About

Extension for LeoECS Lite for a LeoECS Classic-style filters.

Actually, that's almost the same as extendedfilters

How to use

Setup

EcsSystems ecsSystems = ...;
...
ecsSystems.Add(new MySystem1())
    
// should be invoked after systems registration, but before Init invocation
ecsSystems.InitXLiteFilters();

ecsSystems.Init();

Filters

Do not define pools to access components from filter

    // injected as in classic
    private TypedFilter<A, B> _anb = default;

    public void Run(EcsSystems systems)
    {
        foreach (int entity in _anb)
        {
            // as in ecs-classic
            ref A a = ref _anb.Get1(entity);
            ref B b = ref _anb.Get2(entity);
        }
    }

Pool sets

Do not define each individual pool to access components outside of filter

    private TypedFilter<A, B> _ab;

    // PoolSet is just a shorthand for several pool definitions. 
    // This definition gives access for pools of C and D components (up to 8 components)
    // injected as in classic too
    private PoolSet<C, D> _cd;

    public void Run(EcsSystems systems)
    {
        // iterate over entities with A and B components
        foreach (int entity in _ab)
        {
            // check if C component is also present and add it if it's not present (positional access as in ecs-classic)
            if (!_cd.Has1(entity))
            {
                _cd.Add1(entity).value = 17;
            }
            // the same for D component
            if (!_cd.Has2(entity))
            {
                _cd.Add2(entity).h = 17;
            }
        }
    }

Multi-world

use attribute to specify world name. attribute is optional - default world used if it's absent. Note that worlds should still be configured as described in ecs-lite docs.

[WorldName("extraWorld")]
private TypedFilter<A, B> _anb;

[WorldName("extraWorld")]
private PoolSet<C, D> _cnd;

// Yes, EcsWorld is injected too
[WorldName("extraWorld")]
private EcsWorld _cnd;

Plans

Exclusion filter constraints.