SR2.h

// Copyright 2023, UChicago Argonne, LLC
// All Rights Reserved
// Software Name: NEML2 -- the New Engineering material Model Library, version 2
// By: Argonne National Laboratory
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#pragma once
 
#include "neml2/tensors/FixedDimTensor.h"
 
namespace neml2
{
class Scalar;
class R2;
class SFR3;
class SSR4;
class SFFR4;
class Rot;
class SWR4;
class WR2;
 
class SR2 : public FixedDimTensor<SR2, 6>
{
public:
  using FixedDimTensor<SR2, 6>::FixedDimTensor;
 
  SR2(const R2 & T);
 
  [[nodiscard]] static SR2 fill(const Real & a,
                                const torch::TensorOptions & options = default_tensor_options());
  [[nodiscard]] static SR2 fill(const Scalar & a);
  [[nodiscard]] static SR2 fill(const Real & a11,
                                const Real & a22,
                                const Real & a33,
                                const torch::TensorOptions & options = default_tensor_options());
  [[nodiscard]] static SR2 fill(const Scalar & a11, const Scalar & a22, const Scalar & a33);
  [[nodiscard]] static SR2 fill(const Real & a11,
                                const Real & a22,
                                const Real & a33,
                                const Real & a23,
                                const Real & a13,
                                const Real & a12,
                                const torch::TensorOptions & options = default_tensor_options());
  [[nodiscard]] static SR2 fill(const Scalar & a11,
                                const Scalar & a22,
                                const Scalar & a33,
                                const Scalar & a23,
                                const Scalar & a13,
                                const Scalar & a12);
  [[nodiscard]] static SR2
  identity(const torch::TensorOptions & options = default_tensor_options());
  [[nodiscard]] static SSR4
  identity_map(const torch::TensorOptions & options = default_tensor_options());
 
  SR2 rotate(const Rot & r) const;
  SR2 rotate(const R2 & R) const;
 
  SFR3 drotate(const Rot & r) const;
  SFFR4 drotate(const R2 & R) const;
 
  Scalar operator()(TorchSize i, TorchSize j) const;
 
  Scalar tr() const;
 
  SR2 vol() const;
 
  SR2 dev() const;
 
  Scalar det() const;
 
  Scalar inner(const SR2 & other) const;
 
  Scalar norm_sq() const;
 
  Scalar norm(Real eps = 0) const;
 
  SSR4 outer(const SR2 & other) const;
 
  SR2 inverse() const;
 
  SR2 transpose() const;
};
 
} // namespace neml2