vwright (1)

NAME

vwright - normalize a RADIANCE view, shift it to the right

SYNOPSIS

vwright distance
vwright name

DESCRIPTION

Vwright shifts a RADIANCE view from a picture or view file given on the standard input 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.

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)
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)
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.pic &

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