why doesn't the rectangle move?

Question

I don't get any errors but it doesn't work. I tried so many things but it never moves. I even copied ready scripts sometimes and they didn't move too. Please explain what am i doing wrong. Thanks from now.

import pygame
pygame.init()

screen = pygame.display.set_mode((800, 600))

red = 100
green = 100
blue = 100
top = 265
left = 365
width = 70
height = 70

pygame.draw.rect(screen, [red, green, blue], [left, top, width, height])

running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
    left += 0.1
    pygame.display.flip()

score 0 · Accepted Answer · answered Mar 17 '21 at 15:33

Actually the rectangle does move. However you must draw the rectangle in the application loop:

running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
    left += 0.1

    screen.fill(0) 
    pygame.draw.rect(screen, [red, green, blue], [left, top, width, height])
    pygame.display.flip()

The typical PyGame application loop has to:

handle the events by either pygame.event.pump() or pygame.event.get().
update the game states and positions of objects dependent on the input events and time (respectively frames)
clear the entire display or draw the background
draw the entire scene (blit all the objects)
update the display by either pygame.display.update() or pygame.display.flip()

That was too helpful. Now i gained my motivation back. Thanks a lot sir! — nongenua, Mar 17 '21 at 15:47

why doesn't the rectangle move?

1 Answers1