CGAL users discussion list

["Thomas Zangl - Home" <>]

Hi!

>> How are the constructions filtered? Can you please give me an example?
>> 
>
>When you perform an orientation test for three lazy points
>it is first performed on the approximate points with double intervals.
>If this cannot been done the exact versions of the points are
>computed by applying the exact constructions of the DAG.

I thought an orientation test is a predicate not a construction? I
assumed that a construction ''computess'' a new geometric object like:
mySegment = dt.dual(myDelaunayFacet) (dual method of a Delaunay
triangulation).

What is the exact difference between a predicate and a construction?

Thank you!

Best regards,
-- 
,yours Thomas Zangl, Bakk.rer.soc.oec. - 

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