如何阻止对象在pygame中重叠？

问题描述

运行代码并按向左箭头时，太空飞船将重叠/相乘。我希望该对象停止复制。这是代码：

import pygame
import sys

pygame.init()
screen = pygame.display.set_mode((288,512))
clock = pygame.time.Clock()
spaceship = pygame.image.load(r'C:\Users\Anonymous\Downloads\New folder\spaceship.png')
x = 150
y = 495
spaceship_rect = spaceship.get_rect(center=(x,y))
veLocity = 10

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
    
    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT] and x > 0:
        x -= veLocity
        spaceship_rect = spaceship.get_rect(center=(x,y))

    screen.blit(spaceship,spaceship_rect)
    pygame.display.update()
    clock.tick(120)

解决方法

在表面上绘制的任何对象都永久停留在该位置。绘制对象只会持续改变表面上某些像素的颜色。
在绘制场景并更新显示之前，您必须通过pygame.Surface.fill清除所有帧中的显示：

screen.fill(0)
screen.blit(spaceship,spaceship_rect)
pygame.display.update()

完整示例：

import pygame
import sys

pygame.init()
screen = pygame.display.set_mode((288,512))
clock = pygame.time.Clock()
spaceship = pygame.image.load(r'C:\Users\Anonymous\Downloads\New folder\spaceship.png')
x = 150
y = 495
spaceship_rect = spaceship.get_rect(center=(x,y))
velocity = 10

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
    
    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT] and x > 0:
        x -= velocity
        spaceship_rect = spaceship.get_rect(center=(x,y))

    screen.fill(0)
    screen.blit(spaceship,spaceship_rect)
    pygame.display.update()
    clock.tick(120)

pygame python