esengine/source/src/ECS/Utils/Matcher.ts

class Matcher{
    protected allSet = new BitSet();
    protected exclusionSet = new BitSet();
    protected oneSet = new BitSet();

    public static empty(){
        return new Matcher();
    }

    public getAllSet(){
        return this.allSet;
    }

    public getExclusionSet(){
        return this.exclusionSet;
    }

    public getOneSet(){
        return this.oneSet;
    }

    public IsIntersted(e: Entity){
        if (!this.allSet.isEmpty()){
            for (let i = this.allSet.nextSetBit(0); i >= 0; i = this.allSet.nextSetBit(i + 1)){
                if (!e.componentBits.get(i))
                    return false;
            }
        }

        if (!this.exclusionSet.isEmpty() && this.exclusionSet.intersects(e.componentBits))
            return false;

        if (!this.oneSet.isEmpty() && !this.oneSet.intersects(e.componentBits))
            return false;

        return true;
    }

    public all(...types: any[]): Matcher{
        types.forEach(type => {
            this.allSet.set(ComponentTypeManager.getIndexFor(type));
        });

        return this;
    }

    public exclude(...types: any[]){
        types.forEach(type => {
            this.exclusionSet.set(ComponentTypeManager.getIndexFor(type));
        });

        return this;
    }

    public one(...types: any[]){
        types.forEach(type => {
            this.oneSet.set(ComponentTypeManager.getIndexFor(type));
        });

        return this;
    }
}