export function circleIn(t) {
return 1 - Math.sqrt(1 - t * t);
}
export function circleOut(t) {
return Math.sqrt(1 - --t * t);
}
export function circleInOut(t) {
return ((t *= 2) <= 1 ? 1 - Math.sqrt(1 - t * t) : Math.sqrt(1 - (t -= 2) * t) + 1) / 2;
}
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