Lots of Actors (Peter Hansen)

[Yi-Yu Chou]

Sorry !!! I didn't explain my problem clearly.
My problem is not the slowness of the execution, but the "unsommothness" 
when
displaying the line segments. The reason that casues the problem is : I 
used too many 
actors to represent line segments. Therefore, I tried to find a new method 
to do it.
Thanks for your help !!!!

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