phaser/v3/src/math/easing/Sine.js at 5ba2a6ca645d679dbd7519b3e4b751ce22a96ea7 · ITCSsDeveloper/phaser · GitHub

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function In (v)
{
    if (v === 0)
    {
        return 0;
    }
    else if (v === 1)
    {
        return 1;
    }
    else
    {
        return 1 - Math.cos(v * Math.PI / 2);
    }
}

function Out (v)
{
    if (v === 0)
    {
        return 0;
    }
    else if (v === 1)
    {
        return 1;
    }
    else
    {
        return Math.sin(v * Math.PI / 2);
    }
}

function InOut (v)
{
    if (v === 0)
    {
        return 0;
    }
    else if (v === 1)
    {
        return 1;
    }
    else
    {
        return 0.5 * (1 - Math.cos(Math.PI * v));
    }
}

module.exports = {

    In: In,
    Out: Out,
    InOut: InOut

};