vwright - normalize a RADIANCE view, shift it to the right
vwright [
view options ] distance
vwright [ view options ] name
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:
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Nt: |
view type (’v’==1,’l’==2,’a’==3,’h’==4,’c’==5,’s’==6) |
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Npx: |
view point x value |
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Npy: |
view point y value |
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Npz: |
view point z value |
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Ndx: |
view direction x value (normalized) |
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Ndy: |
view direction y value (normalized) |
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Ndz: |
view direction z value (normalized) |
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Nd: |
view focal distance |
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Nux: |
view up vector x value (normalized) |
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Nuy: |
view up vector y value (normalized) |
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Nuz: |
view up vector z value (normalized) |
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Nh: |
view horizontal size |
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Nv: |
view vertical size |
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Ns: |
view shift |
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Nl: |
view lift |
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No: |
view fore clipping distance |
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Na: |
view aft clipping distance |
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Nhx: |
derived horizontal image vector x value (normalized) |
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Nhy: |
derived horizontal image vector y value (normalized) |
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Nhz: |
derived horizontal image vector z value (normalized) |
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Nhn: |
derived horizontal image vector multiplier |
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Nvx: |
derived vertical image vector x value (normalized) |
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Nvy: |
derived vertical image vector y value (normalized) |
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Nvz: |
derived vertical image vector z value (normalized) |
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Nvn: |
derived vertical image vector multiplier |
To start rpict(1) on a view .06 meters left of the view in the file "right.vf":
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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:
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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:
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rcalc -n -e ‘vwright orig < orig.vf‘ -f viewmod.cal -o view.fmt > new.vf |
Greg Ward
pdfblur(1), rad(1), rcalc(1), rpict(1), rvu(1)