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move the implementation of segment_hides_circumcenter() to the kernel

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to use filtered predicates
This commit is contained in:
Jane Tournois
2021-09-10 11:26:53 +02:00
parent 64738572f8
commit 7e3af5cbda
3 changed files with 63 additions and 19 deletions
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Homogeneous_kernel/include/CGAL/Homogeneous/function_objects.h
+28
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@@ -4670,6 +4670,7 @@ namespace HomogeneousKernelFunctors {
typedef typename K::Circle_2 Circle_2;
typedef typename K::Line_2 Line_2;
typedef typename K::Triangle_2 Triangle_2;
typedef typename K::Segment_2 Segment_2;
public:
typedef typename K::Oriented_side result_type;
@@ -4709,6 +4710,33 @@ namespace HomogeneousKernelFunctors {
? ON_ORIENTED_BOUNDARY
: -ot;
}
result_type
operator()(const Segment_2& s, const Triangle_2& t) const
{
typename K::Construct_source_2 source;
typename K::Construct_target_2 target;
typename K::Construct_circumcenter_2 circumcenter;
typename K::Orientation_2 orientation;
const Point_2 a = source(s);
const Point_2 b = target(s);
const Point_2 cc = circumcenter(t);
CGAL::Orientation o_abc = orientation(a, b, cc);
if (o_abc == CGAL::COLLINEAR)
return CGAL::ON_ORIENTED_BOUNDARY;
CGAL::Orientation o_abt = orientation(a, b, t[0]);
if (o_abt == CGAL::COLLINEAR)
o_abt = orientation(a, b, t[1]);
if (o_abt == CGAL::COLLINEAR)
o_abt = orientation(a, b, t[2]);
CGAL_assertion(o_abt != CGAL::COLLINEAR);
if (o_abc == o_abt) return CGAL::ON_POSITIVE_SIDE;
else return CGAL::ON_NEGATIVE_SIDE;
}
};