153 lines
5.6 KiB
Python
153 lines
5.6 KiB
Python
import pygame
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import sys
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def check_events(settings):
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for event in pygame.event.get():
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# 当按关闭或者按ESC键退出游戏
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if event.type == pygame.QUIT:
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pygame.quit()
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sys.exit()
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elif event.type == pygame.KEYDOWN:
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if event.key == pygame.K_ESCAPE:
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pygame.quit()
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sys.exit()
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# 按1键选择手动模式
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elif event.key == pygame.K_1:
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settings.game_mode = 1
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# 按2键选择自动模式
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elif event.key == pygame.K_2:
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settings.game_mode = 2
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def show_start(settings, screen):
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"""模式选择界面"""
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title_Font = pygame.font.Font(settings.font_name, 80) # 设置标题字体
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title_image = title_Font.render("贪吃蛇", True, (255, 255, 255), (0, 0, 0))
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title_rect = title_image.get_rect()
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title_rect.center = screen.get_rect().center
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presskey_font = pygame.font.Font(settings.font_name, 15) # 设置说明文字的字体
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presskey_image = presskey_font.render(
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'按1为手动模式,按2为自动模式,按ESC可退出游戏', True, (255, 255, 255), (0, 0, 0))
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presskey_rect = presskey_image.get_rect()
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presskey_rect.centerx = title_rect.centerx
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presskey_rect.top = title_rect.bottom
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while True:
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screen.fill(settings.bg_color) # 绘制屏幕
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screen.blit(title_image, title_rect) # 绘制标题
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screen.blit(presskey_image, presskey_rect) # 绘制说明文字
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check_events(settings) # 检测键盘
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if settings.game_mode != 0: # 说明按了1或2，退出循环
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break
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pygame.display.flip()
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def show_end(settings, screen):
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"""失败结算界面"""
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title_font = pygame.font.Font(settings.font_name, 80)
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game_image = title_font.render('Game', True, (233, 150, 122))
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over_image = title_font.render('Over', True, (233, 150, 122))
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game_rect = game_image.get_rect()
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over_rect = over_image.get_rect()
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screen_rect = screen.get_rect()
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game_rect.midtop = (settings.width / 2, screen_rect.top + 70)
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over_rect.midtop = (settings.width / 2, game_rect.bottom + 50)
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screen.blit(game_image, game_rect)
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screen.blit(over_image, over_rect)
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pygame.display.flip()
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pygame.time.wait(1500)
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settings.game_mode = 0
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def draw_grid(settings, screen):
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# 绘制横向线
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for x in range(0, settings.width, settings.cell_size):
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pygame.draw.line(screen, (40, 40, 40), (x, 0), (x, settings.height))
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# 绘制竖向线
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for y in range(0, settings.height, settings.cell_size):
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pygame.draw.line(screen, (40, 40, 40), (0, y), (settings.width, y))
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def update_screen(settings, screen):
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screen.fill(settings.bg_color)
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draw_grid(settings, screen)
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# 绘制蛇
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def draw_snake(ai_settings, screen, snake):
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# 头部用白色
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x = snake.coords[0]['x'] * ai_settings.cell_size
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y = snake.coords[0]['y'] * ai_settings.cell_size
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snake_head_rect = pygame.Rect(
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x, y, ai_settings.cell_size, ai_settings.cell_size)
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pygame.draw.rect(screen, (255, 255, 255), snake_head_rect)
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# 蛇身内部用浅绿，外框用深绿
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for coord in snake.coords[1: -1]:
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x = coord['x'] * ai_settings.cell_size
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y = coord['y'] * ai_settings.cell_size
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snake_part_rect = pygame.Rect(
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x, y, ai_settings.cell_size, ai_settings.cell_size)
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pygame.draw.rect(screen, (0, 155, 0), snake_part_rect)
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snake_part_inner_rect = pygame.Rect(
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x + 4, y + 4, ai_settings.cell_size - 8, ai_settings.cell_size - 8)
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pygame.draw.rect(screen, (0, 255, 0), snake_part_inner_rect)
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# 蛇尾用浅绿
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coord = snake.coords[-1]
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x = coord['x'] * ai_settings.cell_size
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y = coord['y'] * ai_settings.cell_size
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snake_tail_rect = pygame.Rect(
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x, y, ai_settings.cell_size, ai_settings.cell_size)
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pygame.draw.rect(screen, (0, 255, 0), snake_tail_rect)
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# 绘制游戏界面
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def update_screen(settings, screen, snake):
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screen.fill(settings.bg_color)
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draw_grid(settings, screen)
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# 移动蛇
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del snake.coords[-1] # 加蛇头
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snake.update() # 去蛇尾
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if not is_game_over(settings, snake):
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settings.game_mode = -1
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else:
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draw_snake(settings, screen, snake)
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pygame.display.flip()
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# 暂停一下
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settings.my_clock.tick(settings.clock_frq)
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def is_game_over(settings, snake):
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# 碰到左右墙壁
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if (snake.coords[snake.head_index]['x'] == -1 or snake.coords[snake.head_index]['x'] == settings.cell_w):
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return False
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# 碰到上下墙壁
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if (snake.coords[snake.head_index]['y'] == -1 or snake.coords[snake.head_index]['y'] == settings.cell_h):
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return False
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# 碰到自己
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if (snake.coords[snake.head_index] in snake.coords[1:]):
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return False
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return True
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# 检测游戏过程中的按键
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def check_play_events(snake):
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for event in pygame.event.get():
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if event.type == pygame.QUIT:
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pygame.quit()
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sys.exit()
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elif event.type == pygame.KEYDOWN:
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if event.key == pygame.K_ESCAPE:
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pygame.quit()
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sys.exit()
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elif event.key == pygame.K_LEFT and not snake.direction == 'right':
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snake.direction = 'left'
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elif event.key == pygame.K_RIGHT and not snake.direction == 'left':
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snake.direction = 'right'
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elif event.key == pygame.K_UP and not snake.direction == 'down':
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snake.direction = 'up'
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elif event.key == pygame.K_DOWN and not snake.direction == 'up':
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snake.direction = 'down'
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