| 18 |
|
] |
| 19 |
|
.br |
| 20 |
|
.B "rpict [ options ] \-defaults" |
| 21 |
+ |
.br |
| 22 |
+ |
.B "rpict \-features [feat1 ..]" |
| 23 |
|
.SH DESCRIPTION |
| 24 |
|
.I Rpict |
| 25 |
|
generates a picture from the RADIANCE scene given in |
| 43 |
|
for the options (modified by those options present) |
| 44 |
|
are printed with a brief explanation. |
| 45 |
|
.PP |
| 46 |
+ |
In the third form, a list of supported features is sent |
| 47 |
+ |
to the standard output, one per line. |
| 48 |
+ |
If additional arguments follow, they are checked for presence in |
| 49 |
+ |
this list. |
| 50 |
+ |
If a feature includes subfeatures, these may be checked as well by |
| 51 |
+ |
specifying: |
| 52 |
+ |
.nf |
| 53 |
+ |
|
| 54 |
+ |
rpict -features FeatName=subfeat1,subfeat2 |
| 55 |
+ |
|
| 56 |
+ |
.fi |
| 57 |
+ |
If any named feature or subfeature is missing, an error is |
| 58 |
+ |
reported and the program returns an error status. |
| 59 |
+ |
If all of the named features are present, a zero status is returned. |
| 60 |
+ |
.PP |
| 61 |
|
Most options are followed by one or more arguments, which must be |
| 62 |
|
separated from the option and each other by white space. |
| 63 |
|
The exceptions to this rule are the |
| 698 |
|
continue rays with a probability equal to the ray weight |
| 699 |
|
divided by the given |
| 700 |
|
.I frac. |
| 701 |
+ |
.TP |
| 702 |
+ |
.BI -cs \ Ns |
| 703 |
+ |
Use |
| 704 |
+ |
.I Ns |
| 705 |
+ |
bands for spectral sampling rather than the default RGB calculation space. |
| 706 |
+ |
The maximum setting is controlled by the compiler macro MAXCSAMP, and |
| 707 |
+ |
defaults to 24. |
| 708 |
+ |
Larger values for Ns will be reduced to MAXCSAMP. |
| 709 |
+ |
.TP |
| 710 |
+ |
.BI -cw " nmA nmB" |
| 711 |
+ |
Set extrema to the given wavelengths for spectral sampling. |
| 712 |
+ |
The default is 380 and 780 nanometers. |
| 713 |
+ |
The order specified does not matter. |
| 714 |
+ |
.TP |
| 715 |
+ |
.BI -pc " xr yr xg yg xb yb xw yw" |
| 716 |
+ |
Use the specified chromaticity pairs for output primaries and white |
| 717 |
+ |
point rather than the standard RGB color space. |
| 718 |
+ |
.TP |
| 719 |
+ |
.BR \-pRGB |
| 720 |
+ |
Output standard RGB values (the default). |
| 721 |
+ |
.TP |
| 722 |
+ |
.BR \-pXYZ |
| 723 |
+ |
Output standard CIE XYZ tristimulus values rather than RGB. |
| 724 |
|
.TP |
| 725 |
|
.BI -S \ seqstart |
| 726 |
|
Instead of generating a single picture based only on the view |
