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gml_GlobalScript_ease_inout_quad

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function ease_inout_quad(arg0, arg1, arg2, arg3)
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{
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    arg0 /= (arg3 * 0.5);
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    if (arg0 < 1)
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        return (arg2 * 0.5 * (arg0 * arg0)) + arg1;
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    return (-arg2 * 0.5 * ((--arg0 * (arg0 - 2)) - 1)) + arg1;
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}