |
223 |
|
|
224 |
|
|
241 |
|
{ |
242 |
|
extern double pow(); |
243 |
|
register int sn; |
304 |
– |
register CONTRIB *srccnt; |
305 |
– |
register CNTPTR *cntord; |
244 |
|
int nshadcheck, ncnts; |
245 |
< |
double prob, ourthresh, hwt, test2, hit2; |
245 |
> |
int nhits; |
246 |
> |
double dom, prob, ourthresh, hwt; |
247 |
|
RAY sr; |
248 |
< |
|
248 |
> |
/* NOTE: srccnt and cntord global so no recursion */ |
249 |
|
if (nsources <= 0) |
250 |
< |
return; |
312 |
< |
srccnt = (CONTRIB *)malloc(nsources*sizeof(CONTRIB)); |
313 |
< |
cntord = (CNTPTR *)malloc(nsources*sizeof(CNTPTR)); |
314 |
< |
if (srccnt == NULL || cntord == NULL) |
315 |
< |
error(SYSTEM, "out of memory in direct"); |
250 |
> |
return; /* no sources?! */ |
251 |
|
/* compute number to check */ |
252 |
|
nshadcheck = pow((double)nsources, shadcert) + .5; |
253 |
|
/* modify threshold */ |
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) |
260 |
> |
if ((dom = srcray(&sr, r, sn)) == 0.0) |
261 |
|
continue; |
262 |
|
VCOPY(srccnt[sn].dir, sr.rdir); |
263 |
|
/* compute coefficient */ |
264 |
< |
(*f)(srccnt[sn].val, p, srccnt[sn].dir, srccnt[sn].dom); |
265 |
< |
cntord[sn].brt = bright(srccnt[sn].val); |
264 |
> |
(*f)(srccnt[sn].coef, p, srccnt[sn].dir, dom); |
265 |
> |
cntord[sn].brt = bright(srccnt[sn].coef); |
266 |
|
if (cntord[sn].brt <= 0.0) |
267 |
|
continue; |
268 |
< |
/* compute intersection */ |
269 |
< |
if (!( source[sn].sflags & SDISTANT ? |
270 |
< |
sourcehit(&sr) : |
271 |
< |
(*ofun[source[sn].so->otype].funp) |
272 |
< |
(source[sn].so, &sr) )) |
338 |
< |
continue; |
339 |
< |
/* compute contribution */ |
340 |
< |
raycont(&sr); |
341 |
< |
multcolor(srccnt[sn].val, sr.rcol); |
268 |
> |
/* compute potential */ |
269 |
> |
sr.revf = srcvalue; |
270 |
> |
rayvalue(&sr); |
271 |
> |
copycolor(srccnt[sn].val, sr.rcol); |
272 |
> |
multcolor(srccnt[sn].val, srccnt[sn].coef); |
273 |
|
cntord[sn].brt = bright(srccnt[sn].val); |
274 |
|
} |
275 |
|
/* sort contributions */ |
289 |
|
/* accumulate tail */ |
290 |
|
for (sn = ncnts-1; sn > 0; sn--) |
291 |
|
cntord[sn-1].brt += cntord[sn].brt; |
361 |
– |
/* start with prob=.5 */ |
362 |
– |
hit2 = 0.5; test2 = 1.0; |
292 |
|
/* test for shadows */ |
293 |
+ |
nhits = 0; |
294 |
|
for (sn = 0; sn < ncnts; sn++) { |
295 |
|
/* check threshold */ |
296 |
|
if ((sn+nshadcheck>=ncnts ? cntord[sn].brt : |
297 |
< |
cntord[sn].brt-cntord[sn+nshadcheck].brt) < |
298 |
< |
ourthresh*bright(r->rcol)) |
297 |
> |
cntord[sn].brt-cntord[sn+nshadcheck].brt) |
298 |
> |
< ourthresh*bright(r->rcol)) |
299 |
|
break; |
300 |
|
/* get statistics */ |
371 |
– |
hwt = (double)source[cntord[sn].sno].nhits / |
372 |
– |
(double)source[cntord[sn].sno].ntests; |
373 |
– |
test2 += hwt; |
301 |
|
source[cntord[sn].sno].ntests++; |
302 |
|
/* test for hit */ |
303 |
|
rayorigin(&sr, r, SHADOW, 1.0); |
304 |
|
VCOPY(sr.rdir, srccnt[cntord[sn].sno].dir); |
305 |
|
sr.rsrc = cntord[sn].sno; |
306 |
|
if (localhit(&sr, &thescene) && |
307 |
< |
sr.ro != source[cntord[sn].sno].so) { |
308 |
< |
/* check for transmission */ |
307 |
> |
( sr.ro != source[cntord[sn].sno].so || |
308 |
> |
source[cntord[sn].sno].sflags & SFOLLOW )) { |
309 |
> |
/* follow entire path */ |
310 |
|
raycont(&sr); |
311 |
|
if (bright(sr.rcol) <= FTINY) |
312 |
|
continue; /* missed! */ |
313 |
< |
(*f)(srccnt[cntord[sn].sno].val, p, |
314 |
< |
srccnt[cntord[sn].sno].dir, |
315 |
< |
srccnt[cntord[sn].sno].dom); |
388 |
< |
multcolor(srccnt[cntord[sn].sno].val, sr.rcol); |
313 |
> |
copycolor(srccnt[cntord[sn].sno].val, sr.rcol); |
314 |
> |
multcolor(srccnt[cntord[sn].sno].val, |
315 |
> |
srccnt[cntord[sn].sno].coef); |
316 |
|
} |
317 |
|
/* add contribution if hit */ |
318 |
|
addcolor(r->rcol, srccnt[cntord[sn].sno].val); |
319 |
< |
hit2 += hwt; |
319 |
> |
nhits++; |
320 |
|
source[cntord[sn].sno].nhits++; |
321 |
|
} |
322 |
< |
/* weighted hit rate */ |
323 |
< |
hwt = hit2 / test2; |
322 |
> |
/* surface hit rate */ |
323 |
> |
if (sn > 0) |
324 |
> |
hwt = (double)nhits / (double)sn; |
325 |
> |
else |
326 |
> |
hwt = 0.5; |
327 |
|
#ifdef DEBUG |
328 |
|
sprintf(errmsg, "%d tested, %d untested, %f hit rate\n", |
329 |
|
sn, ncnts-sn, hwt); |
335 |
|
(double)source[cntord[sn].sno].ntests; |
336 |
|
scalecolor(srccnt[cntord[sn].sno].val, prob); |
337 |
|
addcolor(r->rcol, srccnt[cntord[sn].sno].val); |
408 |
– |
} |
409 |
– |
|
410 |
– |
free((char *)srccnt); |
411 |
– |
free((char *)cntord); |
412 |
– |
} |
413 |
– |
|
414 |
– |
|
415 |
– |
#define wrongsource(m, r) (m->otype!=MAT_ILLUM && \ |
416 |
– |
r->rsrc>=0 && \ |
417 |
– |
source[r->rsrc].so!=r->ro) |
418 |
– |
|
419 |
– |
#define badambient(m, r) ((r->crtype&(AMBIENT|SHADOW))==AMBIENT && \ |
420 |
– |
!(r->rtype&REFLECTED) && /* hack! */\ |
421 |
– |
!(m->otype==MAT_GLOW&&r->rot>m->oargs.farg[3])) |
422 |
– |
|
423 |
– |
#define passillum(m, r) (m->otype==MAT_ILLUM && \ |
424 |
– |
!(r->rsrc>=0&&source[r->rsrc].so==r->ro)) |
425 |
– |
|
426 |
– |
|
427 |
– |
m_light(m, r) /* ray hit a light source */ |
428 |
– |
register OBJREC *m; |
429 |
– |
register RAY *r; |
430 |
– |
{ |
431 |
– |
/* check for over-counting */ |
432 |
– |
if (wrongsource(m, r) || badambient(m, r)) |
433 |
– |
return; |
434 |
– |
/* check for passed illum */ |
435 |
– |
if (passillum(m, r)) { |
436 |
– |
|
437 |
– |
if (m->oargs.nsargs < 1 || !strcmp(m->oargs.sarg[0], VOIDID)) |
438 |
– |
raytrans(r); |
439 |
– |
else |
440 |
– |
rayshade(r, modifier(m->oargs.sarg[0])); |
441 |
– |
|
442 |
– |
/* otherwise treat as source */ |
443 |
– |
} else { |
444 |
– |
/* check for behind */ |
445 |
– |
if (r->rod < 0.0) |
446 |
– |
return; |
447 |
– |
/* get distribution pattern */ |
448 |
– |
raytexture(r, m->omod); |
449 |
– |
/* get source color */ |
450 |
– |
setcolor(r->rcol, m->oargs.farg[0], |
451 |
– |
m->oargs.farg[1], |
452 |
– |
m->oargs.farg[2]); |
453 |
– |
/* modify value */ |
454 |
– |
multcolor(r->rcol, r->pcol); |
455 |
– |
/* assign distance */ |
456 |
– |
r->rt = r->rot; |
338 |
|
} |
339 |
|
} |