# -*- coding: utf-8 -*-.py
# -*- coding: utf-8 -*-
from manim import *
import numpy as np

class Skeleton(Scene):
    # 定义坐标轴范围常量
    X_MIN = -3.5 * PI
    X_MAX = 3.5 * PI
    Y_MIN = -1.5
    Y_MAX = 1.5
    
    def construct(self):
        # 创建主标题文本
        main_title = Text(
            "东师理想数学动画AI制作平台作品",
            font_size=60,
            color=WHITE
        )
        
        # 创建副标题文本
        sub_title = Text(
            "正弦与余弦的关系",
            font_size=36,
            color=BLUE
        ).next_to(main_title, DOWN, buff=0.5)
        
        # 标题组
        title_group = VGroup(main_title, sub_title)
        
        # 淡入动画(2秒)
        self.play(FadeIn(title_group), run_time=2)
        
        # 停留(3秒)
        self.wait(3)
        
        # 淡出动画(2秒)
        self.play(FadeOut(title_group), run_time=2)
        
        # 清屏(1秒)
        self.wait(1)
        
        # 创建坐标系
        axes = Axes(
            x_range=[self.X_MIN, self.X_MAX, PI/2],
            y_range=[self.Y_MIN, self.Y_MAX, 0.5],
            axis_config={
                "color": WHITE,
                "include_tip": True,  # 包含箭头
                "include_numbers": False
            },
            x_length=13,
            y_length=6
        )
        
        # 坐标系居中显示
        axes.center()
        
        # 坐标轴淡入动画(1秒)
        self.play(Create(axes), run_time=1)
        
        # 创建正弦函数图像,绿色
        sin_graph = axes.plot(lambda x: np.sin(x), color=GREEN)
        
        # 曲线从左到右扫出动画(3秒)
        self.play(Create(sin_graph), run_time=3)
        
        # 在(-3π,1)位置添加sin(x)标签
        sin_label = MathTex(r"\sin(x)", color=GREEN).scale(0.8)
        sin_label.next_to(axes.c2p(-3*PI, 1), UP, buff=0.1)
        self.play(Write(sin_label), run_time=1)
        
        # 停留展示(2秒)
        self.wait(2)
        
        # 淡出所有元素(3秒)
        graph_group = VGroup(axes, sin_graph, sin_label)
        self.play(FadeOut(graph_group), run_time=3)
        
        # 结束等待(1秒)
        self.wait(1)

if __name__ == "__main__":
    # 导入必要的模块
    import sys
    import os
    from manim import *
    from manim.utils.rate_functions import ease_in_out_sine

    # 设置 UTF-8 编码
    os.environ['PYTHONIOENCODING'] = 'utf-8'
    sys.stdout.reconfigure(encoding='utf-8')
    sys.stderr.reconfigure(encoding='utf-8')

    # 全局指定 ctex 模板(一次性)
    config.tex_template = TexTemplateLibrary.ctex
    # 设置输出格式为MP4
    config.output_format = "mp4"
    # 设置输出目录
    config.media_dir = "./output/"
    # 使用临时配置渲染场景(配置只在with块内有效)
    with tempconfig({
        "quality": "high_quality",
        "background_color": BLACK,
        "preview": True,
        "pixel_height": 1080,
        "pixel_width": 1920,
        "frame_rate": 30
    }):
        # 实例化场景类
        scene = Skeleton()
        # 执行渲染流程(包含文件生成和预览)                
        scene.render()