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7 | export const linear = (k: number): number => k;
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9 | export const quadraticIn = (k: number): number => k * k;
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11 | export const quadraticOut = (k: number): number => k * (2 - k);
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13 | export const quadraticInOut = (k: number): number => {
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14 | if ((k *= 2) < 1) return 0.5 * k * k;
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15 | return -0.5 * (--k * (k - 2) - 1);
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16 | };
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18 | export const cubicIn = (k: number): number => k * k * k;
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19 |
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20 | export const cubicOut = (k: number): number => --k * k * k + 1;
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22 | export const cubicInOut = (k: number): number => {
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23 | if ((k *= 2) < 1) return 0.5 * k * k * k;
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24 | return 0.5 * ((k -= 2) * k * k + 2);
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25 | };
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