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game.py
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game.py
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import pygame, sys
import numpy as np
dx = [1, 0, -1, 0]
dy = [0, -1, 0, 1]
wrongDir = {0: 2, 1: 3, 2: 0, 3: 1}
class Snake:
def __init__(self, x = 0, y = 0, blockSize = 20):
self.position = [[x, y]]
self.tail = [[x, y]]
self.blockSize = blockSize
self.direction = 0
def move(self):
self.tail = self.position[-1].copy()
for ind in np.arange(len(self.position) - 1, 0, -1):
self.position[ind] = self.position[ind - 1].copy()
if (self.direction == 0):
self.position[0][0] += self.blockSize
if (self.direction == 1):
self.position[0][1] += self.blockSize
if (self.direction == 2):
self.position[0][0] -= self.blockSize
if (self.direction == 3):
self.position[0][1] -= self.blockSize
class Game:
def __init__(self, width = 1280, height = 720, speed = 1, snakeColor = (0, 255, 0), foodColor = (255, 0, 0)):
self.score = 0
self.gameOver = False
self.screenHeight = height
self.screenWidth = width
self.speed = speed
self.screenSize = width, height
self.snakeColor = snakeColor
self.foodColor = foodColor
self.player = Snake()
self.clock = pygame.time.Clock()
self.screen = pygame.display.set_mode(self.screenSize)
self.newFood()
def newFood(self):
blockSize = self.player.blockSize
height = self.screenHeight
width = self.screenWidth
self.foodPosition = [blockSize * np.random.randint(0, width / blockSize), blockSize * np.random.randint(0, height / blockSize)]
def checkPosition(self):
headPosition = self.player.position[0]
height = self.screenHeight
width = self.screenWidth
if headPosition[0] < 0 or headPosition[0] > width:
self.gameOver = True
if headPosition[1] < 0 or headPosition[1] > height:
self.gameOver = True
if len(np.unique(self.player.position, axis = 0)) != len(self.player.position):
self.gameOver = True
if headPosition == self.foodPosition:
self.score += 1
self.player.position.append(self.player.tail.copy())
self.newFood()
return True
return False
def render(self):
self.screen.fill((255, 255, 255))
for i in self.player.position:
pygame.draw.rect(self.screen, self.snakeColor, [i[0], i[1], self.player.blockSize, self.player.blockSize])
pygame.draw.rect(self.screen, self.foodColor, [self.foodPosition[0], self.foodPosition[1], self.player.blockSize, self.player.blockSize])
pygame.display.update()
def play(self):
startTicks = pygame.time.get_ticks()
cur = 1
maxScore = 0
numModels = 5
bots = []
for i in range(numModels):
x = Model()
bots.append(x)
while True:
mdlScore = []
for mdl in bots:
self.prevDist = -1
self.player.__init__()
print("Iteration " + str(cur) + "\nMax score: " + str(maxScore))
while not self.gameOver:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()
# keys = pygame.key.get_pressed()
# if (keys[pygame.K_RIGHT]):
# self.player.direction = 0
# if (keys[pygame.K_DOWN]):
# self.player.direction = 1
# if (keys[pygame.K_LEFT]):
# self.player.direction = 2
# if (keys[pygame.K_UP]):
# self.player.direction = 3
if ((pygame.time.get_ticks() - startTicks) > 1):
pred = mdl.predict(self.getState())
if (wrongDir[self.player.direction] == pred):
self.gameOver = True
else:
self.player.direction = pred
self.player.move()
mdl.update(self.getReward(), self.getState())
startTicks = pygame.time.get_ticks()
if (self.checkPosition()):
print(self.score)
if (self.score > maxScore):
maxScore = self.score
mdl.update(10, self.getState())
self.prevDist = -1
self.render()
mdl.update(-10, self.getState())
self.gameOver = False
mdlScore.append(self.score)
self.score = 0
print('Game over \\_-^-_/')
cur += 1
x = [x for _, x in sorted(zip(mdlScore, bots), key = lambda x: x[0])][:5].copy()
new_bots = []
for i in bots:
for j in bots:
new_bots.append(i.join(j))
bots = new_bots.copy()
def getState(self):
x = self.foodPosition
y = self.player.position[0]
z = self.player.position
size = self.player.blockSize
print((x[0] <= y[0], x[1] >= y[1], x[0] == y[0], x[1] == y[1], self.player.direction, [x[0] - size, x[1]] in z, [x[0] + size, x[1]] in z, [x[0], x[1] - size] in z, [x[0], x[1] + size] in z))
return (x[0] <= y[0], x[1] >= y[1], x[0] == y[0], x[1] == y[1], self.player.direction, [x[0] - size, x[1]] in z, [x[0] + size, x[1]] in z, [x[0], x[1] - size] in z, [x[0], x[1] + size] in z)
def getReward(self):
x = self.foodPosition
y = self.player.position[0]
curDist = abs(x[0] - y[0]) + abs(x[1] - y[1]) + 1
if self.prevDist == -1:
self.prevDist = curDist
if self.prevDist < curDist:
rew = -1
else:
rew = 1
self.prevDist = curDist
# print(rew)
return rew
class Model:
Q = {}
LF = 0.25
DF = 0.6
def predict(self, state):
if (state not in self.Q.keys()):
self.Q[state] = np.random.rand(4)
self.prevState = state
self.action = np.argmax(self.Q[state])
# print(state, self.Q[state])
return np.argmax(self.Q[state])
def update(self, reward, state):
if (state not in self.Q.keys()):
self.Q[state] = np.random.rand(4)
# self.Q[self.prevState][self.action] += self.LF * (reward + self.DF * np.max(self.Q[state]) - self.Q[self.prevState][self.action])
self.Q[self.prevState][self.action] += self.LF * reward
def join(self, mdl):
res = Model()
for key in mdl.Q.keys():
if (key in self.Q.keys()):
res.Q[key] = (self.Q[key] + mdl.Q[key]) / 2
else:
res.Q[key] = mdl.Q[key]
return res