How to implement low pass filter using java

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I have a page describing a very simple, very low-CPU low-pass filter that is also able to be framerate-independent. I use it for smoothing out user input and also for graphing frame rates often.

http://phrogz.net/js/framerate-independent-low-pass-filter.html

In short, in your update loop:

// If you have a fixed frame rate
smoothedValue += (newValue - smoothedValue) / smoothing

// If you have a varying frame rate
smoothedValue += timeSinceLastUpdate * (newValue - smoothedValue) / smoothing

A smoothing value of 1 causes no smoothing to occur, while higher values increasingly smooth out the result.

The page has a couple of functions written in JavaScript, but the formula is language agnostic.

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