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GoBigger is a simple and efficient agar-like game engine and provides various interfaces for game AI development. The game is similar to Agar, which is a massively multiplayer online action game created by Brazilian developer Matheus Valadares. In GoBigger, players control one or more circular balls in a map. The goal is to gain as much size as possible by eating food balls and other balls smaller than the player's balls while avoiding larger ones which can eat the player's balls. Each player starts with one ball, but players can split a ball into two when it reaches a sufficient size, allowing them to control multiple balls.
Decision AI Engine
Traditional academic environments and benchmarks
Real world decision AI applications
General nested data lib
Docs and Tutorials
System Support Components
GoBigger allows users to interact with the multi-agent environment easily within the basic rules. Through the given interface, users can simply get the observation in game and apply their operations for their agents.
In order to understand the rules in the game, GoBigger provides a few concepts as following:
Match: GoBigger will allow serveral agents (4 by default) to join in a match. There are many different units in a match, such as food balls, thorns balls, spore balls and player balls. Each agent should gain more size by eating other balls to get a higher rank when this match ends.Agent: Each agent control a team including serveral players (3 by default). Teamwork is important for a agent to play against other agents.Player: Each player starts with one ball. In order to improve the operability of the game, GoBigger provides serveral operation for a player ball, including split, eject and stop.Ball: GoBigger provides 4 kinds of balls in a match.
Food Ball: Food balls are the neutral resources in the game. If a player ball eat a food ball, the food ball’s size will be parsed to the player ball.Thorn Ball: If a player ball eat a thorns ball, the thorns ball’s size will be parsed to the player ball. But at the same time, the player ball will explode and will be splited into several pieces (10 by default).Spore Ball: Spore balls are ejected by the player balls.Player Ball: Player balls are the balls you can control in the game. You can change its moving direction. In addition, it can eat other balls smaller than itself by covering others’ center.For more details, please refer to what-is-gobigger.
GoBigger also provide a wealth of observable information, and the observation space can be devided into two part. Here is the brief description of the observation space. For more details, please refer to observation-space.
Global state provides information related to the whole match, such as the map size, the total time and the last time of the match, and the leaderboard within team name and score.
Player state should be like:
{
player_name: {
'feature_layers': list(numpy.ndarray), # features of player
'rectangle': [left_top_x, left_top_y, right_bottom_x, right_bottom_y], # the vision's position in the map
'overlap': {
'food': [[position.x, position.y, radius], ...],
'thorns': [[position.x, position.y, radius], ...],
'spore': [[position.x, position.y, radius], ...],
'clone': [[[position.x, position.y, radius, player_name, team_name], ...],
}, # all balls' info in vision
'team_name': team_name, # the team which this player belongs to
}
}
We define that feature_layers in player_state represents the feature of this player. feature_layers has several channels, and each channel gives the info of food balls, or spore balls, or thorns balls, or player balls in its vision. For example, in a match we have 4 teams and 3 players for each team, then we get feature_layers as a list, and the length of this list should be 15, including 12 player channel, 1 food ball channel , 1 spore ball channel and 1 thorns ball channel.
Since getting feature_layers costs much time, GoBigger also provides player state without feature_layers when you add use_spatial=False in your render. More details here.
In fact, a ball can only move, eject, split, and stop in a match, thus the action space simply includes:
More details in action-space.
We test GoBigger within the following system:
And we recommend that your python version is 3.6.
You can simply install GoBigger from PyPI with the following command:
pip install gobigger
If you use Anaconda or Miniconda, you can install GoBigger through the following command:
conda install -c opendilab gobigger
You can also install with newest version through GitHub. First get and download the official repository with the following command line.
git clone https://github.com/opendilab/GoBigger.git
Then you can install from source:
# install for use
# Note: use `--user` option to install the related packages in the user own directory(e.g.: ~/.local)
pip install . --user
# install for development(if you want to modify GoBigger)
pip install -e . --user
After installation, you can launch your game environment easily according the following code:
import random
from gobigger.server import Server
from gobigger.render import EnvRender
server = Server()
render = EnvRender(server.map_width, server.map_height)
server.set_render(render)
server.start()
player_names = server.get_player_names_with_team()
# get [[team1_player1, team1_player2], [team2_player1, team2_player2], ...]
for i in range(10000):
actions = {player_name: [random.uniform(-1, 1), random.uniform(-1, 1), -1] \
for team in player_names for player_name in team}
if not server.step(actions):
global_state, screen_data_players = server.obs()
else:
print('finish game!')
break
server.close()
We also build a simple env following gym.Env. For more details, you can refer to gobigger_env.py.
GoBigger allow users to play game on their personal computer in real-time. Serveral modes are supported for users to explore this game.
If you want to play real-time game on your PC on your own, you can launch a game with the following code:
python -m gobigger.bin.play --player-num 1 --vision-type full
In this mode, up arrow & down arrow & left arrow & rigth arrow allows your balls move, Q means eject spore on your moving direction, W means split your balls, and E means stop all your balls and gather them together.
If you want to play real-time game on your PC with your friends, you can launch a game with the following code:
python -m gobigger.bin.play --player-num 2 --vision-type full
In this mode, player1 use up arrow & down arrow & left arrow & rigth arrow allows the balls move, [ means eject spore on your moving direction, ] means split your balls, and \ means stop all your balls and gather them together. player2 use W & S & A & D allows the balls move, 1 means eject spore on your moving direction, 2 means split your balls, and 3 means stop all your balls and gather them together.
If you want to play real-time game on your PC with only partial vision, you can launch a game with the following code:
python -m gobigger.bin.play --player-num 1 --vision-type partial
Your vision depends on all your balls’ positions and their size.
If you want to play against a bot, you can launch a game with the following code:
python -m gobigger.bin.play --vs-bot
You can also add more bots in your game. Try to win the game with more bots!
python -m gobigger.bin.play --vs-bot --team-num 4
If you want to test agent without human player, you can launch a game with the following code:
python -m gobigger.bin.play --bot-only --player-num 3 --team-num 1
You can also test your custom agent with --agent-class argument:
python -m gobigger.bin.play --bot-only --player-num 3 --team-num 4 --agent-class submit.bot_submission:BotSubmission
Beware your agent class should implement __init__(self, team_name, player_names) get_actions(self, obs) -> action method.
For more details, please refer to GoBigger Doc (中文版).
GoBigger released under the Apache 2.0 license.
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