Catford Coding Club Course Resource

Python 'Breakout!' code

Week 5

Here's all the code for the platform game, as it should be at the start of Week 4. Your code may not look exactly the same: maybe you used different variable names, put things in a different order, or missed out the comment tags.
Things written in green are the first things to complete today, getting the score to go up, and the lives to go down.
The bits in red will let you display a game over/start screen, which dramatically improves the way the game feels.

# Screen related variables and constants
SCREEN_WIDTH = 400
SCREEN_HEIGHT = 400

# Game related variables and constants
score = 0
lives = 3
game_state = 'ready'

# Variables for the start button 
start_X = 150
start_y = 100
start_w = 100
start_h = 30

# Bat related variables and constants
bat_x = 120
bat_y = 0
bat_vel_x = 0
BAT_W = 60
BAT_H = 15

# Ball related variables and constants
ball_x = 180
ball_y = 50
ball_vel_x = 2
ball_vel_y = 2
BALL_D = 15

# Wall related variables and constants
BRICK_W = 40
BRICK_H = 15
NUM_BRICKS_IN_ROW = 9
NUM_BRICK_ROWS = 4
bricks = []
BRICK_COLOURS = ['red','green','yellow','blue']
BRICK_SCORES = [1, 2, 3, 4]
  
def setup():
  global SCREEN_WIDTH, SCREEN_HEIGHT
  global NUM_BRICKS_IN_ROW, NUM_BRICK_ROWS
  global bricks

  # Create the screen canvas at the specified width and height
  createCanvas(SCREEN_WIDTH,SCREEN_HEIGHT)

  # Set the frame refresh rate
  frameRate(60)

  create_wall()

 

  
def draw():
  global SCREEN_WIDTH, SCREEN_HEIGHT, score, lives, game_state
  global start_button_X, start_button_y, start_button_w, start_button_h
  global ball_x, ball_y, ball_vel_x, ball_vel_y, BALL_D
  global bat_x, bat_y, BAT_W, BAT_H, bat_vel_x
  global BRICK_H,BRICK_H, BRICK_COLOURS, BRICK_SCORES

  # Set the background colour
  background("black")

  # Show score and lives
  textSize(20);
  fill(255);
  text('Score: '+str(score), 10, 374);
  text('Lives: '+str(lives), 320, 374);
    
  
  if game_state == 'ready':
    show_start()


  else:
    if bricks == []:
        create_wall()
    
    #--------------- CHECK COLLISIONS ----------------#
    
    # Check if the BALL has HIT a BRICK in the wall
    for row_index, row in enumerate(bricks):
      for brick_index, brick in enumerate(row):
        x = 4+brick_index*(BRICK_W+4)
        y = 300+row_index*(BRICK_H+2)
        if ball_x > x - BALL_D/2 and ball_x < x + BRICK_W + BALL_D/2:
          if ball_y > y - BALL_D/2 and ball_y < y + BRICK_H + BALL_D/2:
            if brick == 'B':
              bricks[row_index][brick_index] = 'X'
              ball_vel_y = -ball_vel_y
              score += BRICK_SCORES[row_index]
          
    # Check if the BALL has HIT the BAT
    # Check if the ball is within the width of the bat
    if ball_x >= bat_x and ball_x <= (bat_x + BAT_W):
      # Check if the ball has reached the bat
      if ball_y <= BAT_H + BALL_D/2:
        # Send the ball back up the screen
        ball_vel_y = -ball_vel_y
    # Otherwise, check if the ball is below the bat
    elif ball_y < BAT_H:
      # Reset the bat to the starting values
      bat_x = 120
      bat_y = 0
      bat_vel_x = 0
      # Reset the ball to the starting values
      ball_x = 180
      ball_y = 50
      ball_vel_x = 2
      ball_vel_y = 2
      lives -=1
      if lives == 0:
        bricks = []
        game_state = 'ready'
  
    # Check if the BALL has gone off the LEFT or RIGHT of the SCREEN
    if ball_x >= SCREEN_WIDTH - BALL_D/2:
      ball_vel_x = -ball_vel_x
    elif ball_x < BALL_D:
      ball_vel_x = -ball_vel_x
  
    # Check if the BALL has gone off the TOP of the SCREEN
    if ball_y >= SCREEN_HEIGHT - BALL_D/2:
      ball_vel_y = -ball_vel_y
      
  
    # Check if the BAT is going off the SCREEN
    if bat_x > SCREEN_WIDTH - BAT_W:
      bat_x = SCREEN_WIDTH - BAT_W
    elif bat_x < 0:
      bat_x = 0
      
    #--------------- MOVE OBJECTS ----------------#
    
    # Move the bat
    bat_x = bat_x + bat_vel_x
  
    # Move the ball
    ball_x = ball_x + ball_vel_x
    ball_y = ball_y + ball_vel_y
  
    #----------------- DRAW OBJECTS ---------------------#
  
    # Draw the bat on the screen
    fill('white')
    rect(bat_x, bat_y, BAT_W, BAT_H)
  
    # Draw the ball on the screen
    fill('white')
    circle(ball_x,ball_y,BALL_D)
  
    # Draw the bricks on the screen if they are a 'B'
    for row_index, row in enumerate(bricks):
      fill(BRICK_COLOURS[row_index])
      for brick_index, brick in enumerate(row):
        if brick == 'B':  
          rect(4+brick_index*(BRICK_W+4),300+row_index*(BRICK_H+2),BRICK_W,BRICK_H)




def show_start():
  # This function displays a start screen with a clickable button
  global start_X, start_y, start_w, start_h, game_state, score, lives
  
  fill('white')
  textSize(64);
  text('Game Over', 30, 240);
  fill('purple')
  rect(start_X, start_y, start_w, start_h)
  fill('white')
  textSize(20);
  text('Start', start_X+25, start_y+9);
  
  if mouseIsPressed:
    print(mouseX, start_X)
    if mouseX>start_X and mouseX < start_X + start_w:
      if mouseY > start_y and mouseY < start_y + start_h:
        game_state = 'play'
        score = 0
        lives = 3

def create_wall():
  # Create the wall as a list of lists of bricks (ie. 2D array of bricks) named 'B'
  global NUM_BRICKS_IN_ROW, NUM_BRICK_ROWS, bricks
  for j in range(NUM_BRICK_ROWS):
    row = []
    for i in range(NUM_BRICKS_IN_ROW):
      row.append('B')
    bricks.append(row)



  
def keyPressed():
  global bat_vel_x
  
  # Check if the player is moving the bat to the left
  if key == "ArrowLeft":
    # set the velocity of the bat to the left
    bat_vel_x = -2
  # Otherwise check if the player is moving the bat to the right
  elif key == "ArrowRight":
    # set the velocity of the bat of the right
    bat_vel_x = 2
CourseResource

Python 'Breakout!' code

Week 5

Course
Resource
