On Fri, Feb 04, 2011 at 05:40:47PM +0100, LI Hongying wrote:
>    Thanks for your [1]script, and the generated image is really beautiful.
>    But I do not quite understand, In that script, you are trying to join all
>    the line together ?
>    ( Maybe I should have one object associated with many lines, But they are
>    not connected in fact. )

It may be a bit confusing at first, but what this script is doing is
representing many lines not connected together in a same dataset. To
create this dataset, you thus have to concatenate the point defining the
lines and create an explicit connectivity: what is connected and what is
not. This is what is done in the for loop of the script. You can replace
the x, y, z and s arrays that are generated at each for loop by your
lines (DTI tracts, I guess). You will then have to be careful that the
connectivity that you are specifying (in the connections.append... line)
then has a 'N' that depends on the number of points in your line.

I know it takes a little while to wrap one's head around this way of
specifying lines, but once you 'get' it, it's really powerful. Another
way of seeing this is that you are specifying a more general graph (set
of connected points) than simply one line, as in the graph-based examples
(the Flight graph, for instance).

Hope this helps,

Gael

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