Getting MarioAI Python Agent Run on Ubuntu 12.04

A screenshot of DemoForwardJumpingAgent.py

It took me a couple hours trying to get this running, mostly because of the lack of documentation. I thought I should share it, so when other people Google it they don't loose time struggling:

1. Download MarioAI.zip from:

http://code.google.com/p/marioai/downloads/list

2. In your MarioAI directory open

src/amico/python/PyJava/Makefile.Linux

3. Edit the file to make it look like the following (I highlighted the changes I made)

CC = g++
MKDIR = mkdir

SRCDIR = src
BUILDDIR = build
CFLAGS = -shared -Wl,-soname,libAmiCoPyJava.so.1 -fPIC
INCLUDES = -I/usr/include/python2.7 -I/usr/lib/jvm/default-java/include -I/usr/lib/jvm/default-java/include/linux
LFLAGS = -L/usr/lib/jvm/default-java/jre/lib -L/usr/lib/jvm/default-java/jre/lib/i386/server
LIBS = -lpthread -lz -lutil
MAIN = $(BUILDDIR)/libAmiCoPyJava.so

all: $(MAIN)

$(MAIN):
    ${MKDIR} -p $(BUILDDIR)
    $(CC) $(CFLAGS) $(INCLUDES) $(LFLAGS) $(LIBS) -o $(MAIN) $(SRCDIR)/PythonCallsJava.cc -ljvm

.PHONY: clean

clean:
    rm -f $(MAIN)

# DO NOT DELETE THIS LINE

4. Now open a terminal in this directory (PyJava), and run make

5. This will generate libAmiCoPyJava.so under the PyJava/build directory

6. Copy libAmiCoPyJava.so into your_mario_ai_directory/bin/AmicoBuild/PyJava directory.

7. Open a terminal in this directory and add the jvm path in your LD_LIBRARY_PATH with the following command:

export LD_LIBRARY_PATH=/usr/lib/jvm/default-java/jre/lib/i386:/usr/lib/jvm/default-java/jre/lib/i386/client:$LD_LIBRARY_PATH

You can make this automatic if you add the line above at the end of you .bashrc file.

8. Now try

python DemoForwardJumpingAgent.py

9. That's it. You should see a small window popping-up with our little friend Mario jumping and running in it