mirror of
https://github.com/photonstorm/phaser
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32 lines
597 B
JavaScript
32 lines
597 B
JavaScript
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var Out = function (v, amplitude, period)
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{
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if (amplitude === undefined) { amplitude = 0.1; }
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if (period === undefined) { period = 0.1; }
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if (v === 0)
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{
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return 0;
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}
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else if (v === 1)
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{
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return 1;
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}
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else
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{
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var s = period / 4;
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if (amplitude < 1)
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{
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amplitude = 1;
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}
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else
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{
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s = period * Math.asin(1 / amplitude) / (2 * Math.PI);
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}
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return (amplitude * Math.pow(2, -10 * v) * Math.sin((v - s) * (2 * Math.PI) / period) + 1);
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}
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};
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module.exports = Out;
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