My name is Lorenzo Crescini  and I'm Italian. These "Flashes on
Good and evil" reflect the same mood characterizing the Flashes on
the Holy Gospels and Turin's Holy Shroud I wrote in Africa: making
myself useful to our Lord Jesus Christ.

I am an experienced Java developer and since a few weeks I joined a project
which involved real time rendering of 3D objects and interaction with those
objects. I have a problem for which I hope that an experienced 3D programmer
can help me.

for an expert in Java3D this might be an easy question. For me, novice,
it's driving me nuts...
Problem:
I have a StartPoint (sx,sy,sz) and a EndPoint (ex,ey,ez).