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42_PythonGameDevelopment.py
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312 lines (197 loc) · 7.69 KB
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import pygame
import time
import random
pygame.init()
white = (255,255,255)
black = (0,0,0)
red = (255,0,0)
green = (0,155,0)
display_width = 800
display_height = 600
gameDisplay = pygame.display.set_mode((display_width,display_height))
pygame.display.set_caption('Slither')
icon = pygame.image.load('apple2.png')
pygame.display.set_icon(icon)
img = pygame.image.load('snakehead2.png')
appleimg = pygame.image.load('apple2.png')
clock = pygame.time.Clock()
AppleThickness = 30
block_size = 20
FPS = 15
direction = "right"
smallfont = pygame.font.SysFont("comicsansms", 25)
medfont = pygame.font.SysFont("comicsansms", 50)
largefont = pygame.font.SysFont("comicsansms", 80)
def pause():
paused = True
message_to_screen("Paused",
black,
-100,
size="large")
message_to_screen("Press C to continue or Q to quit.",
black,
25)
pygame.display.update()
while paused:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_c:
paused = False
elif event.key == pygame.K_q:
pygame.quit()
quit()
#gameDisplay.fill(white)
clock.tick(5)
def score(score):
text = smallfont.render("Score: "+str(score), True, black)
gameDisplay.blit(text, [0,0])
def randAppleGen():
randAppleX = round(random.randrange(0, display_width-AppleThickness))#/10.0)*10.0
randAppleY = round(random.randrange(0, display_height-AppleThickness))#/10.0)*10.0
return randAppleX,randAppleY
def game_intro():
intro = True
while intro:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_c:
intro = False
if event.key == pygame.K_q:
pygame.quit()
quit()
gameDisplay.fill(white)
message_to_screen("Welcome to Slither",
green,
-100,
"large")
message_to_screen("The objective of the game is to eat red apples",
black,
-30)
message_to_screen("The more apples you eat, the longer you get",
black,
10)
message_to_screen("If you run into yourself, or the edges, you die!",
black,
50)
message_to_screen("Press C to play, P to pause or Q to quit.",
black,
180)
pygame.display.update()
clock.tick(15)
def snake(block_size, snakelist):
if direction == "right":
head = pygame.transform.rotate(img, 270)
if direction == "left":
head = pygame.transform.rotate(img, 90)
if direction == "up":
head = img
if direction == "down":
head = pygame.transform.rotate(img, 180)
gameDisplay.blit(head, (snakelist[-1][0], snakelist[-1][1]))
for XnY in snakelist[:-1]:
pygame.draw.rect(gameDisplay, green, [XnY[0],XnY[1],block_size,block_size])
def text_objects(text,color,size):
if size == "small":
textSurface = smallfont.render(text, True, color)
elif size == "medium":
textSurface = medfont.render(text, True, color)
elif size == "large":
textSurface = largefont.render(text, True, color)
return textSurface, textSurface.get_rect()
def message_to_screen(msg,color, y_displace=0, size = "small"):
textSurf, textRect = text_objects(msg,color, size)
textRect.center = (display_width / 2), (display_height / 2)+y_displace
gameDisplay.blit(textSurf, textRect)
def gameLoop():
global direction
direction = 'right'
gameExit = False
gameOver = False
lead_x = display_width/2
lead_y = display_height/2
lead_x_change = 10
lead_y_change = 0
snakeList = []
snakeLength = 1
randAppleX,randAppleY = randAppleGen()
while not gameExit:
if gameOver == True:
message_to_screen("Game over",
red,
y_displace=-50,
size="large")
message_to_screen("Press C to play again or Q to quit",
black,
50,
size="medium")
pygame.display.update()
while gameOver == True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
gameOver = False
gameExit = True
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_q:
gameExit = True
gameOver = False
if event.key == pygame.K_c:
gameLoop()
for event in pygame.event.get():
if event.type == pygame.QUIT:
gameExit = True
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
direction = "left"
lead_x_change = -block_size
lead_y_change = 0
elif event.key == pygame.K_RIGHT:
direction = "right"
lead_x_change = block_size
lead_y_change = 0
elif event.key == pygame.K_UP:
direction = "up"
lead_y_change = -block_size
lead_x_change = 0
elif event.key == pygame.K_DOWN:
direction = "down"
lead_y_change = block_size
lead_x_change = 0
elif event.key == pygame.K_p:
pause()
if lead_x >= display_width or lead_x < 0 or lead_y >= display_height or lead_y < 0:
gameOver = True
lead_x += lead_x_change
lead_y += lead_y_change
gameDisplay.fill(white)
#pygame.draw.rect(gameDisplay, red, [randAppleX, randAppleY, AppleThickness, AppleThickness])
gameDisplay.blit(appleimg, (randAppleX, randAppleY))
snakeHead = []
snakeHead.append(lead_x)
snakeHead.append(lead_y)
snakeList.append(snakeHead)
if len(snakeList) > snakeLength:
del snakeList[0]
for eachSegment in snakeList[:-1]:
if eachSegment == snakeHead:
gameOver = True
snake(block_size, snakeList)
score(snakeLength-1)
pygame.display.update()
if lead_x > randAppleX and lead_x < randAppleX + AppleThickness or lead_x + block_size > randAppleX and lead_x + block_size < randAppleX + AppleThickness:
if lead_y > randAppleY and lead_y < randAppleY + AppleThickness:
randAppleX,randAppleY = randAppleGen()
snakeLength += 1
elif lead_y + block_size > randAppleY and lead_y + block_size < randAppleY + AppleThickness:
randAppleX,randAppleY = randAppleGen()
snakeLength += 1
clock.tick(FPS)
pygame.quit()
quit()
game_intro()
gameLoop()