cca13@seq1.keele.ac.uk (G.D. Pratt) (02/06/91)
Can anyone tell me how to tell the pnmrotate command, in the new beta release of PBMPLUS, how to rotate the image by a negative angle since it appears to take the "-" as the flag symbol as in:- pnmrotate -10 < turing.pgm > fred.pgm usage: pnmrotate [-noantialias] <angle> [pnmfile] many thanks, gerry -- gerry pratt -- workstation support -- university of keele email: gerry@seq1.keele.ac.uk * tel: 0782 621111 x 3290 "these opinions are mine, mine, mine....ALL MINE I TELL YOU!"
jef@well.sf.ca.us (Jef Poskanzer) (02/07/91)
In the referenced message, cca13@seq1.keele.ac.uk (G.D. Pratt) wrote: }Can anyone tell me how to tell the pnmrotate command, in the new }beta release of PBMPLUS, how to rotate the image by a negative angle }since it appears to take the "-" as the flag symbol Yes, that's a bug, introduced when I added the -noantialias flag. pnmshear has the same problem. Until the next patch comes out you can work around it using pnmflip. For example, to do a -20 rotate, you could instead do pnmflip -lr | pnmrotate 20 | pnmflip -lr. --- Jef Jef Poskanzer jef@well.sf.ca.us {apple, ucbvax, hplabs}!well!jef "If you give me six lines written by the most honest man, I will find something in them to hang him." -- Cardinal de Richelieu
rslau@tarazed.usc.edu (Robert Lau) (02/07/91)
In article <865@keele.keele.ac.uk> cca13@seq1.keele.ac.uk (G.D. Pratt) writes: Can anyone tell me how to tell the pnmrotate command, in the new beta release of PBMPLUS, how to rotate the image by a negative angle since it appears to take the "-" as the flag symbol as in:- pnmrotate -10 < turing.pgm > fred.pgm usage: pnmrotate [-noantialias] <angle> [pnmfile] from the source: if ( argn < argc && argv[argn][0] == '-' && argv[argn][1] != '\0' ) { if ( pm_keymatch( argv[argn], "-antialias", 2 ) ) antialias = 1; else if ( pm_keymatch( argv[argn], "-noantialias", 2 ) ) antialias = 0; else pm_usage( usage ); ++argn; } if ( argn == argc ) pm_usage( usage ); if ( sscanf( argv[argn], "%f", &fangle ) != 1 ) pm_usage( usage ); It only checks the first flagged option, so if you want a negative angle, you'll need to add a -antialias (yes, it's the default but...) followed by the negative angle: pnmrotate -antialias -45 < {file}.ppm > {file}.ppm.rot Bug? nah :) -robert -- Robert Lau 213.740.2866 Unix Systems Internet: rslau@usc.edu University Computing Services UUCP: ...!uunet!usc!rslau University of Southern California Bitnet: RSLAU@GAMERA
mcastle@mcs213f.cs.umr.edu (Mike Castle {Nexus}) (02/07/91)
I've only used pbmplus once, so I'm not sure about it's limitations, but,
why wouldn't
pnmrotate 340 .....
work as well as
pnmrotate -20
Would it result in more work, of does it have to be <= 180 ???
Just curious....
--
Mike Castle (Nexus) S087891@UMRVMA.UMR.EDU (preferred) | RN ate my
mcastle@mcs213k.cs.umr.edu (unix mail-YEACH!)| .newsrc!
Life is like a clock: You can work constantly, and be right | I am not
all the time, or not work at all, and be right twice a day. | happy :-<