winding order, to account for the possibility that different vertex sets
require different orders.

check data shape, and raise if bad.

used

the vertex set changes.

file path for vertex data key.

deprecation warning on access though.

method to query current vertex set.

incorrectly

trimesh ray.intersect_id function.

convinced that this is foolproof, but it seems to work.

featdesign.loadDesignMat function

by GiftiSurface. Adding comments to confusing model fit code to try
and make refreshing our memories easier.

kept in these classes, instead of in FSLeyes.

of (M*3,). New gifti module for basic gifti surface support.

identifying reference image associated with a FIRST vtk file.