16 |
|
* xorg yorg zorg xdir ydir zdir |
17 |
|
* |
18 |
|
* The direction need not be normalized. Output is flexible. |
19 |
+ |
* If the direction vector is (0,0,0), then the output is flushed. |
20 |
|
* All values default to ascii representation of real |
21 |
|
* numbers. Binary representations can be selected |
22 |
|
* with '-ff' for float or '-fd' for double. By default, |
95 |
|
while (getvec(orig, inform, fp) == 0 && |
96 |
|
getvec(direc, inform, fp) == 0) { |
97 |
|
|
98 |
< |
if (normalize(direc) == 0.0) |
99 |
< |
error(USER, "zero direction vector"); |
98 |
> |
if (normalize(direc) == 0.0) { /* zero ==> flush */ |
99 |
> |
fflush(stdout); |
100 |
> |
continue; |
101 |
> |
} |
102 |
|
/* compute and print */ |
103 |
|
if (outvals[0] == 'i') |
104 |
|
irrad(orig, direc); |
105 |
|
else |
106 |
|
radiance(orig, direc); |
107 |
< |
/* flush if requested */ |
107 |
> |
/* flush if time */ |
108 |
|
if (--nextflush == 0) { |
109 |
|
fflush(stdout); |
110 |
|
nextflush = hresolu; |