/manim-express

Easy-to-use math animation rendering engine

Primary LanguagePythonMIT LicenseMIT

manim_express

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English | 中文说明

Install

pip install manim_express

Run in pycharm

https://stackoverflow.com/questions/44851652/how-to-allocate-a-pseudo-tty-in-which-to-run-scripts-from-ide

(Find action 'Registry' in PyCharm) named 'run.processes.with.pty' that allows to run Python processes with tty

Quick start

  • Render an animation: 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.show_creation(square)
scene.play(ReplacementTransform(square, circle))

scene.hold_on()

    Operating graphics:

    • hold down the d key or mouse left on the keyboard and move the mouse to change the three-dimensional perspective.
    • hold down the s key or mouse right on the keyboard and move the mouse to pan the screen
    • hold down the z or ctrl on the keyboard while scrolling the middle mouse button to zoom the screen
    • scroll the middle mouse button to move the screen up and down
    • reset camera view by pressing r
    • close the window and exit the program by pressing q or tab
    • pause the animation by pressing space or ctrl or alt
    • previews animation clip by pressing LEFT
    • next animation clip: RIGHT
    • replay current animation clip: DOWN

  • manim_express vs Matplotlib:
    Eager mode usage:

    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.show_plot()
scene.hold_on()

    Object oriented usage:

    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()

Resources

Examples

  • Bezier curve

    Bezier.mp4

  • GOA model

    ParticleMultiRay.mp4

  • GOA

  • Apply function

  • Double pendulum