Script to generate terrain and render maps from Minecraft seeds.

mcgenerate.sh

#!/bin/bash

#set -e

USAGE="Usage: ${0} [options]

Uses mcexplore.py to explore a seed, and c10t to make a number of maps of that seed.

Requires:
  mcexplore.py (https://gist.github.com/854679)
  c10t (https://github.com/udoprog/c10t)
  advdef (http://advancemame.sourceforge.net/comp-readme.html)
  imagemagick (http://www.imagemagick.org/script/index.php)	

Notes:
  All of the required tools are assumed to be in your path

  Advdef and imagemagick are generally packaged for your distro.
  
  Advdef is only there to squeeze some large PNG files down, and
  you can just comment out the one line that uses it if you want
  to avoid the requirement.

Options:
  -h                Display this usage information
  -r SERVER_ROOT    Specify the folder that contains your Minecraft server (default: ~/minecraft/)
  -p SERVER_PORT    Set the port your server will run on while exploring (default: 25501)
  -f SEED_FILE      Specify a file containing one seed per line to explore sequentially
  -s SEED           Specify a seed (mutually exclusive with -f) (default: randomized)
  -l LENGTH         Set the length in regions of a side of the square map that's explored (default: 4)
  -o OUTPUT_PATH    Specify the path to store map images (creates subfolder per seed) (default: ~/mcmaps)
"

SERVER=~/minecraft
PORT="25501"	
SEED=""
SEEDFILE=""
LENGTH=4
OUTPUTPATH=~/minecraft/mcmaps/1.2.4

while getopts “hr:p:f:s:l:o:” OPTION
do
     case $OPTION in
         h) echo "$USAGE" ; exit 1 ;;
         r) SERVER=$OPTARG ;;
         p) PORT=$OPTARG ;;
         f) SEEDFILE=$OPTARG ;;
         s) SEED=$OPTARG ;;
         l) LENGTH=$OPTARG ;;
         o) OUTPUTPATH=$OPTARG ;;
     esac
done

randomseed() {
    dd if=/dev/urandom 2>&1 bs=32 count=1 | md5sum | cut -d " " -f 1
}

[ "${SEED}" != "" ] && [ "${SEEDFILE}" != "" ] && echo "Please only specify either the seed, or the seed file." && exit 1
[ "${SEEDFILE}" != "" ] && [ ! -f "${SEEDFILE}" ] && echo "${SEEDFILE} not found." && exit 1
[ "${SEEDFILE}" == "-" ] && SEEDFILE="/dev/stdin"
[ "${SEED}" == "" ] && [ "${SEEDFILE}" == "" ] && SEED=$(randomseed)

PROPERTIES="level-name=world
allow-nether=false
view-distance=10
spawn-monsters=false
online-mode=false
difficulty=1
gamemode=0
spawn-animals=false
max-players=20
server-ip=
pvp=true
level-seed=SEED
server-port=PORT
allow-flight=false
white-list=false
motd=A Minecraft Server"

genmap() {
    SEED=${1}
    OUTPUT="${OUTPUTPATH}/${SEED}"
    
    pushd "${SERVER}"
        [ -d world ] && rm -rf world
        echo "${PROPERTIES}" | sed "s|SEED|${SEED}|;s|PORT|${PORT}|" > server.properties
        echo "Initializing server [${SEED}]"
        echo 'stop' | java -jar minecraft_server.jar nogui
        echo "Exploring world [${SEED}]"
        ~/minecraft/mcexplore.py -r "${LENGTH}" "${LENGTH}"
    popd

    mkdir -p ${OUTPUT}

    cp ${SERVER}/world/level.dat ${OUTPUT}
    
    echo "Rendering maps [${SEED}]"
    echo  "mcmap "${SERVER}"/world "${OUTPUT}"/iso.png"
    
    mcmap ${SERVER}/world
    cp ${SERVER}/output.png ${OUTPUT}/iso.png
    advdef -z -4 ${SERVER}/output.png
    mv ${SERVER}/output.png ${OUTPUTPATH}/${SEED}.png
}


if [ "${SEEDFILE}" != "" ] ; then
    for SEED in $(cat "${SEEDFILE}") ; do
        genmap "${SEED}"
    done
else
    genmap "${SEED}"
fi

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