1: Application Creation and Game Loop: Create Application like this Application app; ApplicationConfig config = {}; app.Init(config); app.Run();
Application::Init and Application::Run functions return true and false on success and failure respectively check for the returns and exit with a log and failure status if(!app.Init(config)) 'failed to init app with config %', config; if(!app.Run()) 'failed to run app';
Jin uses Layers as wrappers over loops Create a Layer by inheriting from base Layer class the Start, Update and End function needs to be overriden with your own implementation virtual void Start() override virtual void Update() override virtual void End() override these functions should be self explaning Start and End are executed once and Update is looped untill the applicatin is open a sample Layer would look like this class MainLayer: public Layer { public: MainLayer() : Layer("main_layer") {} virtual void Start() override {} virtual void Update() override {} virtual void End() override {} };
add the layer to the app before running the app app.AddLayer(new MainLayer()); app.Run(); the layer is then released internally when app is closed so this is not a memory leak
2: Renderer and Cameras Jin has a good implementation of a 2d batch renderer that can draw textured quads. To Draw a single quad you need to start a batch, draw, end and flush the batch BatchRenderer2D::Begin(); BatchRenderer2D::DrawQuad(position, size, color); BatchRenderer2D::End(); BatchRenderer2D::Flush(); the app takes care of the buffer swapping internally and vsync can be configured through ApplicationConfiguration struct the renderer needs to initialized in the Layers Start function this may change in future versions of Jin virtual void Start() override { BatchRenderer2DConfig config = {}; BatchRenderer2D::Init(config); }