182 lines
4.8 KiB
Markdown
182 lines
4.8 KiB
Markdown
# Pytron
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This program is a simple python game, made for implementing your own AIs.
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## Table of contents
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- [How to download the game](#how-to-download-the-game)
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- [How to play the game](#how-to-play-the-game)
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- [How to create your own AI](#how-to-create-your-own-ai)
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- [Info about how map works](#about-map)
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## How to download the game
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The first step is to clone the repository:
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``` sh
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git clone https://gitea.tforgione.fr/tforgione/pytron
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```
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Then, ensure you have `python3` and `pygame` installed. You can test you have
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everything by executing the following command:
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```
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python3 -c "import pygame"
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```
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- if you get a `python3: command not found`, it means you don't have
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`python3`, you can install it on ubuntu like so:
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``` sh
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sudo apt install python3
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```
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- if you get a `ImportError: No module named 'pygame'`, it means you don't
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have `pygame`, you can install it on ubuntu like so:
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``` sh
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sudo apt install python3-pip
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sudo pip3 install pygame
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```
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## How to play the game
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There are two runnable scripts in the repository, which are mostly here to be
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examples:
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- `play.py` which shows how to create a game with a window and play against
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an AI.
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- `headless.py` which shows how to run a game with AIs without watching the
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interface, and thus, really fast.
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## How to create your own AI
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You need to write a class that derives from `snake.player.Player`. You have to
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define a constructor, so you can instanciate it, and implement the method
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`action` which takes as parameter the map of the game, and returns the
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direction you want to take.
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For example, you can create a file `myplayer.py` at the root of this repository
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containing the following:
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``` python
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from snake.player import Player, Direction
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class MyPlayer(Player):
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def __init__(self):
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super(MyPlayer, self).__init__()
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def action(self, game_map):
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# Do stuff
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return Direction.DOWN
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```
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and you can create an executable file containing the following:
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``` python
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#!/usr/bin/env python3
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import contextlib
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with contextlib.redirect_stdout(None):
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import pygame
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from snake.map import Map
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from snake.game import Game, PositionPlayer
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from snake.window import Window
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from snake.player import Player, Direction, ConstantPlayer, KeyboardPlayer
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def main():
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pygame.init()
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width = 40
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height = 40
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game = Game(width, height, [
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PositionPlayer(1, KeyboardPlayer(Direction.RIGHT), [0, 0]),
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PositionPlayer(2, ConstantPlayer(Direction.LEFT), [width - 1, height - 1]),
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])
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window = Window(game, 20)
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game.main_loop(window)
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if __name__ == '__main__':
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main()
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```
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and it should work.
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## About map
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[Map](https://gitea.tforgione.fr/tforgione/pytron/src/branch/master/tron/map.py#L10)
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is one of the most important class of this project. It is made to be easy to
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manipulate with things like PyTorch.
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It contains an `np.array` of two dimensions containing two rows and two columns
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more that what specify, because is automatically adds border to your map. This
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means that when you run
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``` python3
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my_map = Map(5, 5, Case.EMPTY, Case.WALL)
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```
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it really creates a 7x7 `np.array`, in which the interior is filled with
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`Case.EMPTY` and the border with `Case.WALL`.
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### Playing with maps
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If you want to modify the map, you can do so by using the getters. **Be
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careful, the getter don't take the border into account**. You won't be able to
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modify the border with the getters.
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To use the getters, you can do like this:
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``` python3
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my_map = Map(5, 5, Case.EMPTY, Case.WALL)
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# Sets the top left corner of the map to PLAYER_ONE_HEAD
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# This does not modify the border, it modifies the inner tile.
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my_map[0, 0] = Case.PLAYER_ONE_HEAD
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```
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You can easily clone a map:
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``` python3
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my_map = Map(5, 5, Case.EMPTY, Case.WALL)
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my_second_map = my_map.clone() # Clones the whole map
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```
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If you want to clone the array of a map and apply a function to it at the same
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time, you can do like this:
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``` python3
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def my_function(x):
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return x + 1
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my_map = Map(5, 5, Case.EMPTY, Case.WALL)
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my_map.apply(my_function)
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```
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### Playing with maps' np-arrays
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At any moment, you can get a reference to the `np.array` of the map by using
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the `array` method:
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``` python3
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my_map = Map(5, 5, Case.EMPTY, Case.WALL)
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my_array = my_map.array()
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my_array[0][0] = ... # Modifies the top left tile of the border of the map
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```
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<strong>
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Be careful: when you get a reference to an np-array, you need to remember:
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- the np-array does cantain the border, so the (i, j) tile of the map is the
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(i + 1, j + 1) tile of the array
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- since you get a reference to the np-array, modifying it will also modify
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the map
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</strong>
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If you wan to modify an np-array without modifying the map, you can use the
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`clone_array` method:
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``` python3
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my_map = Map(5, 5, Case.EMPTY, Case.WALL)
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my_array = my_map.clone_array()
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# Modifying my_array won't modify my_map
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my_array[0][0] = ...
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```
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