Extending manim-eng

manim-eng was designed to be extensible, and these pages serve as a guide to its ‘secret’ public API of implementation classes. I say secret as these classes are not imported by default; their imports are contained in an implementation submodule. To get access, add the following to your file.

from manim_eng.implementation import *

Contents

• How manim-eng works
  • The Mark class
    • Anchors
  • The Markable class
• Building custom components
  • Step 1: import the implementation API
  • Step 2: choose the right base class
  • Step 3: override the _construct() method
    • Step 3(a): call the superclass’ _construct() method
    • Step 3(b): build the mobjects representing the symbol
    • Step 3(c): match the style of the mobjects
    • Step 3(d): add the mobjects to the component body
  • Using modifiers to avoid duplication
    • The symbol modifiers
    • The outline modifiers
• The debug mode
  • Activating the debug mode
• Defining new units and prefixes
  • Defining units
  • Defining prefixes