backIn backInOut backOut bounceIn bounceInOut bounceOut byName circularIn circularInOut circularOut cubicIn cubicInOut cubicOut def elasticIn elasticInOut elasticOut exponentialIn exponentialInOut exponentialOut linear quadraticIn quadraticInOut quadraticOut quarticIn quarticInOut quarticOut quinticIn quinticInOut quinticOut sinusoidalIn sinusoidalInOut sinusoidalOut stepped

exponentialOut detail::exponentialOutEasing exponentialOut {} inlineconstexpr Exponential easing with explosive start and gradual slow-down. The exponentialOut easing function starts with maximum velocity and decelerates exponentially, creating a smooth glide to a stop. The initial burst of speed followed by gradual settling creates a powerful, energetic feel. Characteristics: Immediate, explosive motion at the start Exponentially decreasing velocity Long, smooth deceleration phase Settles gently to final value This easing excels at: Quick UI responses: Instant feedback that settles smoothly Impact effects: Objects hitting and settling into place Momentum-based motion: Thrown objects, swipe gestures Energetic entrances: Elements that burst in with energy Modern UI patterns: iOS-style animations with quick start ExponentialOut is popular in modern mobile design because it provides immediate visual feedback (the fast start) while ending smoothly. Users perceive the interface as highly responsive due to the instant motion. The long tail of deceleration gives animations a "quality feel" - nothing stops abruptly. This is gentler on the eyes than linear or even cubic deceleration. Mathematically: f(t) = 1 - 2^(-10 * t) // Responsive drawer that slides out quickly then settles auto position = tweeny::from(-300.0f) .to(0.0f) .via(easing::exponentialOut) .during(35U) .build(); // Notification that pops in with energy auto scale = tweeny::from(0.0f) .to(1.0f) .via(easing::exponentialOut) .during(25U) .build(); See also exponentialIn For explosive acceleration at the start exponentialInOut For explosive motion at both ends quarticOut For strong but less extreme deceleration Visualize at https://easings.net/#easeOutExpo