[Radiance-general] how to pipe the output of pcompos as input for pflip

[Greg Ward]

You should get a usage error.  The 4.1 version of pflip needs the input file on the command line, so it can seek on it for the -v option.  While technically not necessary for the -h option by itself, this is how I wrote it figuring it was not worth the effort for the corner case of someone wanting on pflip -h to read from stdin.

I have modified the code and uploaded a new version that works in your scenario.  I will e-mail you the C file separately.

Cheers,
-Greg


> From: Ji Zhang <hope.zh at gmail.com>
> Date: May 17, 2012 9:33:44 AM PDT
> 
> Dear list, 
> 
> I can use two separate commands to crop and flip an .hdr image:
> 
> pcompos -x 800 -y 800 ./sky.hdr -100 0 > ./sky_clipped.hdr
> pflip -h ./sky_clipped.hdr > ./sky_flipped.hdr
> 
> 
> However, I don't seem to be able to "pipe" the output of pcompos as input for pflip using the following script:
> pcompos -x 800 -y 800 ./sky.hdr -100 0 | pflip -h > ./sky_flipped.hdr
> 
> I'm sure I missed something here, so please kindly advise!
> 
> Thanks a lot!
> 
> - Ji