drinkOverlay.sh

#!/bin/bash

# USAGE:
# ./drinkOverlay /path/to/lotr/assets /path/to/output/dir
#      $0              $1                    $2

cd $1
cd lotr/textures/items

# Make sure we have the overlays
if [ -f $2/Overlays ]; then
  echo "You need the overlays!"
  exit 1
fi

# Get all of our output folders in order
if [ -f $2 ]; then
  : #Do nothing...
  mkdir $2
  mkdir $2/Vessels
  mkdir $2/Liquid
  mkdir $2/LiquidBackgrounds
else
  mkdir $2/Vessels
  mkdir $2/Liquid
  mkdir $2/LiquidBackgrounds
fi

# Grab the vessel and liquid images
allVessels=(drink_*.png)
for infile in ${allVessels[@]}; do
  cp $infile $2/Vessels
done

allLiquids=(mug*_liquid.png)
for infile in ${allLiquids[@]}; do
  cp $infile $2/Liquid
done

cd $2

# Remove the vessel pinkness
allVessels=(Vessels/drink_*.png)
for infile in ${allVessels[@]}; do
  convert $infile -transparent 'rgba(255,0,255,100)' $infile
done

# Overlay the overlays onto the liquids, and then remove the pink
for overlay in Overlays/*; do
  overlayType=${overlay#Overlays/}
  overlayType=${overlayType%Overlay.png}
  for liquid in Liquid/*; do
    liquidType=${liquid#Liquid/mug}
    liquidType=${liquidType%_liquid.png}
    output="LiquidBackgrounds/$liquidType$overlayType.png"
    composite -gravity center -compose Over $overlay $liquid $output
    convert $output -transparent 'rgba(240,0,255,100)' $output
  done
done