mirror of
https://github.com/photonstorm/phaser
synced 2024-12-24 20:13:35 +00:00
36 lines
864 B
JavaScript
36 lines
864 B
JavaScript
// Work out what % value is of the range between min and max.
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// If max isn't given then you get the % of value to min.
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// You can optionally specify an upperMax, which is a mid-way point in the range
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// that represents 100%, after which the % starts to go down to zero again.
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var Percent = function (value, min, max, upperMax)
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{
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if (max === undefined) { max = min + 1; }
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var percentage = (value - min) / (max - min);
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if (percentage > 1)
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{
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if (upperMax !== undefined)
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{
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percentage = ((upperMax - value)) / (upperMax - max);
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if (percentage < 0)
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{
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percentage = 0;
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}
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}
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else
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{
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percentage = 1;
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}
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}
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else if (percentage < 0)
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{
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percentage = 0;
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}
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return percentage;
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};
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module.exports = Percent;
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