Easing Functions¶

Header: winui/ui/Animation.hpp.

struct BackEase¶

Pulls back by amplitude before moving (t³ − t·a·sin(πt)).

Example:

auto element = std::make_unique<ui::RectangleControl>();
element->start_animation(ui::AnimatedProperty::TranslationY,
                         ui::DoubleAnimation{.to       = 0.0f,
                                             .duration = 400ms,
                                             .easing   = ui::BackEase{.amplitude = 0.5f}});

Field	Type	Default
`amplitude`	`float`	`1.0f`	How far it pulls back; 0 is plain t cubed.
`mode`	`EasingMode`	`EasingMode::EaseOut`	Which end the curve applies to.

struct BounceEase¶

bounces bounces, each bounciness times smaller than the last (clamped above 1).

Field	Type	Default
`bounces`	`int`	`3`	Number of bounces; negative is taken as 0.
`bounciness`	`float`	`2.0f`	Ratio between successive bounce heights.
`mode`	`EasingMode`	`EasingMode::EaseOut`	Which end the curve applies to.

struct CircleEase¶

A quarter circle.

Field	Type	Default
`mode`	`EasingMode`	`EasingMode::EaseOut`	Which end the curve applies to.

struct CubicEase¶

t³.

Field	Type	Default
`mode`	`EasingMode`	`EasingMode::EaseOut`	Which end the curve applies to.

struct ElasticEase¶

oscillations swings, damped exponentially by springiness.

Field	Type	Default
`oscillations`	`int`	`3`	Number of swings; negative is taken as 0.
`springiness`	`float`	`3.0f`	Exponential damping of the swings.
`mode`	`EasingMode`	`EasingMode::EaseOut`	Which end the curve applies to.

struct ExponentialEase¶

(e^(k·t) − 1) / (e^k − 1).

Field	Type	Default
`exponent`	`float`	`2.0f`	k in the formula; 0 is linear.
`mode`	`EasingMode`	`EasingMode::EaseOut`	Which end the curve applies to.

struct PowerEase¶

t^power (a negative power is taken as 0).

Field	Type	Default
`power`	`float`	`2.0f`	The exponent.
`mode`	`EasingMode`	`EasingMode::EaseOut`	Which end the curve applies to.

struct QuadraticEase¶

t².

Field	Type	Default
`mode`	`EasingMode`	`EasingMode::EaseOut`	Which end the curve applies to.

struct QuarticEase¶

t⁴.

Field	Type	Default
`mode`	`EasingMode`	`EasingMode::EaseOut`	Which end the curve applies to.

struct QuinticEase¶

t⁵.

Field	Type	Default
`mode`	`EasingMode`	`EasingMode::EaseOut`	Which end the curve applies to.

struct SineEase¶

A quarter sine.

Field	Type	Default
`mode`	`EasingMode`	`EasingMode::EaseOut`	Which end the curve applies to.

Tests¶

tests/test_animation.cpp