On 23/04/2012 8:19 AM, Bill Pragnell wrote:
> Stephen<mcavoys_at@aoldotcom>  wrote:
>> I am looking for a function to use in an isosurface that will give me
>> ripples that will decay to zero over a short distance.
>> Can anyone suggest one?
>
> How about something like:
>
> sin(a*x)*exp(-b*x^2)
>
> Plot it, e.g., here for a quick preview:
> http://rechneronline.de/function-graphs/
>
> For more ripples over a given range, increase a
> For a greater range, decrease b
>
> Bill
>
>
  Ah! The exponential, just what I was looking for.
It is true that if you don't use it, you lose it.

Thanks Bill

-- 
Regards
     Stephen

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