Not everybody must have witnessed Snowfall personally but wait a minute, What if you can see the snowfall right on your screen by just a few lines of creativity and Programming.
Before starting the topic, it is highly recommended revising the basics of Pygame.
Steps for snowfall creation
1. Importing modules
First, we need to import the Pygame module by using the command.
import pygame
Also, along with Pygame, we will also need random module. Python has a built-in module that you can use to make random numbers just by importing random module.
import random
2. Initialize the game engine
It simply means choose the colors you want to use. In programming World, Whatever you can think you can make. At the end of the article, you will find green snowfall on the white background.
# initialize pygame.init() # chosen colours will be used # to display the output WHITE = [ 255 , 255 , 255 ]
GREEN = [ 0 , 255 , 0 ]
|
3. Specify the size of the screen
It can be a new number depending upon the resolution of your system.
# specify the size SIZE = [ 400 , 400 ]
screen = pygame.display.set_mode(SIZE)
|
4. Assign a name to your snowfall window screen
The name given can be seen on the left corner of the output window.
# caption for output window pygame.display.set_caption( "Programming World of GFG" )
|
5. Create an empty array for your snowfall
snowFall = []
|
6. Looping to get snowfall positions
Make a loop and run to 50 times and add a snowfall in a random x,y position using random Module.
for i in range ( 50 ):
x = random.randrange( 0 , 400 )
y = random.randrange( 0 , 400 )
snowFall.append([x, y])
|
7. Track time
Create an object to help track time
# object to track time clock = pygame.time.Clock()
|
8. Set criteria for snowfall occurrence
Snowfall should occur until the user presses the close button and for this inside while loop, use a for loop.
# loop till the close button is pressed done = False
while not done:
# User did something
for event in pygame.event.get():
# If user clicked close
if event. type = = pygame.QUIT:
# Flag that we are done so
# we exit this loop
done = True
|
9. Set the screen background :
screen.fill(WHITE) |
10. Process the snowfall
Now use a for loop to process each Snowfall in the list :
for i in range ( len (snowFall)):
|
11. Draw the snowfall
pygame.draw.circle(screen, GREEN, snowFall[i], 2 )
|
12. Adding movement
# Move the snowFall down one pixel snowFall[i][ 1 ] + = 1
# If the snowFall has moved off the bottom of the screen
if snowFall[i][ 1 ] > 400 :
# Reset it just above the top
y = random.randrange( - 50 , - 10 )
snowFall[i][ 1 ] = y
# Give it a new x position
x = random.randrange( 0 , 400 )
snowFall[i][ 0 ] = x
# Go ahead and update the screen with what we've drawn.
pygame.display.flip()
clock.tick( 20 )
pygame.quit() |
And Yes, Green snowfall has started!!
Complete Program
import pygame
import random
pygame.init() WHITE = [ 255 , 255 , 255 ]
GREEN = [ 0 , 255 , 0 ]
SIZE = [ 400 , 400 ]
screen = pygame.display.set_mode(SIZE)
pygame.display.set_caption( "Programming World of GFG" )
snowFall = []
for i in range ( 50 ):
x = random.randrange( 0 , 400 )
y = random.randrange( 0 , 400 )
snowFall.append([x, y])
clock = pygame.time.Clock()
done = False
while not done:
for event in pygame.event.get():
if event. type = = pygame.QUIT:
done = True
screen.fill(WHITE)
for i in range ( len (snowFall)):
pygame.draw.circle(screen, GREEN, snowFall[i], 2 )
snowFall[i][ 1 ] + = 1
if snowFall[i][ 1 ] > 400 :
y = random.randrange( - 50 , - 10 )
snowFall[i][ 1 ] = y
x = random.randrange( 0 , 400 )
snowFall[i][ 0 ] = x
pygame.display.flip()
clock.tick( 20 )
pygame.quit() |
Output