nECS

A simple ECS I use in my AxtEngine.

I wanted to try making my own. Once I heard about the idea of an ECS while working on AxtEngine, I really wanted to know how they worked. I think this was a great way to learn.

This is a learning exercise and should not be used in any serious applications.

How to use

All functionality is in namespace axt::ecs

Entities can be referred to as the ecs::Entity class on their own or a ecs::EntityID managed by the scene.

Basic Example

Below is a basic example of:

• Creating an antity
• Attaching a Transform component with a value of 1.f
• Getting a SceneView of all entities with Transforms
• Setting the Transform's x variable to 15
• Deleting the entity

	using namespace axt::ecs;

	struct Transform
	{
		float x;
	};

	Scene sScene{};

	EntityID e1{ sScene.CreateEntity() };

	sScene.Attach<Transform>(e1, { 1.f });

	SceneView<Transform> transformView{ sScene };
	for (EntityID id : transformView)
	{
		Transform& trans{ sScene->GetComponent<Transform>(id) };
		trans.x = 15.f;
	}

	sScene.DestroyEntity(e1);

Future

Thinking of adding:

• (DONE) Attaching components through the Entity itself.