How to use the ECS

This ECS can be used for any purpose, like creating video games, or mobile applications, ect.

A basic implementation would be:

    int main() {
        Registry reg;
        reg.register_component<Position>();
        Entity e = reg.spawn_entity();
        Position pos = {1, 2};
        reg.add_component<Position>{pos, e};
    }

I will explain line per line how this works:

Registry reg;

Here we create a new Registry object.

reg.register_component<Position>();

We register the Position component in the registry, so that we can add a Position component to our future entities.

Entity e = reg.spawn_entity();

We create a new Entity, made by the Registry, and is also added to every SparseArray already created.

Position pos = {1, 2};

We create a Position component.

reg.add_component<Position>{pos, e};

We set the Position component we created earlier to the Entity.

The position of the Entity can now be retrieved using: reg.get_components<Position>()[e()];