viewport.hpp

/*
    Viewport.
    Inspired by LibGDX viewport.

    Copyright (C) 2015 Denis BOURGE

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
    USA


    TODO
    > Add more viewport types.
*/

#ifndef HX3D_GRAPHICS_VIEWPORTS_VIEWPORT
#define HX3D_GRAPHICS_VIEWPORTS_VIEWPORT

#include <glm/vec2.hpp>

#include "hx3d/graphics/cameras/camera.hpp"
#include "hx3d/utils/ptr.hpp"

namespace hx3d {
namespace graphics {

namespace viewports {

class Viewport {

public:
  Viewport();
  virtual ~Viewport();

  void setScreenPosition(const float x, const float y);

  void apply(Camera& camera);

  void update(Camera& camera, const int screenWidth, const int screenHeight);

  glm::vec2 screenToWorld(const glm::vec2 screenPoint);

  glm::vec2 getWorldSize();

protected:
  float _worldWidth;
  float _worldHeight;

  int _screenX;
  int _screenY;
  int _screenWidth;
  int _screenHeight;

  virtual void internalUpdate(Camera& camera) = 0;
};

} /* viewports */
} /* graphics */
} /* hx3d */

#endif