11 |
|
|
12 |
|
#include "ray.h" |
13 |
|
|
14 |
< |
#include "source.h" |
14 |
> |
#include "octree.h" |
15 |
|
|
16 |
|
#include "otypes.h" |
17 |
|
|
18 |
< |
#include "cone.h" |
18 |
> |
#include "source.h" |
19 |
|
|
20 |
< |
#include "face.h" |
20 |
> |
#include "random.h" |
21 |
|
|
22 |
– |
extern int directrelay; /* maximum number of source relays */ |
22 |
|
|
23 |
< |
double getplaneq(); |
25 |
< |
double getmaxdisk(); |
26 |
< |
double intercircle(); |
27 |
< |
SRCREC *makevsrc(); |
23 |
> |
#define DISKTFRAC 0.25 /* disk area pretest fraction */ |
24 |
|
|
25 |
+ |
double getdisk(); |
26 |
+ |
|
27 |
|
static OBJECT *vobject; /* virtual source objects */ |
28 |
|
static int nvobjects = 0; /* number of virtual source objects */ |
29 |
|
|
38 |
|
/* find virtual source objects */ |
39 |
|
for (i = 0; i < nobjects; i++) { |
40 |
|
o = objptr(i); |
41 |
< |
if (o->omod == OVOID) |
41 |
> |
if (!issurface(o->otype) || o->omod == OVOID) |
42 |
|
continue; |
43 |
|
if (!isvlight(objptr(o->omod)->otype)) |
44 |
|
continue; |
45 |
+ |
if (sfun[o->otype].of == NULL || |
46 |
+ |
sfun[o->otype].of->getpleq == NULL) |
47 |
+ |
objerror(o, USER, "illegal material"); |
48 |
|
if (nvobjects == 0) |
49 |
|
vobject = (OBJECT *)malloc(sizeof(OBJECT)); |
50 |
|
else |
56 |
|
} |
57 |
|
if (nvobjects == 0) |
58 |
|
return; |
59 |
+ |
#ifdef DEBUG |
60 |
+ |
fprintf(stderr, "found %d virtual source objects\n", nvobjects); |
61 |
+ |
#endif |
62 |
|
/* append virtual sources */ |
63 |
|
for (i = nsources; i-- > 0; ) |
64 |
< |
if (!(source[i].sflags & SSKIP)) |
61 |
< |
addvirtuals(&source[i], directrelay); |
64 |
> |
addvirtuals(i, directrelay); |
65 |
|
/* done with our object list */ |
66 |
|
free((char *)vobject); |
67 |
|
nvobjects = 0; |
68 |
|
} |
69 |
|
|
70 |
|
|
71 |
< |
addvirtuals(sr, nr) /* add virtual sources associated with sr */ |
72 |
< |
SRCREC *sr; |
71 |
> |
addvirtuals(sn, nr) /* add virtuals associated with source */ |
72 |
> |
int sn; |
73 |
|
int nr; |
74 |
|
{ |
75 |
|
register int i; |
76 |
|
/* check relay limit first */ |
77 |
|
if (nr <= 0) |
78 |
|
return; |
79 |
+ |
if (source[sn].sflags & SSKIP) |
80 |
+ |
return; |
81 |
|
/* check each virtual object for projection */ |
82 |
|
for (i = 0; i < nvobjects; i++) |
83 |
< |
vproject(objptr(i), sr, nr-1); /* calls us recursively */ |
83 |
> |
/* vproject() calls us recursively */ |
84 |
> |
vproject(objptr(vobject[i]), sn, nr-1); |
85 |
|
} |
86 |
|
|
87 |
|
|
88 |
< |
SRCREC * |
89 |
< |
makevsrc(op, sp, pm) /* make virtual source if reasonable */ |
88 |
> |
vproject(o, sn, n) /* create projected source(s) if they exist */ |
89 |
> |
OBJREC *o; |
90 |
> |
int sn; |
91 |
> |
int n; |
92 |
> |
{ |
93 |
> |
register int i; |
94 |
> |
register VSMATERIAL *vsmat; |
95 |
> |
MAT4 proj; |
96 |
> |
int ns; |
97 |
> |
|
98 |
> |
if (o == source[sn].so) /* objects cannot project themselves */ |
99 |
> |
return; |
100 |
> |
/* get virtual source material */ |
101 |
> |
vsmat = sfun[objptr(o->omod)->otype].mf; |
102 |
> |
/* project virtual sources */ |
103 |
> |
for (i = 0; i < vsmat->nproj; i++) |
104 |
> |
if ((*vsmat->vproj)(proj, o, &source[sn], i)) |
105 |
> |
if ((ns = makevsrc(o, sn, proj)) >= 0) { |
106 |
> |
#ifdef DEBUG |
107 |
> |
virtverb(ns, stderr); |
108 |
> |
#endif |
109 |
> |
addvirtuals(ns, n); |
110 |
> |
} |
111 |
> |
} |
112 |
> |
|
113 |
> |
|
114 |
> |
int |
115 |
> |
makevsrc(op, sn, pm) /* make virtual source if reasonable */ |
116 |
|
OBJREC *op; |
117 |
< |
register SRCREC *sp; |
117 |
> |
register int sn; |
118 |
|
MAT4 pm; |
119 |
|
{ |
120 |
< |
register SRCREC *newsrc; |
89 |
< |
FVECT nsloc, ocent, nsnorm; |
120 |
> |
FVECT nsloc, nsnorm, ocent; |
121 |
|
double maxrad2; |
122 |
< |
double d1, d2; |
122 |
> |
int nsflags; |
123 |
> |
double d1; |
124 |
|
SPOT theirspot, ourspot; |
125 |
|
register int i; |
126 |
+ |
|
127 |
+ |
nsflags = source[sn].sflags | (SVIRTUAL|SSPOT|SFOLLOW); |
128 |
|
/* get object center and max. radius */ |
129 |
< |
maxrad2 = getmaxdisk(ocent, op); |
129 |
> |
maxrad2 = getdisk(ocent, op, sn); |
130 |
|
if (maxrad2 <= FTINY) /* too small? */ |
131 |
< |
return(NULL); |
131 |
> |
return(-1); |
132 |
|
/* get location and spot */ |
133 |
< |
if (sp->sflags & SDISTANT) { /* distant source */ |
134 |
< |
if (sp->sflags & SPROX) |
135 |
< |
return(NULL); /* should never get here! */ |
136 |
< |
multv3(nsloc, sp->sloc, pm); |
133 |
> |
if (source[sn].sflags & SDISTANT) { /* distant source */ |
134 |
> |
if (source[sn].sflags & SPROX) |
135 |
> |
return(-1); /* should never get here! */ |
136 |
> |
multv3(nsloc, source[sn].sloc, pm); |
137 |
|
VCOPY(ourspot.aim, ocent); |
138 |
|
ourspot.siz = PI*maxrad2; |
139 |
|
ourspot.flen = 0.; |
140 |
< |
if (sp->sflags & SSPOT) { |
141 |
< |
copystruct(&theirspot, sp->sl.s); |
142 |
< |
multp3(theirspot.aim, sp->sl.s->aim, pm); |
140 |
> |
if (source[sn].sflags & SSPOT) { |
141 |
> |
copystruct(&theirspot, source[sn].sl.s); |
142 |
> |
multp3(theirspot.aim, source[sn].sl.s->aim, pm); |
143 |
|
if (!commonbeam(&ourspot, &theirspot, nsloc)) |
144 |
< |
return(NULL); /* no overlap */ |
144 |
> |
return(-1); /* no overlap */ |
145 |
|
} |
146 |
|
} else { /* local source */ |
147 |
< |
multp3(nsloc, sp->sloc, pm); |
114 |
< |
if (sp->sflags & SPROX) { |
115 |
< |
d2 = 0.; |
116 |
< |
for (i = 0; i < 3; i++) { |
117 |
< |
d1 = ocent[i] - nsloc[i]; |
118 |
< |
d2 += d1*d1; |
119 |
< |
} |
120 |
< |
if (d2 > sp->sl.prox*sp->sl.prox) |
121 |
< |
return(NULL); /* too far away */ |
122 |
< |
} |
147 |
> |
multp3(nsloc, source[sn].sloc, pm); |
148 |
|
for (i = 0; i < 3; i++) |
149 |
|
ourspot.aim[i] = ocent[i] - nsloc[i]; |
150 |
|
if ((d1 = normalize(ourspot.aim)) == 0.) |
151 |
< |
return(NULL); /* at source!! */ |
151 |
> |
return(-1); /* at source!! */ |
152 |
> |
if (source[sn].sflags & SPROX && d1 > source[sn].sl.prox) |
153 |
> |
return(-1); /* too far away */ |
154 |
|
ourspot.siz = 2.*PI*(1. - d1/sqrt(d1*d1+maxrad2)); |
155 |
|
ourspot.flen = 0.; |
156 |
< |
if (sp->sflags & SSPOT) { |
157 |
< |
copystruct(&theirspot, sp->sl.s); |
158 |
< |
multv3(theirspot.aim, sp->sl.s->aim, pm); |
156 |
> |
if (source[sn].sflags & SSPOT) { |
157 |
> |
copystruct(&theirspot, source[sn].sl.s); |
158 |
> |
multv3(theirspot.aim, source[sn].sl.s->aim, pm); |
159 |
|
if (!commonspot(&ourspot, &theirspot, nsloc)) |
160 |
< |
return(NULL); /* no overlap */ |
160 |
> |
return(-1); /* no overlap */ |
161 |
|
ourspot.flen = theirspot.flen; |
162 |
|
} |
163 |
< |
if (sp->sflags & SFLAT) { /* check for behind source */ |
164 |
< |
multv3(nsnorm, sp->snorm, pm); |
163 |
> |
if (source[sn].sflags & SFLAT) { /* behind source? */ |
164 |
> |
multv3(nsnorm, source[sn].snorm, pm); |
165 |
|
if (checkspot(&ourspot, nsnorm) < 0) |
166 |
< |
return(NULL); |
166 |
> |
return(-1); |
167 |
|
} |
168 |
|
} |
169 |
< |
/* everything is OK, make source */ |
170 |
< |
if ((newsrc = newsource()) == NULL) |
169 |
> |
/* pretest visibility */ |
170 |
> |
nsflags = vstestvis(nsflags, op, ocent, maxrad2, sn); |
171 |
> |
if (nsflags & SSKIP) |
172 |
> |
return(-1); /* obstructed */ |
173 |
> |
/* it all checks out, so make it */ |
174 |
> |
if ((i = newsource()) < 0) |
175 |
|
goto memerr; |
176 |
< |
newsrc->sflags = sp->sflags | (SVIRTUAL|SSPOT|SFOLLOW); |
177 |
< |
VCOPY(newsrc->sloc, nsloc); |
178 |
< |
if (newsrc->sflags & SFLAT) |
179 |
< |
VCOPY(newsrc->snorm, nsnorm); |
180 |
< |
newsrc->ss = sp->ss; newsrc->ss2 = sp->ss2; |
181 |
< |
if ((newsrc->sl.s = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
176 |
> |
source[i].sflags = nsflags; |
177 |
> |
VCOPY(source[i].sloc, nsloc); |
178 |
> |
if (nsflags & SFLAT) |
179 |
> |
VCOPY(source[i].snorm, nsnorm); |
180 |
> |
source[i].ss = source[sn].ss; source[i].ss2 = source[sn].ss2; |
181 |
> |
if ((source[i].sl.s = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
182 |
|
goto memerr; |
183 |
< |
copystruct(newsrc->sl.s, &ourspot); |
184 |
< |
if (newsrc->sflags & SPROX) |
185 |
< |
newsrc->sl.prox = sp->sl.prox; |
186 |
< |
newsrc->sa.svnext = sp - source; |
187 |
< |
return(newsrc); |
183 |
> |
copystruct(source[i].sl.s, &ourspot); |
184 |
> |
if (nsflags & SPROX) |
185 |
> |
source[i].sl.prox = source[sn].sl.prox; |
186 |
> |
source[i].sa.svnext = sn; |
187 |
> |
source[i].so = op; |
188 |
> |
return(i); |
189 |
|
memerr: |
190 |
|
error(SYSTEM, "out of memory in makevsrc"); |
191 |
|
} |
192 |
|
|
193 |
|
|
162 |
– |
commonspot(sp1, sp2, org) /* set sp1 to intersection of sp1 and sp2 */ |
163 |
– |
register SPOT *sp1, *sp2; |
164 |
– |
FVECT org; |
165 |
– |
{ |
166 |
– |
FVECT cent; |
167 |
– |
double rad2, d1r2, d2r2; |
168 |
– |
|
169 |
– |
d1r2 = 1. - sp1->siz/(2.*PI); |
170 |
– |
d2r2 = 1. - sp2->siz/(2.*PI); |
171 |
– |
if (sp2->siz >= 2.*PI-FTINY) /* BIG, just check overlap */ |
172 |
– |
return(DOT(sp1->aim,sp2->aim) >= d1r2*d2r2 - |
173 |
– |
sqrt((1.-d1r2*d1r2)*(1.-d2r2*d2r2))); |
174 |
– |
/* compute and check disks */ |
175 |
– |
d1r2 = 1./(d1r2*d1r2) - 1.; |
176 |
– |
d2r2 = 1./(d2r2*d2r2) - 1.; |
177 |
– |
rad2 = intercircle(cent, sp1->aim, sp2->aim, d1r2, d2r2); |
178 |
– |
if (rad2 <= FTINY || normalize(cent) == 0.) |
179 |
– |
return(0); |
180 |
– |
VCOPY(sp1->aim, cent); |
181 |
– |
sp1->siz = 2.*PI*(1. - 1./sqrt(1.+rad2)); |
182 |
– |
return(1); |
183 |
– |
} |
184 |
– |
|
185 |
– |
|
186 |
– |
commonbeam(sp1, sp2, dir) /* set sp1 to intersection of sp1 and sp2 */ |
187 |
– |
register SPOT *sp1, *sp2; |
188 |
– |
FVECT dir; |
189 |
– |
{ |
190 |
– |
FVECT cent, c1, c2; |
191 |
– |
double rad2, d; |
192 |
– |
register int i; |
193 |
– |
/* move centers to common plane */ |
194 |
– |
d = DOT(sp1->aim, dir); |
195 |
– |
for (i = 0; i < 3; i++) |
196 |
– |
c1[i] = sp2->aim[i] - d*dir[i]; |
197 |
– |
d = DOT(sp2->aim, dir); |
198 |
– |
for (i = 0; i < 3; i++) |
199 |
– |
c2[i] = sp2->aim[i] - d*dir[i]; |
200 |
– |
/* compute overlap */ |
201 |
– |
rad2 = intercircle(cent, c1, c2, sp1->siz/PI, sp2->siz/PI); |
202 |
– |
if (rad2 <= FTINY) |
203 |
– |
return(0); |
204 |
– |
VCOPY(sp1->aim, cent); |
205 |
– |
sp1->siz = PI*rad2; |
206 |
– |
return(1); |
207 |
– |
} |
208 |
– |
|
209 |
– |
|
210 |
– |
checkspot(sp, nrm) /* check spotlight for behind source */ |
211 |
– |
register SPOT *sp; |
212 |
– |
FVECT nrm; |
213 |
– |
{ |
214 |
– |
double d, d1; |
215 |
– |
|
216 |
– |
d = DOT(sp->aim, nrm); |
217 |
– |
if (d > FTINY) /* center in front? */ |
218 |
– |
return(0); |
219 |
– |
/* else check horizon */ |
220 |
– |
d1 = 1. - sp->siz/(2.*PI); |
221 |
– |
return(1.-FTINY-d*d > d1*d1); |
222 |
– |
} |
223 |
– |
|
224 |
– |
|
225 |
– |
mirrorproj(m, nv, offs) /* get mirror projection for surface */ |
226 |
– |
register MAT4 m; |
227 |
– |
FVECT nv; |
228 |
– |
double offs; |
229 |
– |
{ |
230 |
– |
register int i, j; |
231 |
– |
/* assign matrix */ |
232 |
– |
setident4(m); |
233 |
– |
for (i = 0; i < 3; i++) |
234 |
– |
for (j = 0; j < 3; j++) |
235 |
– |
m[i][j] -= 2.*nv[i]*nv[j]; |
236 |
– |
for (j = 0; j < 3; j++) |
237 |
– |
m[3][j] = 2.*offs*nv[j]; |
238 |
– |
} |
239 |
– |
|
240 |
– |
|
194 |
|
double |
195 |
< |
intercircle(cc, c1, c2, r1s, r2s) /* intersect two circles */ |
196 |
< |
FVECT cc; /* midpoint (return value) */ |
244 |
< |
FVECT c1, c2; /* circle centers */ |
245 |
< |
double r1s, r2s; /* radii squared */ |
246 |
< |
{ |
247 |
< |
double a2, d2, l; |
248 |
< |
FVECT disp; |
249 |
< |
register int i; |
250 |
< |
|
251 |
< |
for (i = 0; i < 3; i++) |
252 |
< |
disp[i] = c2[i] - c1[i]; |
253 |
< |
d2 = DOT(disp,disp); |
254 |
< |
/* circle within overlap? */ |
255 |
< |
if (r1s < r2s) { |
256 |
< |
if (r2s >= r1s + d2) { |
257 |
< |
VCOPY(cc, c1); |
258 |
< |
return(r1s); |
259 |
< |
} |
260 |
< |
} else { |
261 |
< |
if (r1s >= r2s + d2) { |
262 |
< |
VCOPY(cc, c2); |
263 |
< |
return(r2s); |
264 |
< |
} |
265 |
< |
} |
266 |
< |
a2 = .25*(2.*(r1s+r2s) - d2 - (r2s-r1s)*(r2s-r1s)/d2); |
267 |
< |
/* no overlap? */ |
268 |
< |
if (a2 <= 0.) |
269 |
< |
return(0.); |
270 |
< |
l = sqrt((r1s - a2)/d2); |
271 |
< |
for (i = 0; i < 3; i++) |
272 |
< |
cc[i] = c1[i] + l*disp[i]; |
273 |
< |
return(a2); |
274 |
< |
} |
275 |
< |
|
276 |
< |
|
277 |
< |
/* |
278 |
< |
* The following routines depend on the supported OBJECTS: |
279 |
< |
*/ |
280 |
< |
|
281 |
< |
|
282 |
< |
double |
283 |
< |
getmaxdisk(ocent, op) /* get object center and squared radius */ |
284 |
< |
FVECT ocent; |
285 |
< |
register OBJREC *op; |
286 |
< |
{ |
287 |
< |
double maxrad2; |
288 |
< |
|
289 |
< |
switch (op->otype) { |
290 |
< |
case OBJ_FACE: |
291 |
< |
{ |
292 |
< |
double d1, d2; |
293 |
< |
register int i, j; |
294 |
< |
register FACE *f = getface(op); |
295 |
< |
|
296 |
< |
for (i = 0; i < 3; i++) { |
297 |
< |
ocent[i] = 0.; |
298 |
< |
for (j = 0; j < f->nv; j++) |
299 |
< |
ocent[i] += VERTEX(f,j)[i]; |
300 |
< |
ocent[i] /= (double)f->nv; |
301 |
< |
} |
302 |
< |
maxrad2 = 0.; |
303 |
< |
for (j = 0; j < f->nv; j++) { |
304 |
< |
d2 = 0.; |
305 |
< |
for (i = 0; i < 3; i++) { |
306 |
< |
d1 = VERTEX(f,j)[i] - ocent[i]; |
307 |
< |
d2 += d1*d1; |
308 |
< |
} |
309 |
< |
if (d2 > maxrad2) |
310 |
< |
maxrad2 = d2; |
311 |
< |
} |
312 |
< |
} |
313 |
< |
return(maxrad2); |
314 |
< |
case OBJ_RING: |
315 |
< |
{ |
316 |
< |
register CONE *co = getcone(op, 0); |
317 |
< |
|
318 |
< |
VCOPY(ocent, CO_P0(co)); |
319 |
< |
maxrad2 = CO_R1(co); |
320 |
< |
maxrad2 *= maxrad2; |
321 |
< |
} |
322 |
< |
return(maxrad2); |
323 |
< |
} |
324 |
< |
objerror(op, USER, "illegal material"); |
325 |
< |
} |
326 |
< |
|
327 |
< |
|
328 |
< |
double |
329 |
< |
getplaneq(nvec, op) /* get plane equation for object */ |
330 |
< |
FVECT nvec; |
195 |
> |
getdisk(oc, op, sn) /* get visible object disk */ |
196 |
> |
FVECT oc; |
197 |
|
OBJREC *op; |
198 |
+ |
register int sn; |
199 |
|
{ |
200 |
< |
register FACE *fo; |
201 |
< |
register CONE *co; |
202 |
< |
|
203 |
< |
switch (op->otype) { |
204 |
< |
case OBJ_FACE: |
205 |
< |
fo = getface(op); |
206 |
< |
VCOPY(nvec, fo->norm); |
207 |
< |
return(fo->offset); |
208 |
< |
case OBJ_RING: |
209 |
< |
co = getcone(op, 0); |
210 |
< |
VCOPY(nvec, co->ad); |
211 |
< |
return(DOT(nvec, CO_P0(co))); |
212 |
< |
} |
213 |
< |
objerror(op, USER, "illegal material"); |
200 |
> |
double rad2, roffs, offs, d, rd, rdoto; |
201 |
> |
FVECT rnrm, nrm; |
202 |
> |
/* first, use object getdisk function */ |
203 |
> |
rad2 = (*sfun[op->otype].of->getdisk)(oc, op); |
204 |
> |
if (!(source[sn].sflags & SVIRTUAL)) |
205 |
> |
return(rad2); /* all done for normal source */ |
206 |
> |
/* check for correct side of relay surface */ |
207 |
> |
roffs = (*sfun[source[sn].so->otype].of->getpleq)(rnrm, source[sn].so); |
208 |
> |
rd = DOT(rnrm, source[sn].sloc); /* source projection */ |
209 |
> |
if (!(source[sn].sflags & SDISTANT)) |
210 |
> |
rd -= roffs; |
211 |
> |
d = DOT(rnrm, oc) - roffs; /* disk distance to relay plane */ |
212 |
> |
if ((d > 0.) ^ (rd > 0.)) |
213 |
> |
return(rad2); /* OK if opposite sides */ |
214 |
> |
if (d*d >= rad2) |
215 |
> |
return(.0); /* no relay is possible */ |
216 |
> |
/* we need a closer look */ |
217 |
> |
offs = (*sfun[op->otype].of->getpleq)(nrm, op); |
218 |
> |
rdoto = DOT(rnrm, nrm); |
219 |
> |
if (d*d >= rad2*(1.-rdoto*rdoto)) |
220 |
> |
return(0.); /* disk entirely on projection side */ |
221 |
> |
/* should shrink disk but I'm lazy */ |
222 |
> |
return(rad2); |
223 |
|
} |
224 |
|
|
225 |
|
|
226 |
< |
/* |
227 |
< |
* The following routines depend on the supported MATERIALS: |
228 |
< |
*/ |
229 |
< |
|
230 |
< |
|
231 |
< |
vproject(o, s, n) /* create projected source(s) if they exist */ |
232 |
< |
OBJREC *o; |
357 |
< |
SRCREC *s; |
358 |
< |
int n; |
226 |
> |
int |
227 |
> |
vstestvis(f, o, oc, or2, sn) /* pretest source visibility */ |
228 |
> |
int f; /* virtual source flags */ |
229 |
> |
OBJREC *o; /* relay object */ |
230 |
> |
FVECT oc; /* relay object center */ |
231 |
> |
double or2; /* relay object radius squared */ |
232 |
> |
register int sn; /* target source number */ |
233 |
|
{ |
234 |
< |
SRCREC *ns; |
235 |
< |
FVECT norm; |
236 |
< |
double offset; |
237 |
< |
MAT4 proj; |
238 |
< |
/* get surface normal and offset */ |
239 |
< |
offset = getplaneq(norm, o); |
240 |
< |
switch (objptr(o->omod)->otype) { |
241 |
< |
case MAT_MIRROR: /* mirror source */ |
242 |
< |
if (DOT(s->sloc, norm) <= (s->sflags & SDISTANT ? |
243 |
< |
FTINY : offset+FTINY)) |
244 |
< |
return; /* behind mirror */ |
245 |
< |
mirrorproj(proj, norm, offset); |
246 |
< |
if ((ns = makevsrc(o, s, proj)) != NULL) |
247 |
< |
addvirtuals(ns, n); |
248 |
< |
break; |
249 |
< |
} |
250 |
< |
} |
251 |
< |
|
252 |
< |
|
253 |
< |
vsrcrelay(rn, rv) /* relay virtual source ray */ |
254 |
< |
register RAY *rn, *rv; |
255 |
< |
{ |
256 |
< |
int snext; |
257 |
< |
register int i; |
258 |
< |
/* source we're aiming for here */ |
259 |
< |
snext = source[rv->rsrc].sa.svnext; |
260 |
< |
/* compute relayed ray direction */ |
387 |
< |
switch (objptr(rv->ro->omod)->otype) { |
388 |
< |
case MAT_MIRROR: /* mirror: singular reflection */ |
389 |
< |
rayorigin(rn, rv, REFLECTED, 1.); |
390 |
< |
/* ignore textures */ |
234 |
> |
RAY sr; |
235 |
> |
FVECT onorm; |
236 |
> |
FVECT offsdir; |
237 |
> |
double or, d; |
238 |
> |
int nok, nhit; |
239 |
> |
register int i, n; |
240 |
> |
/* return if pretesting disabled */ |
241 |
> |
if (vspretest <= 0) |
242 |
> |
return(f); |
243 |
> |
/* get surface normal */ |
244 |
> |
(*sfun[o->otype].of->getpleq)(onorm, o); |
245 |
> |
/* set number of rays to sample */ |
246 |
> |
if (source[sn].sflags & SDISTANT) |
247 |
> |
n = (2./3.*PI*PI)*or2/(thescene.cusize*thescene.cusize)* |
248 |
> |
vspretest + .5; |
249 |
> |
else |
250 |
> |
n = or2/dist2(oc,source[sn].sloc)*vspretest + .5; |
251 |
> |
if (n < 1) n = 1; |
252 |
> |
/* limit tests to central region */ |
253 |
> |
or = DISKTFRAC*sqrt(or2); |
254 |
> |
/* sample */ |
255 |
> |
nhit = nok = 0; |
256 |
> |
while (n-- > 0) { |
257 |
> |
samplendx++; |
258 |
> |
/* |
259 |
> |
* We're being real sloppy with our sample locations here. |
260 |
> |
*/ |
261 |
|
for (i = 0; i < 3; i++) |
262 |
< |
rn->rdir[i] = rv->rdir[i] + 2.*rv->rod*rv->ron[i]; |
263 |
< |
break; |
264 |
< |
#ifdef DEBUG |
265 |
< |
default: |
266 |
< |
error(CONSISTENCY, "inappropriate material in vsrcrelay"); |
267 |
< |
#endif |
262 |
> |
offsdir[i] = or*(1. - 2.*urand(931*i+5821+n)); |
263 |
> |
d = DOT(offsdir,onorm); |
264 |
> |
for (i = 0; i < 3; i++) |
265 |
> |
sr.rorg[i] = oc[i] + (1.-d)*offsdir[i]; |
266 |
> |
/* check against source */ |
267 |
> |
if (srcray(&sr, NULL, sn) == 0.0) |
268 |
> |
continue; |
269 |
> |
sr.revf = srcvalue; |
270 |
> |
rayvalue(&sr); |
271 |
> |
if (bright(sr.rcol) <= FTINY) |
272 |
> |
continue; |
273 |
> |
nok++; |
274 |
> |
/* check against obstructions */ |
275 |
> |
srcray(&sr, NULL, sn); |
276 |
> |
rayvalue(&sr); |
277 |
> |
if (bright(sr.rcol) <= FTINY) |
278 |
> |
continue; |
279 |
> |
nhit++; |
280 |
|
} |
281 |
< |
rn->rsrc = snext; |
281 |
> |
/* interpret results */ |
282 |
> |
if (nhit == 0) |
283 |
> |
return(f | SSKIP); /* 0% hit rate: totally occluded */ |
284 |
> |
if (nhit == nok) |
285 |
> |
return(f & ~SFOLLOW); /* 100% hit rate: no occlusion */ |
286 |
> |
return(f); /* no comment */ |
287 |
|
} |
288 |
+ |
|
289 |
|
|
290 |
< |
|
291 |
< |
m_mirror(m, r) /* shade mirrored ray */ |
292 |
< |
register OBJREC *m; |
293 |
< |
register RAY *r; |
290 |
> |
#ifdef DEBUG |
291 |
> |
virtverb(sn, fp) /* print verbose description of virtual source */ |
292 |
> |
register int sn; |
293 |
> |
FILE *fp; |
294 |
|
{ |
407 |
– |
COLOR mcolor; |
408 |
– |
RAY nr; |
295 |
|
register int i; |
296 |
|
|
297 |
< |
if (m->oargs.nfargs != 3 || m->oargs.nsargs > 1) |
298 |
< |
objerror(m, USER, "bad number of arguments"); |
299 |
< |
if (r->rsrc >= 0) { /* aiming for somebody */ |
300 |
< |
if (source[r->rsrc].so != r->ro) |
301 |
< |
return; /* but not us */ |
302 |
< |
} else if (m->oargs.nsargs > 0) { /* else call substitute? */ |
303 |
< |
rayshade(r, modifier(m->oargs.sarg[0])); |
297 |
> |
fprintf(fp, "%s virtual source %d in %s %s\n", |
298 |
> |
source[sn].sflags & SDISTANT ? "distant" : "local", |
299 |
> |
sn, ofun[source[sn].so->otype].funame, |
300 |
> |
source[sn].so->oname); |
301 |
> |
fprintf(fp, "\tat (%f,%f,%f)\n", |
302 |
> |
source[sn].sloc[0], source[sn].sloc[1], source[sn].sloc[2]); |
303 |
> |
fprintf(fp, "\tlinked to source %d (%s)\n", |
304 |
> |
source[sn].sa.svnext, source[source[sn].sa.svnext].so->oname); |
305 |
> |
if (source[sn].sflags & SFOLLOW) |
306 |
> |
fprintf(fp, "\talways followed\n"); |
307 |
> |
else |
308 |
> |
fprintf(fp, "\tnever followed\n"); |
309 |
> |
if (!(source[sn].sflags & SSPOT)) |
310 |
|
return; |
311 |
< |
} |
312 |
< |
if (r->rod < 0.) /* back is black */ |
313 |
< |
return; |
422 |
< |
/* get modifiers */ |
423 |
< |
raytexture(r, m->omod); |
424 |
< |
/* assign material color */ |
425 |
< |
setcolor(mcolor, m->oargs.farg[0], |
426 |
< |
m->oargs.farg[1], |
427 |
< |
m->oargs.farg[2]); |
428 |
< |
multcolor(mcolor, r->pcol); |
429 |
< |
/* compute reflected ray */ |
430 |
< |
if (r->rsrc >= 0) /* relayed light source */ |
431 |
< |
vsrcrelay(&nr, r); |
432 |
< |
else { /* ordinary reflection */ |
433 |
< |
FVECT pnorm; |
434 |
< |
double pdot; |
435 |
< |
|
436 |
< |
if (rayorigin(&nr, r, REFLECTED, bright(mcolor)) < 0) |
437 |
< |
return; |
438 |
< |
pdot = raynormal(pnorm, r); /* use textures */ |
439 |
< |
for (i = 0; i < 3; i++) |
440 |
< |
nr.rdir[i] = r->rdir[i] + 2.*pdot*pnorm[i]; |
441 |
< |
} |
442 |
< |
rayvalue(&nr); |
443 |
< |
multcolor(nr.rcol, mcolor); |
444 |
< |
addcolor(r->rcol, nr.rcol); |
311 |
> |
fprintf(fp, "\twith spot aim (%f,%f,%f) and size %f\n", |
312 |
> |
source[sn].sl.s->aim[0], source[sn].sl.s->aim[1], |
313 |
> |
source[sn].sl.s->aim[2], source[sn].sl.s->siz); |
314 |
|
} |
315 |
+ |
#endif |