Layer System

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Layer System

The Layer system is the primary abstraction for organizing application logic in Nodens. Every piece of update logic, rendering, or event handling lives inside a Layer.

Overview

Layer Lifecycle

Layer vs. Overlay

The LayerStack

Creating Your Own Layer

// MyLayer.cppm
export module MyApp.MyLayer;

import Nodens;

export class MyLayer : public Nodens::Layer {
public:
    MyLayer() : Layer("MyLayer") {}

    void OnAttach() override { /* initialization */ }
    void OnDetach() override { /* cleanup */ }
    void OnUpdate(Nodens::TimeStep ts) override { /* per-frame logic */ }
    void OnImGuiRender(Nodens::TimeStep ts) override { /* ImGui drawing */ }
    void OnEvent(Nodens::Event& event) override { /* event handling */ }
};

See Also

• Architecture Overview — Where layers fit in the overall system.
• Creating a Custom Layer — Full step-by-step tutorial.
• Event System — How events reach layers.
• Layer and LayerStack in the API Reference.