v0.13.1
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dTensor0.hpp
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1/* Takes a derivative of a Tensor0<T*> yielding a Tensor1. */
2
3#pragma once
4
5namespace FTensor
6{
7 template <class T, int Dim, char i> class dTensor0
8 {
9 const Tensor0<T *> &a;
12
13 public:
14 typename promote<T, double>::V operator()(const int N) const
15 {
16 return (*(&a + d_ijk(N)) - *(&a - d_ijk(N))) * d_xyz(N) * 0.5;
17 }
19 const Tensor1<double, Dim> &D_xyz)
20 : a(A), d_ijk(D_ijk), d_xyz(D_xyz)
21 {}
22 };
23
24 template <class T, int Dim, char i>
26 Dim, i>
27 d(const Tensor0<T *> &a, const Index<i, Dim> index,
28 const Tensor1<int, Dim> &d_ijk, const Tensor1<double, Dim> &d_xyz)
29 {
30 using Tensor_Expr = dTensor0<T, Dim, i>;
32 Tensor_Expr(a, d_ijk, d_xyz));
33 }
34}
constexpr double a
dTensor0(const Tensor0< T * > &A, const Tensor1< int, Dim > &D_ijk, const Tensor1< double, Dim > &D_xyz)
Definition: dTensor0.hpp:18
const Tensor1< double, Dim > & d_xyz
Definition: dTensor0.hpp:11
const Tensor1< int, Dim > & d_ijk
Definition: dTensor0.hpp:10
const Tensor0< T * > & a
Definition: dTensor0.hpp:9
promote< T, double >::V operator()(const int N) const
Definition: dTensor0.hpp:14
FTensor::Index< 'i', SPACE_DIM > i
Tensors class implemented by Walter Landry.
Definition: FTensor.hpp:51
const Tensor1_Expr< const dTensor0< T, Dim, i >, typename promote< T, double >::V, Dim, i > d(const Tensor0< T * > &a, const Index< i, Dim > index, const Tensor1< int, Dim > &d_ijk, const Tensor1< double, Dim > &d_xyz)
Definition: dTensor0.hpp:27
constexpr AssemblyType A
Definition: plastic.cpp:46
const int N
Definition: speed_test.cpp:3