[Bf-python] Mathutils additions

[jms]

guignot wrote:

>Le Samedi 17 Juillet 2004 12:03, Campbell Barton a écrit :
>  
>
>>Hi, The method is as follows in C
>>
>>        length = sqrt(pow((v2[0] - v1[0]),2) + pow((v2[1] - v1[1]),2) +
>>pow((v2[2] - v1[2]),2) );
>>    
>>
>
>Try to avoid pow(x,2), it is too long.
>
>x*x is much faster!
>
>
>  
>

x=2.0
n=2.0
 x**n

for  pow(x,n)
and:

x=2.0
n=0.5
 x**n

for  sqrt(2.0)

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