text: /// @ref gtx_normal
  /// @file glm/gtx/normal.inl
  
  namespace glm
  {
  	template <typename T, precision P> 
  	GLM_FUNC_QUALIFIER tvec3<T, P> triangleNormal
  	(
  		tvec3<T, P> const & p1, 
  		tvec3<T, P> const & p2, 
  		tvec3<T, P> const & p3
  	)
  	{
  		return normalize(cross(p1 - p2, p1 - p3));
  	}
  }//namespace glm
  