| 9 |
|
][ |
| 10 |
|
.B \-V |
| 11 |
|
][ |
| 12 |
+ |
.B "\-t secs" |
| 13 |
+ |
][ |
| 14 |
|
.B "\-c count" |
| 15 |
|
][ |
| 16 |
|
.B \-fo |
| 45 |
|
.B octree |
| 46 |
|
.br |
| 47 |
|
.B "rcontrib [ options ] \-defaults" |
| 48 |
+ |
.br |
| 49 |
+ |
.B "rcontrib \-features [feat1 ..]" |
| 50 |
|
.SH DESCRIPTION |
| 51 |
|
.I Rcontrib |
| 52 |
|
computes ray coefficients |
| 123 |
|
.I \-c |
| 124 |
|
set to zero. |
| 125 |
|
.PP |
| 126 |
+ |
Output flushing at fixed intervals may be enabled with the |
| 127 |
+ |
.I \-x |
| 128 |
+ |
option, which specifies the number of records |
| 129 |
+ |
(-c accumulations) before each flush. |
| 130 |
+ |
If the |
| 131 |
+ |
.I \-y |
| 132 |
+ |
option is also set, then periodic flushing is disabled and the |
| 133 |
+ |
output size for an RGB image is the taken from the x and y dimensions. |
| 134 |
+ |
In lieu of periodic flushing, a flush may be forced as mentioned above |
| 135 |
+ |
by sending a sample with a zero direction vector, although you |
| 136 |
+ |
must still send a full record of rays before output occurs. |
| 137 |
+ |
.PP |
| 138 |
+ |
If progress reports are desired, the |
| 139 |
+ |
.I \-t |
| 140 |
+ |
option specifies a time interval in seconds for reports sent to |
| 141 |
+ |
standard error. |
| 142 |
+ |
This requires that the number of input samples is known, meaning a |
| 143 |
+ |
.I \-y |
| 144 |
+ |
parameter has been specified. |
| 145 |
+ |
.PP |
| 146 |
|
The output of |
| 147 |
|
.I rcontrib |
| 148 |
|
has many potential uses. |
| 208 |
|
.I \-o |
| 209 |
|
options to the left of each |
| 210 |
|
.I \-m |
| 211 |
< |
setting are the ones used for that modifier. |
| 211 |
> |
name are the ones used for that modifier. |
| 212 |
> |
Any |
| 213 |
> |
.I \-cs |
| 214 |
> |
option changing the number of spectral color |
| 215 |
> |
samples must appear before the first modifier. |
| 216 |
|
The ordering of other options is unimportant, except for |
| 217 |
|
.I \-x |
| 218 |
|
and |
| 330 |
|
is clamped accordingly and a warning is issued. |
| 331 |
|
.SH EXAMPLES |
| 332 |
|
To compute the proportional contributions from sources modified |
| 333 |
< |
by "light1" vs. "light2" on a set of illuminance values: |
| 333 |
> |
by "light1" vs. "light2" on a set of irradiance values: |
| 334 |
|
.IP "" .2i |
| 335 |
|
rcontrib \-I+ @render.opt \-o c_%s.dat \-m light1 \-m light2 scene.oct < test.dat |
| 336 |
|
.PP |
| 346 |
|
.IP "" .2i |
| 347 |
|
pcomb \-c 100 90 75 c_light1.hdr \-c 50 55 57 c_light2.hdr > combined.hdr |
| 348 |
|
.PP |
| 349 |
< |
To compute an array of illuminance contributions according to a Tregenza sky: |
| 349 |
> |
To compute an array of irradiance contributions according to a Tregenza sky: |
| 350 |
|
.IP "" .2i |
| 351 |
|
rcontrib \-I+ \-f tregenza.cal \-b tbin \-bn Ntbins \-o sky.dat \-m skyglow |
| 352 |
|
\-b 0 \-o ground.dat \-m groundglow @render.opt scene.oct < test.dat |
| 367 |
|
Greg Ward |
| 368 |
|
.SH "SEE ALSO" |
| 369 |
|
cnt(1), genklemsamp(1), getinfo(1), mkpmap(1), pcomb(1), pfilt(1), |
| 370 |
< |
ra_rgbe(1), rcalc(1), rfluxmtx(1), rmtxop(1), rpict(1), rsensor(1), |
| 371 |
< |
rtrace(1), total(1), vwrays(1), ximage(1) |
| 370 |
> |
ra_rgbe(1), rcalc(1), rcomb(1), rfluxmtx(1), rmtxop(1), rpict(1), |
| 371 |
> |
rsensor(1), rtrace(1), total(1), vwrays(1), ximage(1) |
| 372 |
|
|
