afni.nimh.nih.gov

I need to calculate the distance between two points on grey matter. But the cortex consists of the grey-colored mass of folds and grooves. The distance based on the voxel in afni can not get the real distance. So I need to flatten the cortex and get the coordinate in surface-based coordinate or flattened-based coordinate.
I want to know if SUMA can give me the node coordinate in spherical-based mesh or flattened-based mesh.