520特别篇：CodeBuddy最懂你的爱：520帮你画爱心动画程序送女友

import pygame
import math
import sys
from pygame.locals import *

pygame.init()
WIDTH, HEIGHT = 800, 600
screen = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("爱心血液填充动画")

# 颜色定义
RED = (255, 0, 0)
PINK = (255, 192, 203)
BLACK = (0, 0, 0)
BUTTON_GREEN = (100, 200, 100)
WHITE = (255, 255, 255)

# 爱心参数
heart_center = (WIDTH//2, HEIGHT//2 + 10)
heart_size = 10  # 适当增大尺寸
fill_level = 0
filling = False
wave_offset = 0

# 按钮设置
button_rect = pygame.Rect(WIDTH//2 - 50, HEIGHT - 80, 100, 40)
button_font = pygame.font.SysFont('Arial', 24)
button_text = button_font.render("start", True, WHITE)

def get_heart_points():
    points = []
    for angle in range(0, 360, 2):
        rad = math.radians(angle)
        x = heart_center[0] + heart_size * (16 * math.sin(rad)**3)
        y = heart_center[1] - heart_size * (13 * math.cos(rad) 
                                          - 5 * math.cos(2*rad) 
                                          - 2 * math.cos(3*rad) 
                                          - math.cos(4*rad))
        points.append((x, y))
    return points

def draw_blood_fill(surface, points, fill_ratio):
    if fill_ratio <= 0:
        return
    
    # 创建临时表面
    blood_surface = pygame.Surface((WIDTH, HEIGHT), pygame.SRCALPHA)
    
    # 计算填充高度
    min_y = min(p[1] for p in points)
    max_y = max(p[1] for p in points)
    fill_height = min_y + (max_y - min_y) * (1 - fill_ratio)
    
    # 绘制填充区域
    fill_points = []
    for p in points:
        if p[1] >= fill_height:
            fill_points.append(p)
        else:
            fill_points.append((p[0], fill_height))
    
    # 添加波浪效果
    for i in range(len(fill_points)):
        if abs(fill_points[i][1] - fill_height) < 5:
            fill_points[i] = (fill_points[i][0], 
                             fill_points[i][1] + 3 * math.sin(fill_points[i][0]/30 + wave_offset))
    
    if len(fill_points) > 2:
        pygame.draw.polygon(blood_surface, (*RED, 200), fill_points)
    
    # 应用遮罩
    mask = pygame.Surface((WIDTH, HEIGHT), pygame.SRCALPHA)
    pygame.draw.polygon(mask, (255,255,255,255), points)
    blood_surface.blit(mask, (0,0), special_flags=pygame.BLEND_RGBA_MULT)
    
    surface.blit(blood_surface, (0,0))

def main():
    global fill_level, filling, wave_offset
    
    clock = pygame.time.Clock()
    running = True
    
    while running:
        screen.fill(BLACK)
        
        for event in pygame.event.get():
            if event.type == QUIT:
                running = False
            elif event.type == MOUSEBUTTONDOWN:
                if button_rect.collidepoint(event.pos):
                    fill_level = 0
                    filling = True
        
        if filling and fill_level < 1:
            fill_level += 0.005
            wave_offset += 0.1
        else:
            filling = False
        
        heart_points = get_heart_points()
        
        # 先绘制血液填充
        if fill_level > 0:
            draw_blood_fill(screen, heart_points, fill_level)
        
        # 再绘制爱心轮廓
        if heart_points:
            pygame.draw.polygon(screen, PINK, heart_points, 3)
        
        # 绘制按钮
        pygame.draw.rect(screen, BUTTON_GREEN, button_rect, border_radius=5)
        screen.blit(button_text, (button_rect.centerx - button_text.get_width()//2, 
                                 button_rect.centery - button_text.get_height()//2))
        
        pygame.display.flip()
        clock.tick(60)
    
    pygame.quit()
    sys.exit()

if __name__ == "__main__":
    main()