| 135 |
|
|
| 136 |
|
return tmp; |
| 137 |
|
} |
| 138 |
– |
|
| 139 |
– |
/** |
| 140 |
– |
* Returns the tensor contraction (double dot product) of two rank 2 |
| 141 |
– |
* tensors (or Matrices) |
| 142 |
– |
* @param t1 first tensor |
| 143 |
– |
* @param t2 second tensor |
| 144 |
– |
* @return the tensor contraction (double dot product) of t1 and t2 |
| 145 |
– |
*/ |
| 146 |
– |
Real doubleDot( const SquareMatrix<Real, Dim>& t1, const SquareMatrix<Real, Dim>& t2 ) { |
| 147 |
– |
Real tmp; |
| 148 |
– |
tmp = 0; |
| 149 |
– |
|
| 150 |
– |
for (unsigned int i = 0; i < Dim; i++) |
| 151 |
– |
for (unsigned int j =0; j < Dim; j++) |
| 152 |
– |
tmp += t1[i][j] * t2[i][j]; |
| 153 |
– |
|
| 154 |
– |
return tmp; |
| 155 |
– |
} |
| 138 |
|
|
| 157 |
– |
|
| 139 |
|
/** Tests if this matrix is symmetrix. */ |
| 140 |
|
bool isSymmetric() const { |
| 141 |
|
for (unsigned int i = 0; i < Dim - 1; i++) |
