如何在 PyGame 中添加移动平台

先决条件：在 Pygame 中绘图

在本文中，我们将学习如何使用Python的PyGame 将移动平台添加到我们的游戏中。

创建平台

我们可以使用 draw() 方法在 pygame 中轻松创建任何类型的平台。为此，我们将使用 draw.rect()函数创建具有特定宽度和高度的反应。

Syntax: pygame.draw.rect(surface, color, rect, width)

Parameters:

• surface : Here we can pass the surface on which we want to draw our rectangle.
• color : Here we can pass the color for our rectangle.
• rect : Here we can pass the rectangle, position, and dimensions.
• width : Here we can pass the line thickness. we can also create a solid rectangle by changing the value of this width parameter.

代码：

Python3

# Importing the pygame module
import pygame
from pygame.locals import *
 
# Initiate pygame and give permission
# to use pygame's functionality
pygame.init()
 
# Create a display surface object
# of specific dimension
window = pygame.display.set_mode((600,600))
 
# Creating a new clock object to
# track the amount of time
clock = pygame.time.Clock()
 
# Starting coordinates of the platform
x = 100
y = 150
 
# Creating a rect with width
# and height
rect = Rect(x, y, 200, 50)
 
# Creating a boolean variable that
# we will use to run the while loop
run = True
 
# Creating an infinite loop
# to run our game
while run:
 
    # Setting the framerate to 30fps
    clock.tick(30)
 
    # Drawing the rect on the screen using the
    # draw.rect() method
    pygame.draw.rect(window, (255, 0, 0),rect)
     
    # Updating the display surface
    pygame.display.update()
 
    # Filling the window with white color
    window.fill((255,255,255))

输出：

移动平台

为了移动平台，我们可以创建一个带有一些数值的速度变量，我们可以将该速度添加到我们平台的 x 坐标上。之后，如果速度变量的 x 坐标小于 100 或大于或等于 300，我们将乘以 -1。

代码：

蟒蛇3

# Importing the pygame module
import pygame
from pygame.locals import *
 
# Initiate pygame and give permission
# to use pygame's functionality
pygame.init()
 
# Create a display surface object
# of specific dimension
window = pygame.display.set_mode((600,600))
 
 
# Creating a new clock object to
# track the amount of time
clock = pygame.time.Clock()
 
# Variable to store the
# velocity of the platform
platform_vel = 5
 
# Starting coordinates of the platform
x = 100
y = 150
 
# Creating a rect with width
# and height
rect = Rect(x, y, 200, 50)
 
# Creating a boolean variable that
# we will use to run the while loop
run = True
 
 
# Creating an infinite loop
# to run our game
while run:
 
    # Setting the framerate to 30fps
    clock.tick(30)
 
    # Multiplying platform_vel with -1
    # if its x coordinate is less then 100
    # or greater than or equal to 300.
    if rect.left >=300 or rect.left<100:
        platform_vel*= -1
 
    # Adding platform_vel to x
    # coordinate of our rect
    rect.left += platform_vel
 
    # Drawing the rect on the screen using the
    # draw.rect() method
    pygame.draw.rect(window, (255,   0,   0),rect)
 
    # Updating the display surface
    pygame.display.update()
 
    # Filling the window with white color
    window.fill((255,255,255))

输出：

添加玩家精灵和碰撞

现在我们要添加我们的播放器和我们的播放器和平台之间的碰撞。为此，我们使用 colliderect() 方法。

Syntax: pygame.Rect.colliderect(rect1 , rect2)

Parameters: It will take two rects as its parameters.

Returns true if any portion of either rectangle overlap.

如果玩家与平台发生碰撞，那么我们将玩家底部的坐标设置为平台的顶部，然后我们将添加平台速度。我们还创建了一个重力变量。

代码：

蟒蛇3

# Importing the pygame module
import pygame
from pygame.locals import *
 
# Initiate pygame and give permission
# to use pygame's functionality
pygame.init()
 
# Create a display surface object
# of specific dimension
window = pygame.display.set_mode((600,600))
 
# Creating a new clock object to
# track the amount of time
clock = pygame.time.Clock()
 
# Variable to store the
# velocity of the platform
platform_vel = 5
 
# Starting coordinates of the platform
x = 100
y = 150
 
# Starting coordinates for
# player sprite
player_x = 180
player_y = 0
 
# Creating a new variable
# for gravity
gravity = 8
 
# Creating a new rect for player
player_rect = Rect(player_x, player_y, 50, 50)
 
# Creating a rect with width
# and height
rect = Rect(x, y, 200, 50)
 
# Creating a boolean variable that
# we will use to run the while loop
run = True
 
# Creating an infinite loop
# to run our game
while run:
 
    # Setting the framerate to 30fps
    clock.tick(30)
 
    # Multiplying platform_vel with -1
    # if its x coordinate is less then 100
    # or greater than or equal to 300.
    if rect.left >=300 or rect.left<100:
        platform_vel*= -1
 
    # Checking if player is colliding
    # with platform or not using the
    # colliderect() method.
    # It will return a boolean value
    collide = pygame.Rect.colliderect(rect, player_rect)
 
    # If player is colliding with
    # platform then setting coordinate
    # of player bottom equal to top of platorm
    # and adding the platform velocity
    if collide:
        player_rect.bottom = rect.top
        player_rect.left += platform_vel
 
    # Adding platform_vel to x
    # coordinate of our rect
    rect.left += platform_vel
 
    # Adding gravity
    player_rect.top += gravity
 
    # Drawing the rect on the screen using the
    # draw.rect() method
    pygame.draw.rect(window, (255,   0,   0),rect)
 
    # Drawing player rect
    pygame.draw.rect(window, (0,   255,   0),player_rect)
 
    # Updating the display surface
    pygame.display.update()
 
    # Filling the window with white color
    window.fill((255,255,255))

输出：