Hi Ziad,

ziad Wrote:
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> Problem solved, I hope. The gifti coordinates
> transform was being applied after center of mass
> computation. The next set of binaries will contain
> the fix.

Thanks for making this fix - I will give it a try once the new binaries are there.

Does that mean I should set the xform matrix m for the vertices such that m[0,0]=m[1,1]=-1 and m[2,2]=1, to achieve RAI/LPI compatibility? In your earlier post you mentioned " I do use GIFTI versions of FreeSurfer surfaces fine" - could you take a look and see what the xform matrix for the surface coordinates contains for these files?

I'm asking because we are adding support to GIFTI surface files in PyMVPA through the nibable package, and I would like to make sure that the files generated there are compatible with whatever GIFTI files typically contain, yet are also compatible with how other surface formats (currently ascii and caret binary are supported) are treated.

cheers,
Nick