[vtk-developers] 3x3 rotation matrices

Bill Lorensen bill.lorensen at gmail.com
Sun Jan 10 13:14:45 EST 2010


Is this a hypothetical question or do you have a specific need? You
can always extract a 4x4 and create your  own 3x3 in your application.
vtk does not have a vtkMatrix3x3.

Bill

On Sun, Jan 10, 2010 at 1:08 PM, David Doria <daviddoria+vtk at gmail.com> wrote:
> On Sun, Jan 10, 2010 at 1:03 PM, Bill Lorensen <bill.lorensen at gmail.com> wrote:
>> vtk uses homogenous coordinates. Why extract a 3x3?
>>
>> Bill
>
> If you are implementing an algorithm that has a 3x3 multiplication and
> you want to create a rotation matrix. Or for creating a 2d rotation in
> homogeneous (now 3d) coordinates. If there is a Matrix3x3 class, you
> should be able to create common matrices in that type, no?
>
> Thanks,
>
> David
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