spaceBattleGame
Created by Jialin Liu on 4 Oct 2016
CSEE, University of Essex, UK
Email: jialin.liu.cn@gmail.com
Game
Single- and 2-player space battle game, derived from the original Spacewar. The framework is adapted to the GVG-AI competition.
Spaceship
Each player/agent controllers a spaceship which has a maximal speed (units distance/game tick), and slows down over time. At each game tick, the player can choose to do nothing or to make an action among {RotateClockwise, RotateAnticlockwise, Thrust, Shoot}. A missile is launched while the Shoot action is chosen and its cooldown period is finished, otherwise, no action will be made (like do nothing). The spaceship is affected by a random recoil force when launching a missile.
Missile
A missile has a maximal speed (units distance/game tick), and vanishes into nothing later (e.g. after 30 game ticks). It never damages its mother ship.
Score
Every time a player hits its opponent, it obtains r points (reward). Every time a player launches a missile, it is penalized by a predefined c points (cost). Given a game state s, the player i has a score calculated using the number of lives subtracted from the opponent and the number of launched missiles by player i.
End condition
The end consition is playable, the current one is detailed here. A game ends after T game ticks. A player wins the game if it has higher score than its opponent after T game ticks, and it's a loss of the other player. If both players have the same score, it's a draw for both. Another common end codition is the game ends if one of the player loses a number of lives.
Visualisation
Every spaceship has a radius of 20 pixels and every missile has a radius of 4 pixels in a layout of size 640*480.
Parameter space (game space)
Once a parameter setting is chosen, a new game instance is created. The playable parameters are listed in ontology/Constants.java. Examples are, but not limited to, the speed of spaceship/missile, the reward of hitting the opponent, the cost of firing, the radius of spaceship, etc.
Structure of The Repository
[ontology] (https://github.com/ljialin/spaceBattleGame/tree/master/src/ontology)
physics
The physics in the game, for instance, the gravity, the random repulsive force, etc. The use of physics increases the stochasticity of the game.
asteroids
The main game objects in the game.
core
The main game and abstract class of players.
controllers
Human controllers and deterministic controllers, and some sample AI controllers from the GVG-AI. The heuristics are also placed here, as they are parts of AI controllers.
competition
This is the same as the one in the GVG-AI competition. The total game ticks of a game and the legal time for making a decision at every game tick are set in competition/CompetitionParameters.java, for the purpose of being adapted to the controllers submitted to the GVG-AI competition.
bandits
Our optimiser BanditEA. The simpler version for binary problem is introduced in our arxiv paper Bandit-Based Random Mutation Hill-Climbing.
test
Tests. Please refer to test/GameTest.java for an example of using this framework.