| 1 |
.\" RCSid "$Id: rcollate.1,v 1.7 2014/05/31 21:33:21 greg Exp $" |
| 2 |
.TH RCODE_IDENT 1 7/19/2019 RADIANCE |
| 3 |
.SH NAME |
| 4 |
rcode_ident - store identifiers in an indexed map and retrieve from same |
| 5 |
.SH SYNOPSIS |
| 6 |
.B rcode_ident |
| 7 |
[ |
| 8 |
.I "-8 | -16 | -24" |
| 9 |
][ |
| 10 |
.B \-h |
| 11 |
][ |
| 12 |
.B \-tS |
| 13 |
][ |
| 14 |
.B "-x xr -y yr" |
| 15 |
] |
| 16 |
[ |
| 17 |
input.txt |
| 18 |
[output.idx] |
| 19 |
] |
| 20 |
.br |
| 21 |
.B "rcode_ident -r" |
| 22 |
[ |
| 23 |
.B \-i |
| 24 |
][ |
| 25 |
.B \-u |
| 26 |
][ |
| 27 |
.B \-h |
| 28 |
][ |
| 29 |
.B \-H |
| 30 |
][ |
| 31 |
.B \-tS |
| 32 |
] |
| 33 |
[ |
| 34 |
input.idx |
| 35 |
[output.txt] |
| 36 |
] |
| 37 |
.SH DESCRIPTION |
| 38 |
.I Rcode_ident |
| 39 |
Takes a list of ASCII identifiers on the input and encodes them |
| 40 |
as a 16-bit index to a table appended to the output. |
| 41 |
This default index size can hold up to 65 thousand unique IDs, |
| 42 |
which is suitable for most applications. |
| 43 |
The |
| 44 |
.I \-8 |
| 45 |
option may be used to specify an 8-bit index, which saves space |
| 46 |
if 256 or fewer unique identifiers appear on the input. |
| 47 |
The |
| 48 |
.I \-24 |
| 49 |
option creates a 24-bit index can record over 16 million |
| 50 |
unique identifiers. |
| 51 |
.PP |
| 52 |
Identifiers are separated by newlines by default, but any single-character |
| 53 |
separator may be given with the |
| 54 |
.I \-tS |
| 55 |
option. |
| 56 |
Note there is no space between this option and its argument. |
| 57 |
Leading and trailing white space is eliminated from each identifier, |
| 58 |
and the maximum ID length is 255 characters. |
| 59 |
.PP |
| 60 |
Input is taken from the first named file, or standard input if no |
| 61 |
files are given. |
| 62 |
Output is sent to the second named file, or standard output if none. |
| 63 |
.PP |
| 64 |
The |
| 65 |
.I \-h |
| 66 |
option tells |
| 67 |
.I rcode_ident |
| 68 |
not to expect an information header on its input. |
| 69 |
The |
| 70 |
.I \-x |
| 71 |
and |
| 72 |
.I \-y |
| 73 |
options give the horizontal and vertical map dimensions, respectively. |
| 74 |
If these are not specified, then a resolution string must be |
| 75 |
included on the header, as produced by |
| 76 |
.I rtrace(1) |
| 77 |
when both resolutions are specified. |
| 78 |
.PP |
| 79 |
The second form applies the |
| 80 |
.I \-r |
| 81 |
option to read an indexed id file and produce the original |
| 82 |
identifiers for each pixel position on the output. |
| 83 |
The |
| 84 |
.I \-h |
| 85 |
and |
| 86 |
.I \-H |
| 87 |
options may be used to leave off the header and resolution |
| 88 |
string, respectively. |
| 89 |
The |
| 90 |
.I \-tS |
| 91 |
option specifies an alternate ID separator instead of the default newline. |
| 92 |
.PP |
| 93 |
When decoding, the |
| 94 |
.I \-i |
| 95 |
option tells |
| 96 |
.I rcode_ident |
| 97 |
to produce an identifier for each integer input pair specifying |
| 98 |
the horizontal and vertical coordinates of a particular pixel, |
| 99 |
where x is measured from 0 on the left and y from 0 at the bottom |
| 100 |
in the standard orientation. |
| 101 |
Note that |
| 102 |
.I \-i |
| 103 |
implies that an indexed ID file is explicitly given on the command |
| 104 |
line, since the pixel coordinates are read from the standard input. |
| 105 |
If the |
| 106 |
.I \-u |
| 107 |
option is also given, output will be flushed after each identifier |
| 108 |
.SH EXAMPLES |
| 109 |
To store modifier IDs out of rtrace: |
| 110 |
.IP "" .2i |
| 111 |
rtrace -ffa < rays.flt -x 512 -y 400 -om octree | rcode_ident > mods.idx |
| 112 |
.PP |
| 113 |
To query specific modifiers using ximage with the 't' command: |
| 114 |
.IP "" .2i |
| 115 |
ximage -op render.hdr | rcode_ident -i -r mods.idx |
| 116 |
.SH AUTHOR |
| 117 |
Greg Ward |
| 118 |
.SH "SEE ALSO" |
| 119 |
rcalc(1), rcode_depth(1), rcode_norm(1), rlam(1), rsplit(1), rtpict(1) |
