Hi Ana,
I'm not sure Caret (caret5, at least) does what you want. There is this:
caret_command -surface-geodesic
<surface-coord>
<surface-topo>
<output-metric>
<smoothed>
[-node node-number]
Generate the geodesic distance from all nodes to all other nodes
unless a node number is specified in which case the distances are
output for the specified node to all nodes.
Uses dijkstra's algorithm with reuse of information from previous
root nodes. If smoothed is 'true', it traces paths over adjacent
triangles in order to generate distances for some 2hop neighbors.
This causes the contours of equal distance to be closer to circular,
and also makes the distances more consistent for a mesh which has
been streched nonuniformly. It is almost as fast as unsmoothed.
surface-coord the surface coord file
surface-topo the surface topo file
output-metric output metric file for geodesic distance
You could generate a topology file that excluded the corpus callosum, if you
have a label/parcellation/paint file that identifies the CC. You could use the
Surface: ROI menu or caret_command to successively exclude any vertices to be
avoided from your topo file.
But when you click on the surface in the GUI ("ID nodes"), you get the
Euclidean distance between the points -- not the geodesic distance.
Donna
On Jan 29, 2013, at 4:23 AM, Ana Gomes <[email protected]> wrote:
> Dear all,
>
>
> My question is about how caret calculates the surface distance between two
> centers of gravity. Does it calculate the minimum distance between the
> centers (passing through the minimum #nodes) or are there some default
> constraints?
>
> How can I produce I file that constraints the way we calculate the distances,
> for example calculate the distances avoiding the corpus callosum?
>
>
> Thank you,
>
>
> Ana
>
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