03-23-2018
Quote:
Originally Posted by
rbatte1
Does that help, or have I missed the point?
Robin
Hello Robin, that definitely helps. The original code is swift but I don't mind if code is bash, perl... I just need to see some code that works.
Thank you.
---------- Post updated at 03:34 PM ---------- Previous update was at 03:25 PM ----------
Quote:
Originally Posted by
RudiC
For an index not to exceed array boundaries the modulo operator has proven quite helpful.
Thanks for the input. I gave that a try but couldn't quite work out how to flip the counter to count down negative. I'm not that informed on how to flip the pointer.
---------- Post updated at 03:38 PM ---------- Previous update was at 03:34 PM ----------
Quote:
Originally Posted by
stomp
Remark
Don't use global variables like this in a bigger script!
Thank you.
Last edited by f77hack; 03-23-2018 at 05:34 PM..
Reason: typo
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LEARN ABOUT OPENSOLARIS
ppmtopgm
ppmtopgm(1) General Commands Manual ppmtopgm(1)
NAME
ppmtopgm - convert a portable pixmap into a portable graymap
SYNOPSIS
ppmtopgm [ppmfile]
DESCRIPTION
Reads a portable pixmap as input. Produces a portable graymap as output. The output is a "black and white" rendering of the original
image, as in a black and white photograph. The quantization formula used is .299 r + .587 g + .114 b.
Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any ppm program can
read pgm (and pbm ) files automatically. pgmtoppm is for colorizing a pgm file. Also, see ppmtorgb3 for a different way of converting
color to gray. And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate the original
colors, not necessarily a way that looks like a black and white photograph.
QUOTE
Cold-hearted orb that rules the night
Removes the colors from our sight
Red is gray, and yellow white
But we decide which is right
And which is a quantization error.
SEE ALSO
pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5)
AUTHOR
Copyright (C) 1989 by Jef Poskanzer.
10 April 2000 ppmtopgm(1)