sure. You can convert the surface into ascii with mris_convert or load it
directly into matlab with read_surf. The normal is then the cross product
of two of the legs of each triangle. Sorry, I don't remember the ordering
but it should be obvious if you have it wrong. The indices of the vertices
in the surfaces are invariant, so the same index can be used to find the
corresponding surface on the ?h.white and ?h.pial surfaces.
Bruce
On Wed, 18 Jan 2006, XJ Kang wrote:
Hi,
Anywhere in the "surf" directory I can find the normal direction of each node
on the GM/WM surface? Or anyway I can calculate the normal direction from the
surface files? How about the direction between the correspoding two points on
the GM/WM surface and pial surface? Thanks.
XJ Kang
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