I did
(re-write your formulae and expand out the brackets:)
lo = c - (c*d)
hi = c + d - (c*d)
subtracting lo from hi gives
d = lo - hi
we have
lo = c - (c*d) = c*(1-d)
divide by (1-d):
lo/(1-d) = c
then substitute d=lo-hi into this to give
c = lo/(1-(lo-hi)) = lo/(1 - hi + lo)
I hope all that's clear, let me know if not.
Nathaniel2009/7/23 Uri Sala <urisala@xxxxxxxxx>
hey, thanks a lot!
I tried to solve the equations myself, to no avail. How did you solve it,
what factor did you isolate?
--
Nathaniel Virgo wrote:
>
> Hi Uri
>
> From solving your formulae as simultaneous equations it looks like
> deviation = lo - hi;
> center = lo/(1 - lo + hi);
>
> hth
> Nathaniel
>
>
> 2009/7/23 Uri Sala <urisala@xxxxxxxxx>
>
>> Hey
>>
>> I am controlling 2 variables, the center pitch and the deviation, through
>> 2
>> knobs. I am visualizing what this in a range slider through the following
>> formula:
>>
>> lo = center - (center * deviation);
>> hi = center + ((1 - center) * deviation);
>> This means I visualize center and dev as a sort of rrand(lo,hi).
>>
>> Now, I would also like to control these variables through the slider,
>> but
>> I cannot seem to find the formula that gives me the center and the
>> deviation
>> knowing upper and lower limits. Any clues?
>>
>> Thanks
>> Uri
>>
>
>
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