Class Component

src/visualization/components/component.h:40–100

class GameObject;

class Component {
  public:
    Component(const std::shared_ptr<GameObject>& game_object,
              const std::shared_ptr<RenderCanvas>& gl_canvas);

    [[nodiscard]] virtual bool initialize();

    [[nodiscard]] virtual bool buffer_update();

    [[nodiscard]] virtual bool post_buffer_update();

    [[nodiscard]] virtual int render_index() const;

    // Called after all components are initialized
    [[nodiscard]] virtual bool post_initialize();

    virtual void update() = 0;

    virtual void draw(const mat4& projection, const mat4& viewInv) = 0;

    ///
    // Events
    virtual EventProcessCode key_press_event(int /* key_code */) {
        return EventProcessCode::IGNORED;
    }

    virtual void mouse_drag_event(int /* mouse_x */, int /* mouse_y */) {
        // Do nothing
    }

    virtual void mouse_move_event(int /* mouse_x */, int /* mouse_y */) {
        // Do nothing
    }

    virtual ~Component() noexcept;

    [[nodiscard]] std::shared_ptr<GameObject> game_object() const noexcept {
        return game_object_.lock();
    }

    [[nodiscard]] GameObject& game_object_ref() const {
        auto obj = game_object_.lock();
        assert(obj && "GameObject has been destroyed");
        return *obj;
    }

    [[nodiscard]] std::shared_ptr<RenderCanvas> gl_canvas() const noexcept {
        return gl_canvas_.lock();
    }

    [[nodiscard]] RenderCanvas& gl_canvas_ref() const {
        const auto canvas = gl_canvas_.lock();
        assert(canvas && "RenderCanvas has been destroyed");
        return *canvas;
    }

  public:
    std::weak_ptr<GameObject> game_object_;