Static EaseInQuad
EaseInQuad: (Anonymous function) = EasingFunctions.CreateReversibleEasingFunction((currentTime: number, startValue: number, endValue: number, duration: number) => {endValue = endValue - startValue;currentTime /= duration;return endValue * currentTime * currentTime + startValue;})
Standard easing functions for motion in Excalibur, defined on a domain of [0, duration] and a range from [+startValue,+endValue] Given a time, the function will return a value from positive startValue to positive endValue.
function Linear (t) { return t * t; } // accelerating from zero velocity function EaseInQuad (t) { return t * t; } // decelerating to zero velocity function EaseOutQuad (t) { return t * (2 - t); } // acceleration until halfway, then deceleration function EaseInOutQuad (t) { return t < .5 ? 2 * t * t : -1 + (4 - 2 * t) * t; } // accelerating from zero velocity function EaseInCubic (t) { return t * t * t; } // decelerating to zero velocity function EaseOutCubic (t) { return (--t) * t * t + 1; } // acceleration until halfway, then deceleration function EaseInOutCubic (t) { return t < .5 ? 4 * t * t * t : (t - 1) * (2 * t - 2) * (2 * t - 2) + 1; }