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root/radiance/ray/src/rt/m_bsdf.c
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Comparing ray/src/rt/m_bsdf.c (file contents):
Revision 2.41 by greg, Tue Jul 18 21:33:14 2017 UTC vs.
Revision 2.44 by greg, Sat Dec 2 16:13:04 2017 UTC

# Line 128 | Line 128 | compute_through(BSDFDAT *ndp)
128          srchrad = sqrt(dfp->minProjSA);         /* else search for peak */
129          setcolor(vpeak, 0, 0, 0);
130          setcolor(vsum, 0, 0, 0);
131 +        pdir[2] = 0.0;
132          for (i = 0; i < NDIR2CHECK; i++) {
133                  FVECT   tdir;
134                  SDValue sv;
# Line 146 | Line 147 | compute_through(BSDFDAT *ndp)
147                          VCOPY(pdir, tdir);
148                  }
149          }
150 +        if (pdir[2] == 0.0)
151 +                return;                         /* zero neighborhood */
152          ec = SDsizeBSDF(&tomega, pdir, ndp->vray, SDqueryMin, ndp->sd);
153          if (ec)
154                  goto baderror;
155          if (tomega > 1.5*dfp->minProjSA)
156                  return;                         /* not really a peak? */
157 +        tomega /= fabs(pdir[2]);                /* remove cosine factor */
158          if ((bright(vpeak) - ndp->sd->tLamb.cieY*(1./PI))*tomega <= .001)
159                  return;                         /* < 0.1% transmission */
160          for (i = 3; i--; )                      /* remove peak from average */
# Line 184 | Line 188 | bsdf_jitter(FVECT vres, BSDFDAT *ndp, double sr_psa)
188   static int
189   direct_specular_OK(COLOR cval, FVECT ldir, double omega, BSDFDAT *ndp)
190   {
191 <        int     nsamp, ok = 0;
191 >        int     nsamp;
192 >        double  wtot = 0;
193          FVECT   vsrc, vsmp, vjit;
194          double  tomega, tomega2;
195          double  sf, tsr, sd[2];
# Line 269 | Line 274 | direct_specular_OK(COLOR cval, FVECT ldir, double omeg
274                  if (tomega2 < .12*tomega)
275                          continue;       /* not safe to include */
276                  cvt_sdcolor(csmp, &sv);
277 <                addcolor(cval, csmp);   /* else average it in */
278 <                ++ok;
277 >
278 >                if (sf < 2.5*tsr) {     /* weight by Y for small sources */
279 >                        scalecolor(csmp, sv.cieY);
280 >                        wtot += sv.cieY;
281 >                } else
282 >                        wtot += 1.;
283 >                addcolor(cval, csmp);
284          }
285 <        if (!ok)                        /* no valid specular samples? */
285 >        if (wtot <= FTINY)              /* no valid specular samples? */
286                  return(0);
287  
288 <        sf = 1./(double)ok;             /* compute average BSDF */
288 >        sf = 1./wtot;                   /* weighted average BSDF */
289          scalecolor(cval, sf);
290                                          /* subtract diffuse contribution */
291          for (i = 3*(diffY > FTINY); i--; )
# Line 535 | Line 545 | sample_sdf(BSDFDAT *ndp, int sflags)
545                  } else
546                          hasthru = 0;
547          }
548 <        if (dfp->maxHemi - b <= FTINY) {        /* how specular to sample? */
548 >        if (dfp->maxHemi - b <= FTINY) {        /* have specular to sample? */
549                  b = 0;
550          } else {
551                  FVECT   vjit;

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