encompass-cs/encompass-cs/Collections/ComponentBitSet.cs

using Encompass.Collections;
using System;
using System.Collections;
using System.Collections.Generic;

namespace Encompass
{
    internal class ComponentBitSet
    {
        Dictionary<Entity, BitSet1024> entities = new Dictionary<Entity, BitSet1024>();
        Dictionary<Type, int> TypeToIndex { get; }

        public ComponentBitSet(Dictionary<Type, int> typeToIndex)
        {
            TypeToIndex = typeToIndex;
        }

        public void FinishRegistering()
        {

        }

        public void Clear()
        {
            entities.Clear();
        }

        public void AddEntity(Entity entity)
        {
            entities.Add(entity, BitSet1024Builder.Zeroes());
        }

        public void Set<TComponent>(Entity entity) where TComponent : struct, IComponent
        {
            if (!entities.ContainsKey(entity)) { AddEntity(entity); }
            entities[entity] = entities[entity].Set(TypeToIndex[typeof(TComponent)]);
        }

        public void RemoveComponent<TComponent>(Entity entity) where TComponent : struct, IComponent
        {
            if (entities.ContainsKey(entity))
            {
                entities[entity] = entities[entity].UnSet(TypeToIndex[typeof(TComponent)]);
            }
        }

        public void RemoveEntity(Entity entity)
        {
            if (entities.ContainsKey(entity))
            {
                entities.Remove(entity);
            }
        }

        public BitSet1024 EntityBitArray(Entity entity)
        {
            return entities.ContainsKey(entity) ? entities[entity] : BitSet1024Builder.Zeroes();
        }
    }
}