NAME
vwright - normalize a RADIANCE view, shift it to the right
SYNOPSIS
vwright [ view options ] distance
vwright [ view options ] name
DESCRIPTION
In the first form, vwright shifts a RADIANCE view the specified
distance to the right, putting out a complete set of view parameters in
a single line on the standard output. This utility is most often used
to compute a right-eyed view from a left-eye view for stereo imaging.
If no options are specified on the command line, vwright reads a view
from its standard input.
The distance given is in world coordinate units. A negative value
indicates a shift to the left rather than the right.
The second form substitutes a name prefix in place of the shift
distance, and produces constant assignments on the standard output
suitable for passing directly to rcalc(1). For a given prefix N, the
constant names are as follows:
Nt: view type (’v’==1,’l’==2,’a’==3,’h’==4,’c’==5,’s’==6)
Npx: view point x value
Npy: view point y value
Npz: view point z value
Ndx: view direction x value (normalized)
Ndy: view direction y value (normalized)
Ndz: view direction z value (normalized)
Nd: view focal distance
Nux: view up vector x value (normalized)
Nuy: view up vector y value (normalized)
Nuz: view up vector z value (normalized)
Nh: view horizontal size
Nv: view vertical size
Ns: view shift
Nl: view lift
No: view fore clipping distance
Na: view aft clipping distance
Nhx: derived horizontal image vector x value (normalized)
Nhy: derived horizontal image vector y value (normalized)
Nhz: derived horizontal image vector z value (normalized)
Nhn: derived horizontal image vector multiplier
Nvx: derived vertical image vector x value (normalized)
Nvy: derived vertical image vector y value (normalized)
Nvz: derived vertical image vector z value (normalized)
Nvn: derived vertical image vector multiplier
EXAMPLES
To start rpict(1) on a view .06 meters left of the view in the file
"right.vf":
rpict ‘vwright -.06 < right.vf‘ scene.oct > right.hdr &
To move the rad(1) view named "left" 2.5 inches to the right and render
from there:
rad -v "right ‘rad -n -s -V -v left examp.rif | vwright 2.5‘"
examp.rif &
To pass a view to rcalc for conversion to some other view:
rcalc -n -e ‘vwright orig < orig.vf‘ -f viewmod.cal -o view.fmt >
new.vf
AUTHOR
Greg Ward
SEE ALSO
pdfblur(1), rad(1), rcalc(1), rpict(1), rvu(1)