152 |
|
rendering an image a piece at a time. |
153 |
|
A value of 1 means that the rendered image starts just to the right of |
154 |
|
the normal view. |
155 |
< |
A value of -1 would be to the left. |
155 |
> |
A value of \-1 would be to the left. |
156 |
|
Larger or fractional values are permitted as well. |
157 |
|
.TP |
158 |
|
.BI -vl \ val |
263 |
|
.I frac |
264 |
|
is too large. |
265 |
|
It is usually wise to turn off image sampling when using |
266 |
< |
direct jitter by setting -ps to 1. |
266 |
> |
direct jitter by setting \-ps to 1. |
267 |
|
.TP |
268 |
|
.BI -ds \ frac |
269 |
|
Set the direct sampling ratio to |
555 |
|
.I \-dv |
556 |
|
option (above) may be used to override this. |
557 |
|
.TP |
558 |
+ |
.BR \-u |
559 |
+ |
Boolean switch to control uncorrelated random sampling. |
560 |
+ |
When "off", a low-discrepancy sequence is used, which reduces |
561 |
+ |
variance but can result in a brushed appearance in specular highlights. |
562 |
+ |
When "on", pure Monte Carlo sampling is used in all calculations. |
563 |
+ |
.TP |
564 |
|
.BI -lr \ N |
565 |
|
Limit reflections to a maximum of |
566 |
|
.I N. |
774 |
|
A progress report writes the number of rays traced, the percentage |
775 |
|
completed, and the CPU usage to the standard error. |
776 |
|
Reports are given either automatically after the specified interval, |
777 |
< |
or when the process receives a continue (-CONT) signal (see |
777 |
> |
or when the process receives a continue (\-CONT) signal (see |
778 |
|
.I kill(1)). |
779 |
|
A value of zero turns automatic reporting off. |
780 |
|
.TP |
788 |
|
The default is to print warnings, so the first appearance of |
789 |
|
this option turns them off. |
790 |
|
.SH EXAMPLE |
791 |
< |
rpict -vp 10 5 3 -vd 1 -.5 0 scene.oct > scene.pic |
791 |
> |
rpict \-vp 10 5 3 \-vd 1 \-.5 0 scene.oct > scene.pic |
792 |
|
.PP |
793 |
< |
rpict -S 1 -o frame%02d.pic scene.oct < keyframes.vf |
793 |
> |
rpict \-S 1 \-o frame%02d.pic scene.oct < keyframes.vf |
794 |
|
.SH ENVIRONMENT |
795 |
|
RAYPATH the directories to check for auxiliary files. |
796 |
|
.SH FILES |