crossProduct moved to dune-matrix-vector

dune/solvers/common/arithmetic.hh

@@ -14,6 +14,7 @@
 #include <dune/istl/scaledidmatrix.hh>
 
 #include <dune/matrix-vector/axpy.hh>
+#include <dune/matrix-vector/crossproduct.hh>
 #include <dune/matrix-vector/transpose.hh>
 
 #include <dune/solvers/common/resize.hh>
@@ -145,32 +146,6 @@ namespace Arithmetic
     template <bool Condition, typename Type=void>
     using enable_if_t = typename std::enable_if<Condition, Type>::type;
 
-   //! Helper class for computing the cross product
-    template <class T, int n>
-    struct CrossProductHelper
-    {
-        static Dune::FieldVector<T,n> crossProduct(const Dune::FieldVector<T,n>& a, const Dune::FieldVector<T,n>& b)
-        {
-            DUNE_UNUSED_PARAMETER(a);
-            DUNE_UNUSED_PARAMETER(b);
-            DUNE_THROW(Dune::Exception, "You can only call crossProduct with dim==3");
-        }
-    };
-
-    //! Specialisation for n=3
-    template <class T>
-    struct CrossProductHelper<T,3>
-    {
-        static Dune::FieldVector<T,3> crossProduct(const Dune::FieldVector<T,3>& a, const Dune::FieldVector<T,3>& b)
-        {
-            Dune::FieldVector<T,3> r;
-            r[0] = a[1]*b[2] - a[2]*b[1];
-            r[1] = a[2]*b[0] - a[0]*b[2];
-            r[2] = a[0]*b[1] - a[1]*b[0];
-            return r;
-        }
-    };
-
     template <class MatrixType>
     using Transposed = typename Dune::MatrixVector::Transposed<MatrixType>;
 
@@ -212,7 +187,7 @@ namespace Arithmetic
     template<class T, int n>
     Dune::FieldVector<T,n> crossProduct(const Dune::FieldVector<T,n>& a, const Dune::FieldVector<T,n>& b)
     {
-        return CrossProductHelper<T,n>::crossProduct(a,b);
+      return Dune::MatrixVector::crossProduct(a,b);
     }
 
     //! Compute the transposed of a matrix