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copied!<p>After looking at the problem for a while, and not being not very mathematically talented, I came up with an overly simplified algorithm (compared to some of the PWM formulas I found after Dithermaster pointed me in that direction). A couple of assumptions I made were first that the short pulse width is always 1, and the long pulse width is an integer between 1 and the vibration duration. I also assumed the long pulse width is a linear function of the vibration strength. In particular, the latter assumption is not accurate. I'm guessing the function should be something more like a decibel calculation ("strength" of vibration is akin to "loudness" of a sound).</p> <p>Posting my simplified solution in case it is useful for anyone else who ends up here. This is close enough for the application I am using it for, but I would still like something better. If anyone posts an alternative answer, I'll test and accept it if it is better.</p> <pre><code>public long[] genVibratorPattern( float intensity, long duration ) { float dutyCycle = Math.abs( ( intensity * 2.0f ) - 1.0f ); long hWidth = (long) ( dutyCycle * ( duration - 1 ) ) + 1; long lWidth = dutyCycle == 1.0f ? 0 : 1; int pulseCount = (int) ( 2.0f * ( (float) duration / (float) ( hWidth + lWidth ) ) ); long[] pattern = new long[ pulseCount ]; for( int i = 0; i < pulseCount; i++ ) { pattern[i] = intensity < 0.5f ? ( i % 2 == 0 ? hWidth : lWidth ) : ( i % 2 == 0 ? lWidth : hWidth ); } return pattern; } </code></pre>

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