Pygame基础4-多阶段

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发布于 2024-04-11 12:59:26

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发布于 2024-04-11 12:59:26

文章被收录于专栏：Python基础、进阶与实战Python基础、进阶与实战

4-多阶段

原理

本章是对第2章的延续。我们希望为游戏添加多个阶段，比如开始界面、游戏界面、结束界面等。

intro阶段

mian阶段

为此，我们可以使用一个类来管理游戏的不同阶段。我们创建了GameManager类，并通过self.status属性表示不同的阶段。

• intro阶段：显示准备的背景。当用户按下鼠标时，将状态切换为main_game
• main_game阶段：进行游戏，更新游戏画面。

class GameManager:
    def __init__(self):
        self.status = "intro"
    def intro(self):
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                exit()
            if event.type == pygame.MOUSEBUTTONDOWN:
                self.status = "main_game"
        screen.blit(bg_img, (0, 0))
        screen.blit(ready_img, (screen_width//2, screen_height//2))
        pygame.display.flip()
        
    def main_game(self):
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                exit()
            if event.type == pygame.MOUSEBUTTONDOWN:
                crosshair.shoot()

        screen.blit(bg_img, (0, 0))
        target_group.update()
        target_group.draw(screen)
        crosshair_group.update()
        crosshair_group.draw(screen)
        pygame.display.flip()
        
    def start_game(self):
        if self.status == "intro":
            self.intro()
        elif self.status == "main_game":
            self.main_game()

game_manager = GameManager()
while True:
    game_manager.start_game()
    clock.tick(60)

使用GameManager类管理游戏后，我们发现游戏的主循环变得很简单。

案例

完整代码。添加了准备阶段。

# 使用pygame SPrite实现射击游戏
import pygame
import random

class Crosshair(pygame.sprite.Sprite):
    def __init__(self, img_path):
        super().__init__()
        self.image = pygame.image.load(img_path)
        self.rect = self.image.get_rect()
        self.gun_shot = pygame.mixer.Sound('gunshot.wav')
    def shoot(self):
        self.gun_shot.play()
        pygame.sprite.spritecollide(crosshair, target_group, True)
    def update(self):
        self.rect.center = pygame.mouse.get_pos()

class Target(pygame.sprite.Sprite):
    def __init__(self, img_path, x, y):
        super().__init__()
        self.image = pygame.image.load(img_path)
        self.rect = self.image.get_rect()
        self.rect.center = (x, y)
        
    def update(self):
        pass

# init 
pygame.init()
screen_width = 800
screen_height = 600
screen = pygame.display.set_mode((screen_width, screen_height))
pygame.mouse.set_visible(False)
clock = pygame.time.Clock()
crosshair = Crosshair(r'PNG\HUD\crosshair_blue_small.png')

crosshair_group = pygame.sprite.Group()
crosshair_group.add(crosshair)

target_group = pygame.sprite.Group()
for i in range(20):
    x,y = random.randint(0, screen_width), random.randint(0, screen_height)
    target = Target(r'PNG\Objects\duck_target_yellow.png', x, y)
    target_group.add(target)

bg_img = pygame.image.load(r'PNG\Stall\bg_wood.png')
bg_img = pygame.transform.scale(bg_img, (screen_width, screen_height))

ready_img = pygame.image.load(r'PNG\HUD\text_ready.png')

class GameManager:
    def __init__(self):
        self.status = "intro"
    def intro(self):
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                exit()
            if event.type == pygame.MOUSEBUTTONDOWN:
                self.status = "main_game"
        screen.blit(bg_img, (0, 0))
        screen.blit(ready_img, (screen_width//2, screen_height//2))
        pygame.display.flip()
        
    def main_game(self):
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                exit()
            if event.type == pygame.MOUSEBUTTONDOWN:
                crosshair.shoot()

        screen.blit(bg_img, (0, 0))
        target_group.update()
        target_group.draw(screen)
        crosshair_group.update()
        crosshair_group.draw(screen)
        pygame.display.flip()
        
    def start_game(self):
        if self.status == "intro":
            self.intro()
        elif self.status == "main_game":
            self.main_game()

game_manager = GameManager()
while True:
    game_manager.start_game()
    clock.tick(60)

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原始发表：2024-03-27，如有侵权请联系 cloudcommunity@tencent.com 删除

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