[ODE] Length calculation

[Oleh Derevenko]

Hi

Did not you think about changing dLength3() to use the same approach as dNormalize3() does? If there is a noticeable error in vector length after straight normalization via division by square root of vector component squares sum, that error comes from length calculation and hence, is present in result of dLength3().
What about calculating a vector length as product of largest vector component by length of vector after division by that largest component?

Oleh Derevenko
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