On Thu, 5 Jun 2003 16:00:46 +0200, you wrote:

>I know a lot can be optimized, but unfortunately it's not one of my
>strong points. :) I tried to rewrite the formula, but none of the other
>forms gave me anything that was more efficient computationally.
>
>The formula calculates acceleration, measured by a digital
>accelerometer. The T1's en T2's are intervals whose variation is a
>measure of acceleration, relative to calibrated measurements as T1Cal
>(ZCal) and T2Cal. So a division like T2/T2Cal will always be close to 1.
>The output y is a measure for the acceleration. This will later be used
>in arcsin, sin and cos calculations. The result of those are arctan'ed;
>that's why I need precision.
>
>The range of the variables is about 0-20000, so their product is 4x10^8
>worst case. which is pretty much 32bit for my taste (ok it's 29, or 30
>with sign; close 'nuff :)).
>
>Anyway, y is always between -2 and +2. I do believe I need floats, but I
>may be mistaken.
..so use a multiplying factor to the numerator before the division, to =
scale up the output value to
give whatever precision you need.=20



=20

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