| 1 |
.\" RCSid "$Id: vwright.1,v 1.8 2009/06/14 00:33:15 greg Exp $" |
| 2 |
.TH VWRIGHT 1 8/29/96 RADIANCE |
| 3 |
.SH NAME |
| 4 |
vwright - normalize a RADIANCE view, shift it to the right |
| 5 |
.SH SYNOPSIS |
| 6 |
.B vwright |
| 7 |
.B "[ view options ]" |
| 8 |
.B distance |
| 9 |
.br |
| 10 |
.B vwright |
| 11 |
.B "[ view options ]" |
| 12 |
.B name |
| 13 |
.SH DESCRIPTION |
| 14 |
In the first form, |
| 15 |
.I vwright |
| 16 |
shifts a RADIANCE view |
| 17 |
the specified distance to the right, putting out a complete set of |
| 18 |
view parameters in a single line on the standard output. |
| 19 |
This utility is most often used to compute a right-eyed view from |
| 20 |
a left-eye view for stereo imaging. |
| 21 |
.PP |
| 22 |
If no options are specified on the command line, |
| 23 |
.I vwright |
| 24 |
reads a view from its standard input. |
| 25 |
.PP |
| 26 |
The |
| 27 |
.I distance |
| 28 |
given is in world coordinate units. |
| 29 |
A negative value indicates a shift to the left rather than the |
| 30 |
right. |
| 31 |
.PP |
| 32 |
The second form substitutes a name prefix in place of the shift |
| 33 |
distance, and produces constant assignments on the standard output |
| 34 |
suitable for passing directly to |
| 35 |
.I rcalc(1). |
| 36 |
For a given prefix |
| 37 |
.I N, |
| 38 |
the constant names are as follows: |
| 39 |
.sp |
| 40 |
.nf |
| 41 |
Nt: view type ('v'==1,'l'==2,'a'==3,'h'==4,'c'==5,'s'==6) |
| 42 |
Npx: view point x value |
| 43 |
Npy: view point y value |
| 44 |
Npz: view point z value |
| 45 |
Ndx: view direction x value (normalized) |
| 46 |
Ndy: view direction y value (normalized) |
| 47 |
Ndz: view direction z value (normalized) |
| 48 |
Nd: view focal distance |
| 49 |
Nux: view up vector x value (normalized) |
| 50 |
Nuy: view up vector y value (normalized) |
| 51 |
Nuz: view up vector z value (normalized) |
| 52 |
Nh: view horizontal size |
| 53 |
Nv: view vertical size |
| 54 |
Ns: view shift |
| 55 |
Nl: view lift |
| 56 |
No: view fore clipping distance |
| 57 |
Na: view aft clipping distance |
| 58 |
Nhx: derived horizontal image vector x value (normalized) |
| 59 |
Nhy: derived horizontal image vector y value (normalized) |
| 60 |
Nhz: derived horizontal image vector z value (normalized) |
| 61 |
Nhn: derived horizontal image vector multiplier |
| 62 |
Nvx: derived vertical image vector x value (normalized) |
| 63 |
Nvy: derived vertical image vector y value (normalized) |
| 64 |
Nvz: derived vertical image vector z value (normalized) |
| 65 |
Nvn: derived vertical image vector multiplier |
| 66 |
.fi |
| 67 |
.SH EXAMPLES |
| 68 |
To start |
| 69 |
.I rpict(1) |
| 70 |
on a view .06 meters left of the view in the file "right.vf": |
| 71 |
.IP "" .2i |
| 72 |
rpict `vwright -.06 < right.vf` scene.oct > right.hdr & |
| 73 |
.PP |
| 74 |
To move the |
| 75 |
.I rad(1) |
| 76 |
view named "left" 2.5 inches to the right |
| 77 |
and render from there: |
| 78 |
.IP "" .2i |
| 79 |
rad \-v "right `rad \-n \-s \-V \-v left examp.rif | vwright 2.5`" examp.rif & |
| 80 |
.PP |
| 81 |
To pass a view to |
| 82 |
.I rcalc |
| 83 |
for conversion to some other view: |
| 84 |
.IP "" .2i |
| 85 |
rcalc \-n \-e `vwright orig < orig.vf` \-f viewmod.cal \-o view.fmt > new.vf |
| 86 |
.SH AUTHOR |
| 87 |
Greg Ward |
| 88 |
.SH "SEE ALSO" |
| 89 |
pdfblur(1), rad(1), rcalc(1), rpict(1), rvu(1) |
