You can create your AI for ghosts and pacman, and test them on using this repo.
To run and test your AIs, you need to run main.py, which will host a pacman game at https://localhost:5000. Every update, the ghosts.py and pacman.py recieve the state of the pacman maze in the argument state.
The state argument is a dictionary given in the following format -
{
"grid": [ ... ], # grid state of the maze (clarified in next section)
"red": [row,col], # Row and column at which red ghost is present
"cyan": [row,col], # Row and column at which cyan ghost is present
"pink": [row,col], # Row and column at which pink ghost is present
"orange": [row,col], # Row and column at which orange ghost is present
"pacman": [row, col] # Row and column at which pacman is present
}
ghosts.py recieve an extra argument colour, in order for the singular ghost AI function to recognize it's position.
After recieving this, the functions need to return a list with 2 items.
This list indicates a direction in either of the 4 directions - up, down, left or right. These are represented by [x,y] -
return [-1,0] - go left
return [1,0] - go right
return [0,-1] - go up
return [0,1] - go down
The ghost AIs and the pacman AIs are to be built only in the ghosts.py and pacman.py script respectively.
The grid is updated only once a second, each ghost and pacman can move only one step within the update.
Grid follows this exact mapping
[[4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4],
[4, 1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 4],
[4, 1, 3, 1, 1, 2, 1, 1, 1, 2, 1, 2, 1, 1, 1, 2, 1, 1, 3, 1, 4],
[4, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 4],
[4, 1, 2, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 2, 1, 4],
[4, 1, 2, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 1, 4],
[4, 1, 1, 1, 1, 2, 1, 1, 1, 4, 1, 4, 1, 1, 1, 2, 1, 1, 1, 1, 4],
[4, 4, 4, 4, 1, 2, 1, 4, 4, 4, 4, 4, 4, 4, 1, 2, 1, 4, 4, 4, 4],
[1, 1, 1, 1, 1, 2, 1, 4, 1, 1, 1, 1, 1, 4, 1, 2, 1, 1, 1, 1, 1],
[4, 4, 4, 4, 4, 2, 4, 4, 1, 4, 4, 4, 1, 4, 4, 2, 4, 4, 4, 4, 4],
[1, 1, 1, 1, 1, 2, 1, 4, 1, 1, 1, 1, 1, 4, 1, 2, 1, 1, 1, 1, 1],
[4, 4, 4, 4, 1, 2, 1, 4, 4, 4, 4, 4, 4, 4, 1, 2, 1, 4, 4, 4, 4],
[4, 1, 1, 1, 1, 2, 1, 4, 1, 1, 1, 1, 1, 4, 1, 2, 1, 1, 1, 1, 4],
[4, 1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 4],
[4, 1, 2, 1, 1, 2, 1, 1, 1, 2, 1, 2, 1, 1, 1, 2, 1, 1, 2, 1, 4],
[4, 1, 3, 2, 1, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 2, 1, 2, 3, 1, 4],
[4, 1, 1, 2, 1, 2, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 1, 4],
[4, 1, 2, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 1, 4],
[4, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 4],
[4, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 4],
[4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4]]
Where -
4 - Is a blank space
1 - Is a block or barrier
2 - Is a grid dot or point
3 - Are power pellets (i.e the main pacman power-up)
The grid does not represent the ghosts or pacman's position. It will report updates of the pellets in the grid.
A character may only move in the 4, 2 and 3 spaces alloted. If the character sends a move which crosses a block, it will not be played on the board. After pacman eats a pellet, the 2 or 3 in the grid, becomes a 4. When the character goes into the pathway going to the other side, it will get teleported to the other side of the map.
A update counter is used for updating the game board. An update is 0.5 seconds (with delays from calculations made by AI) \
- Weak mode is triggered when pacman eats (or visits) a 3 cell, also known as a powerup pellet. \
- When a ghost is eaten in weak mode, it is kept imprisoned for 10 updates (in the middle). \
- At the beginning, ghosts are randomly placed. They start moving one after another at a delay of 4 updates \
- Weak mode runs for 15 updates \
Similar to the real game, pacman cannot land on the same tile as the ghost. Pacman only wins when all dots of the maze are eaten.