QingLong/AI/Manim/L6_Graphing.py

from manim import *
import manim


class Graphing(Scene):
    def construct(self):
        # 使用Axes替代NumberPlane以获得图形功能
        axes = Axes(
            x_range=[-6, 6],
            y_range=[-10, 10],
            axis_config={"color": BLUE},
            x_length=12,
            y_length=6
        ).add_coordinates()

        axes.shift(RIGHT * 3)

        # 修正1：使用plot方法替代get_graph
        my_function = axes.plot(
            lambda x: 0.1 * (x - 5) * x * (x + 5),
            x_range=[-6, 6],
            color=GREEN_B
        )

        # 修正2：使用正确的面积计算方法
        area = axes.get_area(
            my_function,
            x_range=[-5, 5],
            color=[BLUE, YELLOW],
            opacity=0.4
        )

        label = MathTex("f(x)=0.1x(x-5)(x+5)").next_to(axes, UP, buff=0.2)

        # 修正3：使用axes代替my_plane，通过函数直接计算y值
        x_val = -2
        y_val = 0.1 * (x_val - 5) * x_val * (x_val + 5)
        horiz_line = Line(
            start=axes.c2p(0, y_val),
            end=axes.c2p(x_val, y_val),
            stroke_color=YELLOW,
            stroke_width=10
        )

        # 更新动画顺序
        self.play(Create(axes), run_time=2)
        self.play(Create(my_function), Write(label))
        self.play(FadeIn(area))
        self.play(Create(horiz_line))
        self.wait()


if __name__ == '__main__':
    config = {
        "quality": "low_quality",
        "preview": True,
        "media_dir": "./custom_output"
    }

    with manim.tempconfig(config):
        scene = Graphing()
        scene.render()