CODEWITHSUNDEEP
pythonpygame
thankyoustack
thankyoustack

Reputation: 35

How do I animate my window background color?

I want to fill my window with a uniform color that slowly changes in each frame.

import pygame
import random
pygame.init()
screen = pygame.display.set_mode([400,400])

color = random.randint(0,255)

screen.fill((color))

r_color=10
r_color_change=5

animating=True
while animating:

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            animating = False

    r_color += r_color_change
    if r_color > 255 or r_color < 0:
        r_color_change *= -1

    pygame.display.flip()

Upvotes: 1

Views: 373

Answers (1)

Rabbid76
Rabbid76

Reputation: 210948

A color consists of 3 color channels, red, green and blue. (see RGB color model). You need to continuously fill the entire screen with the new color in the application loop:

animating=True 
while animating:
    # [...]
    
    screen.fill((r_color, 0, 0))

Additionally you should clam the r_color value to the range [0, 255]:

screen.fill((r_color, 0, 0))

And control the frames per second with pygame.time.Clock.tick:

clock = pygame.time.Clock()
animating=True 
while animating:
    clock.tick(60)

    # [...]

Complete example:

import pygame 
import random 

pygame.init() 
screen = pygame.display.set_mode([400,400])
clock = pygame.time.Clock()

r_color = random.randint(0,255)
r_color_change=5

animating=True 
while animating:
    clock.tick(60)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            animating = False

    r_color += r_color_change
    if r_color > 255 or r_color < 0:
        r_color_change *= -1
    r_color = max(0, min(255, r_color))

    screen.fill((r_color, 0, 0))
    pygame.display.flip()

Upvotes: 3

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