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63 lines
2.4 KiB
63 lines
2.4 KiB
using System; |
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using System.Collections.Generic; |
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using gaemstone.Utility; |
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using static flecs_hub.flecs; |
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namespace gaemstone.ECS; |
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public unsafe partial class Universe |
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{ |
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private readonly Dictionary<Type, Entity> _lookupByType = new(); |
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public void AddLookupByType(Type type, Entity entity) |
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=> _lookupByType.Add(type, entity); |
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public void RemoveLookupByType(Type type) |
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{ if (!_lookupByType.Remove(type)) throw new InvalidOperationException( |
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$"Lookup for {type} does not exist"); } |
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private EntityRef? CreateOrNull(Entity entity) |
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=> EntityRef.CreateOrNull(this, entity); |
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public EntityRef? Lookup<T>() |
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=> Lookup(typeof(T)); |
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public EntityRef? Lookup(Type type) |
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=> Lookup(_lookupByType.GetValueOrDefault(type)); |
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public EntityRef? Lookup(Entity value) |
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=> CreateOrNull(new(ecs_get_alive(this, value))); |
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public EntityRef? Lookup(EntityPath path) |
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=> Lookup(default, path); |
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public EntityRef? Lookup(Entity parent, EntityPath path) |
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=> CreateOrNull(EntityPath.Lookup(this, parent, path)); |
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public EntityRef? LookupSymbol(string symbol) |
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{ |
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using var alloc = TempAllocator.Use(); |
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return CreateOrNull(new(ecs_lookup_symbol(this, alloc.AllocateCString(symbol), false))); |
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} |
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public EntityRef LookupOrThrow<T>() => LookupOrThrow(typeof(T)); |
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public EntityRef LookupOrThrow(Type type) => Lookup(type) |
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?? throw new EntityNotFoundException($"Entity of type {type} not found"); |
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public EntityRef LookupOrThrow(Entity entity) => Lookup(entity) |
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?? throw new EntityNotFoundException($"Entity {entity} not alive"); |
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public EntityRef LookupOrThrow(EntityPath path) => Lookup(default, path) |
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?? throw new EntityNotFoundException($"Entity '{path}' not found"); |
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public EntityRef LookupOrThrow(Entity parent, EntityPath path) => Lookup(parent, path) |
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?? throw new EntityNotFoundException($"Child entity of {parent} '{path}' not found"); |
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public EntityRef LookupSymbolOrThrow(string symbol) => LookupSymbol(symbol) |
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?? throw new EntityNotFoundException($"Entity with symbol '{symbol}' not found"); |
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public class EntityNotFoundException : Exception |
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{ public EntityNotFoundException(string message) : base(message) { } } |
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} |
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public static class LookupExtensions |
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{ |
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public static EntityRef CreateLookup<T>(this EntityRef entity) |
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=> entity.CreateLookup(typeof(T)); |
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public static EntityRef CreateLookup(this EntityRef entity, Type type) |
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{ entity.Universe.AddLookupByType(type, entity); return entity; } |
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}
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