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


vwright distance
vwright name


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


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 -o view.fmt > new.vf


Greg Ward


pdfblur(1), rad(1), rcalc(1), rpict(1), rview(1)

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Page 1 (printed 7/17/96)

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