python龙卷风粒子特效代码

以下是一个简单的 Python 龙卷风粒子特效代码示例：

import pygame
import random

# 初始化 Pygame
pygame.init()

# 定义颜色
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)
GRAY = (128, 128, 128)
GREEN = (0, 255, 0)

# 设定屏幕大小
SCREEN_WIDTH = 600
SCREEN_HEIGHT = 400
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption("Tornado Particle Effect")

# 创建一个粒子类
class Particle(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = pygame.Surface([5, 5])
        self.image.fill(WHITE)
        self.rect = self.image.get_rect()
        self.rect.x = SCREEN_WIDTH / 2
        self.rect.y = SCREEN_HEIGHT / 2
        self.angle = random.randint(0, 360)
        self.distance = random.randint(50, 200)
        self.speed = random.randint(1, 3)
        self.size = random.randint(1, 5)

    def update(self):
        # 计算新的位置
        radians = self.angle * math.pi / 180
        self.rect.x = SCREEN_WIDTH / 2 + math.cos(radians) * self.distance
        self.rect.y = SCREEN_HEIGHT / 2 + math.sin(radians) * self.distance

        # 更新角度和距离
        self.angle += random.randint(-10, 10)
        self.distance -= random.randint(1, 2)

        # 调整速度和大小
        self.speed -= 0.05
        if self.speed < 0:
            self.speed = 0
        self.size -= 0.05
        if self.size < 0:
            self.size = 0

        # 调整颜色
        self.image.set_alpha(int(self.speed * 255))
        self.image = pygame.transform.scale(self.image, [int(self.size), int(self.size)])

# 创建一个粒子组
particle_group = pygame.sprite.Group()

# 主循环
done = False
clock = pygame.time.Clock()

while not done:
    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            done = True

    # 创建新的粒子并添加到组中
    new_particle = Particle()
    particle_group.add(new_particle)

    # 更新所有粒子的位置、速度和大小
    particle_group.update()

    # 绘制所有粒子
    screen.fill(BLACK)
    particle_group.draw(screen)

    # 更新屏幕
    pygame.display.flip()

    # 控制帧率
    clock.tick(60)

# 退出 Pygame
pygame.quit()