MathReal2x2.h

// -*- tab-width: 2; indent-tabs-mode: nil; coding: utf-8-with-signature -*-
//-----------------------------------------------------------------------------
// Copyright 2000-2026 CEA (www.cea.fr) IFPEN (www.ifpenergiesnouvelles.com)
// See the top-level COPYRIGHT file for details.
// SPDX-License-Identifier: Apache-2.0
//-----------------------------------------------------------------------------
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/* MathReal2x2.h                                               (C) 2000-2026 */
/*                                                                           */
/* Mathematical operations on Real2x2.                                       */
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#ifndef ARCCORE_BASE_MATHREAL2X2_H
#define ARCCORE_BASE_MATHREAL2X2_H
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#include "arccore/base/Real2x2.h"
#include "arccore/base/MathReal2.h"
 
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namespace Arcane::math
{
/*!
 * \brief Compares the matrix with the zero matrix.
 *
 * The matrix is zero if and only if each of its components
 * is less than a given epsilon. The epsilon value used is that
 * of float_info<value_type>::nearlyEpsilon():
 * \f[A=0 \Leftrightarrow |A.x|<\epsilon,|A.y|<\epsilon\f]
 *
 * \retval true if the matrix is equal to the zero matrix,
 * \retval false otherwise.
 */
constexpr ARCCORE_HOST_DEVICE bool isNearlyZero(const Real2x2& v)
{
  return math::isNearlyZero(v.x) && math::isNearlyZero(v.y);
}
 
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} // namespace Arcane::math
 
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namespace Arcane
{
 
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inline constexpr ARCCORE_HOST_DEVICE bool Real2x2::
isNearlyZero() const
{
  return math::isNearlyZero(*this);
}
 
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} // namespace Arcane
 
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#endif