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

   1 //Copyright (c) 2008-2016 Emil Dotchevski and Reverge Studios, Inc.
   2
   3 //Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 //file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #ifndef UUID_49C5A1042AEF11DF9603880056D89593
   7 #define UUID_49C5A1042AEF11DF9603880056D89593
   8
   9 #include <boost/qvm/inline.hpp>
  10 #include <boost/qvm/assert.hpp>
  11 #include <boost/qvm/static_assert.hpp>
  12
  13 namespace
  14 boost
  15     {
  16     namespace
  17     qvm
  18         {
  19         template <class T>
  20         struct
  21         quat
  22             {
  23             T a[4];
  24             template <class R>
  25             operator R() const
  26                 {
  27                 R r;
  28                 assign(r,*this);
  29                 return r;
  30                 }
  31             };
  32
  33         template <class Q>
  34         struct quat_traits;
  35
  36         template <class T>
  37         struct
  38         quat_traits< quat<T> >
  39             {
  40             typedef quat<T> this_quaternion;
  41             typedef T scalar_type;
  42
  43             template <int I>
  44             static
  45             BOOST_QVM_INLINE_CRITICAL
  46             scalar_type
  47             read_element( this_quaternion const & x )
  48                 {
  49                 BOOST_QVM_STATIC_ASSERT(I>=0);
  50                 BOOST_QVM_STATIC_ASSERT(I<4);
  51                 return x.a[I];
  52                 }
  53
  54             template <int I>
  55             static
  56             BOOST_QVM_INLINE_CRITICAL
  57             scalar_type &
  58             write_element( this_quaternion & x )
  59                 {
  60                 BOOST_QVM_STATIC_ASSERT(I>=0);
  61                 BOOST_QVM_STATIC_ASSERT(I<4);
  62                 return x.a[I];
  63                 }
  64             };
  65         }
  66     }
  67
  68 #endif