M3EMotion class

Spring animation configuration for Material 3 Expressive components.

Use to customize the spring physics for component animations.

Motion Presets

The class provides two families of presets:

• Spatial motions: animate shapes (like border radius)
• Effects motions: animate opacity/scale effects

Each family has three speed variants:

• Fast: Snappy, responsive animations
• Default: Balanced feel
• Slow: More relaxed, dramatic animations

Custom Motion

Use M3EMotion.custom to create a custom spring with specific physics:

M3EMotion.custom(1600, 0.85)

Annotations

• @immutable

Constructors

M3EMotion.custom({required double stiffness, required double damping})

Creates a custom spring motion with the specified physics.

const

Properties

damping → double

Spring damping. Values closer to 1 make the spring less bouncy.

final

hashCode → int

The hash code for this object.

no setter, override

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

snapToEnd → bool

Whether the spring should snap to the end position.

final

stiffness → double

Spring stiffness. Higher values make the spring snappier.

final

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toMotion() → SpringMotion

Converts this M3EMotion to a SpringMotion for animation use.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

override

Constants

expressiveEffectsDefault → const M3EMotion

Default expressive effects motion (stiffness: 1600, damping: 1).

expressiveEffectsFast → const M3EMotion

Fast expressive effects motion (stiffness: 3800, damping: 1).

expressiveEffectsSlow → const M3EMotion

Slow expressive effects motion (stiffness: 800, damping: 1).

expressiveSpatialDefault → const M3EMotion

Default expressive spatial motion (stiffness: 380, damping: 0.8).

expressiveSpatialFast → const M3EMotion

Fast expressive spatial motion (stiffness: 800, damping: 0.6).

expressiveSpatialSlow → const M3EMotion

Slow expressive spatial motion (stiffness: 200, damping: 0.8).

standardEffectsDefault → const M3EMotion

Default effects motion (stiffness: 1600, damping: 1).

standardEffectsFast → const M3EMotion

Fast effects motion (stiffness: 3800, damping: 1).

standardEffectsSlow → const M3EMotion

Slow effects motion (stiffness: 800, damping: 1).

standardSpatialDefault → const M3EMotion

Default spatial motion (stiffness: 700, damping: 0.9).

standardSpatialFast → const M3EMotion

Fast spatial motion (stiffness: 1400, damping: 0.9).

standardSpatialSlow → const M3EMotion

Slow spatial motion (stiffness: 300, damping: 0.9).