#!/bin/bash # # Developed by Fred Weinhaus 12/16/2016 .......... revised 12/16/2016 # # ------------------------------------------------------------------------------ # # Licensing: # # Copyright © Fred Weinhaus # # My scripts are available free of charge for non-commercial use, ONLY. # # For use of my scripts in commercial (for-profit) environments or # non-free applications, please contact me (Fred Weinhaus) for # licensing arrangements. My email address is fmw at alink dot net. # # If you: 1) redistribute, 2) incorporate any of these scripts into other # free applications or 3) reprogram them in another scripting language, # then you must contact me for permission, especially if the result might # be used in a commercial or for-profit environment. # # My scripts are also subject, in a subordinate manner, to the ImageMagick # license, which can be found at: http://www.imagemagick.org/script/license.php # # ------------------------------------------------------------------------------ # #### # # USAGE: hexagons [-d dimension] [-c cellsize] [-e edgecolor] [-t thickness] # infile outfile # USAGE: hexagons [-h or -help] # # OPTIONS: # # -d dimension square size of the output image; default is the # minimum dimension of the input # -c cellsize square size of hexagon cellsize; pixels or percent with # % symbol included; default is 1/3 of dimension; the # minumum size is the equivalent of 50 pixels and the # maximum size is dimension (100%) # -e edgecolor edge color assigned to border of hexagons; any valid # IM color is allowed; default is no edge color # -t thickness thickness of edges in pixels; integer>=0; default=0 # ### # # NAME: HEXAGONS # # PURPOSE: To create a hexagonal grid of the randomly rotated input image. # # DESCRIPTION: HEXAGONS creates a hexagonal grid of scaled and randomly rotated # copies of the input image. The input image will be center cropped to its # minimum dimension for use in the hexagons. # # OPTIONS: # # -d dimension ... DIMENSION is the square size of the output image. The # default is the minimum dimension of the input. # # -c cellsize ... CELLSIZE is the square size of the hexagon cells. Units # are either pixels or percent with % symbol included. The default is 1/3 of # the dimension value. The minumum allowed size is the equivalent of 50 pixels # and the maximum size is the dimension argument (i.e. 100%). # # -e edgecolor ... EDGECOLOR is the color assigned to edges (border) of the # hexagons. Any valid IM color is allowed. The default is no edge color. # # -t thickness ... THICKNESS of edges in pixels. Values are integers>=0. # The default=0 (no edge color). # # CAVEAT: No guarantee that this script will work on all platforms, # nor that trapping of inconsistent parameters is complete and # foolproof. Use At Your Own Risk. # ###### # # set default values dim="" cellsize="" edgecolor="" thickness=0 # set directory for temporary files # tmpdir="/tmp" tmpdir="." dir="$tmpdir/HEXAGONS.$$" mkdir "$dir" || errMsg "--- FAILED TO CREATE TEMPORARY FILE DIRECTORY ---" trap "rm -rf $dir; exit 0" 0 trap "rm -rf $dir; exit 1" 1 2 3 15 # set up functions to report Usage and Usage with Description PROGNAME=`type $0 | awk '{print $3}'` # search for executable on path PROGDIR=`dirname $PROGNAME` # extract directory of program PROGNAME=`basename $PROGNAME` # base name of program usage1() { echo >&2 "" echo >&2 "$PROGNAME:" "$@" sed >&2 -e '1,/^####/d; /^###/g; /^#/!q; s/^#//; s/^ //; 4,$p' "$PROGDIR/$PROGNAME" } usage2() { echo >&2 "" echo >&2 "$PROGNAME:" "$@" sed >&2 -e '1,/^####/d; /^######/g; /^#/!q; s/^#*//; s/^ //; 4,$p' "$PROGDIR/$PROGNAME" } # function to report error messages errMsg() { echo "" echo $1 echo "" usage1 exit 1 } # function to test for minus at start of value of second part of option 1 or 2 checkMinus() { test=`echo "$1" | grep -c '^-.*$'` # returns 1 if match; 0 otherwise [ $test -eq 1 ] && errMsg "$errorMsg" } # test for correct number of arguments and get values if [ $# -eq 0 ] then # help information echo "" usage2 exit 0 elif [ $# -gt 10 ] then errMsg "--- TOO MANY ARGUMENTS WERE PROVIDED ---" else while [ $# -gt 0 ] do # get parameter values case "$1" in -h|help) # help information echo "" usage2 exit 0 ;; -d) # dimension shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID DIMENSION SPECIFICATION ---" checkMinus "$1" dimension=`expr "$1" : '\([0-9]*\)'` [ "$dimension" = "" ] && errMsg "--- DIMENSION=$dimension MUST BE A NON-NEGATIVE INTEGER (with no sign) ---" ;; -c) # cellsize shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID CELLSIZE SPECIFICATION ---" checkMinus "$1" cellsize=`expr "$1" : '\([0-9]*%*\)'` [ "$cellsize" = "" ] && errMsg "--- CELLSIZE=$cellsize MUST BE A NON-NEGATIVE INTEGER (with no sign) WITH OR WITHOUT TRAILING % SYMBOL---" ;; -e) # edgecolor shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID EDGECOLOR SPECIFICATION ---" checkMinus "$1" edgecolor="$1" ;; -t) # thickness shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID THICKNESS SPECIFICATION ---" checkMinus "$1" thickness=`expr "$1" : '\([0-9]*\)'` [ "$thickness" = "" ] && errMsg "--- THICKNESS=$thickness MUST BE A NON-NEGATIVE INTEGER (with no sign) ---" ;; -) # STDIN and end of arguments break ;; -*) # any other - argument errMsg "--- UNKNOWN OPTION ---" ;; *) # end of arguments break ;; esac shift # next option done # # get infile and outfile infile="$1" outfile="$2" fi # test that infile provided [ "$infile" = "" ] && errMsg "--- NO INPUT FILE SPECIFIED ---" # test that outfile provided [ "$outfile" = "" ] && errMsg "--- NO OUTPUT FILE SPECIFIED ---" # get dim if not provided if [ "$dim" = "" ]; then dim=`convert "$infile" -format "%[fx:min(w,h)]" info:` fi # read the input image into the temporary cached image and test if valid convert -quiet -regard-warnings "$infile" -gravity center -crop ${dim}x${dim}+0+0 +repage $dir/tmpI.mpc || errMsg "--- FILE $infile DOES NOT EXIST OR IS NOT AN ORDINARY FILE, NOT READABLE OR HAS ZERO size ---" # get cellsize if not provided if [ "$cellsize" = "" ]; then cellsize=`convert xc: -format "%[fx:round($dim/3)]" info:` else test=`echo "$cellsize" | grep "%"` if [ "$test" != "" ]; then #convert from percent to pixels cellsize=`echo "$cellsize" | sed 's/%*//g'` cellsize=`convert xc: -format "%[fx:round($cellsize*$dim/100)]" info:` fi fi [ $cellsize -lt 50 -o $cellsize -gt $dim ] && errMsg "--- INVALID CELLSIZE ---" #echo "dim=$dim; cellsize=$cellsize;" # create array of hexagons to form regularly tiled pattern dim1=`convert xc: -format "%[fx:($dim-1)+0.5*$cellsize]" info:` # if cellsize cellsize is 1, then hexagon width = 1 and cellsize = 0.5, height = 0.866 # so horizontal spacing = 1.5 and vertical spacing = 0.433 hexArr=(`awk -v cellsize="$cellsize" -v dim1="$dim1" ' BEGIN { j=0; y=0; while ( y < dim1 ) { if (j%2==0) {x=0.75*cellsize;} else {x=0;} while (x < dim1 ) { if (x>dim1) {x=dim1;} if (y>dim1) {y=dim1;} print "+"(x-0.5*cellsize)"+"(y-0.5*cellsize); x=x+1.5*cellsize; } j++; y=y+0.433*cellsize; } }'`) num=${#hexArr[*]} #echo $num #echo "${hexArr[*]}" # create array of random angles rotArr=(`for ((i=0; i