Ενότητα 6 - Τμήμα 2 - Συναρτήσεις και Σχέδια

6.2.4 - Snowmen code analysed

Review the code line by line to understand the use of every command. You can download the code from here.
'''
ELLAK - Python course
Snowmen
 
'''
import pygame
 
# Define some colors
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)
GREEN = (0, 255, 0)
RED = (255, 0, 0)
ORANGE = (250, 147, 30)
BLUE = (0, 0, 255)
BROWN = (70, 25, 0)


def draw_snowman(screen, x, y):
   # Draw a circle for the head
    pygame.draw.circle(screen, WHITE, [60 + x, 50 + y], 15)
   # Draw the middle snowman circle
    pygame.draw.circle(screen, WHITE, [60 + x, 80 + y], 20)
   # Draw the bottom snowman circle
    pygame.draw.circle(screen, WHITE, [60 + x, 120 + y], 30)
   # Draw the buttons
    pygame.draw.circle(screen, BLACK, [60 + x, 120 + y], 6)
   pygame.draw.circle(screen, RED, [60 + x, 120 + y], 4)
   pygame.draw.circle(screen, BLACK, [60 + x, 100 + y], 6)
   pygame.draw.circle(screen, RED, [60 + x, 100 + y], 4)
   pygame.draw.circle(screen, BLACK, [60 + x, 80 + y], 6)
   pygame.draw.circle(screen, RED, [60 + x, 80 + y], 4)
   #Draw the hat
    pygame.draw.rect(screen, BROWN, [45 + x, 8 + y, 30,30])
   pygame.draw.rect(screen, BROWN, [30 + x, 34 + y, 60,5])
   #Draw the eyes
    pygame.draw.circle(screen, BLACK, [54 + x, 44 + y], 3)
   pygame.draw.circle(screen, BLACK, [66 + x, 44 + y], 3)
   #Draw the mouth
    pygame.draw.arc(screen, RED, [50 + x, 40 + y, 20, 20] , 3.34, 6.08,3)
   #Draw the nose
    pygame.draw.polygon(screen, ORANGE, [[58 + x , 46 + y], [60 + x , 54 + y], [72 + x, 60 + y]], 0)
    
pygame.init()
 
# Set the width and height of the screen [width, height]
size = (700, 500)
screen = pygame.display.set_mode(size)
 
pygame.display.set_caption("ELLAK - Snowmen")
 
# Loop until the user clicks the close button.
done = False
 
# Used to manage how fast the screen updates
clock = pygame.time.Clock()
 
# -------- Main Program Loop -----------
while not done:
    # --- Main event loop
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            done = True
 
    # --- Game logic should go here
 
    # --- Screen-clearing code goes here
 
    # Here, we clear the screen to white. Don't put other drawing commands
    # above this, or they will be erased with this command.
 
    # If you want a background image, replace this clear with blit'ing the
    # background image.
    screen.fill(BLACK)
 
    # --- Drawing code should go here
    # Snowman in upper left
    for i in range(9):
        for j in range(3):
            draw_snowman(screen, 70*i, 160*j)
 
 
    # --- Go ahead and update the screen with what we've drawn.
    pygame.display.flip()
 
    # --- Limit to 60 frames per second
    clock.tick(60)
 
# Close the window and quit.
pygame.quit()