man/man1/rsensor.1

.\" RCSid "$Id$"
.TH RSENSOR 1 4/11/2008 RADIANCE
.SH NAME
rsensor - compute sensor signal from a RADIANCE scene
.SH SYNOPSIS
.B rsensor
[
.B -n nprocs
][
.B rtrace options
]
[
.B $EVAR
]
[
.B @file
]
{
[
.B -rd nrays
][
.B -dn nsrc
][
.B sensor_view
]
.B sensor_file ..
}
.B octree
.br
.B "rsensor [ options ] \-defaults"
.SH DESCRIPTION
.I Rsensor
traces rays outward from one or more specified illumination
sensors into the RADIANCE scene given by
.I octree,
sending the computed sensor value to the standard output.
(The octree may be given as the output of a command enclosed in quotes
and preceded by a `!'.)\0
In the second form, the default values
for the options (modified by those options present)
are printed with a brief explanation.
.PP
Options may be given on the command line and/or read from the
environment and/or read from a file.
A command argument beginning with a dollar sign ('$') is immediately
replaced by the contents of the given environment variable.
A command argument beginning with an at sign ('@') is immediately
replaced by the contents of the given file.
.PP
The sensor files themselves will be searched for in the path
locations specified by the
.I RAYPATH
environment variable, similar to other types of Radiance
auxiliary files.
If the sensor file path begins with '/', '.' or '~', no search
will take place.
Before each sensor file, a separate view may be specified.
In this case, the view origin and direction will correspond to
the position and orientation of the sensor, and the view up
vector will determine the zero azimuthal direction of the sensor.
(See
.I rpict\.1
for details on how to specify a view.)\0
The actual data contained in the sensor file corresponds to the
.I SPOT
tab-separated matrix specification, where the
column header has "degrees" in the leftmost column, followed
by evenly-spaced azimuthal angles.
Each row begins with the polar angle, and is followed by the
relative sensitivity values for each direction.
A low-resolution example of a sensor file is given below:
.sp
.nf
        degrees 0       90      180     270
        0       .02     .04     .02     .04
        45      .01     .02     .01     .02
        90      .001    .002    .001    .002
.fi
.sp
As well as different views, the number of samples may be changed between
sensors, where the
.I \-rd
option controls the number of ray samples sent at random, and the
.I \-dn
option controls the number of rays sent to light sources per sensor.
.PP
The
.I \-n
option may be used to specify multiple calculation processes on
systems with more than one CPU.
For additional options, consult the
.I rtrace\.1
man page.
The final
.I octree
argument must be given, as the octree cannot be read from the
standard input.
.SH EXAMPLES
To compute values for the same sensor with two different positions:
.IP "" .2i
rsensor -ab 2 -vf posA.vf mysens.dat -vf posB.vf mysens.dat scene.oct
.SH ENVIRONMENT
RAYPATH         the directories to check for auxiliary files.
.SH AUTHOR
Greg Ward for Architectural Energy Corporation
.SH "SEE ALSO"
oconv(1), rpict(1), rtcontrib(1), rtrace(1)
Revision:	1.1
Committed:	Tue Apr 15 00:14:22 2008 UTC (17 years, 6 months ago) by greg
Branch:	MAIN
Log Message:	Created man page for rsensor
#	User	Rev	Content
1	greg	1.1	.\" RCSid "$Id$"
2			.TH RSENSOR 1 4/11/2008 RADIANCE
3			.SH NAME
4			rsensor - compute sensor signal from a RADIANCE scene
5			.SH SYNOPSIS
6			.B rsensor
7			[
8			.B -n nprocs
9			][
10			.B rtrace options
11			]
12			[
13			.B $EVAR
14			]
15			[
16			.B @file
17			]
18			{
19			[
20			.B -rd nrays
21			][
22			.B -dn nsrc
23			][
24			.B sensor_view
25			]
26			.B sensor_file ..
27			}
28			.B octree
29			.br
30			.B "rsensor [ options ] \-defaults"
31			.SH DESCRIPTION
32			.I Rsensor
33			traces rays outward from one or more specified illumination
34			sensors into the RADIANCE scene given by
35			.I octree,
36			sending the computed sensor value to the standard output.
37			(The octree may be given as the output of a command enclosed in quotes
38			and preceded by a `!'.)\0
39			In the second form, the default values
40			for the options (modified by those options present)
41			are printed with a brief explanation.
42			.PP
43			Options may be given on the command line and/or read from the
44			environment and/or read from a file.
45			A command argument beginning with a dollar sign ('$') is immediately
46			replaced by the contents of the given environment variable.
47			A command argument beginning with an at sign ('@') is immediately
48			replaced by the contents of the given file.
49			.PP
50			The sensor files themselves will be searched for in the path
51			locations specified by the
52			.I RAYPATH
53			environment variable, similar to other types of Radiance
54			auxiliary files.
55			If the sensor file path begins with '/', '.' or '~', no search
56			will take place.
57			Before each sensor file, a separate view may be specified.
58			In this case, the view origin and direction will correspond to
59			the position and orientation of the sensor, and the view up
60			vector will determine the zero azimuthal direction of the sensor.
61			(See
62			.I rpict\.1
63			for details on how to specify a view.)\0
64			The actual data contained in the sensor file corresponds to the
65			.I SPOT
66			tab-separated matrix specification, where the
67			column header has "degrees" in the leftmost column, followed
68			by evenly-spaced azimuthal angles.
69			Each row begins with the polar angle, and is followed by the
70			relative sensitivity values for each direction.
71			A low-resolution example of a sensor file is given below:
72			.sp
73			.nf
74			degrees 0 90 180 270
75			0 .02 .04 .02 .04
76			45 .01 .02 .01 .02
77			90 .001 .002 .001 .002
78			.fi
79			.sp
80			As well as different views, the number of samples may be changed between
81			sensors, where the
82			.I \-rd
83			option controls the number of ray samples sent at random, and the
84			.I \-dn
85			option controls the number of rays sent to light sources per sensor.
86			.PP
87			The
88			.I \-n
89			option may be used to specify multiple calculation processes on
90			systems with more than one CPU.
91			For additional options, consult the
92			.I rtrace\.1
93			man page.
94			The final
95			.I octree
96			argument must be given, as the octree cannot be read from the
97			standard input.
98			.SH EXAMPLES
99			To compute values for the same sensor with two different positions:
100			.IP "" .2i
101			rsensor -ab 2 -vf posA.vf mysens.dat -vf posB.vf mysens.dat scene.oct
102			.SH ENVIRONMENT
103			RAYPATH the directories to check for auxiliary files.
104			.SH AUTHOR
105			Greg Ward for Architectural Energy Corporation
106			.SH "SEE ALSO"
107			oconv(1), rpict(1), rtcontrib(1), rtrace(1)