Teach Your Kids To Code: A Parent-friendly Guide to Python Programming

222 Chapter 9

Putting It All Together

Here’s our full SmileyExplosion.py app:

SmileyExplosion.py

import pygame

import random

BLACK = (0,0,0)

pygame.init()

screen = pygame.display.set_mode([800,600])

pygame.display.set_caption("Smiley Explosion")

mousedown = False

keep_going = True

clock = pygame.time.Clock()

pic = pygame.image.load("CrazySmile.bmp")

colorkey = pic.get_at((0,0))

pic.set_colorkey(colorkey)

sprite_list = pygame.sprite.Group()

class Smiley(pygame.sprite.Sprite):

pos = (0,0)

xvel = 1

yvel = 1

scale = 100

def __init__(self, pos, xvel, yvel):

pygame.sprite.Sprite.__init__(self)

self.image = pic

self.scale = random.randrange(10,100)

self.image = pygame.transform.scale(self.image, (self.scale,self.scale))

self.rect = self.image.get_rect()

self.pos = pos

self.rect.x = pos[0] - self.scale/2

self.rect.y = pos[1] - self.scale/2

self.xvel = xvel

self.yvel = yvel

def update(self):

self.rect.x += self.xvel

self.rect.y += self.yvel

if self.rect.x <= 0 or self.rect.x > screen.get_width() - self.scale:

self.xvel = -self.xvel

if self.rect.y <= 0 or self.rect.y > screen.get_height() - self.scale:

self.yvel = -self.yvel