Added thirdparty: boost library

thirdparty/include/boost/qvm/quat.hpp

@@ -0,0 +1,68 @@
+#ifndef BOOST_QVM_QUAT_HPP_INCLUDED
+#define BOOST_QVM_QUAT_HPP_INCLUDED
+
+// Copyright 2008-2022 Emil Dotchevski and Reverge Studios, Inc.
+
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/qvm/detail/quat_assign.hpp>
+#include <boost/qvm/assert.hpp>
+#include <boost/qvm/static_assert.hpp>
+
+namespace boost { namespace qvm {
+
+template <class T>
+struct
+quat
+    {
+    T a[4];
+    template <class R
+#if __cplusplus >= 201103L
+        , class = typename enable_if<is_quat<R> >::type
+#endif
+    >
+    operator R() const
+        {
+        R r;
+        assign(r,*this);
+        return r;
+        }
+    };
+
+template <class Q>
+struct quat_traits;
+
+template <class T>
+struct
+quat_traits< quat<T> >
+    {
+    typedef quat<T> this_quaternion;
+    typedef T scalar_type;
+
+    template <int I>
+    static
+    BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
+    scalar_type
+    read_element( this_quaternion const & x )
+        {
+        BOOST_QVM_STATIC_ASSERT(I>=0);
+        BOOST_QVM_STATIC_ASSERT(I<4);
+        return x.a[I];
+        }
+
+    template <int I>
+    static
+    BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
+    scalar_type &
+    write_element( this_quaternion & x )
+        {
+        BOOST_QVM_STATIC_ASSERT(I>=0);
+        BOOST_QVM_STATIC_ASSERT(I<4);
+        return x.a[I];
+        }
+    };
+
+} }
+
+#endif