[Papervision3D] Quaternions vs matrix

[Philippe Ajoux]

Tim Knip wrote:
> Got a MatrixMath as3 class (4x4 OpenGL column-order) which I could
> contribute....
>
> A matrix in this class is an array and looks like this:
> [
>   [1, 0, 0, 0],
>   [0, 1, 0, 0],
>   [0, 0, 1, 0],
>   [0, 0, 0, 1]
> ];
>
> So its array instead of object (m.a0, m.a1 etc)...
> Would object-access be faster the array-access?
>
> Class methods:
> 1. makeScale
> 2. makeRotation
> 3. makeTranslation
> 4. mult
> 5. invert
> also some methods for creating texture Matrix.
>
> Tim
>
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>   
I just did a quick test with 3 object variables, and one 3 element array.
I then timed the milliseconds it takes to have each variable incremented 
by 1..
so,

x0++; x1++; x2++;

and

x[0]++; x[1]++; x[2]++;

To do this 90,000 times it took on average:

30 ms for the object access and 47 ms for array access. So object access 
is still faster in AS3.0.

Also, for kicks I wanted to know how long it would take to loop through 
the array using
a for loop instead of direct access. Takes about 81 ms.