Book Image

Raspberry Pi cookbook for Python programmers

Book Image

Raspberry Pi cookbook for Python programmers

Overview of this book

Table of Contents (18 chapters)
Raspberry Pi Cookbook for Python Programmers
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Creating a bat and ball game


A classic bat and ball game can be created using the drawing tools of canvas and by detecting the collisions of the objects. The user will be able to control the green paddle using the left and right cursor keys to aim the ball at the bricks and hit them until they have all been destroyed.

Control the bat to aim the ball at the bricks

Getting ready

This example requires a screen and keyboard attached to the Raspberry Pi or X11 Forwarding and X server.

How to do it…

Create the following script, bouncingball.py:

#!/usr/bin/python3
# bouncingball.py
import tkinter as TK
import time

VERT,HOREZ=0,1
xTOP,yTOP = 0,1
xBTM,yBTM = 2,3
MAX_WIDTH,MAX_HEIGHT = 640,480
xSTART,ySTART = 100,200
BALL_SIZE=20
RUNNING=True

def close():
  global RUNNING
  RUNNING=False
  root.destroy()
    
def move_right(event):
  if canv.coords(paddle)[xBTM]<(MAX_WIDTH-7):
    canv.move(paddle, 7, 0)

def move_left(event):
  if canv.coords(paddle)[xTOP]>7:
    canv.move(paddle, -7, 0)

def determineDir...