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8 lines
198 B
JavaScript
8 lines
198 B
JavaScript
function backInOut(t) {
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var s = 1.70158 * 1.525
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if ((t *= 2) < 1)
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return 0.5 * (t * t * ((s + 1) * t - s))
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return 0.5 * ((t -= 2) * t * ((s + 1) * t + s) + 2)
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}
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module.exports = backInOut |