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47 lines
1.1 KiB
47 lines
1.1 KiB
2 years ago
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using System;
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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 sealed class Query
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: IDisposable
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{
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public World World { get; }
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public ecs_query_t* Handle { get; }
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public Query(World world, QueryDesc desc)
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{
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using var alloc = TempAllocator.Use();
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var flecsDesc = desc.ToFlecs(alloc);
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World = world;
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Handle = ecs_query_init(world, &flecsDesc);
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}
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public void Dispose()
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=> ecs_query_fini(this);
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public Iterator Iter()
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=> new(World, IteratorType.Query, ecs_query_iter(World, this));
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public override string ToString()
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=> ecs_query_str(Handle).FlecsToStringAndFree()!;
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public static implicit operator ecs_query_t*(Query q) => q.Handle;
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}
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public class QueryDesc : FilterDesc
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{
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public QueryDesc(string expression) : base(expression) { }
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public QueryDesc(params Term[] terms) : base(terms) { }
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public new unsafe ecs_query_desc_t ToFlecs(IAllocator allocator)
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{
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var desc = new ecs_query_desc_t {
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filter = base.ToFlecs(allocator),
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// TODO: Implement more Query features.
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};
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return desc;
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}
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}
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