CGAL users discussion list

["xiangzhi wei" <>]

Dear Fernando Cacciola,

Right.
In fact, it will be precisely as different as the result you see in the first
example you posted.

Look at it this way: if the two refex wavefronts don't *exactly* collide
simulatenously, then one goes past the other: that is the blue bisector coming
out of the split point that your are seeing.

That is exactly what I wanted to express, but, when there are a number of "vertex events" in a polygon, guess what will happen, the straight skeleton can be different a lot, beyond our expectition.

That's why I wanted to see the exact polygon you used: to see if there should be
a vertex event, or just almost so.

I am sorry, I did not  save it, but you can also  do some experiment on "Straight_Skeleton_2"  with some polygons alike. If you want to further discuss those degeneration cases, please refer to the attached file. In fact, I hope some one can explain them in a mathematical way. And how to avoid those cases.

Best regards,

xiangzhi

Attachment: degeneration cases.doc
Description: MS-Word document