papers-context/agent_workspace/manim_docs/reference/manim.mobject.value_tracker.ValueTracker.md

ValueTracker

Qualified name: manim.mobject.value\_tracker.ValueTracker

class ValueTracker(value=0, **kwargs)

Bases: Mobject

A mobject that can be used for tracking (real-valued) parameters. Useful for animating parameter changes.

Not meant to be displayed. Instead the position encodes some number, often one which another animation or continual_animation uses for its update function, and by treating it as a mobject it can still be animated and manipulated just like anything else.

This value changes continuously when animated using the animate syntax.

Examples

NOTE

You can also link ValueTrackers to updaters. In this case, you have to make sure that the ValueTracker is added to the scene by add

Methods

get_value	Get the current value of this ValueTracker.
increment_value	Increments (adds) a scalar value to the ValueTracker.
interpolate	Turns self into an interpolation between mobject1 and mobject2.
set_value	Sets a new scalar value to the ValueTracker.

Attributes

animate	Used to animate the application of any method of self.
animation_overrides
depth	The depth of the mobject.
height	The height of the mobject.
width	The width of the mobject.

• Parameters:
  • value (float)
  • kwargs (Any)

_original__init__(value=0, **kwargs)

Initialize self. See help(type(self)) for accurate signature.

• Parameters:
  • value (float)
  • kwargs (Any)
• Return type: None

get_value()

Get the current value of this ValueTracker.

• Return type: float

increment_value(d_value)

Increments (adds) a scalar value to the ValueTracker.

• Parameters: d_value (float)
• Return type: Self

interpolate(mobject1, mobject2, alpha, path_func=)

Turns self into an interpolation between mobject1 and mobject2.

• Parameters:
  • mobject1 (Mobject)
  • mobject2 (Mobject)
  • alpha (float)
  • path_func (PathFuncType)
• Return type: Self

set_value(value)

Sets a new scalar value to the ValueTracker.

• Parameters: value (float)
• Return type: Self