> Alain and Stephen S
>
> thank you for your previous help but I got stuck one more time, the picture
> below explains nicely why I am stuck. Can you tell me what am I doing wrong?
>
> http://www.kitchendesigned.com/public_download/bezier_.jpg
>
> I appreciate your kind efforts very much.
>
>

The last point of segment E is not the same as the first of segment A: 
<0,115> VS. <0,90>

When using bezier spline, there is NO auto-closing of the shape. If the 
spline is open, it disapears completely. That's because you can no 
longer unequivocaly determine if any point is inside the prism or not.


Alain

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