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

cubicInOut detail::cubicInOutEasing cubicInOut {} inlineconstexpr Cubic polynomial easing with balanced acceleration and deceleration. The cubicInOut easing function combines cubic acceleration and deceleration for smooth, professional motion. This is one of the most popular general-purpose easings. Motion profile: First half: Cubic acceleration (t³) Midpoint: Maximum velocity Second half: Cubic deceleration Creates smooth, balanced S-curve This easing is appropriate for: All-purpose animations: When in doubt, use this Web standards: CSS ease-in-out equivalent Design system defaults: Common in component libraries Cross-platform consistency: Works well everywhere Medium animations: 200-500ms sweet spot CubicInOut is frequently the default easing in design systems and animation libraries because it provides clear, professional motion that works for most scenarios. Mathematically: Combines cubicIn for t < 0.5 and cubicOut for t >= 0.5 // Page transition auto x = tweeny::from(0.0f) .to(1920.0f) .via(easing::cubicInOut) .during(40U) .build(); See also cubicIn For only acceleration cubicOut For only deceleration quadraticInOut For gentler motion quarticInOut For more dramatic motion Visualize at https://easings.net/#easeInOutCubic