[Bf-python] AngleBetweenVecs found solution

[Martin DeMello]

On 10/10/05, Campbell Barton <cbarton at metavr.com> wrote:
>     //normalize vectors
>     norm_a = (double)sqrt(test_v1);
>     norm_b = (double)sqrt(test_v2);
>     for(x = 0; x < size; x++) {
>         vec_a[x] /= norm_a;
>         vec_b[x] /= norm_b;
>     }
>     //dot product
>     for(x = 0; x < size; x++) {
>         dot += vec_a[x] * vec_b[x];
>     }

I think it would be slightly more accurate to take the dot product of
the unnormalised vectors, then divide by (norm_a * norm_b)

martin