text: ///////////////////////////////////////////////////////////////////////////////
  // This source file is part of Hect.
  //
  // Copyright (c) 2014 Colin Hill
  //
  // 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.
  ///////////////////////////////////////////////////////////////////////////////
  #pragma once
  
  namespace hect
  {
  
  ///
  /// A sphere.
  template <typename T = double>
  class Sphere
  {
  public:
  
      ///
      /// Constructs a sphere with a radius of one.
      Sphere();
  
      ///
      /// Constructs a sphere given its radius
      ///
      /// \param radius The radius of the sphere.
      Sphere(T radius);
  
      ///
      /// Returns the radius.
      T radius() const;
  
      ///
      /// Sets the radius.
      ///
      /// \param radius The new radius.
      void setRadius(T radius);
  
  private:
      T _radius;
  };
  
  }
  
  #include "Sphere.inl"