mirror of https://github.com/CGAL/cgal
96 lines
2.0 KiB
C++
96 lines
2.0 KiB
C++
#ifndef CGAL_MESH_DEFAULT_TRAITS_2_H
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#define CGAL_MESH_DEFAULT_TRAITS_2_H
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namespace CGAL {
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template <class K>
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class Mesh_default_traits_2 : public K
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{
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double B;
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public:
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Mesh_default_traits_2(const double bound = 0.125) : B(bound) {};
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inline
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double bound() const { return B; };
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inline
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void set_bound(const double bound) { B = bound; };
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class Is_bad
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{
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const double B;
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public:
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typedef typename K::Point_2 Point_2;
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typedef Mesh_default_traits_2<K> Traits;
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Is_bad(const double bound) : B(bound) {};
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bool operator()(const Point_2& a,
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const Point_2& b,
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const Point_2& c) const
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{
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Compute_squared_minimum_sine_2 squared_sine =
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Traits().compute_squared_minimum_sine_2_object();
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if( squared_sine(a,b,c) >= B )
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return false;
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else
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return true;
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};
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};
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Is_bad is_bad_object() const
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{ return Is_bad(B); }
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class Compute_squared_minimum_sine_2
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{
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public:
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typedef typename K::Point_2 Point_2;
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typedef typename K::Triangle_2 Triangle_2;
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typedef typename K::Compute_area_2 Compute_area_2;
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typedef typename K::Compute_squared_distance_2
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Compute_squared_distance_2;
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typedef typename K::FT FT;
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double operator()(const Point_2& pa,
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const Point_2& pb,
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const Point_2& pc) const
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{
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K k;
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Compute_area_2 area_2 = k.compute_area_2_object();
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Compute_squared_distance_2 squared_distance =
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k.compute_squared_distance_2_object();
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Triangle_2 t = k.construct_triangle_2_object()(pa,pb,pc);
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double area = 2*to_double(area_2(t));
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area=area*area;
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double
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a = squared_distance(pb, pc),
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b = squared_distance(pc, pa),
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c = squared_distance(pa, pb);
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if(a<b)
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if(a<c)
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return area/(b*c);
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else
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return area/(a*b);
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else
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if(b<c)
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return area/(a*c);
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else
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return area/(a*b);
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}
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};
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Compute_squared_minimum_sine_2
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compute_squared_minimum_sine_2_object() const
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{ return Compute_squared_minimum_sine_2(); }
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};
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}; // end namespace CGAL
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#endif
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