cpp-game-engine/engine/include/game/engine/entity.hpp

//
//  entity.hpp
//  engine
//
//  Created by Sam Jaffe on 5/20/19.
//  Copyright © 2019 Sam Jaffe. All rights reserved.
//

#pragma once

#include <json/forwards.h>

#include "game/engine/engine_fwd.hpp"
#include "game/graphics/graphics_fwd.h"
#include "game/graphics/object.hpp"
#include "game/util/identity.hpp"

namespace engine {
  class collidable : identity<collidable> {
  public:
    collidable(graphics::object const & obj);
    collidable(Json::Value const & json, graphics::manager const & mgr);

    virtual void collide(collidable const &) {}
    graphics::object const & render_info() const { return render_info_; }

  protected:
    // A mix of position and graphics info
    graphics::object render_info_;
  };

  class entity : public collidable {
  public:
    // TODO: Extract this out?
    entity(Json::Value const & json, graphics::manager const & mgr);
    void update(float delta);

  private:
    // The scene that owns this object
    std::weak_ptr<scene> in_scene;

    // Position info
    math::vec2 last_position{{-1, -1}};
    math::vec2 velocity;
    math::vec2 acceleration{{0, 0}};
    float angular_velocity{0.f};
    // Graphics info
    std::size_t frame_index{0};
    std::vector<math::vec2> frame_texture_coords;

    float scale{1.f};

    collision_t collides_with;
    collision_t collides_as;
  };
}