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.\" RCSid "$Id: vwright.1,v 1.7 2008/11/10 19:08:17 greg Exp $" |
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.TH VWRIGHT 1 8/29/96 RADIANCE |
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.SH NAME |
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vwright - normalize a RADIANCE view, shift it to the right |
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.SH SYNOPSIS |
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.B vwright |
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.B "[ view options ]" |
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.B distance |
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.br |
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.B vwright |
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.B name |
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.SH DESCRIPTION |
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.I Vwright |
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shifts a RADIANCE view |
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the specified distance to the right, putting out a complete set of |
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view parameters in a single line on the standard output. |
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This utility is most often used to compute a right-eyed view from |
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a left-eye view for stereo imaging. |
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.PP |
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If no options are specified on the command line, |
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.I vwright |
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reads a view from its standard input. |
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.PP |
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The |
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.I distance |
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given is in world coordinate units. |
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A negative value indicates a shift to the left rather than the |
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right. |
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.PP |
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The second form substitutes a name prefix in place of the shift |
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distance, and produces constant assignments on the standard output |
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suitable for passing directly to |
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.I rcalc(1). |
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For a given prefix |
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.I N, |
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the constant names are as follows: |
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.sp |
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.nf |
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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 |
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.fi |
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.SH EXAMPLES |
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To start |
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.I rpict(1) |
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on a view .06 meters left of the view in the file "right.vf": |
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.IP "" .2i |
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rpict `vwright -.06 < right.vf` scene.oct > right.hdr & |
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.PP |
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To move the |
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.I rad(1) |
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view named "left" 2.5 inches to the right |
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and render from there: |
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.IP "" .2i |
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rad \-v "right `rad \-n \-s \-V \-v left examp.rif | vwright 2.5`" examp.rif & |
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.PP |
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To pass a view to |
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.I rcalc |
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for conversion to some other view: |
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.IP "" .2i |
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rcalc \-n \-e `vwright orig < orig.vf` \-f viewmod.cal \-o view.fmt > new.vf |
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.SH AUTHOR |
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Greg Ward |
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.SH "SEE ALSO" |
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pdfblur(1), rad(1), rcalc(1), rpict(1), rvu(1) |
