我正在编写我的第一个pygame程序，并试图创建一个Snake游戏。我拥有的当前代码几乎可以完全正常运行，但是弯折的蛇是有缺陷的。我要做的是在按下方向键时存储蛇头的位置，并且一旦它们的坐标等于存储的头坐标，就基本上改变了Snake对象列表中每个块的坐标。照原样，一旦我单击方向键，蛇就会变成一个单独的块。我认为这是因为蛇没有连续运动。我需要连续单击方向键以使蛇移动。我的代码可能不是最干净/最好的实现，但是我现在可以这样做。这是整个代码的链接-https://github.com/Denizhan-Yigitbas/Snake
这是我的Snake课，基本上使身体部位：
import pygame
class Snake(pygame.sprite.Sprite):
# TODO: Make Snake a chain of Blocks
def __init__(self, color, width, height, positionX, positionY):
# Call the parent class (Sprite) constructor
pygame.sprite.Sprite.__init__(self)
# Create an image of the block, and fill it with a color.
# This could also be an image loaded from the disk.
self.image = pygame.Surface([width, height])
self.image.fill(color)
# Fetch the rectangle object that has the dimensions of the image
# Update the position of this object by setting the values of rect.x and rect.y
self.rect = self.image.get_rect()
# set the position of the snake
self.rect.x = positionX
self.rect.y = positionY
# set the inputs the usable variables for later code
self.color = color
self.width = width
self.height = height
"""
Method the will change the direction of the Snake towards the left
"""
def moveLeft(self):
newX = self.rect.x - 10
return Snake(self.color, self.width, self.height, newX, self.rect.y)
"""
Method that will change the direction of the Snake toward the right
"""
def moveRight(self):
newX = self.rect.x + 10
return Snake(self.color, self.width, self.height, newX, self.rect.y)
"""
Method that will change the direction of the Snake to go upward
"""
def moveUp(self):
newY = self.rect.y - 10
return Snake(self.color, self.width, self.height, self.rect.x, newY)
"""
Method that will change the direction of the Snake to go downward
"""
def moveDown(self):
newY = self.rect.y + 10
return Snake(self.color, self.width, self.height, self.rect.x, newY)
这是我的食品课：
import pygame
import random
"""
Class to create a Food at a random coordinate
"""
class Food(pygame.sprite.Sprite):
def __init__(self, color, width, height):
# Call the parent class (Sprite) constructor
pygame.sprite.Sprite.__init__(self)
# Create an image of the block, and fill it with a color.
# This could also be an image loaded from the disk.
self.image = pygame.Surface([width, height])
self.image.fill(color)
# Fetch the rectangle object that has the dimensions of the image
# Update the position of this object by setting the values of rect.x and rect.y
self.rect = self.image.get_rect()
# set the position of the Food
# TODO: change values in randint to use the input width and height
randX = random.randint(0, 39) * 10
randY = random.randint(0, 39) * 10
self.rect.x = randX
self.rect.y = randY
这是我运行游戏的App类：
import pygame
from pygame.locals import *
from Classes.Snake import *
from Classes.Food import *
from Classes.Block import *
RED = (255, 0, 0)
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
class App:
def __init__(self):
self._running = True
self._display_surf = None
self.size = self.weight, self.height = 400, 400
# Initial Snake array with 3 Snake Blocks starting at (50, 50) and going left
self.snake = [Snake(WHITE, 10, 10, 50, 50), Snake(WHITE, 10, 10, 40, 50), Snake(WHITE, 10, 10, 30, 50)]
def on_init(self):
pygame.init()
self._display_surf = pygame.display.set_mode(self.size, pygame.HWSURFACE | pygame.DOUBLEBUF)
self._display_surf.fill(BLACK)
self._running = True
# Create Score Board
self.score = 0
self.displayScore(self.score, 30)
# Create Initial Food
self.initFood = Food(RED, 10, 10)
self._display_surf.blit(self.initFood.image, self.initFood.rect)
# display the initial Snake array
for i in range(len(self.snake)):
self._display_surf.blit(self.snake[i].image, self.snake[i].rect)
pygame.display.update()
"""
Helper Method that will run the events that are clicked on by the user
"""
def on_event(self):
# Checks if Snake crashes with itself - LOSE
for i in range(1, len(self.snake)):
if pygame.sprite.collide_rect(self.snake[0], self.snake[i]):
pygame.quit()
# Checks if Snake goes off the board
if self.snake[0].rect.x == -10 or self.snake[0].rect.x == 400:
self.message_display("LOSE")
# pygame.quit()
if self.snake[0].rect.y == -10 or self.snake[0].rect.y == 400:
pygame.quit()
# Checks if Snake eats Food - LOSE
if pygame.sprite.collide_rect(self.snake[0], self.initFood):
# Erases the current screen
self._display_surf = pygame.display.set_mode(self.size, pygame.HWSURFACE | pygame.DOUBLEBUF)
self._display_surf.fill(BLACK)
# Create a new Food at random location and display it
self.initFood = Food(RED, 10, 10)
# Create Score Board
self.score += 1
self.displayScore(self.score, 30)
# Store the last and second to last blocks of the snake
lastSnakeBlock = self.snake[-1]
secondToLastBlock = self.snake[-2]
# if the last two blocks are on the same horizontal line and the last block is to the left of the
# second to last block, add a block to the left side of the last block
if lastSnakeBlock.rect.y == secondToLastBlock.rect.y and lastSnakeBlock.rect.x < secondToLastBlock.rect.x:
newX = lastSnakeBlock.rect.x - 10
newSnakeBlock = Snake(lastSnakeBlock.color, lastSnakeBlock.width, lastSnakeBlock.height, newX,
lastSnakeBlock.rect.y)
self.snake.append(newSnakeBlock)
# if the last two blocks are on the same horizontal line and the last block is to the right of the
# second to last block, add a block to the right side of the last block
if lastSnakeBlock.rect.y == secondToLastBlock.rect.y and lastSnakeBlock.rect.x > secondToLastBlock.rect.x:
newX = lastSnakeBlock.rect.x + 10
newSnakeBlock = Snake(lastSnakeBlock.color, lastSnakeBlock.width, lastSnakeBlock.height, newX,
lastSnakeBlock.rect.y)
self.snake.append(newSnakeBlock)
# if the last two blocks are on the same vertical line and the last block is above the
# second to last block, add a block above the last block
if lastSnakeBlock.rect.x == secondToLastBlock.rect.x and lastSnakeBlock.rect.y < secondToLastBlock.rect.y:
newY = lastSnakeBlock.rect.y - 10
newSnakeBlock = Snake(lastSnakeBlock.color, lastSnakeBlock.width, lastSnakeBlock.height,
lastSnakeBlock.rect.x, newY)
self.snake.append(newSnakeBlock)
# if the last two blocks are on the same vertical line and the last block is below the
# second to last block, add a block below the last block
if lastSnakeBlock.rect.x == secondToLastBlock.rect.x and lastSnakeBlock.rect.y > secondToLastBlock.rect.y:
newY = lastSnakeBlock.rect.y + 10
newSnakeBlock = Snake(lastSnakeBlock.color, lastSnakeBlock.width, lastSnakeBlock.height,
lastSnakeBlock.rect.x, newY)
self.snake.append(newSnakeBlock)
for i in range(len(self.snake)):
self._display_surf.blit(self.snake[i].image, self.snake[i].rect)
for event in pygame.event.get():
if event.type == pygame.QUIT:
self._running = False
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
print("LEFT")
xCoord = self.snake[0].rect.x
yCoord = self.snake[0].rect.y
# Reset the Board
self.boardReset()
# Store the length of the snake
currentLength = len(self.snake)
# Loop to make points follow the head
for i in range(len(self.snake)):
if self.snake[i].rect.x == xCoord and self.snake[i].rect.y == yCoord:
newSnake = self.snake[i].moveLeft()
# append new Snake into list instead of old
self.snake.append(newSnake)
# removes old snake blocks
for i in range(currentLength):
self.snake.pop(0)
# displays the shifted snake Blocks
for i in range(len(self.snake)):
self._display_surf.blit(self.snake[i].image, self.snake[i].rect)
if event.key == pygame.K_RIGHT:
print("RIGHT")
# # get the coordinates of the head of the Snake
xCoord = self.snake[0].rect.x
yCoord = self.snake[0].rect.y
# Reset the Board
self.boardReset()
# Store the length of the snake
currentLength = len(self.snake)
# Loop to make points follow the head
for i in range(len(self.snake)):
if self.snake[i].rect.x == xCoord and self.snake[i].rect.y == yCoord:
newSnake = self.snake[i].moveRight()
# append new Snake into list instead of old
self.snake.append(newSnake)
# removes old snake blocks
for i in range(currentLength):
self.snake.pop(0)
# displays the shifted snake Blocks
for i in range(len(self.snake)):
self._display_surf.blit(self.snake[i].image, self.snake[i].rect)
if event.key == pygame.K_UP:
# # get the coordinates of the head of the Snake
xCoord = self.snake[0].rect.x
yCoord = self.snake[0].rect.y
# Reset the board
self.boardReset()
# Store the length of the snake
currentLength = len(self.snake)
# Loop to make points follow the head
for i in range(len(self.snake)):
if self.snake[i].rect.x == xCoord and self.snake[i].rect.y == yCoord:
newSnake = self.snake[i].moveUp()
# append new Snake into list instead of old
self.snake.append(newSnake)
# removes old snake blocks
for i in range(currentLength):
self.snake.pop(0)
# displays the shifted snake Blocks
for i in range(len(self.snake)):
self._display_surf.blit(self.snake[i].image, self.snake[i].rect)
if event.key == pygame.K_DOWN:
# get the coordinates of the head of the Snake
xCoord = self.snake[0].rect.x
yCoord = self.snake[0].rect.y
# Reset the Board
self.boardReset()
# Store the length of the snake
currentLength = len(self.snake)
for i in range(len(self.snake)):
if self.snake[i].rect.x == xCoord and self.snake[i].rect.y == yCoord:
newSnake = self.snake[i].moveDown()
# append new Snake into list instead of old
self.snake.append(newSnake)
# removes old snake blocks
for i in range(currentLength):
self.snake.pop(0)
# displays the shifted snake Blocks
for i in range(len(self.snake)):
self._display_surf.blit(self.snake[i].image, self.snake[i].rect)
pygame.display.update()
"""
Helper method that displays the current score on the screen.
"""
def displayScore(self, score, size):
font = pygame.font.SysFont("Comic Sans MS", size)
ScoreBoard = font.render("SCORE: {}".format(score), False, (WHITE))
self._display_surf.blit(ScoreBoard, [0, 0])
pygame.display.update()
"""
Helper method that will reset the screen:
Make screen Black
Add the current Food block
Add the current Score
"""
def boardReset(self):
# Erases the current screen
self._display_surf = pygame.display.set_mode(self.size, pygame.HWSURFACE | pygame.DOUBLEBUF)
self._display_surf.fill(BLACK)
# Create Score Board
self.displayScore(self.score, 30)
# Add Food
self._display_surf.blit(self.initFood.image, self.initFood.rect)
def text_objects(self, text, font):
textSurface = font.render(text, True, BLACK)
return textSurface, textSurface.get_rect()
def message_display(self, text):
largeText = pygame.font.Font('freesansbold.ttf', 115)
TextSurf = largeText.render(text, True, BLACK)
TextRect = TextSurf.get_rect()
# TextSurf, TextRect = text_objects(text, largeText)
TextRect.center = ((self.weight / 2), (self.height / 2))
self._display_surf.blit(TextSurf, TextRect)
pygame.display.update()
def on_loop(self):
pass
def on_render(self):
pass
def on_cleanup(self):
pygame.quit()
"""
Game Loop
"""
def on_execute(self):
if self.on_init() == False:
self._running = False
while (self._running):
self.on_event()
self.on_loop()
self.on_render()
self.on_cleanup()
if __name__ == "__main__":
theApp = App()
theApp.on_execute()