如何在 Pygame 中移动你的游戏字符

先决条件： Pygame

Pygame是一组跨平台的Python模块，专为编写视频游戏而设计。它包括旨在与Python编程语言一起使用的计算机图形和声音库。您可以使用 pygame 创建不同类型的游戏，包括街机游戏、平台游戏等等。

使用中的图像：

您可以控制玩家的移动。为此，首先使用 pygame 的 display.set_mode() 方法创建一个显示表面对象，并使用 pygame 的 image.load() 方法添加玩家的精灵。 set_mode()函数用于初始化显示表面或窗口。 size 参数是一对代表宽度和高度的数字。 flags 参数是附加选项的集合。 depth 参数表示用于颜色的位数。

句法：

set_mode(size=(0, 0), flags=0, depth=0, display=0, vsync=0) 

创建一个变量来存储玩家的速度。设置玩家的初始坐标。现在，根据键盘事件（即键状态改变时发生的事件）更改播放器的 x 和 y 坐标。

blit(surface,surfacerect)函数用于在屏幕上绘制图像。

句法：

blit(surface, surfacerect)

为了从队列中收集所有事件，使用事件模块的 get()函数，然后我们使用 for 循环迭代所有事件。

句法：

get(eventtype=None)

使用显示模块的 update()函数更新屏幕。

句法：

update(rectangle=None)

下面是实现。

示例：玩家移动程序

Python3

# Importing pygame module
import pygame
from pygame.locals import *
  
# initiate pygame and give permission
# to use pygame's functionality.
pygame.init()
  
# create the display surface object
# of specific dimension.
window = pygame.display.set_mode((600, 600))
  
# Add caption in the window
pygame.display.set_caption('Player Movement')
  
# Add player sprite
image = pygame.image.load(r'Player_image.png')
  
  
# Store the initial
# coordinates of the player in
# two variables i.e. x and y.
x = 100
y = 100
  
# Create a variable to store the
# velocity of player's movement
velocity = 12
  
# Creating an Infinite loop
run = True
while run:
  
    # Filling the background with
    # white color
    window.fill((255, 255, 255))
  
    # Display the player sprite at x
    # and y coordinates
    window.blit(image, (x, y))
  
    # iterate over the list of Event objects
    # that was returned by pygame.event.get()
    # method.
    for event in pygame.event.get():
  
        # Closing the window and program if the
        # type of the event is QUIT
        if event.type == pygame.QUIT:
            run = False
            pygame.quit()
            quit()
  
        # Checking event key if the type
        # of the event is KEYDOWN i.e.
        # keyboard button is pressed
        if event.type == pygame.KEYDOWN:
  
            # Decreasing the x coordinate
            # if the button pressed is
            # Left arrow key
            if event.key == pygame.K_LEFT:
                x -= velocity
  
            # Increasing the x coordinate
            # if the button pressed is
            # Right arrow key
            if event.key == pygame.K_RIGHT:
                x += velocity
  
            # Decreasing the y coordinate
            # if the button pressed is
            # Up arrow key
            if event.key == pygame.K_UP:
                y -= velocity
  
            # Increasing the y coordinate
            # if the button pressed is
            # Down arrow key
            if event.key == pygame.K_DOWN:
                y += velocity
  
        # Draws the surface object to the screen.
        pygame.display.update()

输出：

玩家也可以连续移动。为此，除了要进行一些更改外，其他一切都保持不变。在这里，我们创建了一个新的时钟对象来使用 clock() 控制游戏的帧速率。

句法：

Clock()

创建一个新变量（名为 key_pressed_is）来存储用户按下的键。为此，我们使用 key 模块的 get_pressed()函数。

句法：

get_pressed()

它返回一个布尔值序列，表示键盘上每个键的状态。

示例：在连续移动中移动玩家

蟒蛇3

# Importing pygame module
import pygame
from pygame.locals import *
  
# initiate pygame and give permission
# to use pygame's functionality.
pygame.init()
  
# create the display surface object
# of specific dimension.
window = pygame.display.set_mode((600, 600))
  
# Add caption in the window
pygame.display.set_caption('Player Movement')
  
# Initializing the clock
# Clocks are used to track and
# control the frame-rate of a game
clock = pygame.time.Clock()
  
# Add player sprite
image = pygame.image.load(r'Player_image.png')
  
  
# Store the initial
# coordinates of the player in
# two variables i.e. x and y.
x = 100
y = 100
  
# Create a variable to store the
# velocity of player's movement
velocity = 12
  
# Creating an Infinite loop
run = True
while run:
  
    # Set the frame rates to 60 fps
    clock.tick(60)
  
    # Filling the background with
    # white color
    window.fill((255, 255, 255))
  
    # Display the player sprite at x
    # and y coordinates
    window.blit(image, (x, y))
  
    # iterate over the list of Event objects
    # that was returned by pygame.event.get() method.
    for event in pygame.event.get():
  
        # Closing the window and program if the
        # type of the event is QUIT
        if event.type == pygame.QUIT:
            run = False
            pygame.quit()
            quit()
  
    # Storing the key pressed in a
    # new variable using key.get_pressed()
    # method
    key_pressed_is = pygame.key.get_pressed()
  
    # Changing the coordinates
    # of the player
    if key_pressed_is[K_LEFT]:
        x -= 8
    if key_pressed_is[K_RIGHT]:
        x += 8
    if key_pressed_is[K_UP]:
        y -= 8
    if key_pressed_is[K_DOWN]:
        y += 8
  
    # Draws the surface object to the screen.
    pygame.display.update()

输出：

翻转玩家精灵

您可以使用 pygame 的转换模块的 flip()函数轻松翻转任何精灵。例如，如果我们想在玩家改变移动方向时翻转精灵，那么我们可以使用下面的代码

window.blit(pygame.transform.flip(image, False, True), (x,y))

翻转（）的F结高墙水平翻转表面对象，垂直。或两者。这个函数有三个参数：

• 要翻转的图像
• 进行水平翻转的布尔值
• 进行垂直翻转的布尔值

下面是实现。

示例：翻转播放器图像

蟒蛇3

# Importing pygame module
import pygame
from pygame.locals import *
  
# initiate pygame and give permission
# to use pygame's functionality.
pygame.init()
  
# create the display surface object
# of specific dimension.
window = pygame.display.set_mode((600, 600))
  
# Add caption in the window
pygame.display.set_caption('Player Movement')
  
# Initializing the clock
# Clocks are used to track and
# control the frame-rate of a game
clock = pygame.time.Clock()
  
# creating a variable to check the direction
# of movement
# We will change its value whenever
# the player changes its direction
direction = True
  
  
# Add player sprite
image = pygame.image.load(r'Player_image.png')
  
  
# Store the initial
# coordinates of the player in
# two variables i.e. x and y.
x = 100
y = 100
  
# Create a variable to store the
# velocity of player's movement
velocity = 12
  
# Creating an Infinite loop
run = True
while run:
  
    # Set the frame rates to 60 fps
    clock.tick(60)
  
    # Filling the background with
    # white color
    window.fill((255, 255, 255))
  
    # Display the player sprite at x
    # and y coordinates
    # Flipping the player sprite if player
    # changes the direction
    if direction == True:
        window.blit(image, (x, y))
    if direction == False:
        window.blit(pygame.transform.flip(image, True, False), (x, y))
  
    # iterate over the list of Event objects
    # that was returned by pygame.event.get() method.
    for event in pygame.event.get():
  
        # Closing the window and program if the
        # type of the event is QUIT
        if event.type == pygame.QUIT:
            run = False
            pygame.quit()
            quit()
  
        # Changing the value of the
        # direction variable
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_RIGHT:
                direction = True
            elif event.key == pygame.K_LEFT:
                direction = False
  
    # Storing the key pressed in a
    # new variable using key.get_pressed()
    # method
    key_pressed_is = pygame.key.get_pressed()
  
    # Changing the coordinates
    # of the player
    if key_pressed_is[K_LEFT]:
        x -= 5
    if key_pressed_is[K_RIGHT]:
        x += 5
    if key_pressed_is[K_UP]:
        y -= 5
    if key_pressed_is[K_DOWN]:
        y += 5
  
    # Draws the surface object to the screen.
    pygame.display.update()

输出：

我们还可以通过创建精灵列表轻松更新玩家精灵。

image = [pygame.image.load(r’Player_image1.png’),

         pygame.image.load(r’Player_image2.png’)]

示例：更新精灵

蟒蛇3

# Importing pygame module
import pygame
from pygame.locals import *
  
# initiate pygame and give permission
# to use pygame's functionality.
pygame.init()
  
# create the display surface object
# of specific dimension.
window = pygame.display.set_mode((600, 600))
  
# Add caption in the window
pygame.display.set_caption('Player Movement')
  
# Initializing the clock
# Clocks are used to track and
# control the frame-rate of a game
clock = pygame.time.Clock()
  
# creating a variable to check the direction
# of movement
# We will change its value whenever
# the player changes its direction
direction = True
  
  
# Add player sprites in a list
image = [pygame.image.load(r'Player_image1.png'),
         pygame.image.load(r'Player_image2.png')]
  
  
# Store the initial
# coordinates of the player in
# two variables i.e. x and y.
x = 100
y = 100
  
# Create a variable to store the
# velocity of player's movement
velocity = 12
  
# Creating an Infinite loop
run = True
while run:
  
    # Set the frame rates to 60 fps
    clock.tick(60)
  
    # Filling the background with
    # white color
    window.fill((255, 255, 255))
  
    # Display the player sprite at x
    # and y coordinates
    # Changing the player sprite if player
    # changes the direction
    if direction == True:
        window.blit(image[0], (x, y))
    if direction == False:
        window.blit(image[1], (x, y))
  
    # iterate over the list of Event objects
    # that was returned by pygame.event.get() method.
    for event in pygame.event.get():
  
        # Closing the window and program if the
        # type of the event is QUIT
        if event.type == pygame.QUIT:
            run = False
            pygame.quit()
            quit()
  
        # Changing the value of the
        # direction variable
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_RIGHT:
                direction = True
            elif event.key == pygame.K_LEFT:
                direction = False
  
    # Storing the key pressed in a
    # new variable using key.get_pressed()
    # method
    key_pressed_is = pygame.key.get_pressed()
  
    # Changing the coordinates
    # of the player
    if key_pressed_is[K_LEFT]:
        x -= 5
    if key_pressed_is[K_RIGHT]:
        x += 5
    if key_pressed_is[K_UP]:
        y -= 5
    if key_pressed_is[K_DOWN]:
        y += 5
  
    # Draws the surface object to the screen.
    pygame.display.update()

输出：