Game of Drones: A NeurIPS 2019 Competition

Quickstart

• Website
• Register
• Competition guidelines
• Linux and Windows Binaries
• Python API, airsimneurips PyPI package

Downloading and running AirSim Binaries

Downloading

• Qualifier binaries and environments (v1.0)

  • tl;dr:
    • [Linux] Use the download_qualification_binaries.sh script
  • Long version:
    • Download the v1.0 Linux or Windows AirSim.zip, and unzip it.
    • Download your qualifier environments (shipped in pakfiles) - Qual_Tier_1_and_Tier_3.pak and Qual_Tier_2.pak.
    • Move the environment pakfiles into AirSim/AirSimExe/Content/Paks.
    • Download and move the settings.json file to ~/Documents/AirSim/settings.json.

• Training binaries and environments (v0.3):

  • tl;dr:
    • [Linux] Use the download_training_binaries.sh script
  • Long version:
    • Download the v0.3 Linux or Windows AirSim.zip, and unzip it.
    • Download training environments (shipped in pakfiles) - Soccer_Field.pak, ZhangJiaJie.pak, and Building99.pak.
    • Move the environment pakfiles into AirSim/AirSimExe/Content/Paks.
    • Download and move the settings.json file to ~/Documents/AirSim/settings.json.

Notes:

• Source code (zip) or Source code (tar.gz) might not be up-to-date with the master branch of this repository. It can be lagging by n commits to master since this release, specified on the released page.
  For the code on this repository, it's best to just git clone.

• List of disabled APIs in qualification binaries: The following APIs on the server side in the qualification binaries. You should see an error message pop up in the terminal message when you call these. They do work in the training binaries:

  • simSetObjectPose
  • simSetVehiclePose
  • simSetObjectScale
  • simGetObjectScale
  • simSetSegmentationObjectID
  • simGetSegmentationObjectID
  • simPause
  • simContinueForTime

Running

• Linux

  • Open a terminal window, cd to AirSim_Training/ or AirSim_Qualification directory, and enter the following command:

     ./AirSimExe.sh -windowed -opengl4
    

• Windows

  • Navigate to the AirSim/ directory, and double-click run.bat (or AirSimExe.exe -windowed)

Docker

• Prerequistes:

  • Install docker-ce.
  • Complete the desired post-installation steps for linux after installing docker.
    At the minimum, the page tells you how torun docker without root, and other useful setup options.
  • Install nvidia-docker2.

• Dockerfile:
  We provide a sample dockerfile you can modify.
  It downloads the training and qualification binaries automatically, and installs the python client.
  By default, it uses Ubuntu 18.04 and CUDA 10.0 with OpenGL, and is build on top of nvidia/cudagl:10.0-devel-ubuntu18.04.
  This can be changed of course, as explained in the following section.

• Building the docker image:
  You can use build_docker_image.py to build the dockerfile above (or your own custom one)
  Usage (with default arguments)

   cd docker/;
   python3 build_docker_image.py \
   	--dockerfile Dockerfile \
   	--base_image nvidia/cudagl:10.0-devel-ubuntu18.04 \
   	-- target_image airsim_neurips:10.0-devel-ubuntu18.04

• Running the docker image: See docker/run_docker_image.sh to run the docker image:
  Usage

  • for running default image, training binaries, in windowed mode:
    $ ./run_docker_image.sh "" training
  • for running default image, qualification binaries, in windowed mode:
    $ ./run_docker_image.sh "" qualification
  • for running default image, training binaries, in headless mode:
    $ ./run_docker_image.sh "" training headless
  • for running default image, qualification binaries, in headless mode:
    $ ./run_docker_image.sh "" qualification headless
  • for running a custom image in windowed mode, pass in you image name and tag:
    $ ./run_docker_image.sh DOCKER_IMAGE_NAME:TAG
  • for running a custom image in headless mode, pass in you image name and tag, followed by "headless":
    $ ./run_docker_image.sh DOCKER_IMAGE_NAME:TAG headless

AirSim API

• To control your drone and get information from the environment, you will need the airsimneurips API, which is accessible via Python.
  We recommend you used python >= 3.6. Python 2.7 will go out of support soon

• To install the Python API, do a :

   pip install airsimneurips
  

• The API is documented at airsimneurips API doc

• Resources

  • Going through both open and closed issues in this repository might answer some of your questions. The search bar on top left can prove useful.
  • AirSim upstream API and examples can also be of use. However, please note that the main AirSim repo's API is not used in the competition (there's some overlap and some differences), however is a good learning resource.

Submitting Results and Leaderboard

• For the qualification round, we have one race track for each tier. The relevant binaries (v1.0) are available for linux and windows

  • Tier 1: This is in the Soccer Field environment.
    THe race track is in the Qual_Tier_1_and_Tier_3.pak pakfile
  • Tier 2: This is in the ZhangJiaJie environment.
    The race track is in the Qual_Tier_2.pak pakfile.
  • Tier 3: This is again in the Soccer Field environment.
    The race track is in the Qual_Tier_1_and_Tier_3.pak pakfile.

• How to generate logfiles for each tier:

  • Loading level and starting race:

    • Please update your airsimneurips pythonclient (should be >=1.0.0).

    • Calling simStartRace(race_tier=1, 2, or 3) generates the appropriate log files.

    • Tier 1:

       	airsim_client.simLoadLevel('Qualifier_Tier_1')
       	airsim_client.simStartRace(1)

    • Tier 2:

       	airsim_client.simLoadLevel('Qualifier_Tier_2')
       	airsim_client.simStartRace(2)

    • Tier 3:

       	airsim_client.simLoadLevel('Qualifier_Tier_3')
       	airsim_client.simStartRace(3)

  • As Tier 2 focuses on perception and Tier 3 focuses on both perception and planning, note that simGetObjectPose returns noisy gate poses, after simStartRace(2) and simStartRace(3) is called.

  • As soon as simStartRace(1) or simStartRace(3) is called, drone_2 (MSR opponent racer) will start flying.

  • See baseline_racer.py for sample code. The previous bullet points are being called in wrapper functions in the following snippet in baseline_racer.py:

   	baseline_racer.load_level(args.level_name)
   	if args.level_name == "Qualifier_Tier_1":
   	    args.race_tier = 1
   	if args.level_name == "Qualifier_Tier_2":
   	    args.race_tier = 2
   	if args.level_name == "Qualifier_Tier_3":
   	    args.race_tier = 3
   	baseline_racer.start_race(args.race_tier)

• To submit your results to the leaderboard:

  • Navigate to the submission site, enter your team name in the proper field, and upload any number of race logs.
    It's ok to make a submission for as little as a single track and/or a single tier.
    You can find race logs inside of AirSimExe/Saved/Logs/RaceLogs in your downloaded binary folder.
    Please read the race monitoring section in the competition guidelines for more details.
  • The leaderboard will publish the results of a drone that is named drone_1 (call generate_settings_file.py to generate an AirSim settings file, as done for the baseline_racer below.
  • Please submit a PDF file in the report section to help us verify the honesty of your submission for the Nov 21st deadline. Please summarize your approach for all tiers you make a submission for, with appropriate citations. The report PDF size should not exceed 10 MB, and should be a maximum of 4 pages in length. We leave the exact format of the report to your descrition, but the IEEE template is a good choice.
  • We have emailed you a private key, which should be entered in the Team ID field. This helps us verify it was your team who indeed made the submission.
  • The leaderboard is updated once per day at 2100 PST.
    If you do not see your results after 24 hours, please email us with your team name and submitted log files.

Sample code

• Plan and move on minimum jerk trajectory using gate ground truth poses:
  • Generate an AirSim settings.json file

  $ cd baselines;
  $ python generate_settings_file.py

  • Start the AirSim Neurips binary, as explained above
  • Run the code!
    See all the baseline arguments here

  $ python baseline_racer.py \
  	--enable_viz_traj \
  	--enable_viz_image_cv2 \
  	--planning_baseline_type all_gates_at_once \
  	--planning_and_control_api moveOnSpline \
  	--level_name ZhangJiaJie_Medium \
  	--race_tier 1 

• Plan a Game Theoretic Plan (GTP) trajectory for an ego drone based on an estimate of the opponent drone's behavior.
  • Generate an AirSim settings.json file

  $ cd baselines;
  $ python generate_settings_file.py

  • Start the AirSim Neurips binary, as explained above
  • Run the GTP code!

  $ python baseline_racer_gtp.py \
  	--blocking_behavior \
  	--plot_gtp \
  	--enable_viz_traj \
  	--level_name Qualifier_Tier_1

  • This method is an Iterative Best Response (IBR) trajectory planning technique. In IBR, first the trajectories of both drones are initialized as straight down the track at maximum speed (to win the game!). The opponent trajectory is then held constant while we solve for the ego trajectory via Model Predictive Control (MPC) optimization (details in gtp.py). Then, we hold the ego trajectory constant and solve for a guess of the opponent's trajectory in the same fashion. If after some iterations, the solution convereges (i.e., the resulting trajectories stop changing), we have reached a Nash equilibrium over the space of trajectories. That is to say, either agents can not unilaterally change their trajectory to increase their own performance. This implementation is a heuristic based on the original method proposed in the paper below (PDF here).
    • R. Spica, D. Falanga, E. Cristofalo, E. Montijano, D. Scaramuzza, and M. Schwager, "A Real-Time Game Theoretic Planner for Autonomous Two-Player Drone Racing", in the Proccedings of Robotics: Science and Systems (RSS), 2018.

Quick API overview

• Changing unreal environments
  There are two ways to swap between environments / "unreal level", either via AirSIm API or by the UI menu.

  • Python API Use simLoadLevel(level_name="MainMenu") to change Unreal environments on the fly.
    Possible values for level_name are : "Soccer_Field_Easy", "Soccer_Field_Medium", "ZhangJiaJie_Medium", "Building99_Hard". Here's a quick snippet to iterate throught all the training environments.
    Before trying this, please ensure you've downloaded the corresponding training (v0.3) / qualifier (v1.0) binaries, as described above

     import airsimneurips as airsim
     client = airsim.MultirotorClient()
     client.confirmConnection()
    
     # use this for training environments (v0.3)
    
     client.simLoadLevel('Soccer_Field_Easy')	
     client.simLoadLevel('Soccer_Field_Medium')	
     client.simLoadLevel('ZhangJiaJie_Medium')
     client.simLoadLevel('Building99_Hard')
    
     # use this for qualification environments (v1.0)
     client.simLoadLevel('Qualification_Tier_1')	
     client.simLoadLevel('Qualification_Tier_2')	
     client.simLoadLevel('Qualification_Tier_3')	

  • UI Menu

    • Press F10 to toggle the level menu
    • Click your desired level. (Note: the UI lists all the pakfiles in the AirSim/AirSimExe/Content/Paks directory. Ensure you downloaded the pakfile, if you are not able to see a particular environment)

Questions

Please open a Github Issue on this repository (not AirSim) for any technical questions w.r.t. the Neurips competition.