Chapter4_BouningBall.py

import pygame
import random

pygame.init()

WIDTH=800
HEIGHT=600
screen=pygame.display.set_mode((WIDTH,HEIGHT))
pygame.display.set_caption("Bouning Ball")

running=True
clock=pygame.time.Clock()

#Step-2 Ball Variables
x=100
y=100
radius=20

#speed of ball
x_speed=5
y_speed=5

while running:
    screen.fill((0,0,0))

    for event in pygame.event.get():
        if event.type==pygame.QUIT:
            running=False
    
    #moving logic
    x=x+x_speed
    y=y+y_speed

    #Bouncing Logic
    #left/right handle
    if x-radius <= 0 or x+radius>=WIDTH:
         x_speed=-x_speed
    #top/bottom handle
    if y-radius <=0 or y+radius >=HEIGHT:
        y_speed=-y_speed
    
    #draw circle
    color=(random.randint(0,255),random.randint(0,255),random.randint(0,255))
    pygame.draw.rect(screen, (255, 255, 255), (350, 550, 100, 20), 2)
    pygame.draw.circle(screen,color,(x,y),radius)

    pygame.display.update()

    clock.tick(60)  #fps

pygame.quit()