[Insight-developers] question regarding direction cosines

[Leila baghdadi]

Hi guys

I am writing ImageIO classes for our specific file format (minc2) which
is like itk N-dimensional,

I am a bit confused about how to create a correct matrix for direction
cosines,

suppose I have an image with the following

u,x,r,y,w,z

so direction cosines are only for x,y,z

the question is what is the correct way to create m_Direction of
itkImageIOBase.*

do I create a matrix (6x3) where I have (0,0,0) (1,0,0) (0,0,0) 

or basically how do you carry the correct index for the spatial
dimensions,

Hopefully my question is clear if not please let me know

Thanks

Leila