📌  相关文章
📜  Python|在 PyGame 中使对象跳转

📅  最后修改于: 2022-05-13 01:54:37.820000             🧑  作者: Mango

Python|在 PyGame 中使对象跳转

Pygame 是一组用于编写视频游戏的跨平台Python模块。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。现在，这取决于开发者的想象力或必要性，他/她想使用这个工具包开发什么类型的游戏。
因此，在本文中，我们将学习如何使用Python中的 PyGame 库进行对象跳转。

经典力学中有一个基本公式可以使物体跳跃。 

F = 1/2 * m * v^2

其中 F 是向上/向下的力，m 是物体的质量，v 是速度。速度会随着时间的推移而下降，因为当对象跳跃时，在此模拟中速度不会增加更多。当物体到达地面时，跳跃结束。如果isjump变量为 True 或 False，则表明对象是否在跳跃。如果isjump为 True，则对象位置将根据上述公式进行更新。

下面是实现： 
# import pygame module in this program 
import pygame
   
# activate the pygame library . 
# initiate pygame and give permission 
# to use pygame's functionality. 
pygame.init()
   
# create the display surface object 
# of specific dimension..e(500, 500). 
win = pygame.display.set_mode((500, 500))
   
# set the pygame window name 
pygame.display.set_caption("Jump Game")
   
# object current co-ordinates
x = 200
y = 200
   
# dimensions of the object
width = 30
height = 40
   
# Stores if player is jumping or not
isjump = False
   
# Force (v) up and mass m.
v = 5
m = 1
   
# Indicates pygame is running
run = True
   
# infinite loop
while run:
   
    # completely fill the surface object 
    # with black colour 
    win.fill((0, 0, 0))
   
    # drawing object on screen which is rectangle here 
    pygame.draw.rect(win, (255, 0, 0), (x, y, width, height))
       
    # iterate over the list of Event objects 
    # that was returned by pygame.event.get() method. 
    for event in pygame.event.get():
           
        # if event object type is QUIT 
        # then quitting the pygame 
        # and program both. 
        if event.type == pygame.QUIT:
               
            # it will make exit the while loop
            run = False
    # stores keys pressed
    keys = pygame.key.get_pressed()
        
    if isjump == False:
   
        # if space bar is pressed
        if keys[pygame.K_SPACE]:
                  
            # make isjump equal to True
            isjump = True
               
    if isjump :
        # calculate force (F). F = 1 / 2 * mass * velocity ^ 2.
        F =(1 / 2)*m*(v**2)
           
        # change in the y co-ordinate
        y-= F
           
        # decreasing velocity while going up and become negative while coming down
        v = v-1
           
        # object reached its maximum height
        if v<0:
               
            # negative sign is added to counter negative velocity
            m =-1
   
        # objected reaches its original state
        if v ==-6:
   
            # making isjump equal to false 
            isjump = False
  
     
            # setting original values to v and m
            v = 5
            m = 1
       
    # creates time delay of 10ms
    pygame.time.delay(10)
   
    # it refreshes the window
    pygame.display.update() 
# closes the pygame window    
pygame.quit()

输出 ：