> What is the exact math you are using? I am interested in adapting this
> as a waveform...there are a few other patterns that could use something
> like this. My blob pattern for instance.
> 
	atan(x*M_PI_2)/M_PI_2

	Everything is brought into the [-1, 1] range. Order is
preserved and it is very near identity around 0...

		Jerome
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