Quaternion.h

// Copyright 2024, 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/PrimitiveTensor.h"
 
namespace neml2
{
class R2;
class Scalar;
class Rot;

class Quaternion : public PrimitiveTensor<Quaternion, 4>
{
public:
  using PrimitiveTensor<Quaternion, 4>::PrimitiveTensor;
 
  Quaternion(const Rot & r);

  R2 rotation_matrix() const;

  Scalar dist(const Quaternion & other) const;
};
} // namespace neml2