# Python | Making an object jump in PyGame

• Difficulty Level : Hard
• Last Updated : 19 Feb, 2020

Pygame is a cross-platform set of Python modules designed for writing video games. It includes computer graphics and sound libraries designed to be used with the Python programming language. Now, itâ€™s up to the imagination or necessity of developer, what type of game he/she wants to develop using this toolkit.
So, in this article, we will learn how to make an object jump using PyGame library in Python.

There is basic formula from classical mechanics to make an object jump.

F = 1/2 * m * v^2

Where F is the force up/down, m is the mass of the object and v is the velocity. The velocity goes down over time because when the object jumps the velocity will not increase more in this simulation. When object reaches the ground, the jump ends. If isjump variable is True or False it indicates object is jumping or not. If isjump is True, object position will be updated according to the above formula.

Below is the implementation:

 # 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-ordinatesx = 200y = 200   # dimensions of the objectwidth = 30height = 40   # Stores if player is jumping or notisjump = False   # Force (v) up and mass m.v = 5m = 1   # Indicates pygame is runningrun = True   # infinite loopwhile 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()

Output :

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