text: ///////////////////////////////////////////////////////////////////////////////////
  /// OpenGL Mathematics (glm.g-truc.net)
  ///
  /// Copyright (c) 2005 - 2014 G-Truc Creation (www.g-truc.net)
  /// Permission is hereby granted, free of charge, to any person obtaining a copy
  /// of this software and associated documentation files (the "Software"), to deal
  /// in the Software without restriction, including without limitation the rights
  /// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  /// copies of the Software, and to permit persons to whom the Software is
  /// furnished to do so, subject to the following conditions:
  /// 
  /// The above copyright notice and this permission notice shall be included in
  /// all copies or substantial portions of the Software.
  /// 
  /// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  /// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  /// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  /// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  /// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  /// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  /// THE SOFTWARE.
  ///
  /// @ref core
  /// @file glm/core/func_packing.inl
  /// @date 2010-03-17 / 2011-06-15
  /// @author Christophe Riccio
  ///////////////////////////////////////////////////////////////////////////////////
  
  #include "func_common.hpp"
  #include "type_half.hpp"
  #include "../fwd.hpp"
  
  namespace glm
  {
  	GLM_FUNC_QUALIFIER uint packUnorm2x16(vec2 const & v)
  	{
  		u16vec2 Topack(round(clamp(v, 0.0f, 1.0f) * 65535.0f));
  		// return reinterpret_cast<uint&>(Topack);
      uint* ptr(reinterpret_cast<uint*>(&Topack));
      return *ptr;
  	}
  
  	GLM_FUNC_QUALIFIER vec2 unpackUnorm2x16(uint const & p)
  	{
  		vec2 Unpack(reinterpret_cast<u16vec2 const &>(p));
  		return Unpack * float(1.5259021896696421759365224689097e-5); // 1.0 / 65535.0
  	}
  
  	GLM_FUNC_QUALIFIER uint packSnorm2x16(vec2 const & v)
  	{
  		i16vec2 Topack(round(clamp(v ,-1.0f, 1.0f) * 32767.0f));
  		// return reinterpret_cast<uint32&>(Topack);
      uint* ptr(reinterpret_cast<uint*>(&Topack));
      return *ptr;
  	}
  
  	GLM_FUNC_QUALIFIER vec2 unpackSnorm2x16(uint const & p)
  	{
  		vec2 Unpack(reinterpret_cast<i16vec2 const &>(p));
  		return clamp(
  			Unpack * 3.0518509475997192297128208258309e-5f, //1.0f / 32767.0f,
  			-1.0f, 1.0f);
  	}
  
  	GLM_FUNC_QUALIFIER uint packUnorm4x8(vec4 const & v)
  	{
  		u8vec4 Topack(round(clamp(v, 0.0f, 1.0f) * 255.0f));
  		return reinterpret_cast<uint&>(Topack);
  	}
  
  	GLM_FUNC_QUALIFIER vec4 unpackUnorm4x8(uint const & p)
  	{
  		vec4 Unpack(reinterpret_cast<u8vec4 const&>(p));
  		return Unpack * float(0.0039215686274509803921568627451); // 1 / 255
  	}
  	
  	GLM_FUNC_QUALIFIER uint packSnorm4x8(vec4 const & v)
  	{
  		i8vec4 Topack(round(clamp(v ,-1.0f, 1.0f) * 127.0f));
  		return reinterpret_cast<uint&>(Topack);
  	}
  	
  	GLM_FUNC_QUALIFIER glm::vec4 unpackSnorm4x8(uint const & p)
  	{
  		vec4 Unpack(reinterpret_cast<i8vec4 const &>(p));
  		return clamp(
  			Unpack * 0.0078740157480315f, // 1.0f / 127.0f
  			-1.0f, 1.0f);
  	}
  
  	GLM_FUNC_QUALIFIER double packDouble2x32(uvec2 const & v)
  	{
  		return reinterpret_cast<double const &>(v);
  	}
  
  	GLM_FUNC_QUALIFIER uvec2 unpackDouble2x32(double const & v)
  	{
  		return reinterpret_cast<uvec2 const &>(v);
  	}
  
  	GLM_FUNC_QUALIFIER uint packHalf2x16(vec2 const & v)
  	{
  		i16vec2 Unpack(
  			detail::toFloat16(v.x),
  			detail::toFloat16(v.y));
  
  		uint * Result = reinterpret_cast<uint*>(&Unpack);
  		return *Result;
  	}
  
  	GLM_FUNC_QUALIFIER vec2 unpackHalf2x16(uint const & v)
  	{
  		i16vec2 Unpack(reinterpret_cast<i16vec2 const &>(v));
  	
  		return vec2(
  			detail::toFloat32(Unpack.x), 
  			detail::toFloat32(Unpack.y));
  	}
  }//namespace glm
  
  