#!/bin/sh
# syntax: $0
# Christopher Alexander North-Keys
# Incept: 2002-11-06 06:30:27 CST (Nov Wed) 1036585827

# Capture of the originals
# xanim vmoon2.mpg
# i=0 ; while [ $i -le 29 ] ; do num=`printf '%02d' $i` ; echo ready for frame '#'$num: | tr -d '\012' ; read toss ; import -windowid 0x2e00002 -comment "moon phase #$num of [0-28]" phase-$num.png ; i=`expr $i + 1` ; done
# for f in *.png ; do convert $f `echo $f | sed 's/png$/gif/'` ; done

sizes="320 256 160 128 80 64 48 32 24 16"
sizes="24"
for size in $sizes ; do
  [ -d $size ] || mkdir $sizes
  cp Originals/index.html $size/
  ./MaskGen $size $size/mask.gif
  # use depth 16 to force not to use 1-bit gray, which confused convert.
  convert -depth 16 $size/mask.gif $size/mask.png
  for num in `range -2 0 29` ; do
    png=phase-$num.png
    gif=phase-$num.gif
    adjust='-gamma 1 -modulate 140'
    compop='Minus'
    echo generating "$size/phase-$num.{png,gif}"
    convert $adjust -geometry ${size}x${size} -depth 24 Originals/$png ${size}/tmp0.png
    convert $adjust -geometry ${size}x${size} Originals/$gif ${size}/tmp0.gif
    composite -compose $compop $size/tmp0.png $size/mask.png $size/tmp1.png
    composite -compose $compop $size/tmp0.gif $size/mask.gif $size/tmp1.gif
    convert -matte -transparent '#000000' ${size}/tmp1.png ${size}/$png
    convert -transparent '#000000' ${size}/tmp1.gif ${size}/$gif
   /bin/rm ${size}/tmp*.{gif,png}
  done
  ( cd ${size} && convert -loop 0 -delay 25 phase-[0-9][0-9].gif phases.gif )
done

#------------------------------------------------------------eof