90 lines
2.4 KiB
Python
90 lines
2.4 KiB
Python
from manim import *
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import manim
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class CoordinateSystem(Scene):
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def construct(self):
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# ===== 左侧坐标系 =====
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# 使用Axes替代NumberPlane以获得更多功能
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left_axes = Axes(
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x_range=[-4, 4, 1],
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y_range=[0, 20, 5],
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x_length=4,
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y_length=4,
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axis_config={"color": BLUE}
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).add_coordinates()
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left_axes.shift(LEFT * 3 + DOWN * 1.5)
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# 修正1：正确的函数表达式和参数
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left_graph = left_axes.plot(
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lambda x: x ** 2, # 修正指数函数
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x_range=[-4, 4],
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color=GREEN
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)
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# 修正2：使用正确的黎曼矩形方法
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riemann_area = left_axes.get_riemann_rectangles(
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left_graph,
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x_range=[-2, 2],
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dx=0.2, # 调整密度
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color=[BLUE, GREEN],
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input_sample_type="right"
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)
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# ===== 右侧坐标系 =====
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right_axes = Axes(
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x_range=[-4, 4, 1],
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y_range=[-20, 20, 5],
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x_length=4,
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y_length=4,
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axis_config={"color": RED}
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).add_coordinates()
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right_axes.shift(RIGHT * 3 + DOWN * 1.5)
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right_graph = right_axes.plot(
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lambda x: 2 * x,
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x_range=[-4, 4],
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color=YELLOW
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)
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# 修正3：正确的垂线方法
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v_lines = right_axes.get_vertical_lines_to_graph(
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right_graph,
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x_range=[-3, 3],
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num_lines=12,
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color=WHITE
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)
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# ===== 动画序列 =====
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# 修正4：分步动画展示
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self.play(
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LaggedStart(
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Create(left_axes),
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Create(right_axes),
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lag_ratio=0.5
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),
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run_time=2
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)
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self.play(
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Create(left_graph),
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Create(right_graph),
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run_time=3
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)
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self.play(
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FadeIn(riemann_area),
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Create(v_lines),
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run_time=2
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)
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self.wait()
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if __name__ == '__main__':
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config = {
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"quality": "low_quality",
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"preview": True,
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"media_dir": "./output"
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}
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with manim.tempconfig(config):
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scene = CoordinateSystem()
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scene.render() |