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game.py
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# CNN Deep Reinforcement Learning Snake AI
# By Elvis Sun
import numpy as np
import random, pygame, sys, operator, os, time, argparse
import keras.utils
from pygame.locals import *
FPS = 60
CELLWIDTH = 5
CELLHEIGHT = 5
CELLSIZE = 50
WINDOWWIDTH = CELLWIDTH * CELLSIZE
WINDOWHEIGHT = CELLHEIGHT * CELLSIZE
assert WINDOWWIDTH % CELLSIZE == 0, "Window width must be a multiple of cell size."
assert WINDOWHEIGHT % CELLSIZE == 0, "Window height must be a multiple of cell size."
# R G B
WHITE = (255, 255, 255)
GREY = (200, 200, 200)
PINK = (198, 134, 156)
BLACK = ( 17, 18, 13)
RED = (255, 0, 0)
GREEN = ( 0, 255, 0)
DARKGREEN = ( 0, 155, 0)
DARKGRAY = ( 40, 40, 40)
ORANGE = (255, 155, 111)
BGCOLOR = BLACK
UP = 'up'
DOWN = 'down'
LEFT = 'left'
RIGHT = 'right'
HEAD = 0 # syntactic sugar: index of the worm's head
def main():
global FPSCLOCK, DISPLAYSURF, BASICFONT
display = False
if (len(sys.argv) > 1) and sys.argv[1] == '-d':
display = True
if display:
pygame.init()
FPSCLOCK = pygame.time.Clock()
DISPLAYSURF = pygame.display.set_mode((WINDOWWIDTH, WINDOWHEIGHT))
BASICFONT = pygame.font.Font('freesansbold.ttf', 18)
pygame.display.set_caption('Wormy')
game = Game()
while True: # main game loop
game.move(RIGHT)
if display:
updateDisplay(game)
if game.is_terminal():
break
print(game.get_score())
class Game():
def render(self):
global FPSCLOCK, DISPLAYSURF, BASICFONT
if self.firstCall:
self.firstCall = False
pygame.init()
FPSCLOCK = pygame.time.Clock()
DISPLAYSURF = pygame.display.set_mode((WINDOWWIDTH, WINDOWHEIGHT))
BASICFONT = pygame.font.Font('freesansbold.ttf', 18)
pygame.display.set_caption('CNN Snake')
updateDisplay(self)
def __init__(self):
self.observation_space = np.zeros((CELLWIDTH + 2,CELLHEIGHT + 2))
self.action_space = 4
self.firstCall = True
def __getattr__(self, name):
if hasattr(self.st, name):
return getattr(self.st, name)
else:
raise AttributeError
def reset(self):
self.head = {'x': 0, 'y': 0}
self.gameOver = False
self.direction = RIGHT
self.score = 0
startx = 0
starty = 0
self.wormCoords = [{'x': startx + 3, 'y': starty},
{'x': startx + 2, 'y': starty},
{'x': startx + 1, 'y': starty},
]
self.apple = getRandomLocation(self.wormCoords)
return self.get_state_map()
def get_state(self):
return (self.wormCoords, self.apple)
def move(self, action):
action = num_to_action(action)
assert not self.gameOver, "Game over!"
appleReward = 50
deathReward = -50
moveReward = 10
reward = 0
apple = self.apple
newHead = findNewHead(action, self.wormCoords)
self.wormCoords.insert(0, newHead)
if self.wormCoords[HEAD]['x'] == -1 or self.wormCoords[HEAD]['x'] == CELLWIDTH or self.wormCoords[HEAD]['y'] == -1 or self.wormCoords[HEAD]['y'] == CELLHEIGHT:
self.gameOver = True
reward = deathReward
for wormBody in self.wormCoords[1:]:
if wormBody['x'] == self.wormCoords[HEAD]['x'] and wormBody['y'] == self.wormCoords[HEAD]['y']:
self.gameOver = True
reward = deathReward
#if didn't die, move snake
if not self.gameOver:
if self.wormCoords[HEAD]['x'] == apple['x'] and self.wormCoords[HEAD]['y'] == apple['y']:
self.apple = getRandomLocation(self.wormCoords) # set a new apple somewhere
reward = appleReward
else:
self.wormCoords.pop() # remove worm's tail segment
reward = moveReward
self.score = self.score + reward
#print(reward,self.gameOver,self.score)
return (self.get_state_map(),reward,self.gameOver,self.score)
def is_terminal(self):
return self.gameOver
def get_score(self):
return self.score
def get_state_map(self):
#return pygame.surfarray.array3d(pygame.display.get_surface())
stateMap = [[0 for i in range(CELLWIDTH + 2)] for j in range(CELLHEIGHT + 2)]
#label walls as 4
for i, row in enumerate(stateMap):
for j, cell in enumerate(row):
if i==0 or i==(CELLWIDTH+1) or j==0 or j==(CELLHEIGHT+1):
stateMap[i][j] = 1
for i, cell in enumerate(self.wormCoords):
#print(cell) #this goes to 10
#mark worm body as 1
stateMap[cell['y'] + 1][cell['x'] + 1] = 2
#mark head as 2
if i == 0:
stateMap[cell['y'] + 1][cell['x'] + 1] = 3
#mark apple as 3
stateMap[self.apple['y'] + 1][self.apple['x'] + 1] = 4
categorical_2d_map = keras.utils.to_categorical(np.array(stateMap), num_classes = 5)
categorical_2d_map_for_conv2D = np.array(stateMap).reshape(1,CELLWIDTH+2,CELLHEIGHT+2,1)
#one_hot_3d_map = keras.utils.to_categorical(categorical_2d_map.reshape((CELLWIDTH + 2) * (CELLHEIGHT + 2)), num_classes = 5)
#one_hot_4d_map = one_hot_3d_map.reshape(1,CELLWIDTH+2,CELLHEIGHT+2,5)
#print(categorical_2d_map.shape)
#print(categorical_2d_map)
return categorical_2d_map
#
# print("\n")
# print(categorical_2d_map.reshape(1,(CELLWIDTH + 2) * (CELLHEIGHT + 2)))
# print("\n")
# print(one_hot_3d_map)
# print("\n")
# print(one_hot_4d_map)
# print("\n")
def num_to_action(num):
if num == 0:
return UP
elif num == 1:
return DOWN
elif num == 2:
return LEFT
elif num == 3:
return RIGHT
assert False, "Wrong action number"
def updateDisplay(game):
for event in pygame.event.get(): # event handling loop
if event.type == QUIT:
terminate()
elif event.type == KEYDOWN:
if event.key == K_ESCAPE:
terminate()
DISPLAYSURF.fill(BGCOLOR)
drawGrid()
drawWorm(game.get_state()[0])
drawApple(game.get_state()[1])
drawScore(len(game.get_state()[0]) - 3)
pygame.display.update()
FPSCLOCK.tick(FPS)
def calcDistance(point, apple):
distance = abs(point['x'] - apple['x']) + abs(point['y'] - apple['y'])
return distance
def pauseGame():
pauseGame = True
while (pauseGame):
for event in pygame.event.get():
if event.type == KEYDOWN:
if event.key == K_SPACE:
pauseGame = False
def oppositeDirection(direction):
if direction == UP:
return DOWN
elif direction == DOWN:
return UP
elif direction == LEFT:
return RIGHT
elif direction == RIGHT:
return LEFT
def findNewHead(direction,wormCoords):
newHead = {}
if direction == UP:
newHead = {'x': wormCoords[HEAD]['x'], 'y': wormCoords[HEAD]['y'] - 1}
elif direction == DOWN:
newHead = {'x': wormCoords[HEAD]['x'], 'y': wormCoords[HEAD]['y'] + 1}
elif direction == LEFT:
newHead = {'x': wormCoords[HEAD]['x'] - 1, 'y': wormCoords[HEAD]['y']}
elif direction == RIGHT:
newHead = {'x': wormCoords[HEAD]['x'] + 1, 'y': wormCoords[HEAD]['y']}
return newHead
"""
////////////////////////////////////////////////////////////////////////////
"""
def drawPressKeyMsg():
pressKeySurf = BASICFONT.render('Press a key to play.', True, DARKGRAY)
pressKeyRect = pressKeySurf.get_rect()
pressKeyRect.topleft = (WINDOWWIDTH - 200, WINDOWHEIGHT - 30)
DISPLAYSURF.blit(pressKeySurf, pressKeyRect)
def checkForKeyPress():
if len(pygame.event.get(QUIT)) > 0:
terminate()
keyUpEvents = pygame.event.get(KEYUP)
if len(keyUpEvents) == 0:
return None
if keyUpEvents[0].key == K_ESCAPE:
terminate()
return keyUpEvents[0].key
def showStartScreen():
titleFont = pygame.font.Font('freesansbold.ttf', 100)
titleSurf1 = titleFont.render('Wormy!', True, WHITE, DARKGREEN)
titleSurf2 = titleFont.render('Wormy!', True, GREEN)
degrees1 = 0
degrees2 = 0
while True:
DISPLAYSURF.fill(BGCOLOR)
rotatedSurf1 = pygame.transform.rotate(titleSurf1, degrees1)
rotatedRect1 = rotatedSurf1.get_rect()
rotatedRect1.center = (WINDOWWIDTH / 2, WINDOWHEIGHT / 2)
DISPLAYSURF.blit(rotatedSurf1, rotatedRect1)
rotatedSurf2 = pygame.transform.rotate(titleSurf2, degrees2)
rotatedRect2 = rotatedSurf2.get_rect()
rotatedRect2.center = (WINDOWWIDTH / 2, WINDOWHEIGHT / 2)
DISPLAYSURF.blit(rotatedSurf2, rotatedRect2)
drawPressKeyMsg()
if checkForKeyPress():
pygame.event.get() # clear event queue
return
pygame.display.update()
FPSCLOCK.tick(FPS)
degrees1 += 3 # rotate by 3 degrees each frame
degrees2 += 7 # rotate by 7 degrees each frame
def terminate():
print('YOU DIED!')
pauseGame()
pygame.quit()
sys.exit()
def getRandomLocation(worm):
location = {'x': random.randint(0, CELLWIDTH - 1), 'y': random.randint(0, CELLHEIGHT - 1)}
while(location in worm):
location = {'x': random.randint(0, CELLWIDTH - 1), 'y': random.randint(0, CELLHEIGHT - 1)}
return location
def showGameOverScreen():
gameOverFont = pygame.font.Font('freesansbold.ttf', 150)
gameSurf = gameOverFont.render('Game', True, WHITE)
overSurf = gameOverFont.render('Over', True, WHITE)
gameRect = gameSurf.get_rect()
overRect = overSurf.get_rect()
gameRect.midtop = (WINDOWWIDTH / 2, 10)
overRect.midtop = (WINDOWWIDTH / 2, gameRect.height + 10 + 25)
DISPLAYSURF.blit(gameSurf, gameRect)
DISPLAYSURF.blit(overSurf, overRect)
drawPressKeyMsg()
pygame.display.update()
pygame.time.wait(500)
checkForKeyPress() # clear out any key presses in the event queue
while True:
if checkForKeyPress():
pygame.event.get() # clear event queue
return
def drawScore(score):
scoreSurf = BASICFONT.render('Score: %s' % (score), True, WHITE)
scoreRect = scoreSurf.get_rect()
scoreRect.topleft = (WINDOWWIDTH - 120, 10)
DISPLAYSURF.blit(scoreSurf, scoreRect)
def drawWorm(wormCoords):
for coord in wormCoords:
x = coord['x'] * CELLSIZE
y = coord['y'] * CELLSIZE
#wormSegmentRect = pygame.Rect(x, y, CELLSIZE, CELLSIZE)
#pygame.draw.rect(DISPLAYSURF, WHITE, wormSegmentRect)
wormInnerSegmentRect = pygame.Rect(x + 1, y + 1, CELLSIZE - 2, CELLSIZE - 2)
pygame.draw.rect(DISPLAYSURF, WHITE, wormInnerSegmentRect)
def drawApple(coord):
x = coord['x'] * CELLSIZE
y = coord['y'] * CELLSIZE
appleRect = pygame.Rect(x, y, CELLSIZE, CELLSIZE)
pygame.draw.rect(DISPLAYSURF, RED, appleRect)
def drawGrid():
return #do nothing
for x in range(0, WINDOWWIDTH, CELLSIZE): # draw vertical lines
pygame.draw.line(DISPLAYSURF, DARKGRAY, (x, 0), (x, WINDOWHEIGHT))
for y in range(0, WINDOWHEIGHT, CELLSIZE): # draw horizontal lines
pygame.draw.line(DISPLAYSURF, DARKGRAY, (0, y), (WINDOWWIDTH, y))
if __name__ == '__main__':
main()
'''
{'x': startx + 3, 'y': starty},
{'x': startx + 2, 'y': starty},
{'x': startx + 1, 'y': starty},
{'x': startx, 'y': starty},
{'x': startx, 'y': starty + 1},
{'x': startx, 'y': starty + 2},
{'x': startx, 'y': starty + 3},
{'x': startx, 'y': starty + 4},
{'x': startx, 'y': starty + 5},
{'x': startx - 1, 'y': starty + 5},
{'x': startx - 2, 'y': starty + 5},
{'x': startx - 3, 'y': starty + 5},
{'x': startx - 4, 'y': starty + 5},
{'x': startx - 5, 'y': starty + 5},
{'x': startx - 5, 'y': starty + 6},
{'x': startx - 5, 'y': starty + 7},
{'x': startx - 5, 'y': starty + 8},
{'x': startx - 5, 'y': starty + 9},
{'x': startx - 5, 'y': starty + 10},
{'x': startx - 5, 'y': starty + 11},
{'x': startx - 5, 'y': starty + 12},
{'x': startx - 5, 'y': starty + 13},
{'x': startx - 5, 'y': starty + 14},
{'x': startx - 5, 'y': starty + 15},
{'x': startx - 5, 'y': starty + 16},
{'x': startx - 5, 'y': starty + 17},
{'x': startx - 5, 'y': starty + 18},
{'x': startx - 5, 'y': starty + 19},
{'x': startx - 5, 'y': starty + 20},
{'x': startx - 4, 'y': starty + 20},
{'x': startx - 3, 'y': starty + 20},
{'x': startx - 2, 'y': starty + 20},
{'x': startx - 1, 'y': starty + 20},
{'x': startx - 0, 'y': starty + 20},
{'x': startx + 1, 'y': starty + 20},
{'x': startx + 2, 'y': starty + 20},
{'x': startx + 3, 'y': starty + 20},
{'x': startx + 4, 'y': starty + 20},
{'x': startx + 5, 'y': starty + 20},
{'x': startx + 6, 'y': starty + 20},
{'x': startx + 7, 'y': starty + 20},
{'x': startx + 8, 'y': starty + 20},
{'x': startx + 9, 'y': starty + 20},
{'x': startx + 10, 'y': starty + 20},
{'x': startx + 11, 'y': starty + 20},
{'x': startx + 12, 'y': starty + 20},
{'x': startx + 13, 'y': starty + 20},
{'x': startx + 14, 'y': starty + 20},
{'x': startx + 15, 'y': starty + 20},
{'x': startx + 16, 'y': starty + 20},
{'x': startx + 17, 'y': starty + 20},
{'x': startx + 18, 'y': starty + 20},
{'x': startx + 19, 'y': starty + 20},
{'x': startx + 19, 'y': starty + 19},
{'x': startx + 18, 'y': starty + 19},
{'x': startx + 17, 'y': starty + 19},
{'x': startx + 16, 'y': starty + 19},
{'x': startx + 15, 'y': starty + 19},
{'x': startx + 14, 'y': starty + 19},
{'x': startx + 13, 'y': starty + 19},
{'x': startx + 12, 'y': starty + 19},
{'x': startx + 11, 'y': starty + 19},
{'x': startx + 10, 'y': starty + 19},
{'x': startx + 10, 'y': starty + 18},
{'x': startx + 11, 'y': starty + 18},
{'x': startx + 12, 'y': starty + 18},
{'x': startx + 13, 'y': starty + 18},
{'x': startx + 14, 'y': starty + 18},
{'x': startx + 15, 'y': starty + 18},
{'x': startx + 16, 'y': starty + 18},
{'x': startx + 17, 'y': starty + 18},
{'x': startx + 18, 'y': starty + 18},
{'x': startx + 19, 'y': starty + 18},
{'x': startx + 19, 'y': starty + 17},
{'x': startx + 18, 'y': starty + 17},
{'x': startx + 17, 'y': starty + 17},
{'x': startx + 16, 'y': starty + 17},
{'x': startx + 15, 'y': starty + 17},
{'x': startx + 14, 'y': starty + 17},
{'x': startx + 13, 'y': starty + 17},
{'x': startx + 12, 'y': starty + 17},
{'x': startx + 11, 'y': starty + 17},
{'x': startx + 10, 'y': starty + 17}
'''