Write

Draw text outlines and then fill the glyphs.

View source Guide and examplesInherits Animation

from proteinmotion import Write

Constructor

Write(target, *, lag_ratio=None, stroke_width=1.5, reverse=False, rate_func=linear)

Parameters

Parameter	Default	Description
`target`	Required	Annotation to draw: Text, Callout, ResidueLabel, ResidueLabels, Distance, or InteractionHighlight.
`lag_ratio`keyword only	`None`	Delay between glyph starts relative to glyph duration; None chooses a value from glyph count.
`stroke_width`keyword only	`1.5`	Glyph outline width in design pixels at 1080p.
`reverse`keyword only	`False`	Reverse residue or glyph order.
`rate_func`keyword only	`linear`	Callable that maps progress in [0, 1] to a finite value in [0, 1].

Notes

Works on text, callouts, residue labels, rulers, and interaction lines. Timing follows Manim’s MIT-licensed writing animation. lag_ratio=None chooses a delay based on the glyph count.

Example and output

This excerpt runs inside a scene’s construct() method. The full example file includes imports, structure loading, and camera setup. Run it from a repository checkout.

Code Scene excerpt

title = Text(
    "Protein motion",
    font_size=130,
    font="semibold",
    position=(0.1, 0.38),
)
self.play(
    Write(title, lag_ratio=0.12, stroke_width=1.8),
    run_time=2.5,
)
self.wait(1)
self.play(Unwrite(title), run_time=1.5)

Output Preview · 5.0 s · 60 fps

Write and Unwrite

Letter outlines are drawn, filled, and erased.

Full source: Writing Download MP4

Methods and properties

Name	Description
apply()method	Evaluate the animation at eased progress alpha. Called by the timeline.
bind()method · inherited from Animation	Capture starting values when the scene schedules the animation.
targetsproperty · inherited from Animation	Objects whose state this animation changes.