12-18-2009
Hi Patrick.
Quote:
Originally Posted by
patrick87
Hi scottn,
Thanks for your reminding
Can I ask you what is the meaning of "?" and "A[$1]:$0"?
It's really just shorthand for an if-then-else statement. Search for "The Conditional Statement" here
---------- Post updated at 05:24 AM ---------- Previous update was at 05:17 AM ----------
Quote:
Originally Posted by
patrick87
Can I ask you how we can determine to use awk, nawk, or gawk?
I use awk because it is generally a copy of or link to nawk or gawk, so I don't need to know or think about which one is installed.
i.e. On AIX it's a link to nawk, on Linux awk and nawk are probably both linked to gawk.
The only exception is on Solaris, where you should use nawk, /usr/xpg4/bin/awk or gawk (if it's available) instead of /usr/bin/awk.
_ is just a cool name to use for a variable :-)
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LEARN ABOUT DEBIAN
stereo3d
STEREO3D(1) General Commands Manual STEREO3D(1)
NAME
stereo3d - render a Raster3D scene as a side-by-side stereo pair
SYNOPSIS
stereo3d [options] [-png [outfile.png ]] < infile.r3d > outfile.png
stereo3d [options] -tiff [outfile.tiff] < infile.r3d > outfile.tiff
stereo3d is a shell script that renders a single Raster3D input file as a side-by-side stereo pair.
stereo3d uses the Raster3D utilities normal3d and render, and the ImageMagick image processing package. Intermediate scratch files are
created in directory TMPDIR, if defined, otherwise in /usr/tmp.
The right eye and left eye views are separately rendered, optionally given black borders, and merged to form a single side-by-side stereo
pair.
Input is from stdin, output is to stdout unless a filename is given as an argument to the -png or -tiff options.
EXAMPLES
If the following line would render a single image:
render -tiff single.tiff < input.r3d
then the following line would render the same scene as a stereo pair instead:
stereo3d -tiff stereo.tiff < input.r3d
OPTIONS
The options below are specific to stereo3d. All other options, e.g. -labels or -gamma 1.2 are passed through to the render program.
-angsep
By default the stereo effect is generated by a shear operation. The -angsep option creates stereo by using angular separation instead.
Neither option is perfect: the default handles shadows badly, and the -angsep option blurs specular highlights.
-border
By default the left and right images are placed next to each other with no intervening space and no frame around them. The -border option
requests a 4 pixel wide black border separating and surrounding the component images.
SOURCE
web URL:
http://www.bmsc.washington.edu/raster3d/raster3d.html
contact:
Ethan A Merritt
University of Washington, Seattle WA 98195
merritt@u.washington.edu
SEE ALSO
normal3d(l), render(l), raster3d(l)
AUTHORS
Ethan A Merritt.
Raster3D 19 Dec 2010 STEREO3D(1)