在PyGame 中,當以下情況時如何防止球進入牆內它擊中了一個?
巢狀循環:
問題是由於使用多個巢狀循環而引起的。在應用程式循環中處理移動會更有效。
<code class="python">while run: # Handle movement continuously box.y -= box.vel_y box.x += box.vel_x</code>
邊界定義:
使用pygame.Rect 物件定義球運動的長方形區域:
<code class="python">bounds = window.get_rect() # full screen bounds = pygame.Rect(450, 200, 300, 200) # rectangular region</code>
處理:
球與邊界相交時更新球方向:<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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