24 |
|
FVECT vpos; |
25 |
|
double d; |
26 |
|
register int i; |
27 |
< |
tryagain: |
27 |
> |
|
28 |
|
while (++si->sp >= si->np) { /* get next sample */ |
29 |
|
if (++si->sn >= nsources) |
30 |
|
return(0.0); /* no more */ |
31 |
< |
if (srcsizerat <= FTINY) |
31 |
> |
if (source[si->sn].sflags & SSKIP) |
32 |
> |
si->np = 0; |
33 |
> |
else if (srcsizerat <= FTINY) |
34 |
|
nopart(si, r); |
35 |
|
else { |
36 |
|
for (i = si->sn; source[i].sflags & SVIRTUAL; |
76 |
|
r->rdir[i] -= r->rorg[i]; |
77 |
|
/* compute distance */ |
78 |
|
if ((d = normalize(r->rdir)) == 0.0) |
79 |
< |
goto tryagain; /* at source! */ |
79 |
> |
return(nextssamp(r, si)); /* at source! */ |
80 |
|
|
81 |
|
/* compute sample size */ |
82 |
|
si->dom = source[si->sn].ss2; |
83 |
|
if (source[si->sn].sflags & SFLAT) { |
84 |
|
si->dom *= sflatform(si->sn, r->rdir); |
83 |
– |
if (si->dom <= FTINY) { /* behind source */ |
84 |
– |
si->np = 0; |
85 |
– |
goto tryagain; |
86 |
– |
} |
85 |
|
si->dom *= (double)(size[SU]*size[SV])/(MAXSPART*MAXSPART); |
86 |
|
} else if (source[si->sn].sflags & SCYL) { |
87 |
|
si->dom *= scylform(si->sn, r->rdir); |
163 |
|
return; |
164 |
|
} |
165 |
|
safedist2 *= 4.*r->rweight*r->rweight/(srcsizerat*srcsizerat); |
166 |
< |
if (dist2 <= 4.*rad2 || /* point too close to subdivide? */ |
167 |
< |
dist2cent >= safedist2) { /* too far? */ |
166 |
> |
if (dist2 <= 4.*rad2 || /* point too close to subdivide */ |
167 |
> |
dist2cent >= safedist2) { /* or too far */ |
168 |
|
setpart(si->spt, 0, S0); |
169 |
|
si->np = 1; |
170 |
|
return; |
216 |
|
|
217 |
|
flatpart(si, r) /* partition a flat source */ |
218 |
|
register SRCINDEX *si; |
219 |
< |
RAY *r; |
219 |
> |
register RAY *r; |
220 |
|
{ |
221 |
< |
register double *vp; |
221 |
> |
register FLOAT *vp; |
222 |
> |
FVECT v; |
223 |
|
double du2, dv2; |
224 |
|
int pi; |
225 |
|
|
226 |
+ |
clrpart(si->spt); |
227 |
+ |
vp = source[si->sn].sloc; |
228 |
+ |
v[0] = r->rorg[0] - vp[0]; |
229 |
+ |
v[1] = r->rorg[1] - vp[1]; |
230 |
+ |
v[2] = r->rorg[2] - vp[2]; |
231 |
+ |
vp = source[si->sn].snorm; |
232 |
+ |
if (DOT(v,vp) <= FTINY) { /* behind source */ |
233 |
+ |
si->np = 0; |
234 |
+ |
return; |
235 |
+ |
} |
236 |
|
dv2 = 2.*r->rweight/srcsizerat; |
237 |
|
dv2 *= dv2; |
238 |
|
vp = source[si->sn].ss[SU]; |
239 |
|
du2 = dv2 * DOT(vp,vp); |
240 |
|
vp = source[si->sn].ss[SV]; |
241 |
|
dv2 *= DOT(vp,vp); |
233 |
– |
clrpart(si->spt); |
242 |
|
pi = 0; |
243 |
|
si->np = flt_partit(r->rorg, si->spt, &pi, MAXSPART, |
244 |
|
source[si->sn].sloc, |
302 |
|
int sn; |
303 |
|
register FVECT dir; /* assume normalized */ |
304 |
|
{ |
305 |
< |
register double *dv; |
305 |
> |
register FLOAT *dv; |
306 |
|
double d; |
307 |
|
|
308 |
|
dv = source[sn].ss[SU]; |