[vtk-developers] 3x3 rotation matrices

[Aashish Chaudhary]

Bill,

While working on this current project I found out that there is a

vtkMatrix3x3 under Common. Also I think it could be useful to add
convenience methods (if there is none) to make a 4x4 from 3x3 matrix.

My 2 cents.

~Regards,
Aashish



On Sun, Jan 10, 2010 at 1:14 PM, Bill Lorensen <bill.lorensen at gmail.com>wrote:

> 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<daviddoria%2Bvtk 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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-- 
| Aashish Chaudhary
| R&D Engineer
| Kitware Inc.
| www.kitware.com
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