16 |
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#include "source.h" |
17 |
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|
18 |
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|
19 |
< |
double intercircle(); |
19 |
> |
double intercircle(), getdisk(); |
20 |
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|
21 |
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static OBJECT *vobject; /* virtual source objects */ |
22 |
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static int nvobjects = 0; /* number of virtual source objects */ |
97 |
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if ((*vsmat->vproj)(proj, o, &source[sn], i)) |
98 |
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if ((ns = makevsrc(o, sn, proj)) >= 0) { |
99 |
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#ifdef DEBUG |
100 |
< |
virtverb(&source[ns], stderr); |
100 |
> |
virtverb(ns, stderr); |
101 |
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#endif |
102 |
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addvirtuals(ns, n); |
103 |
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} |
110 |
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register int sn; |
111 |
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MAT4 pm; |
112 |
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{ |
113 |
< |
register int nsn; |
114 |
< |
FVECT nsloc, ocent, nsnorm; |
115 |
< |
int nsflags; |
113 |
> |
FVECT nsloc, nsnorm, ocent; |
114 |
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double maxrad2; |
115 |
+ |
int nsflags; |
116 |
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double d1; |
117 |
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SPOT theirspot, ourspot; |
118 |
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register int i; |
119 |
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|
120 |
< |
nsflags = (source[sn].sflags|(SVIRTUAL|SFOLLOW)) & ~SSPOT; |
120 |
> |
nsflags = source[sn].sflags | (SVIRTUAL|SSPOT|SFOLLOW); |
121 |
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/* get object center and max. radius */ |
122 |
< |
if (sfun[op->otype].of->getdisk != NULL) { |
123 |
< |
maxrad2 = (*sfun[op->otype].of->getdisk)(ocent, op); |
124 |
< |
if (maxrad2 <= FTINY) /* too small? */ |
126 |
< |
return(-1); |
127 |
< |
nsflags |= SSPOT; |
128 |
< |
} |
122 |
> |
maxrad2 = getdisk(ocent, op, sn); |
123 |
> |
if (maxrad2 <= FTINY) /* too small? */ |
124 |
> |
return(-1); |
125 |
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/* get location and spot */ |
126 |
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if (source[sn].sflags & SDISTANT) { /* distant source */ |
127 |
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if (source[sn].sflags & SPROX) |
128 |
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return(-1); /* should never get here! */ |
129 |
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multv3(nsloc, source[sn].sloc, pm); |
130 |
< |
if (nsflags & SSPOT) { |
131 |
< |
VCOPY(ourspot.aim, ocent); |
132 |
< |
ourspot.siz = PI*maxrad2; |
137 |
< |
ourspot.flen = 0.; |
138 |
< |
} |
130 |
> |
VCOPY(ourspot.aim, ocent); |
131 |
> |
ourspot.siz = PI*maxrad2; |
132 |
> |
ourspot.flen = 0.; |
133 |
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if (source[sn].sflags & SSPOT) { |
134 |
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copystruct(&theirspot, source[sn].sl.s); |
135 |
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multp3(theirspot.aim, source[sn].sl.s->aim, pm); |
136 |
< |
if (nsflags & SSPOT && |
143 |
< |
!commonbeam(&ourspot, &theirspot, nsloc)) |
136 |
> |
if (!commonbeam(&ourspot, &theirspot, nsloc)) |
137 |
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return(-1); /* no overlap */ |
138 |
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} |
139 |
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} else { /* local source */ |
140 |
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multp3(nsloc, source[sn].sloc, pm); |
141 |
< |
if (nsflags & SSPOT) { |
142 |
< |
for (i = 0; i < 3; i++) |
143 |
< |
ourspot.aim[i] = ocent[i] - nsloc[i]; |
144 |
< |
if ((d1 = normalize(ourspot.aim)) == 0.) |
145 |
< |
return(-1); /* at source!! */ |
146 |
< |
if (source[sn].sflags & SPROX && |
147 |
< |
d1 > source[sn].sl.prox) |
148 |
< |
return(-1); /* too far away */ |
156 |
< |
ourspot.siz = 2.*PI*(1. - d1/sqrt(d1*d1+maxrad2)); |
157 |
< |
ourspot.flen = 0.; |
158 |
< |
} else if (source[sn].sflags & SPROX) { |
159 |
< |
FVECT norm; |
160 |
< |
double offs; |
161 |
< |
/* use distance from plane */ |
162 |
< |
offs = (*sfun[op->otype].of->getpleq)(norm, op); |
163 |
< |
d1 = DOT(norm, nsloc) - offs; |
164 |
< |
if (d1 < 0.) d1 = -d1; |
165 |
< |
if (d1 > source[sn].sl.prox) |
166 |
< |
return(-1); /* too far away */ |
167 |
< |
} |
141 |
> |
for (i = 0; i < 3; i++) |
142 |
> |
ourspot.aim[i] = ocent[i] - nsloc[i]; |
143 |
> |
if ((d1 = normalize(ourspot.aim)) == 0.) |
144 |
> |
return(-1); /* at source!! */ |
145 |
> |
if (source[sn].sflags & SPROX && d1 > source[sn].sl.prox) |
146 |
> |
return(-1); /* too far away */ |
147 |
> |
ourspot.siz = 2.*PI*(1. - d1/sqrt(d1*d1+maxrad2)); |
148 |
> |
ourspot.flen = 0.; |
149 |
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if (source[sn].sflags & SSPOT) { |
150 |
|
copystruct(&theirspot, source[sn].sl.s); |
151 |
|
multv3(theirspot.aim, source[sn].sl.s->aim, pm); |
152 |
< |
if (nsflags & SSPOT) { |
153 |
< |
if (!commonspot(&ourspot, &theirspot, nsloc)) |
154 |
< |
return(-1); /* no overlap */ |
174 |
< |
ourspot.flen = theirspot.flen; |
175 |
< |
} |
152 |
> |
if (!commonspot(&ourspot, &theirspot, nsloc)) |
153 |
> |
return(-1); /* no overlap */ |
154 |
> |
ourspot.flen = theirspot.flen; |
155 |
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} |
156 |
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if (source[sn].sflags & SFLAT) { /* behind source? */ |
157 |
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multv3(nsnorm, source[sn].snorm, pm); |
158 |
< |
if (nsflags & SSPOT && checkspot(&ourspot, nsnorm) < 0) |
158 |
> |
if (checkspot(&ourspot, nsnorm) < 0) |
159 |
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return(-1); |
160 |
|
} |
161 |
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} |
162 |
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/* everything is OK, make source */ |
163 |
< |
if ((nsn = newsource()) < 0) |
163 |
> |
if ((i = newsource()) < 0) |
164 |
|
goto memerr; |
165 |
< |
source[nsn].sflags = nsflags; |
166 |
< |
VCOPY(source[nsn].sloc, nsloc); |
165 |
> |
source[i].sflags = nsflags; |
166 |
> |
VCOPY(source[i].sloc, nsloc); |
167 |
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if (nsflags & SFLAT) |
168 |
< |
VCOPY(source[nsn].snorm, nsnorm); |
169 |
< |
source[nsn].ss = source[sn].ss; source[nsn].ss2 = source[sn].ss2; |
170 |
< |
if ((nsflags | source[sn].sflags) & SSPOT) { |
171 |
< |
if ((source[nsn].sl.s = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
172 |
< |
goto memerr; |
194 |
< |
if (nsflags & SSPOT) |
195 |
< |
copystruct(source[nsn].sl.s, &ourspot); |
196 |
< |
else |
197 |
< |
copystruct(source[nsn].sl.s, &theirspot); |
198 |
< |
source[nsn].sflags |= SSPOT; |
199 |
< |
} |
168 |
> |
VCOPY(source[i].snorm, nsnorm); |
169 |
> |
source[i].ss = source[sn].ss; source[i].ss2 = source[sn].ss2; |
170 |
> |
if ((source[i].sl.s = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
171 |
> |
goto memerr; |
172 |
> |
copystruct(source[i].sl.s, &ourspot); |
173 |
|
if (nsflags & SPROX) |
174 |
< |
source[nsn].sl.prox = source[sn].sl.prox; |
175 |
< |
source[nsn].sa.svnext = sn; |
176 |
< |
source[nsn].so = op; |
177 |
< |
return(nsn); |
174 |
> |
source[i].sl.prox = source[sn].sl.prox; |
175 |
> |
source[i].sa.svnext = sn; |
176 |
> |
source[i].so = op; |
177 |
> |
return(i); |
178 |
|
memerr: |
179 |
|
error(SYSTEM, "out of memory in makevsrc"); |
180 |
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} |
181 |
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|
182 |
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|
183 |
+ |
double |
184 |
+ |
getdisk(oc, op, sn) /* get visible object disk */ |
185 |
+ |
FVECT oc; |
186 |
+ |
OBJREC *op; |
187 |
+ |
register int sn; |
188 |
+ |
{ |
189 |
+ |
double rad2, roffs, offs, d, rd, rdoto; |
190 |
+ |
FVECT rnrm, nrm; |
191 |
+ |
/* first, use object getdisk function */ |
192 |
+ |
rad2 = (*sfun[op->otype].of->getdisk)(oc, op); |
193 |
+ |
if (!(source[sn].sflags & SVIRTUAL)) |
194 |
+ |
return(rad2); /* all done for normal source */ |
195 |
+ |
/* check for correct side of relay surface */ |
196 |
+ |
roffs = (*sfun[source[sn].so->otype].of->getpleq)(rnrm, source[sn].so); |
197 |
+ |
rd = DOT(rnrm, source[sn].sloc); /* source projection */ |
198 |
+ |
if (!(source[sn].sflags & SDISTANT)) |
199 |
+ |
rd -= roffs; |
200 |
+ |
d = DOT(rnrm, oc) - roffs; /* disk distance to relay plane */ |
201 |
+ |
if ((d > 0.) ^ (rd > 0.)) |
202 |
+ |
return(rad2); /* OK if opposite sides */ |
203 |
+ |
if (d*d >= rad2) |
204 |
+ |
return(.0); /* no relay is possible */ |
205 |
+ |
/* we need a closer look */ |
206 |
+ |
offs = (*sfun[op->otype].of->getpleq)(nrm, op); |
207 |
+ |
rdoto = DOT(rnrm, nrm); |
208 |
+ |
if (d*d >= rad2*(1.-rdoto*rdoto)) |
209 |
+ |
return(0.); /* disk entirely on projection side */ |
210 |
+ |
/* should shrink disk but I'm lazy */ |
211 |
+ |
return(rad2); |
212 |
+ |
} |
213 |
+ |
|
214 |
+ |
|
215 |
|
commonspot(sp1, sp2, org) /* set sp1 to intersection of sp1 and sp2 */ |
216 |
|
register SPOT *sp1, *sp2; |
217 |
|
FVECT org; |
312 |
|
|
313 |
|
|
314 |
|
#ifdef DEBUG |
315 |
< |
virtverb(vs, fp) /* print verbose description of virtual source */ |
316 |
< |
register SRCREC *vs; |
315 |
> |
virtverb(sn, fp) /* print verbose description of virtual source */ |
316 |
> |
register int sn; |
317 |
|
FILE *fp; |
318 |
|
{ |
319 |
|
register int i; |
320 |
|
|
321 |
|
fprintf(fp, "%s virtual source %d in %s %s\n", |
322 |
< |
vs->sflags & SDISTANT ? "distant" : "local", |
323 |
< |
vs-source, ofun[vs->so->otype].funame, vs->so->oname); |
322 |
> |
source[sn].sflags & SDISTANT ? "distant" : "local", |
323 |
> |
sn, ofun[source[sn].so->otype].funame, |
324 |
> |
source[sn].so->oname); |
325 |
|
fprintf(fp, "\tat (%f,%f,%f)\n", |
326 |
< |
vs->sloc[0], vs->sloc[1], vs->sloc[2]); |
326 |
> |
source[sn].sloc[0], source[sn].sloc[1], source[sn].sloc[2]); |
327 |
|
fprintf(fp, "\tlinked to source %d (%s)\n", |
328 |
< |
vs->sa.svnext, source[vs->sa.svnext].so->oname); |
329 |
< |
if (vs->sflags & SFOLLOW) |
328 |
> |
source[sn].sa.svnext, source[source[sn].sa.svnext].so->oname); |
329 |
> |
if (source[sn].sflags & SFOLLOW) |
330 |
|
fprintf(fp, "\talways followed\n"); |
331 |
|
else |
332 |
|
fprintf(fp, "\tnever followed\n"); |
333 |
< |
if (!(vs->sflags & SSPOT)) |
333 |
> |
if (!(source[sn].sflags & SSPOT)) |
334 |
|
return; |
335 |
|
fprintf(fp, "\twith spot aim (%f,%f,%f) and size %f\n", |
336 |
< |
vs->sl.s->aim[0], vs->sl.s->aim[1], vs->sl.s->aim[2], |
337 |
< |
vs->sl.s->siz); |
336 |
> |
source[sn].sl.s->aim[0], source[sn].sl.s->aim[1], |
337 |
> |
source[sn].sl.s->aim[2], source[sn].sl.s->siz); |
338 |
|
} |
339 |
|
#endif |