How To Create A Bouncing Ball In Python

In this python game tutorial, I want to show you on How To Create A Bouncing Ball In Python Using PyGame.

Which we can learn with the help of example source codes.

So let’s get started…

What is A Ball Game?

Ball games, also called ball sports, are any game or sport that involves a ball.

Games like football, cricket, baseball, basketball, and American football are among these.

Most of these games came from different places and have different rules and histories.

Bouncing Ball Game Project Software Information

Project Name:	Bouncing Ball Game in Python
Abstract:	Bouncing Ball Game was developed In Python using Pygame.
Language Used:	Python Programming Language
Python Version:	2.x or 3.x
Database:	None
Type:	GUI (Graphical User Interface)
Developer:	Angel Jude Suarez

About The Project

A Bouncing Ball is a simple game code in python to use in different python games that use balls. like pong games, basketball games and etc.

Steps On How To Create A Simple Bouncing Ball Game In Python

Here’s a step-by-step guide on how to make a ball bounce off walls in python with source code.

Step 1: Install Libraries

First, we will install all required libraries for the bouncing ball game functions.

import sys, pygame

Step 2: Declaring and Assigning Values To The Variables

Next, we will declare and assign values in different variables.

size = width, height = 500, 400
x, y = 500, 400
moveX, moveY = 0, 0
speed = [moveX, moveY]
black = 0, 0, 0
grey = 246, 246, 246
FullScreen = False

Step 3: Create A Screen Display And Ball Image

Next, we will create a screen display and its sizes and display ball.

screen = pygame.display.set_mode(size, 0, 32)
pygame.display.set_caption('Bouncing ball')
ball = pygame.transform.scale(pygame.image.load('ball.png'), (70, 70))
gravityAcceleration = 0.3
horizontalAcceleration = 0
verticalSpeed = [0, 0]
horizontalSpeed = [0, 0]
ballrect = ball.get_rect()
clock = pygame.time.Clock()

Step 4: Create A Main Function Of The Game

Lastly, we will create a main function of the bouncing ball game in python.

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_f:
                FullScreen = not FullScreen
                if FullScreen:
                    screen = pygame.display.set_mode(size, pygame.HWSURFACE|pygame.FULLSCREEN, 32)
                else:
                    screen = pygame.display.set_mode(size, 0, 32)


    keys = pygame.key.get_pressed()

    # Provide controls from keyboard, even when key is held down
    if keys[pygame.K_LEFT]:
        horizontalSpeed[0] = 0
        horizontalSpeed[1] = -10

    if keys[pygame.K_RIGHT]:
        horizontalSpeed[0] = 0
        horizontalSpeed[1] = 10

    if keys[pygame.K_UP]:
        verticalSpeed[0] = 0
        verticalSpeed[1] = -10

    verticalSpeed[0] = gravityAcceleration + verticalSpeed[1]
    y += verticalSpeed[0]
    verticalSpeed[1] = verticalSpeed[0]

    horizontalSpeed[0] = horizontalAcceleration + horizontalSpeed[1]
    x += horizontalSpeed[0]
    horizontalSpeed[1] = horizontalSpeed[0]

    if x < 0:
        x = 0
        horizontalSpeed = [-horizontalSpeed[0] * 0.7, -horizontalSpeed[1] * 0.7]
    if x > (width- ballrect.right):
        x = width- ballrect.right
        horizontalSpeed = [-horizontalSpeed[0] * 0.7, -horizontalSpeed[1] * 0.7]
    if y < 0:
        y = 0
        verticalSpeed = [0, 0]
    if y > (height - ballrect.bottom):
        y = height - ballrect.bottom
        verticalSpeed = [-verticalSpeed[0] * 0.7, -verticalSpeed[1] * 0.7]
        if (y == (height - ballrect.height)):
            horizontalSpeed = [horizontalSpeed[0] * 0.95, horizontalSpeed[1] * 0.95]


    clock.tick(60)
    screen.fill(grey)
    screen.blit(ball, (x, y))
    pygame.display.update()

Complete Source Code

Here’s the complete source code of Bouncing Ball in Python using Pygame.

import sys, pygame
pygame.init()

size = width, height = 500, 400
x, y = 500, 400
moveX, moveY = 0, 0
speed = [moveX, moveY]
black = 0, 0, 0
grey = 246, 246, 246
FullScreen = False
screen = pygame.display.set_mode(size, 0, 32)
pygame.display.set_caption('Bouncing ball')
ball = pygame.transform.scale(pygame.image.load('ball.png'), (70, 70))
gravityAcceleration = 0.3
horizontalAcceleration = 0
verticalSpeed = [0, 0]
horizontalSpeed = [0, 0]
ballrect = ball.get_rect()
clock = pygame.time.Clock()

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_f:
                FullScreen = not FullScreen
                if FullScreen:
                    screen = pygame.display.set_mode(size, pygame.HWSURFACE|pygame.FULLSCREEN, 32)
                else:
                    screen = pygame.display.set_mode(size, 0, 32)


    keys = pygame.key.get_pressed()

    # Provide controls from keyboard, even when key is held down
    if keys[pygame.K_LEFT]:
        horizontalSpeed[0] = 0
        horizontalSpeed[1] = -10

    if keys[pygame.K_RIGHT]:
        horizontalSpeed[0] = 0
        horizontalSpeed[1] = 10

    if keys[pygame.K_UP]:
        verticalSpeed[0] = 0
        verticalSpeed[1] = -10

    verticalSpeed[0] = gravityAcceleration + verticalSpeed[1]
    y += verticalSpeed[0]
    verticalSpeed[1] = verticalSpeed[0]

    horizontalSpeed[0] = horizontalAcceleration + horizontalSpeed[1]
    x += horizontalSpeed[0]
    horizontalSpeed[1] = horizontalSpeed[0]

    if x < 0:
        x = 0
        horizontalSpeed = [-horizontalSpeed[0] * 0.7, -horizontalSpeed[1] * 0.7]
    if x > (width- ballrect.right):
        x = width- ballrect.right
        horizontalSpeed = [-horizontalSpeed[0] * 0.7, -horizontalSpeed[1] * 0.7]
    if y < 0:
        y = 0
        verticalSpeed = [0, 0]
    if y > (height - ballrect.bottom):
        y = height - ballrect.bottom
        verticalSpeed = [-verticalSpeed[0] * 0.7, -verticalSpeed[1] * 0.7]
        if (y == (height - ballrect.height)):
            horizontalSpeed = [horizontalSpeed[0] * 0.95, horizontalSpeed[1] * 0.95]


    clock.tick(60)
    screen.fill(grey)
    screen.blit(ball, (x, y))
    pygame.display.update()

Download Full Source Code

You can visit this site to download the full source code of Bouncing Ball Game for free.

Conclusion

We have completely discussed a step-by-step process on How To Create A Simple Bouncing Ball In Python, which we learned with the help of source codes. I hope this PyGame Tutorial will help you a lot.