R2.h

// Copyright 2024, UChicago Argonne, LLC
// All Rights Reserved
// Software Name: NEML2 -- the New Engineering material Model Library, version 2
// By: Argonne National Laboratory
// OPEN SOURCE LICENSE (MIT)
//
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#pragma once
 
#include "neml2/tensors/PrimitiveTensor.h"
 
namespace neml2
{
class Scalar;
class Vec;
class SR2;
class R2;
class R3;
class R4;
class Rot;
class WR2;
 
template <class>
class VecBase;

class R2 : public PrimitiveTensor<R2, 3, 3>
{
public:
  using PrimitiveTensor<R2, 3, 3>::PrimitiveTensor;
 
  using PrimitiveTensor<R2, 3, 3>::fill;

  R2(const SR2 & S);

  R2(const WR2 & W);

  [[nodiscard]] static R2 fill(const CScalar & a,
                               const TensorOptions & options = default_tensor_options());
  [[nodiscard]] static R2 fill(const Scalar & a);
  [[nodiscard]] static R2 fill(const CScalar & a11,
                               const CScalar & a22,
                               const CScalar & a33,
                               const TensorOptions & options = default_tensor_options());
  [[nodiscard]] static R2 fill(const Scalar & a11, const Scalar & a22, const Scalar & a33);
  [[nodiscard]] static R2 fill(const CScalar & a11,
                               const CScalar & a22,
                               const CScalar & a33,
                               const CScalar & a23,
                               const CScalar & a13,
                               const CScalar & a12,
                               const TensorOptions & options = default_tensor_options());
  [[nodiscard]] static R2 fill(const Scalar & a11,
                               const Scalar & a22,
                               const Scalar & a33,
                               const Scalar & a23,
                               const Scalar & a13,
                               const Scalar & a12);

  [[nodiscard]] static R2 skew(const Vec & v);
  [[nodiscard]] static R2 identity(const TensorOptions & options = default_tensor_options());

  R2 rotate(const Rot & r) const;

  R2 rotate(const R2 & R) const;

  R3 drotate(const Rot & r) const;

  R4 drotate(const R2 & R) const;

  Vec row(Size i) const;

  Vec col(Size i) const;

  R2 transpose() const;
};

R2 operator*(const R2 &, const R2 &);
Vec operator*(const R2 &, const Vec &);
 
} // namespace neml2