Line data    Source code

       1              : // Copyright 2024, UChicago Argonne, LLC
       2              : // All Rights Reserved
       3              : // Software Name: NEML2 -- the New Engineering material Model Library, version 2
       4              : // By: Argonne National Laboratory
       5              : // OPEN SOURCE LICENSE (MIT)
       6              : //
       7              : // Permission is hereby granted, free of charge, to any person obtaining a copy
       8              : // of this software and associated documentation files (the "Software"), to deal
       9              : // in the Software without restriction, including without limitation the rights
      10              : // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
      11              : // copies of the Software, and to permit persons to whom the Software is
      12              : // furnished to do so, subject to the following conditions:
      13              : //
      14              : // The above copyright notice and this permission notice shall be included in
      15              : // all copies or substantial portions of the Software.
      16              : //
      17              : // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      18              : // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      19              : // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
      20              : // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      21              : // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
      22              : // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
      23              : // THE SOFTWARE.
      24              : 
      25              : #include "neml2/tensors/R3.h"
      26              : #include "neml2/tensors/Scalar.h"
      27              : #include "neml2/tensors/Vec.h"
      28              : #include "neml2/tensors/R2.h"
      29              : #include "neml2/tensors/assertions.h"
      30              : 
      31              : namespace neml2
      32              : {
      33              : 
      34              : R3
      35          290 : R3::levi_civita(const TensorOptions & options)
      36              : {
      37        12760 :   return R3::create({{{0, 0, 0}, {0, 0, 1}, {0, -1, 0}},
      38              :                      {{0, 0, -1}, {0, 0, 0}, {1, 0, 0}},
      39              :                      {{0, 1, 0}, {-1, 0, 0}, {0, 0, 0}}},
      40         1740 :                     options);
      41        11890 : }
      42              : 
      43              : Scalar
      44           54 : R3::operator()(Size i, Size j, Size k) const
      45              : {
      46          216 :   return base_index({i, j, k});
      47           54 : }
      48              : 
      49              : R2
      50            4 : R3::contract_k(const Vec & v) const
      51              : {
      52            4 :   neml_assert_batch_broadcastable_dbg(*this, v);
      53           20 :   return R2(at::einsum("...ijk,...k", {*this, v}), utils::broadcast_batch_dim(*this, v));
      54            4 : }
      55              : } // namespace neml2