mirror of https://github.com/CGAL/cgal
91 lines
3.4 KiB
C++
91 lines
3.4 KiB
C++
#ifndef CGAL_VECTOR_DETPTS_H
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#define CGAL_VECTOR_DETPTS_H
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#include <CGAL/functor_tags.h>
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#include <CGAL/Dimension.h>
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namespace CGAL {
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template <class LA, class Dim_=LA::Dimension, class Max_dim_=LA::Max_dimension,
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bool = LA::template Property<Has_determinant_of_points_tag>::value,
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bool = LA::template Property<Has_determinant_of_vectors_tag>::value
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&& LA::template Property<Has_plus_minus_tag>::value>
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struct Add_determinant_of_points_from_vectors_and_minus : LA {
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template< class D2, class D3=D2 >
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struct Rebind_dimension {
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typedef typename LA::template Rebind_dimension<D2,D3> LA2;
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typedef Add_determinant_of_vectors_small_dim<LA2> Other;
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};
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};
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//FIXME: Use variadics and boost so it works in any dimension.
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template <class LA, class Max_dim_>
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struct Add_determinant_of_points_from_vectors_and_minus
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<LA, Dimension_tag<2>, Max_dim_, false, true> : LA {
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template< class D2, class D3=D2 >
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struct Rebind_dimension {
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typedef typename LA::template Rebind_dimension<D2,D3> LA2;
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typedef Add_determinant_of_points_from_vectors_and_minus<LA2> Other;
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};
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template<class P,class=void> struct Property : LA::template Property<P> {};
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template<class D> struct Property<Has_determinant_of_points_tag, D> :
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boost::true_type {};
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static NT determinant_of_points(Vector const&a, Vector const&b,
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Vector const&c){
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return LA::determinant_of_vectors(b-a,c-a);
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}
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static Sign sign_of_determinant_of_points(Vector const&a, Vector const&b,
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Vector const&c){
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return LA::sign_of_determinant_of_vectors(b-a,c-a);
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}
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};
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template <class LA, class Max_dim_>
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struct Add_determinant_of_points_from_vectors_and_minus
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<LA, Dimension_tag<3>, Max_dim_, false, true> : LA {
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template< class D2, class D3=D2 >
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struct Rebind_dimension {
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typedef typename LA::template Rebind_dimension<D2,D3> LA2;
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typedef Add_determinant_of_points_from_vectors_and_minus<LA2> Other;
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};
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template<class P,class=void> struct Property : LA::template Property<P> {};
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template<class D> struct Property<Has_determinant_of_points_tag, D> :
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boost::true_type {};
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static NT determinant_of_points(Vector const&a, Vector const&b,
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Vector const&c, Vector const&d){
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return LA::determinant_of_vectors(b-a,c-a,d-a);
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}
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static Sign sign_of_determinant_of_points(Vector const&a, Vector const&b,
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Vector const&c, Vector const&d){
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return LA::sign_of_determinant_of_vectors(b-a,c-a,d-a);
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}
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};
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template <class LA, class Max_dim_>
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struct Add_determinant_of_points_from_vectors_and_minus
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<LA, Dimension_tag<4>, Max_dim_, false, true> : LA {
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template< class D2, class D3=D2 >
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struct Rebind_dimension {
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typedef typename LA::template Rebind_dimension<D2,D3> LA2;
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typedef Add_determinant_of_points_from_vectors_and_minus<LA2> Other;
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};
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template<class P,class=void> struct Property : LA::template Property<P> {};
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template<class D> struct Property<Has_determinant_of_points_tag, D> :
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boost::true_type {};
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static NT determinant_of_points(Vector const&a, Vector const&b,
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Vector const&c, Vector const&d, Vector const&e){
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return LA::determinant_of_vectors(b-a,c-a,d-a,e-a);
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}
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static Sign sign_of_determinant_of_points(Vector const&a, Vector const&b,
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Vector const&c, Vector const&d, Vector const&e){
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return LA::sign_of_determinant_of_vectors(b-a,c-a,d-a,e-a);
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}
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};
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//TODO: Go up to 6. First check that it won't be done differently eventually.
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}
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#endif
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