CGAL users discussion list

[Ben Supnik <>]

Hi Y'all,

I'm working with the bezier curve traits and the arrangement classes.

My source beziers always have two control points, e.g. they are always

P1--C1--C2--P2

always cubics.  But...sometimes either C1==P1 or C2==P2.

Since my own code simply runs the parameterized equation from t=0 to 1, 
my code doesn't terribly care that the bezier is "degenerate" at one 
end.  This condition triggers a precondition violation in CGAL.

Is there a conversion to convert a "degenerate" cubic bezier into, um, 
something else?  Or a way to represent this safely in CGAL?  Currently I 
reduce the bezier to a quadratic and I can see the error of my ways...

cheers
Ben

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