57 |
|
d = urand(ilhash(dimlist,ndims+2)+samplendx); |
58 |
|
if (source[si->sn].sflags & SFLAT) { |
59 |
|
multisamp(vpos, 2, d); |
60 |
< |
vpos[2] = 0.5; |
60 |
> |
vpos[SW] = 0.5; |
61 |
|
} else |
62 |
|
multisamp(vpos, 3, d); |
63 |
|
for (i = 0; i < 3; i++) |
68 |
|
|
69 |
|
for (i = 0; i < 3; i++) |
70 |
|
vpos[i] += (double)cent[i]/MAXSPART; |
71 |
+ |
/* avoid circular aiming failures */ |
72 |
+ |
if ((source[si->sn].sflags & SCIR) && (si->np > 1 || dstrsrc > 0.7)) { |
73 |
+ |
FVECT trim; |
74 |
+ |
if (source[si->sn].sflags & (SFLAT|SDISTANT)) { |
75 |
+ |
d = 1.12837917; /* correct setflatss() */ |
76 |
+ |
trim[SU] = d*sqrt(1.0 - 0.5*vpos[SV]*vpos[SV]); |
77 |
+ |
trim[SV] = d*sqrt(1.0 - 0.5*vpos[SU]*vpos[SU]); |
78 |
+ |
trim[SW] = 0.0; |
79 |
+ |
} else { |
80 |
+ |
trim[SW] = trim[SU] = vpos[SU]*vpos[SU]; |
81 |
+ |
d = vpos[SV]*vpos[SV]; |
82 |
+ |
if (d > trim[SW]) trim[SW] = d; |
83 |
+ |
trim[SU] += d; |
84 |
+ |
d = vpos[SW]*vpos[SW]; |
85 |
+ |
if (d > trim[SW]) trim[SW] = d; |
86 |
+ |
trim[SU] += d; |
87 |
+ |
if (trim[SU] > FTINY*FTINY) { |
88 |
+ |
d = 1.0/0.7236; /* correct sphsetsrc() */ |
89 |
+ |
trim[SW] = trim[SV] = trim[SU] = |
90 |
+ |
d*sqrt(trim[SW]/trim[SU]); |
91 |
+ |
} else |
92 |
+ |
trim[SW] = trim[SV] = trim[SU] = 0.0; |
93 |
+ |
} |
94 |
+ |
for (i = 0; i < 3; i++) |
95 |
+ |
vpos[i] *= trim[i]; |
96 |
+ |
} |
97 |
|
/* compute direction */ |
98 |
|
for (i = 0; i < 3; i++) |
99 |
|
r->rdir[i] = source[si->sn].sloc[i] + |
140 |
|
/* check this partition */ |
141 |
|
p = spart(pt, pp[0]); |
142 |
|
pp[0]++; |
143 |
< |
if (p == S0) /* leaf partition */ |
143 |
> |
if (p == S0) { /* leaf partition */ |
144 |
|
if (pp[1]) { |
145 |
|
pp[1]--; |
146 |
|
return(0); /* not there yet */ |
147 |
|
} else |
148 |
|
return(1); /* we've arrived */ |
149 |
+ |
} |
150 |
|
/* else check lower */ |
151 |
|
sz[p] >>= 1; |
152 |
|
ct[p] -= sz[p]; |
267 |
|
v[1] = r->rorg[1] - vp[1]; |
268 |
|
v[2] = r->rorg[2] - vp[2]; |
269 |
|
vp = source[si->sn].snorm; |
270 |
< |
if (DOT(v,vp) <= FTINY) { /* behind source */ |
270 |
> |
if (DOT(v,vp) <= 0.) { /* behind source */ |
271 |
|
si->np = 0; |
272 |
|
return; |
273 |
|
} |