46 lines
1.3 KiB
C#
46 lines
1.3 KiB
C#
namespace OECS;
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/// <summary>
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/// Describes a single change that occurred in the ECS world.
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/// </summary>
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public readonly struct EntityChange : IEquatable<EntityChange>
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{
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/// <summary>
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/// The entity that was affected.
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/// </summary>
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public Entity Entity { get; }
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/// <summary>
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/// The kind of change.
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/// </summary>
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public ChangeKind Kind { get; }
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/// <summary>
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/// The component type involved, or null for entity-level changes
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/// (<see cref="ChangeKind.EntityAdded"/> / <see cref="ChangeKind.EntityRemoved"/>).
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/// </summary>
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public Type? ComponentType { get; }
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internal EntityChange(Entity entity, ChangeKind kind, Type? componentType = null)
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{
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Entity = entity;
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Kind = kind;
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ComponentType = componentType;
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}
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public bool Equals(EntityChange other)
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{
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return Entity.Equals(other.Entity)
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&& Kind == other.Kind
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&& ComponentType == other.ComponentType;
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}
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public override bool Equals(object? obj) => obj is EntityChange other && Equals(other);
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public override int GetHashCode() => HashCode.Combine(Entity, Kind, ComponentType);
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public override string ToString() => ComponentType == null
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? $"{Kind} {Entity}"
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: $"{Kind} {ComponentType.Name} on {Entity}";
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}
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