56 lines
2.0 KiB
C#
56 lines
2.0 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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namespace Encompass
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{
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public class Entity
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{
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public readonly static List<Component> Empty = new List<Component>();
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public readonly int id;
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private readonly Dictionary<Type, List<Component>> componentBag = new Dictionary<Type, List<Component>>();
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private readonly Dictionary<Type, List<Component>> activeComponents = new Dictionary<Type, List<Component>>();
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public Entity(int id) {
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this.id = id;
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}
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public TComponent AddComponent<TComponent>() where TComponent : Component, new() {
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TComponent component = new TComponent();
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if (!componentBag.ContainsKey(typeof(TComponent))) {
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var componentList = new List<Component>();
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var activeComponentList = new List<Component>();
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componentBag.Add(typeof(TComponent), componentList);
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activeComponents.Add(typeof(TComponent), activeComponentList);
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componentList.Add(component);
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activeComponentList.Add(component);
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} else {
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componentBag[typeof(TComponent)].Add(component);
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activeComponents[typeof(TComponent)].Add(component);
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}
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return component;
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}
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public IEnumerable<TComponent> GetComponents<TComponent>() where TComponent : Component {
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if (activeComponents.ContainsKey(typeof(TComponent))) {
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return activeComponents[typeof(TComponent)].Cast<TComponent>();
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} else {
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return Enumerable.Empty<TComponent>();
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}
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}
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public TComponent GetComponent<TComponent>() where TComponent : Component {
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return GetComponents<TComponent>().First();
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}
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public bool HasComponent<TComponent>() where TComponent : Component {
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return activeComponents.ContainsKey(typeof(TComponent)) &&
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activeComponents[typeof(TComponent)].Count != 0;
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}
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}
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}
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