ceph/src/boost/boost/qvm/quat_access.hpp

   1 #ifndef BOOST_QVM_QUAT_ACCESS_HPP_INCLUDED
   2 #define BOOST_QVM_QUAT_ACCESS_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/inline.hpp>
  10 #include <boost/qvm/quat_traits.hpp>
  11 #include <boost/qvm/deduce_vec.hpp>
  12 #include <boost/qvm/static_assert.hpp>
  13 #include <boost/qvm/enable_if.hpp>
  14
  15 namespace boost { namespace qvm {
  16
  17 namespace
  18 qvm_detail
  19     {
  20     template <class Q>
  21     struct
  22     quat_v_
  23         {
  24         template <class R>
  25         operator R() const
  26             {
  27             R r;
  28             assign(r,*this);
  29             return r;
  30             }
  31
  32         private:
  33
  34         quat_v_( quat_v_ const & );
  35         quat_v_ const & operator=( quat_v_ const & );
  36         ~quat_v_();
  37         };
  38     }
  39
  40 template <class V>
  41 struct vec_traits;
  42
  43 template <class Q>
  44 struct
  45 vec_traits< qvm_detail::quat_v_<Q> >
  46     {
  47     typedef qvm_detail::quat_v_<Q> this_vector;
  48     typedef typename quat_traits<Q>::scalar_type scalar_type;
  49     static int const dim=3;
  50
  51     template <int I>
  52     BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
  53     static
  54     scalar_type
  55     read_element( this_vector const & q )
  56         {
  57         BOOST_QVM_STATIC_ASSERT(I>=0);
  58         BOOST_QVM_STATIC_ASSERT(I<dim);
  59         return quat_traits<Q>::template read_element<I+1>( reinterpret_cast<Q const &>(q) );
  60         }
  61
  62     template <int I>
  63     BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
  64     static
  65     scalar_type &
  66     write_element( this_vector & q )
  67         {
  68         BOOST_QVM_STATIC_ASSERT(I>=0);
  69         BOOST_QVM_STATIC_ASSERT(I<dim);
  70         return quat_traits<Q>::template write_element<I+1>( reinterpret_cast<Q &>(q) );
  71         }
  72     };
  73
  74 template <class Q,int D>
  75 struct
  76 deduce_vec<qvm_detail::quat_v_<Q>,D>
  77     {
  78     typedef vec<typename quat_traits<Q>::scalar_type,D> type;
  79     };
  80
  81 template <class Q,int D>
  82 struct
  83 deduce_vec2<qvm_detail::quat_v_<Q>,qvm_detail::quat_v_<Q>,D>
  84     {
  85     typedef vec<typename quat_traits<Q>::scalar_type,D> type;
  86     };
  87
  88 template <class Q>
  89 BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_TRIVIAL
  90 typename enable_if_c<
  91     is_quat<Q>::value,
  92     qvm_detail::quat_v_<Q> const &>::type
  93 V( Q const & a )
  94     {
  95     return reinterpret_cast<qvm_detail::quat_v_<Q> const &>(a);
  96     }
  97
  98 template <class Q>
  99 BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_TRIVIAL
 100 typename enable_if_c<
 101     is_quat<Q>::value,
 102     qvm_detail::quat_v_<Q> &>::type
 103 V( Q & a )
 104     {
 105     return reinterpret_cast<qvm_detail::quat_v_<Q> &>(a);
 106     }
 107
 108 template <class Q> BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_TRIVIAL typename enable_if_c<is_quat<Q>::value,typename quat_traits<Q>::scalar_type>::type S( Q const & a ) { return quat_traits<Q>::template read_element<0>(a); }
 109 template <class Q> BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_TRIVIAL typename enable_if_c<is_quat<Q>::value,typename quat_traits<Q>::scalar_type>::type X( Q const & a ) { return quat_traits<Q>::template read_element<1>(a); }
 110 template <class Q> BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_TRIVIAL typename enable_if_c<is_quat<Q>::value,typename quat_traits<Q>::scalar_type>::type Y( Q const & a ) { return quat_traits<Q>::template read_element<2>(a); }
 111 template <class Q> BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_TRIVIAL typename enable_if_c<is_quat<Q>::value,typename quat_traits<Q>::scalar_type>::type Z( Q const & a ) { return quat_traits<Q>::template read_element<3>(a); }
 112
 113 template <class Q> BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_TRIVIAL typename enable_if_c<is_quat<Q>::value,typename quat_traits<Q>::scalar_type &>::type S( Q & a ) { return quat_traits<Q>::template write_element<0>(a); }
 114 template <class Q> BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_TRIVIAL typename enable_if_c<is_quat<Q>::value,typename quat_traits<Q>::scalar_type &>::type X( Q & a ) { return quat_traits<Q>::template write_element<1>(a); }
 115 template <class Q> BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_TRIVIAL typename enable_if_c<is_quat<Q>::value,typename quat_traits<Q>::scalar_type &>::type Y( Q & a ) { return quat_traits<Q>::template write_element<2>(a); }
 116 template <class Q> BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_TRIVIAL typename enable_if_c<is_quat<Q>::value,typename quat_traits<Q>::scalar_type &>::type Z( Q & a ) { return quat_traits<Q>::template write_element<3>(a); }
 117
 118 } }
 119
 120 #endif