text: /*
   * Gamedev Framework (gf)
   * Copyright (C) 2016-2019 Julien Bernard
   *
   * This software is provided 'as-is', without any express or implied
   * warranty.  In no event will the authors be held liable for any damages
   * arising from the use of this software.
   *
   * Permission is granted to anyone to use this software for any purpose,
   * including commercial applications, and to alter it and redistribute it
   * freely, subject to the following restrictions:
   *
   * 1. The origin of this software must not be misrepresented; you must not
   *    claim that you wrote the original software. If you use this software
   *    in a product, an acknowledgment in the product documentation would be
   *    appreciated but is not required.
   * 2. Altered source versions must be plainly marked as such, and must not be
   *    misrepresented as being the original software.
   * 3. This notice may not be removed or altered from any source distribution.
   */
  #ifndef GF_MODELS_H
  #define GF_MODELS_H
  
  #include "Model.h"
  #include "Portability.h"
  
  namespace gf {
  #ifndef DOXYGEN_SHOULD_SKIP_THIS
  inline namespace v1 {
  #endif
  
    /**
     * @ingroup game
     * @brief Fixed timestep model
     *
     * This model takes another model that needs a fixed timestep and provides
     * it event if the original timestep is not fixed. This may be useful for
     * physics model, for example.
     */
    class GF_API FixedTimestepModel : public Model {
    public:
      /**
       * @brief Constructor
       *
       * @param model The original model
       * @param timestep The fixed timestep
       */
      FixedTimestepModel(Model& model, Time timestep = gf::seconds(1 / 60.0f));
  
      virtual void update(Time time) override;
  
    private:
      Model& m_model;
      Time m_timestep;
      Time m_elapsed;
    };
  
  #ifndef DOXYGEN_SHOULD_SKIP_THIS
  }
  #endif
  }
  
  
  #endif // GF_MODELS_H
  