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manim_express

image image image image

English | 中文说明

Install

pip install manim_express

以上步骤将安装 manim_express 和 manimlib. 然后就可以在任何代码位置导入使用这个动画库了.

快速开始

  • 渲染一个动画: 3b1b:SquareToCircle

    from manimlib import *
from manim_express import GlEagerScene

scene = GlEagerScene()
circle = Circle()
circle.set_fill(BLUE, opacity=0.5)
circle.set_stroke(BLUE_E, width=4)

square = Square()
scene.play(ShowCreation(square))
scene.play(ReplacementTransform(square, circle))

scene.hold_on()

    与渲染画面交互:

    • 按住 d 键 或 鼠标左键 然后移动鼠标可以改变三维空间中相机的旋转视角.
    • 按住 s 键 或 鼠标右键 然后移动鼠标可以平移相机.
    • 按住 z 键 或 ctrl键 同时滚动鼠标滚轮以缩放画面.
    • 通过 r 重制相机视角.
    • 离开/退出当前动画: q or tab
    • 暂停动画: space or ctrl or alt
    • 前一段动画: LEFT
    • 后一段动画: RIGHT
    • 重新播放当前动画: DOWN

  • manim_express vs Matplotlib:
    使用Eager mode:

    from manimlib import *
from manim_express import GlEagerScene
CONFIG.use_online_tex = True # If you don't have installed latex locally.
theta = np.linspace(0, 2*np.pi, 200)
x = np.cos(theta)
y = np.sin(theta)

scene = GlEagerScene()
scene.plot(x, y, color=GREEN, width=2, scale_ratio=1)
scene.hold_on()

    使用面向对象的方式:

    from manimlib import *
from manim_express import GlEagerScene
import numpy as np
class ScatterExample(GlEagerScene):
    def clip_1(self):
      n_features = 2
      X = np.random.normal(0, 20, (2000, n_features))
      theta = np.linspace(0, np.pi*2, 150)
      r = 50
      x, y = r*np.cos(theta), r*np.sin(theta)
      self.scatter2d(X[:, 0], X[:, 1], size=.03, color=YELLOW, ratio=0.618)
      self.scatter2d(x, y, size=.03, color=BLUE)

ScatterExample().render()

资源

Examples

  • Bezier curve

    Bezier.mp4

  • GOA model

    ParticleMultiRay.mp4

  • GOA

  • Apply function

  • Double pendulum