### 使用纯颜色和简单图形构建的Pygame小游戏 为了创建一个不依赖于任何外部文件或图片的小游戏，可以利用`pygame.draw`模块中的函数来绘制各种形状。下面是一个简单的例子，在此游戏中，玩家通过上下箭头控制一个小方块躲避从屏幕顶部随机下降的大方块。 #### 初始化部分 ```python import pygame from random import randint # 初始化Pygame pygame.init() # 设置窗口尺寸 screen_width = 800 screen_height = 600 win = pygame.display.set_mode((screen_width, screen_height)) pygame.display.set_caption("Dodge Blocks Game") # 颜色定义 black = (0, 0, 0) white = (255, 255, 255) clock = pygame.time.Clock() player_size = 50 enemy_size = 70 player_pos = [screen_width / 2, screen_height - 2 * player_size] enemy_list = [] speed = 10 score = 0 myFont = pygame.font.SysFont("monospace", 35) def set_level(score, _speed): if score < 20: _speed = 10 elif score < 40: _speed = 15 elif score < 60: _speed = 20 else: _speed = 25 return _speed def drop_enemies(enemy_list): delay = random.random() if len(enemy_list) < 10 and delay < 0.1: x_pos = randint(0, screen_width-enemy_size) y_pos = 0 enemy_list.append([x_pos, y_pos]) def draw_enemies(enemy_list): for enemy_pos in enemy_list: pygame.draw.rect(win, black, (enemy_pos[0], enemy_pos[1], enemy_size, enemy_size)) def update_enemy_positions(enemy_list, score): for idx, enemy_pos in enumerate(enemy_list): if enemy_pos[1] >= 0 and enemy_pos[1] < screen_height: enemy_pos[1] += speed else: enemy_list.pop(idx) score += 1 return score def collision_check(enemy_list, player_pos): for enemy_pos in enemy_list: if detect_collision(enemy_pos, player_pos): return True return False def detect_collision(player_pos, enemy_pos): p_x = player_pos[0] p_y = player_pos[1] e_x = enemy_pos[0] e_y = enemy_pos[1] if (e_x >= p_x and e_x < (p_x + player_size)) or \ (p_x >= e_x and p_x < (e_x+enemy_size)): if (e_y >= p_y and e_y < (p_y + player_size)) or \ (p_y >= e_y and p_y < (e_y+enemy_size)): return True return False running = True while running: win.fill(white) for event in pygame.event.get(): if event.type == pygame.QUIT: running = False keys = pygame.key.get_pressed() if keys[pygame.K_LEFT]: player_pos[0] -= 5 if keys[pygame.K_RIGHT]: player_pos[0] += 5 if keys[pygame.K_UP]: player_pos[1] -= 5 if keys[pygame.K_DOWN]: player_pos[1] += 5 drop_enemies(enemy_list) score = update_enemy_positions(enemy_list, score) speed = set_level(score, speed) text = "Score:" + str(score) label = myFont.render(text, 1, black) win.blit(label, (screen_width-200, screen_height-40)) if collision_check(enemy_list, player_pos): running = False break draw_enemies(enemy_list) pygame.draw.rect(win, white, (player_pos[0], player_pos[1], player_size, player_size)) clock.tick(30) pygame.display.update() pygame.quit() ``` 这个游戏完全基于内部逻辑运行，不需要加载额外资源文件即可工作正常[^1]。