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When working with PyGame, it's common to encounter the issue where nothing is drawn on the display. This can be frustrating and difficult to resolve, but the solution lies in understanding the concept of display updates.
PyGame operates on two surfaces: the Surface object and the display. Changes made to the Surface object are not immediately reflected on the display. To make them visible, the display needs to be updated explicitly.
PyGame provides two methods for updating the display:
To solve the issue of nothing being drawn, the display must be updated after making any drawing operations on the Surface object. Here's an example:
import pygame, sys from pygame.locals import * pygame.init() DISPLAY = pygame.display.set_mode((800,800)) pygame.display.set_caption("thing") while True: for event in pygame.event.get(): if event.type == QUIT: pygame.quit() sys.exit() DISPLAY.fill(0) # Clear the display pygame.draw.rect(DISPLAY, (200,200,200), pygame.Rect(0,400,800,400)) # Draw a gray rectangle pygame.display.flip() # Update the display
Now, the gray rectangle should be visible on the display every time the program is run.
To ensure a smooth and consistent PyGame experience, consider these tips:
By implementing these practices, you can ensure that your PyGame application displays correctly and effortlessly.
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