5. Sounds and Sprites

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# Sprites

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import pygame

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import random

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# GLOBAL VARIABLES

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COLOR = pygame.color.Color(255, 100, 98)

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SURFACE_COLOR = pygame.color.Color(167, 255, 100)

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WIDTH = 500

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HEIGHT = 300

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# Object class

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class Sprite(pygame.sprite.Sprite):

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   def __init__(self, color, height, width):

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      super().__init__()

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      self.image = pygame.Surface([width, height])

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      self.image.fill(SURFACE_COLOR)

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      self.image.set_colorkey(COLOR)

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      pygame.draw.rect(self.image,color,pygame.Rect(0, 0, width, height))

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      self.rect = self.image.get_rect()

Activity: 5.1 ActiveCode (ac_l60_5_en)

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# Sounds

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from pygame import mixer

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# Starting the mixer

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mixer.init()

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# Loading the song

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mixer.music.load("../../audio/Example04_Tour01_Line01.wav")

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# Setting the volume

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mixer.music.set_volume(0.7)

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# Start playing the song

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mixer.music.play()

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Activity: 5.2 ActiveCode (ac_l60_5_en1_en)

# set up the block data structure
player = pygame.Rect(300,100,40,40)
playerImage = pygame.image.load('player.png')
plyaerStretchedImage = pygame.transform.scale(playerImage(40,40))
foodImage = pygame.image.load('cherry.png')
foods = []
for i in range(20):
   foods.append(pygame.Rect(random.randint(0,WINDOWWIDTH - 20),random.randint(0,WINDOWHEIGHT - 20),20,20))

• Player.png appears in the desired scale

• Generate 20 initial cherries randomly

# set up music

pickUpSound = pygame.mixer.Sound('pickup.wav')
pygame.mixer.music.load('background.mid')
pygame.mixer.music.play(-1,0.0)
musicPlaying = True

• Use two channels, one for background music and one for each picked cherry

if event.key == ord('m'):
   if musicPlaying:
      pygame.mixer.music.stop()
   else:
      pygame.mixer.music.play(-1,0,0)
   musicPlaying = not musicPlaying

if event.type == MOUSEBUTTONUP:
   foods.append(pygame.Rect(event.pos[0]-10,event.pos[1] - 10,20,20))

• Key ‘m’ pauses or resumes background music and mouse click plants a cherry at clicked position

foodCounter += 1
if foodCounter >= NEWFOOD:
   #add new food
   foodCounter = 0
   foods.append(pygame.Rect(random.randint(0,WINDOWWIDTH-20),random.randint(0,WINDOWHEIGHT - 20),20,20))

• Cherries are randomly generated with each pass in the main loop. principal

# check if the block has intersected with any food squares.
for food in foods[:]:
   if player.colliderect(food):
      foods.remove(food)
      player = pygame.Rect(player.left,player.top,player.right,player.down)
      playerStretchedImage = pygame.transform.scale(player.left,player.top,player.right,player.down)
      if musicPlaying:
         pickUpSound.play()

# draw the food
for food in foods:
   windowSurface.blit(foodImage,food)

• Remove “eaten” cherries, of course bulking up!

• All blits appear in the update

• FPS == Frames Per Second

• Variable that controls the mainClock.tick()

• The monsters have a minimum and maximum size and their speed is controlled

if baddieAddCounter == ADDNEWBADDIERATE:
   baddieAddCounter = 0
   baddieSize = random.randint(BADDIEMINSIZE,BADDIEMAXSIZE)
   newBaddie = {'rect':pygame.Rect(random.randint(0,WINDOWWIDTH-baddieSize),0-baddieSize,baddieSize,baddieSize),'speed':random.randint(BADDIEMINSPEED,BADDIEMAXSPEED),'surface':pygame.transform.scale(baddieImage,(baddieSize,baddieSize))}

   baddies.append(newBaddie)

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