259 |
|
*c_cmaterial = *(C_MATERIAL *)lp->data; |
260 |
|
c_cmaterial->clock = i + 1; |
261 |
|
return(MG_OK); |
262 |
+ |
case MG_E_IR: /* set index of refraction */ |
263 |
+ |
if (ac != 3) |
264 |
+ |
return(MG_EARGC); |
265 |
+ |
if (!isflt(av[1]) | !isflt(av[2])) |
266 |
+ |
return(MG_ETYPE); |
267 |
+ |
c_cmaterial->nr = atof(av[1]); |
268 |
+ |
c_cmaterial->ni = atof(av[2]); |
269 |
+ |
if (c_cmaterial->nr <= FTINY) |
270 |
+ |
return(MG_EILL); |
271 |
+ |
c_cmaterial->clock++; |
272 |
+ |
return(MG_OK); |
273 |
|
case MG_E_RD: /* set diffuse reflectance */ |
274 |
|
if (ac != 2) |
275 |
|
return(MG_EARGC); |
565 |
|
int n, imax; |
566 |
|
int wl; |
567 |
|
double wl0, wlstep; |
568 |
+ |
double boxpos, boxstep; |
569 |
|
/* check bounds */ |
570 |
|
if (wlmax <= C_CMINWL | wlmax <= wlmin | wlmin >= C_CMAXWL) |
571 |
|
return(MG_EILL); |
578 |
|
wlmax -= wlstep; |
579 |
|
ac--; |
580 |
|
} |
569 |
– |
if (ac < 2) |
570 |
– |
return(MG_EILL); |
581 |
|
imax = ac; /* box filter if necessary */ |
582 |
+ |
boxpos = 0; |
583 |
+ |
boxstep = 1; |
584 |
|
if (wlstep < C_CWLI) { |
585 |
+ |
imax = (wlmax - wlmin)/C_CWLI + (1-FTINY); |
586 |
+ |
boxpos = (wlmin - C_CMINWL)/C_CWLI; |
587 |
+ |
boxstep = wlstep/C_CWLI; |
588 |
|
wlstep = C_CWLI; |
574 |
– |
imax = (wlmax - wlmin)/wlstep; |
589 |
|
} |
590 |
|
scale = 0.; /* get values and maximum */ |
591 |
|
pos = 0; |
592 |
|
for (i = 0; i < imax; i++) { |
593 |
|
va[i] = 0.; n = 0; |
594 |
< |
while (pos < (i+.5)*ac/imax) { |
594 |
> |
while (boxpos < i+.5 && pos < ac) { |
595 |
|
if (!isflt(av[pos])) |
596 |
|
return(MG_ETYPE); |
597 |
|
va[i] += atof(av[pos++]); |
598 |
|
n++; |
599 |
+ |
boxpos += boxstep; |
600 |
|
} |
601 |
|
if (n > 1) |
602 |
|
va[i] /= (double)n; |
605 |
|
if (va[i] > scale) |
606 |
|
scale = va[i]; |
607 |
|
} |
608 |
< |
if (scale == 0.) |
608 |
> |
if (scale <= FTINY) |
609 |
|
return(MG_EILL); |
610 |
|
scale = C_CMAXV / scale; |
611 |
|
clr->ssum = 0; /* convert to our spacing */ |