15 lines
253 B
JavaScript
15 lines
253 B
JavaScript
var pi = Math.PI,
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halfPi = pi / 2;
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export function sinIn(t) {
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return (+t === 1) ? 1 : 1 - Math.cos(t * halfPi);
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}
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export function sinOut(t) {
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return Math.sin(t * halfPi);
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}
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export function sinInOut(t) {
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return (1 - Math.cos(pi * t)) / 2;
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}
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