下雪旋转的圣诞树py代码

### 实现带有下雪效果并旋转的圣诞树动画

为了创建一个具有下雪效果和旋转功能的圣诞树动画，可以利用 `pygame` 库来处理图形渲染以及动画逻辑。下面是一个完整的 Python 脚本示例[^1]：

import pygame
import random
import math

# 初始化 Pygame 和设置屏幕尺寸
pygame.init()
screen_width = 800
screen_height = 600
screen = pygame.display.set_mode((screen_width, screen_height))
clock = pygame.time.Clock()

class Snowflake:
    def __init__(self):
        self.x = random.randint(0, screen_width)
        self.y = random.randint(-50, -10)
        self.speed = random.uniform(0.5, 2)

    def fall(self):
        self.y += self.speed
        if self.y > screen_height:
            self.y = random.randint(-50, -10)
            self.x = random.randint(0, screen_width)

def draw_tree(angle, position=(400, 300), size=100):
    color = (34, 139, 34)  # Green color for the tree
    
    points = []
    for i in range(3):  # Draw three levels of branches
        radius = int(size * ((i + 1) / 3)) // 2
        
        branch_angle = angle + (math.pi / 4) * i
        point_x = position[0] + int(radius * math.cos(branch_angle))
        point_y = position[1] + int(radius * math.sin(branch_angle))

        points.append([point_x, point_y])
    
    base_point = [position[0], position[1] + size]

    pygame.draw.polygon(screen, color, [*points, base_point])

angle = 0
snowflakes = [Snowflake() for _ in range(200)]

running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
            
    screen.fill((0, 0, 0))  # Clear screen with black background
    
    # Update and render snowflakes
    for flake in snowflakes:
        flake.fall()
        pygame.draw.circle(screen, (255, 255, 255), (int(flake.x), int(flake.y)), 2)
        
    # Rotate Christmas Tree
    angle -= 0.02
    draw_tree(angle)

    pygame.display.flip()
    clock.tick(60)

pygame.quit()

这段代码定义了一个简单的雪花类用于模拟降雪，并通过调整角度参数实现了圣诞树的旋转效果[^1]。