ceph/src/boost/boost/qvm/quat.hpp

   1 #ifndef BOOST_QVM_QUAT_HPP_INCLUDED
   2 #define BOOST_QVM_QUAT_HPP_INCLUDED
   3
   4 // Copyright 2008-2022 Emil Dotchevski and Reverge Studios, Inc.
   5
   6 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   7 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   8
   9 #include <boost/qvm/detail/quat_assign.hpp>
  10 #include <boost/qvm/assert.hpp>
  11 #include <boost/qvm/static_assert.hpp>
  12
  13 namespace boost { namespace qvm {
  14
  15 template <class T>
  16 struct
  17 quat
  18     {
  19     T a[4];
  20     template <class R>
  21     operator R() const
  22         {
  23         R r;
  24         assign(r,*this);
  25         return r;
  26         }
  27     };
  28
  29 template <class Q>
  30 struct quat_traits;
  31
  32 template <class T>
  33 struct
  34 quat_traits< quat<T> >
  35     {
  36     typedef quat<T> this_quaternion;
  37     typedef T scalar_type;
  38
  39     template <int I>
  40     static
  41     BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
  42     scalar_type
  43     read_element( this_quaternion const & x )
  44         {
  45         BOOST_QVM_STATIC_ASSERT(I>=0);
  46         BOOST_QVM_STATIC_ASSERT(I<4);
  47         return x.a[I];
  48         }
  49
  50     template <int I>
  51     static
  52     BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
  53     scalar_type &
  54     write_element( this_quaternion & x )
  55         {
  56         BOOST_QVM_STATIC_ASSERT(I>=0);
  57         BOOST_QVM_STATIC_ASSERT(I<4);
  58         return x.a[I];
  59         }
  60     };
  61
  62 } }
  63
  64 #endif