49 lines
1.3 KiB
Python
49 lines
1.3 KiB
Python
from manim import *
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import numpy as np
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class CartesianPlaneScene(Scene):
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def construct(self):
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# 一、创建坐标平面，先隐藏网格和数字
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plane = NumberPlane(
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x_range=[-5, 5, 1],
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y_range=[-3, 3, 1],
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background_line_style={
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"stroke_color": GREY,
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"stroke_width": 1,
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"stroke_opacity": 1,
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},
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axis_config={
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"include_tip": True,
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"tip_length": 0.15,
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}
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)
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# 生成坐标数字，但先透明
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plane.add_coordinates()
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plane.background_lines.set_opacity(0)
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plane.coordinate_labels.set_opacity(0)
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# 二、动画绘制 X 轴和 Y 轴
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self.play(
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Create(plane.x_axis, run_time=2),
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Create(plane.y_axis, run_time=2),
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)
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self.wait(1)
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# 三、写出刻度数字
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self.play(
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FadeIn(plane.coordinate_labels, shift=DOWN*0.2),
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run_time=2
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)
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self.wait(1)
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# 四、绘制网格线
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self.play(
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Create(plane.background_lines, run_time=3),
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)
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self.wait(1)
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# 五、突出原点
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origin_dot = Dot(plane.c2p(0, 0), color=RED)
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self.play(FadeIn(origin_dot), run_time=1)
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self.wait(2)
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