dust3d/thirdparty/cgal/CGAL-5.1/include/CGAL/Classification/compressed_float.h

// Copyright (c) 2018 GeometryFactory Sarl (France).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org).
//
// $URL: https://github.com/CGAL/cgal/blob/v5.1/Classification/include/CGAL/Classification/compressed_float.h $
// $Id: compressed_float.h e9d41d7 2020-04-21T10:03:00+02:00 Maxime Gimeno
// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
//
// Author(s)     : Simon Giraudot

#ifndef CGAL_CLASSIFICATION_COMPRESSED_FLOAT_H
#define CGAL_CLASSIFICATION_COMPRESSED_FLOAT_H

#include <CGAL/license/Classification.h>

namespace CGAL {
namespace Classification {

/// \cond SKIP_IN_MANUAL

#if defined(CGAL_CLASSIFICATION_DO_NOT_COMPRESS_FLOATS)
typedef float compressed_float;

inline float compress_float (const float& f, const float&, const float&)
{
  return f;
}

inline float decompress_float<float> (const float& t, const float&, const float&)
{
  return t;
}

#else

#  if defined(CGAL_CLASSIFICATION_COMPRESS_FLOATS_WITH_USHORT)
typedef unsigned short compressed_float;
#  else // Default = compress with unsigned char
typedef unsigned char compressed_float;
#  endif

inline compressed_float compress_float (const float& f, const float& fmin = 0.f, const float& fmax = 1.f)
{
  return static_cast<compressed_float>
    (float((std::numeric_limits<compressed_float>::max)()) * (f - fmin) / (fmax - fmin));
}

inline float decompress_float (const compressed_float& t, const float& fmin = 0.f, const float& fmax = 1.f)
{
  return ((fmax - fmin) * (t / float((std::numeric_limits<compressed_float>::max)())) + fmin);
}

#endif


  /// \endcond

} // namespace Classification
} // namespace CGAL



#endif // CGAL_CLASSIFICATION_COMPRESSED_FLOAT_H