54 |
|
} |
55 |
|
|
56 |
|
|
57 |
– |
double |
57 |
|
divsample(dp, h, r) /* sample a division */ |
58 |
|
register AMBSAMP *dp; |
59 |
|
AMBHEMI *h; |
67 |
|
register int i; |
68 |
|
|
69 |
|
if (rayorigin(&ar, r, AMBIENT, 0.5) < 0) |
70 |
< |
return(0.0); |
70 |
> |
return(-1); |
71 |
|
hlist[0] = r->rno; |
72 |
|
hlist[1] = dp->t; |
73 |
|
hlist[2] = dp->p; |
86 |
|
rayvalue(&ar); |
87 |
|
ndims--; |
88 |
|
addcolor(dp->v, ar.rcol); |
89 |
< |
if (ar.rot < FHUGE) |
90 |
< |
dp->r += 1.0/ar.rot; |
89 |
> |
if (ar.rt < FHUGE) |
90 |
> |
dp->r += 1.0/ar.rt; |
91 |
|
/* (re)initialize error */ |
92 |
|
if (dp->n++) { |
93 |
|
b2 = bright(dp->v)/dp->n - bright(ar.rcol); |
95 |
|
dp->k = b2/(dp->n*dp->n); |
96 |
|
} else |
97 |
|
dp->k = 0.0; |
98 |
< |
return(ar.rot); |
98 |
> |
return(0); |
99 |
|
} |
100 |
|
|
101 |
|
|
138 |
|
setcolor(dp->v, 0.0, 0.0, 0.0); |
139 |
|
dp->r = 0.0; |
140 |
|
dp->n = 0; |
141 |
< |
if ((d = divsample(dp, &hemi, r)) == 0.0) |
141 |
> |
if (divsample(dp, &hemi, r) < 0) |
142 |
|
goto oopsy; |
143 |
|
if (div != NULL) |
144 |
|
dp++; |
148 |
|
} |
149 |
|
} |
150 |
|
if (ns > 0) { /* perform super-sampling */ |
151 |
< |
comperrs(div, hemi); /* compute errors */ |
151 |
> |
comperrs(div, &hemi); /* compute errors */ |
152 |
|
qsort(div, ndivs, sizeof(AMBSAMP), ambcmp); /* sort divs */ |
154 |
– |
dp = div + ndivs; /* skim excess */ |
155 |
– |
for (i = ndivs; i > ns; i--) { |
156 |
– |
dp--; |
157 |
– |
addcolor(acol, dp->v); |
158 |
– |
arad += dp->r; |
159 |
– |
} |
153 |
|
/* super-sample */ |
154 |
|
for (i = ns; i > 0; i--) { |
155 |
|
copystruct(&dnew, div); |
156 |
< |
if ((d = divsample(&dnew, &hemi)) == 0.0) |
156 |
> |
if (divsample(&dnew, &hemi, r) < 0) |
157 |
|
goto oopsy; |
165 |
– |
if (d < FHUGE) |
166 |
– |
arad += 1.0 / d; |
158 |
|
/* reinsert */ |
159 |
|
dp = div; |
160 |
|
j = ndivs < i ? ndivs : i; |
163 |
|
dp++; |
164 |
|
} |
165 |
|
copystruct(dp, &dnew); |
175 |
– |
/* extract darkest */ |
176 |
– |
if (i <= ndivs) { |
177 |
– |
dp = div + i-1; |
178 |
– |
arad += dp->r; |
179 |
– |
if (dp->n > 1) { |
180 |
– |
b = 1.0/dp->n; |
181 |
– |
scalecolor(dp->v, b); |
182 |
– |
dp->r *= b; |
183 |
– |
dp->n = 1; |
184 |
– |
} |
185 |
– |
addcolor(acol, dp->v); |
186 |
– |
} |
166 |
|
} |
167 |
|
if (pg != NULL || dg != NULL) /* restore order */ |
168 |
|
qsort(div, ndivs, sizeof(AMBSAMP), ambnorm); |
169 |
|
} |
170 |
|
/* compute returned values */ |
171 |
< |
if (pg != NULL) |
172 |
< |
posgradient(pg, div, &hemi); |
173 |
< |
if (dg != NULL) |
174 |
< |
dirgradient(dg, div, &hemi); |
175 |
< |
if (div != NULL) |
171 |
> |
if (div != NULL) { |
172 |
> |
for (i = ndivs, dp = div; i-- > 0; dp++) { |
173 |
> |
arad += dp->r; |
174 |
> |
if (dp->n > 1) { |
175 |
> |
b = 1.0/dp->n; |
176 |
> |
scalecolor(dp->v, b); |
177 |
> |
dp->r *= b; |
178 |
> |
dp->n = 1; |
179 |
> |
} |
180 |
> |
addcolor(acol, dp->v); |
181 |
> |
} |
182 |
> |
if (pg != NULL) |
183 |
> |
posgradient(pg, div, &hemi); |
184 |
> |
if (dg != NULL) |
185 |
> |
dirgradient(dg, div, &hemi); |
186 |
|
free((char *)div); |
187 |
+ |
} |
188 |
|
b = 1.0/ndivs; |
189 |
|
scalecolor(acol, b); |
190 |
|
if (arad <= FTINY) |
221 |
|
if (i >= 3) |
222 |
|
error(CONSISTENCY, "bad ray direction in inithemi"); |
223 |
|
hp->uy[i] = 1.0; |
224 |
< |
fcross(hp->ux, hp->uz, hp->uy); |
224 |
> |
fcross(hp->ux, hp->uy, hp->uz); |
225 |
|
normalize(hp->ux); |
226 |
< |
fcross(hp->uy, hp->ux, hp->uz); |
226 |
> |
fcross(hp->uy, hp->uz, hp->ux); |
227 |
|
} |
228 |
|
|
229 |
|
|
250 |
|
b2 *= b2 * 0.25; |
251 |
|
dp[0].k += b2; |
252 |
|
dp[-1].k += b2; |
253 |
< |
} |
254 |
< |
if (j == hp->np-1) { /* around */ |
265 |
< |
b2 = bright(dp[-(hp->np-1)].v) - b; |
253 |
> |
} else { /* around */ |
254 |
> |
b2 = bright(dp[hp->np-1].v) - b; |
255 |
|
b2 *= b2 * 0.25; |
256 |
|
dp[0].k += b2; |
257 |
< |
dp[-(hp->np-1)].k += b2; |
257 |
> |
dp[hp->np-1].k += b2; |
258 |
|
} |
259 |
|
dp++; |
260 |
|
} |
312 |
|
dp += hp->np; |
313 |
|
} |
314 |
|
if (hp->nt > 1) { |
315 |
< |
mag0 /= (double)(hp->nt-1); |
315 |
> |
mag0 /= (double)hp->np; |
316 |
|
mag1 /= (double)hp->nt; |
317 |
|
} |
318 |
|
phi = 2.0*PI * (double)j/hp->np; |
321 |
|
yd += mag0*sinp + mag1*cosp; |
322 |
|
} |
323 |
|
for (i = 0; i < 3; i++) |
324 |
< |
gv[i] = (xd*hp->ux[i] + yd*hp->uy[i])/hp->np; |
324 |
> |
gv[i] = xd*hp->ux[i] + yd*hp->uy[i]; |
325 |
|
} |
326 |
|
|
327 |
|
|