snapshot and restore relations
parent
4d40103a6f
commit
9032eff699
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@ -7,7 +7,7 @@ namespace MoonTools.ECS.Rev2
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{
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public static ArchetypeSignature Empty = new ArchetypeSignature(0);
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List<ulong> Ids;
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List<uint> Ids;
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public int Count => Ids.Count;
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@ -15,12 +15,12 @@ namespace MoonTools.ECS.Rev2
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public ArchetypeSignature()
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{
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Ids = new List<ulong>();
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Ids = new List<uint>();
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}
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public ArchetypeSignature(int capacity)
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{
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Ids = new List<ulong>(capacity);
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Ids = new List<uint>(capacity);
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}
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// Maintains sorted order
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@ -10,7 +10,7 @@ namespace MoonTools.ECS.Rev2
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public int Count;
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private int Capacity;
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private readonly int ElementSize;
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public readonly int ElementSize;
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private bool IsDisposed;
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@ -23,6 +23,11 @@ namespace MoonTools.ECS.Rev2
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Elements = (nint) NativeMemory.Alloc((nuint) (ElementSize * Capacity));
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}
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public Span<T> ToSpan<T>()
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{
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return new Span<T>((void*) Elements, Count);
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public ref T Get<T>(int i) where T : unmanaged
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{
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@ -24,13 +24,15 @@ namespace MoonTools.ECS.Rev2
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public FilterBuilder Include<T>() where T : unmanaged
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{
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Included.Add(World.TypeToComponentId[typeof(T)]);
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World.TryRegisterTypeId<T>();
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Included.Add(World.TypeToId[typeof(T)]);
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return new FilterBuilder(World, Included, Excluded);
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}
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public FilterBuilder Exclude<T>() where T : unmanaged
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{
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Excluded.Add(World.TypeToComponentId[typeof(T)]);
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World.TryRegisterTypeId<T>();
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Excluded.Add(World.TypeToId[typeof(T)]);
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return new FilterBuilder(World, Included, Excluded);
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}
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@ -2,27 +2,8 @@
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namespace MoonTools.ECS.Rev2;
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public readonly record struct Id : IComparable<Id>
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public readonly record struct Id(uint Value) : IComparable<Id>
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{
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public readonly ulong Value;
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private const ulong HI = 0xFFFFFFFF00000000;
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private const ulong LO = 0xFFFFFFFF;
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public bool IsPair => (HI & Value) != 0;
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public uint Low => (uint)(LO & Value);
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public uint High => (uint)((HI & Value) >>> 32);
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public Id(ulong value)
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{
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Value = value;
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}
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public Id(uint relation, uint target)
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{
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Value = (relation << 31) | target;
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}
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public int CompareTo(Id other)
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{
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return Value.CompareTo(other.Value);
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@ -4,8 +4,8 @@ namespace MoonTools.ECS.Rev2;
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internal class IdAssigner
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{
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ulong Next;
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NativeArray<ulong> AvailableIds = new NativeArray<ulong>();
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uint Next;
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NativeArray<uint> AvailableIds = new NativeArray<uint>();
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public Id Assign()
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{
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@ -5,28 +5,27 @@ using MoonTools.ECS.Collections;
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namespace MoonTools.ECS.Rev2;
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internal class Relation
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// TODO: implement this entire class with NativeMemory equivalents, can just memcpy for snapshots
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internal class RelationStorage
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{
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private int count = 0;
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private int capacity = 16;
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private Column relations;
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private Column relationDatas;
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private Dictionary<(Id, Id), int> indices = new Dictionary<(Id, Id), int>(16);
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private Dictionary<Id, IndexableSet<Id>> outRelations = new Dictionary<Id, IndexableSet<Id>>(16);
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private Dictionary<Id, IndexableSet<Id>> inRelations = new Dictionary<Id, IndexableSet<Id>>(16);
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internal Column relations;
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internal Column relationDatas;
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internal Dictionary<(Id, Id), int> indices = new Dictionary<(Id, Id), int>(16);
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internal Dictionary<Id, IndexableSet<Id>> outRelations = new Dictionary<Id, IndexableSet<Id>>(16);
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internal Dictionary<Id, IndexableSet<Id>> inRelations = new Dictionary<Id, IndexableSet<Id>>(16);
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private Stack<IndexableSet<Id>> listPool = new Stack<IndexableSet<Id>>();
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private bool disposed;
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public Relation(int relationDataSize)
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public RelationStorage(int relationDataSize)
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{
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relations = new Column(Unsafe.SizeOf<(Id, Id)>());
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relationDatas = new Column(relationDataSize);
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}
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public unsafe ReverseSpanEnumerator<(Id, Id)> All()
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public ReverseSpanEnumerator<(Id, Id)> All()
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{
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return new ReverseSpanEnumerator<(Id, Id)>(new Span<(Id, Id)>((void*) relations.Elements, count));
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return new ReverseSpanEnumerator<(Id, Id)>(relations.ToSpan<(Id, Id)>());
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}
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public unsafe void Set<T>(in Id entityA, in Id entityB, in T relationData) where T : unmanaged
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@ -51,16 +50,9 @@ internal class Relation
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}
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inRelations[entityB].Add(entityA);
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if (count >= capacity)
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{
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relations.Resize();
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relationDatas.Resize();
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}
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(((Id, Id)*) relationDatas.Elements)[count] = relation;
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((T*) relationDatas.Elements)[count] = relationData;
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indices.Add(relation, count);
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count += 1;
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relations.Append(relation);
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relationDatas.Append(relationData);
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indices.Add(relation, relations.Count - 1);
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}
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public ref T Get<T>(in Id entityA, in Id entityB) where T : unmanaged
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@ -69,9 +61,9 @@ internal class Relation
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return ref relationDatas.Get<T>(relationIndex);
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}
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public bool Has((Id, Id) relation)
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public bool Has(Id entityA, Id entityB)
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{
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return indices.ContainsKey(relation);
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return indices.ContainsKey((entityA, entityB));
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}
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public ReverseSpanEnumerator<Id> OutRelations(Id entityID)
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@ -177,11 +169,11 @@ internal class Relation
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if (indices.TryGetValue(relation, out var index))
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{
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var lastElementIndex = relations.Count - 1;
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relationDatas.Delete(index);
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relations.Delete(index);
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var lastElementIndex = count - 1;
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// move an element into the hole
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if (index != lastElementIndex)
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{
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@ -189,14 +181,38 @@ internal class Relation
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indices[lastRelation] = index;
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}
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count -= 1;
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indices.Remove(relation);
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}
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return (aEmpty, bEmpty);
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}
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private IndexableSet<Id> AcquireHashSetFromPool()
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public void RemoveEntity(Id entity)
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{
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if (outRelations.TryGetValue(entity, out var entityOutRelations))
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{
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foreach (var entityB in entityOutRelations)
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{
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Remove(entity, entityB);
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}
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ReturnHashSetToPool(entityOutRelations);
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outRelations.Remove(entity);
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}
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if (inRelations.TryGetValue(entity, out var entityInRelations))
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{
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foreach (var entityA in entityInRelations)
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{
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Remove(entityA, entity);
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}
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ReturnHashSetToPool(entityInRelations);
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inRelations.Remove(entity);
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}
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}
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internal IndexableSet<Id> AcquireHashSetFromPool()
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{
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if (listPool.Count == 0)
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{
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@ -214,7 +230,6 @@ internal class Relation
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public void Clear()
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{
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count = 0;
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indices.Clear();
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foreach (var set in inRelations.Values)
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ReturnHashSetToPool(set);
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}
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outRelations.Clear();
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relations.Count = 0;
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relationDatas.Count = 0;
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}
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protected virtual void Dispose(bool disposing)
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@ -1,4 +1,5 @@
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using System.Collections.Generic;
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using System.Runtime.CompilerServices;
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using MoonTools.ECS.Collections;
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namespace MoonTools.ECS.Rev2;
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@ -8,7 +9,14 @@ public class Snapshot
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private Dictionary<ArchetypeSignature, ArchetypeSnapshot> ArchetypeSnapshots =
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new Dictionary<ArchetypeSignature, ArchetypeSnapshot>();
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private Dictionary<Id, RelationSnapshot> RelationSnapshots =
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new Dictionary<Id, RelationSnapshot>();
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private Dictionary<Id, Record> EntityIndex = new Dictionary<Id, Record>();
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private Dictionary<Id, IndexableSet<Id>> EntityRelationIndex =
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new Dictionary<Id, IndexableSet<Id>>();
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private IdAssigner IdAssigner = new IdAssigner();
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public int Count
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foreach (var (archetypeSignature, archetypeSnapshot) in ArchetypeSnapshots)
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{
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var archetype = world.ArchetypeIndex[archetypeSignature];
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RestoreArchetypeSnapshot(archetype);
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archetypeSnapshot.Restore(archetype);
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}
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// restore entity index
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// restore id assigner state
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IdAssigner.CopyTo(world.IdAssigner);
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// restore relation state
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foreach (var (typeId, relationSnapshot) in RelationSnapshots)
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{
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var relationStorage = world.RelationIndex[typeId];
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relationSnapshot.Restore(relationStorage);
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}
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// restore entity relation index state
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// FIXME: arghhhh this is so slow
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foreach (var (id, relationTypeSet) in EntityRelationIndex)
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{
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world.EntityRelationIndex[id].Clear();
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foreach (var typeId in relationTypeSet)
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{
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world.EntityRelationIndex[id].Add(typeId);
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}
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}
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}
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public void Take(World world)
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@ -63,9 +90,32 @@ public class Snapshot
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{
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TakeArchetypeSnapshot(archetype);
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}
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// copy relations
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foreach (var (typeId, relationStorage) in world.RelationIndex)
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{
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TakeRelationSnapshot(typeId, relationStorage);
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}
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// copy entity relation index
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// FIXME: arghhhh this is so slow
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foreach (var (id, relationTypeSet) in world.EntityRelationIndex)
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{
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if (!EntityRelationIndex.ContainsKey(id))
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{
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EntityRelationIndex.Add(id, new IndexableSet<Id>());
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}
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EntityRelationIndex[id].Clear();
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foreach (var typeId in relationTypeSet)
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{
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EntityRelationIndex[id].Add(typeId);
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}
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}
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}
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internal void TakeArchetypeSnapshot(Archetype archetype)
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private void TakeArchetypeSnapshot(Archetype archetype)
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{
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if (!ArchetypeSnapshots.TryGetValue(archetype.Signature, out var archetypeSnapshot))
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{
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archetypeSnapshot.Take(archetype);
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}
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private void RestoreArchetypeSnapshot(Archetype archetype)
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private void TakeRelationSnapshot(Id typeId, RelationStorage relationStorage)
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{
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var archetypeSnapshot = ArchetypeSnapshots[archetype.Signature];
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archetypeSnapshot.Restore(archetype);
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if (!RelationSnapshots.TryGetValue(typeId, out var snapshot))
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{
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snapshot = new RelationSnapshot(World.ElementSizes[typeId]);
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RelationSnapshots.Add(typeId, snapshot);
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}
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snapshot.Take(relationStorage);
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}
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private class ArchetypeSnapshot
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{
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public ArchetypeSignature Signature;
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private readonly Column[] ComponentColumns;
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private readonly NativeArray<Id> RowToEntity;
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public ArchetypeSnapshot(ArchetypeSignature signature)
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{
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Signature = signature;
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ComponentColumns = new Column[signature.Count];
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RowToEntity = new NativeArray<Id>();
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@ -103,11 +156,6 @@ public class Snapshot
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}
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}
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public void Clear()
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{
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RowToEntity.Clear();
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}
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public void Take(Archetype archetype)
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{
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for (int i = 0; i < ComponentColumns.Length; i += 1)
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RowToEntity.CopyTo(archetype.RowToEntity);
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}
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}
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private class RelationSnapshot
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{
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private Column Relations;
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private Column RelationDatas;
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public RelationSnapshot(int elementSize)
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{
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Relations = new Column(Unsafe.SizeOf<(Id, Id)>());
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RelationDatas = new Column(elementSize);
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}
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public void Take(RelationStorage relationStorage)
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{
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relationStorage.relations.CopyAllTo(Relations);
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relationStorage.relationDatas.CopyAllTo(RelationDatas);
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}
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public void Restore(RelationStorage relationStorage)
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{
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relationStorage.Clear();
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Relations.CopyAllTo(relationStorage.relations);
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RelationDatas.CopyAllTo(relationStorage.relationDatas);
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for (int index = 0; index < Relations.Count; index += 1)
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{
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var relation = Relations.Get<(Id, Id)>(index);
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relationStorage.indices[relation] = index;
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relationStorage.indices[relation] = index;
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if (!relationStorage.outRelations.ContainsKey(relation.Item1))
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{
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relationStorage.outRelations[relation.Item1] =
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relationStorage.AcquireHashSetFromPool();
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}
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relationStorage.outRelations[relation.Item1].Add(relation.Item2);
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if (!relationStorage.inRelations.ContainsKey(relation.Item2))
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{
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relationStorage.inRelations[relation.Item2] =
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relationStorage.AcquireHashSetFromPool();
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}
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relationStorage.inRelations[relation.Item2].Add(relation.Item1);
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}
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}
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}
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}
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@ -1,13 +1,15 @@
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using System;
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using System.Collections.Generic;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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using MoonTools.ECS.Collections;
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namespace MoonTools.ECS.Rev2
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{
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public class World : IDisposable
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{
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// Get ComponentId from a Type
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internal static Dictionary<Type, Id> TypeToComponentId = new Dictionary<Type, Id>();
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internal static Dictionary<Type, Id> TypeToId = new Dictionary<Type, Id>();
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// Get element size from a ComponentId
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internal static Dictionary<Id, int> ElementSizes = new Dictionary<Id, int>();
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@ -20,7 +22,16 @@ namespace MoonTools.ECS.Rev2
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// Going from ComponentId to Archetype list
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Dictionary<Id, List<Archetype>> ComponentIndex = new Dictionary<Id, List<Archetype>>();
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// Relation Storages
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internal Dictionary<Id, RelationStorage> RelationIndex =
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new Dictionary<Id, RelationStorage>();
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// Entity Relation Tracking
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internal Dictionary<Id, IndexableSet<Id>> EntityRelationIndex =
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new Dictionary<Id, IndexableSet<Id>>();
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// ID Management
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// FIXME: Entity and Type Ids should be separated
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internal IdAssigner IdAssigner = new IdAssigner();
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internal readonly Archetype EmptyArchetype;
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@ -59,58 +70,66 @@ namespace MoonTools.ECS.Rev2
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var entityId = IdAssigner.Assign();
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EntityIndex.Add(entityId, new Record(EmptyArchetype, EmptyArchetype.Count));
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EmptyArchetype.RowToEntity.Add(entityId);
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if (!EntityRelationIndex.ContainsKey(entityId))
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{
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EntityRelationIndex.Add(entityId, new IndexableSet<Id>());
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}
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return entityId;
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}
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// used as a fast path by snapshot restore
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internal void CreateEntityOnArchetype(Archetype archetype)
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internal void TryRegisterTypeId<T>() where T : unmanaged
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{
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var entityId = IdAssigner.Assign();
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archetype.RowToEntity.Add(entityId);
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}
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// used as a fast path by Archetype.ClearAll and snapshot restore
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internal void FreeEntity(Id entityId)
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{
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EntityIndex.Remove(entityId);
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IdAssigner.Unassign(entityId);
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}
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private void RegisterTypeId(Id typeId, int elementSize)
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{
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ComponentIndex.Add(typeId, new List<Archetype>());
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ElementSizes.Add(typeId, elementSize);
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if (!TypeToId.ContainsKey(typeof(T)))
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{
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var typeId = IdAssigner.Assign();
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TypeToId.Add(typeof(T), typeId);
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ElementSizes.Add(typeId, Unsafe.SizeOf<T>());
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}
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}
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// FIXME: would be much more efficient to do all this at load time somehow
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private void RegisterComponent<T>() where T : unmanaged
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private void RegisterComponent(Id typeId)
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{
|
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var componentId = IdAssigner.Assign();
|
||||
TypeToComponentId.Add(typeof(T), componentId);
|
||||
ComponentIndex.Add(componentId, new List<Archetype>());
|
||||
ElementSizes.Add(componentId, Unsafe.SizeOf<T>());
|
||||
}
|
||||
|
||||
private void TryRegisterTypeId(Id typeId, int elementSize)
|
||||
{
|
||||
if (!ComponentIndex.ContainsKey(typeId))
|
||||
{
|
||||
RegisterTypeId(typeId, elementSize);
|
||||
}
|
||||
ComponentIndex.Add(typeId, new List<Archetype>());
|
||||
}
|
||||
|
||||
private void TryRegisterComponentId<T>() where T : unmanaged
|
||||
{
|
||||
if (!TypeToComponentId.ContainsKey(typeof(T)))
|
||||
TryRegisterTypeId<T>();
|
||||
var typeId = TypeToId[typeof(T)];
|
||||
if (!ComponentIndex.ContainsKey(typeId))
|
||||
{
|
||||
RegisterComponent<T>();
|
||||
RegisterComponent(typeId);
|
||||
}
|
||||
}
|
||||
|
||||
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
||||
private Id GetComponentId<T>() where T : unmanaged
|
||||
{
|
||||
return TypeToComponentId[typeof(T)];
|
||||
return TypeToId[typeof(T)];
|
||||
}
|
||||
|
||||
private void RegisterRelationType(Id typeId)
|
||||
{
|
||||
RelationIndex.Add(typeId, new RelationStorage(ElementSizes[typeId]));
|
||||
}
|
||||
|
||||
private void TryRegisterRelationType<T>() where T : unmanaged
|
||||
{
|
||||
TryRegisterTypeId<T>();
|
||||
var typeId = TypeToId[typeof(T)];
|
||||
if (!RelationIndex.ContainsKey(typeId))
|
||||
{
|
||||
RegisterRelationType(typeId);
|
||||
}
|
||||
}
|
||||
|
||||
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
||||
private RelationStorage GetRelationStorage<T>() where T : unmanaged
|
||||
{
|
||||
return RelationIndex[TypeToId[typeof(T)]];
|
||||
}
|
||||
|
||||
public bool Has<T>(Id entityId) where T : unmanaged
|
||||
|
@ -222,43 +241,49 @@ namespace MoonTools.ECS.Rev2
|
|||
MoveEntityToLowerArchetype(entityId, row, archetype, nextArchetype, componentId);
|
||||
}
|
||||
|
||||
private Id Pair(in Id relation, in Id target)
|
||||
{
|
||||
return new Id(relation.Low, target.Low);
|
||||
}
|
||||
|
||||
public void Relate<T>(in Id entityA, in Id entityB, in T relation) where T : unmanaged
|
||||
{
|
||||
TryRegisterComponentId<T>();
|
||||
var relationDataTypeId = GetComponentId<T>();
|
||||
TryRegisterRelationType<T>();
|
||||
var relationStorage = GetRelationStorage<T>();
|
||||
relationStorage.Set(entityA, entityB, relation);
|
||||
EntityRelationIndex[entityA].Add(TypeToId[typeof(T)]);
|
||||
EntityRelationIndex[entityB].Add(TypeToId[typeof(T)]);
|
||||
}
|
||||
|
||||
var typeId = Pair(relationDataTypeId, entityB);
|
||||
|
||||
TryRegisterTypeId(typeId, Unsafe.SizeOf<T>());
|
||||
SetRelationData(entityA, typeId, relation);
|
||||
public void Unrelate<T>(in Id entityA, in Id entityB) where T : unmanaged
|
||||
{
|
||||
var relationStorage = GetRelationStorage<T>();
|
||||
relationStorage.Remove(entityA, entityB);
|
||||
}
|
||||
|
||||
public bool Related<T>(in Id entityA, in Id entityB) where T : unmanaged
|
||||
{
|
||||
var relationDataTypeId = GetComponentId<T>();
|
||||
var typeId = Pair(relationDataTypeId, entityB);
|
||||
return Has(entityA, typeId);
|
||||
var relationStorage = GetRelationStorage<T>();
|
||||
return relationStorage.Has(entityA, entityB);
|
||||
}
|
||||
|
||||
public T GetRelationData<T>(in Id entityA, in Id entityB) where T : unmanaged
|
||||
{
|
||||
var relationDataTypeId = GetComponentId<T>();
|
||||
var typeId = Pair(relationDataTypeId, entityB);
|
||||
return Get<T>(entityA, typeId);
|
||||
var relationStorage = GetRelationStorage<T>();
|
||||
return relationStorage.Get<T>(entityA, entityB);
|
||||
}
|
||||
|
||||
private unsafe ref T Get<T>(Id entityId, Id typeId) where T : unmanaged
|
||||
public ReverseSpanEnumerator<(Id, Id)> Relations<T>() where T : unmanaged
|
||||
{
|
||||
var record = EntityIndex[entityId];
|
||||
var columnIndex = record.Archetype.ComponentToColumnIndex[typeId];
|
||||
var column = record.Archetype.ComponentColumns[columnIndex];
|
||||
var relationStorage = GetRelationStorage<T>();
|
||||
return relationStorage.All();
|
||||
}
|
||||
|
||||
return ref ((T*) column.Elements)[record.Row];
|
||||
public ReverseSpanEnumerator<Id> OutRelations<T>(Id entity) where T : unmanaged
|
||||
{
|
||||
var relationStorage = GetRelationStorage<T>();
|
||||
return relationStorage.OutRelations(entity);
|
||||
}
|
||||
|
||||
public ReverseSpanEnumerator<Id> InRelations<T>(Id entity) where T : unmanaged
|
||||
{
|
||||
var relationStorage = GetRelationStorage<T>();
|
||||
return relationStorage.InRelations(entity);
|
||||
}
|
||||
|
||||
private bool Has(Id entityId, Id typeId)
|
||||
|
@ -267,57 +292,19 @@ namespace MoonTools.ECS.Rev2
|
|||
return record.Archetype.ComponentToColumnIndex.ContainsKey(typeId);
|
||||
}
|
||||
|
||||
private void Add<T>(Id entityId, Id typeId, in T component) where T : unmanaged
|
||||
// used as a fast path by Archetype.ClearAll and snapshot restore
|
||||
internal void FreeEntity(Id entityId)
|
||||
{
|
||||
Archetype? nextArchetype;
|
||||
EntityIndex.Remove(entityId);
|
||||
IdAssigner.Unassign(entityId);
|
||||
|
||||
// move the entity to the new archetype
|
||||
var record = EntityIndex[entityId];
|
||||
var archetype = record.Archetype;
|
||||
|
||||
if (archetype.Edges.TryGetValue(typeId, out var edge))
|
||||
foreach (var relationTypeIndex in EntityRelationIndex[entityId])
|
||||
{
|
||||
nextArchetype = edge.Add;
|
||||
}
|
||||
else
|
||||
{
|
||||
// FIXME: pool the signatures
|
||||
var nextSignature = new ArchetypeSignature(archetype.Signature.Count + 1);
|
||||
archetype.Signature.CopyTo(nextSignature);
|
||||
nextSignature.Insert(typeId);
|
||||
|
||||
if (!ArchetypeIndex.TryGetValue(nextSignature, out nextArchetype))
|
||||
{
|
||||
nextArchetype = CreateArchetype(nextSignature);
|
||||
}
|
||||
|
||||
var newEdge = new ArchetypeEdge(nextArchetype, archetype);
|
||||
archetype.Edges.Add(typeId, newEdge);
|
||||
nextArchetype.Edges.Add(typeId, newEdge);
|
||||
var relationStorage = RelationIndex[relationTypeIndex];
|
||||
relationStorage.RemoveEntity(entityId);
|
||||
}
|
||||
|
||||
MoveEntityToHigherArchetype(entityId, record.Row, archetype, nextArchetype);
|
||||
|
||||
// add the new component to the new archetype
|
||||
var columnIndex = nextArchetype.ComponentToColumnIndex[typeId];
|
||||
var column = nextArchetype.ComponentColumns[columnIndex];
|
||||
column.Append(component);
|
||||
}
|
||||
|
||||
private unsafe void SetRelationData<T>(in Id entityId, in Id typeId, T data) where T : unmanaged
|
||||
{
|
||||
if (Has(entityId, typeId))
|
||||
{
|
||||
var record = EntityIndex[entityId];
|
||||
var columnIndex = record.Archetype.ComponentToColumnIndex[typeId];
|
||||
var column = record.Archetype.ComponentColumns[columnIndex];
|
||||
|
||||
((T*) column.Elements)[record.Row] = data;
|
||||
}
|
||||
else
|
||||
{
|
||||
Add(entityId, typeId, data);
|
||||
}
|
||||
EntityRelationIndex[entityId].Clear();
|
||||
}
|
||||
|
||||
public void Destroy(Id entityId)
|
||||
|
@ -342,6 +329,14 @@ namespace MoonTools.ECS.Rev2
|
|||
archetype.RowToEntity.RemoveLastElement();
|
||||
EntityIndex.Remove(entityId);
|
||||
IdAssigner.Unassign(entityId);
|
||||
|
||||
foreach (var relationTypeIndex in EntityRelationIndex[entityId])
|
||||
{
|
||||
var relationStorage = RelationIndex[relationTypeIndex];
|
||||
relationStorage.RemoveEntity(entityId);
|
||||
}
|
||||
|
||||
EntityRelationIndex[entityId].Clear();
|
||||
}
|
||||
|
||||
private void MoveEntityToHigherArchetype(Id entityId, int row, Archetype from, Archetype to)
|
||||
|
|
Loading…
Reference in New Issue