Function jitterAbsolute

Returns a Jitterer that works with absolute values, ie. values outside of 0..1 range.

Jitter amount is absolute, meaning a fixed value regardless of input value, or relative, meaning it is scaled according to input value.

// Jitter by -10 to +10 (absolute value: 10)
const j1 = jitterAbsolute({ absolute: 10 });
j1(100); // Produces range of 90...110

// Jitter by -20 to +20 (relative value 20%)
const j2 = jitterAbsolute({ relative: 0.20 });
j2(100); // Produces a range of -80...120
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The expected used case is calling jitterAbsolute to set up a jitterer and then reusing it with different input values, as above with the j1 and j2.

However to use it 'one-off', just call the returned function immediately:

const v = jitterAbsolute({ absolute: 10 })(100); // v is in range of 90-110
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When clamped is true, return value is clamped to 0...value. That is, rather than the usual bipolar jittering, the jittering only goes below.

const j = jitterAbsolute({ absolute: 10, clamped: true })
j(100); // Produces range of 90-100
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