在 PyGame 中,当以下情况时如何防止球进入墙内它击中了一个?
嵌套循环:
问题是由于使用多个嵌套循环而引起的。在应用程序循环中处理移动会更有效。
<code class="python">while run: # Handle movement continuously box.y -= box.vel_y box.x += box.vel_x</code>
边界定义:
使用 pygame.Rect 对象定义球运动的矩形区域:
<code class="python">bounds = window.get_rect() # full screen bounds = pygame.Rect(450, 200, 300, 200) # rectangular region</code>
边界碰撞处理:
当球与边界相交时更新球方向:
<code class="python">if box.x - box.radius < bounds.left or box.x + box.radius > bounds.right: box.vel_x *= -1 if box.y - box.radius < bounds.top or box.y + box.radius > bounds.bottom: box.vel_y *= -1</code>
<code class="python">box = Circle(600,300,10) run = True start = False clock = pygame.time.Clock() while run: clock.tick(120) for event in pygame.event.get(): if event.type == pygame.QUIT: run = False keys = pygame.key.get_pressed() if keys[pygame.K_SPACE]: start = True bounds = pygame.Rect(450, 200, 300, 200) if start: box.y -= box.vel_y box.x += box.vel_x if box.x - box.radius < bounds.left or box.x + box.radius > bounds.right: box.vel_x *= -1 if box.y - box.radius < bounds.top or box.y + box.radius > bounds.bottom: box.vel_y *= -1 window.fill((0,0,0)) pygame.draw.rect(window, (255, 0, 0), bounds, 1) pygame.draw.circle(window, (44,176,55), (box.x, box.y), box.radius) pygame.display.update()</code>
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