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36102b3536
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12f3ff451c
13 changed files with 300 additions and 113 deletions
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using System; |
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using gaemstone.Bloxel; |
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using gaemstone.Client; |
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using gaemstone.ECS; |
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namespace Immersion; |
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[Module] |
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public class ObserverModule |
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{ |
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[Observer(ObserverEvent.OnSet)] |
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public static void DoObserver(in Chunk chunk, in Mesh _) |
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=> Console.WriteLine($"Chunk at {chunk.Position} now has a Mesh!"); |
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} |
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@ -1,18 +1,32 @@ |
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using System; |
using System; |
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using static flecs_hub.flecs; |
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namespace gaemstone.ECS; |
namespace gaemstone.ECS; |
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[AttributeUsage(AttributeTargets.Method)] |
public enum ObserverEvent |
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public class ObserverAttribute : Attribute |
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{ |
{ |
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public Event Event { get; } |
OnAdd = ECS_HI_COMPONENT_ID + 33, |
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public ObserverAttribute(Event @event) |
OnRemove = ECS_HI_COMPONENT_ID + 34, |
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=> Event = @event; |
OnSet = ECS_HI_COMPONENT_ID + 35, |
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UnSet = ECS_HI_COMPONENT_ID + 36, |
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OnDelete = ECS_HI_COMPONENT_ID + 37, |
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OnCreateTable = ECS_HI_COMPONENT_ID + 38, |
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OnDeleteTable = ECS_HI_COMPONENT_ID + 39, |
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OnTableEmpty = ECS_HI_COMPONENT_ID + 40, |
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OnTableFill = ECS_HI_COMPONENT_ID + 41, |
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OnCreateTrigger = ECS_HI_COMPONENT_ID + 42, |
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OnDeleteTrigger = ECS_HI_COMPONENT_ID + 43, |
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OnDeleteObservable = ECS_HI_COMPONENT_ID + 44, |
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OnComponentHooks = ECS_HI_COMPONENT_ID + 45, |
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OnDeleteTarget = ECS_HI_COMPONENT_ID + 46, |
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} |
} |
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public enum Event |
[AttributeUsage(AttributeTargets.Method)] |
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public class ObserverAttribute : Attribute |
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{ |
{ |
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OnAdd, |
public ObserverEvent Event { get; } |
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OnSet, |
public string? Expression { get; } |
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OnRemove, |
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public ObserverAttribute(ObserverEvent @event) |
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=> Event = @event; |
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} |
} |
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@ -0,0 +1,65 @@ |
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using System; |
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using System.Linq; |
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using System.Reflection; |
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using gaemstone.Utility; |
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namespace gaemstone.ECS; |
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public enum RegisterableKind |
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{ |
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Entity, |
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Tag, |
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Component, |
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Relation, |
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System, |
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Observer, |
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Module, |
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} |
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public class RegisterableInfo |
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{ |
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public Type Type { get; } |
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public RegisterableKind Kind { get; } |
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public bool? PartOfModule { get; } |
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internal Type[] AllowedWith { get; } |
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internal RegisterableInfo(Type type, RegisterableKind kind, bool? partOfModule, Type[]? allowedWith = null) |
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{ Type = type; Kind = kind; PartOfModule = partOfModule; AllowedWith = allowedWith ?? Array.Empty<Type>(); } |
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} |
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public static class RegisterableExtensions |
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{ |
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// These are ordered by priority. For example a type marked with [Component, Relation] |
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// will result in RegisterableKind.Relation due to being first in the list. |
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private static readonly RegisterableInfo[] _knownAttributes = new RegisterableInfo[] { |
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new(typeof(RelationAttribute) , RegisterableKind.Relation , null, new[] { typeof(ComponentAttribute), typeof(TagAttribute) }), |
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new(typeof(ComponentAttribute) , RegisterableKind.Component , null, new[] { typeof(EntityAttribute) }), |
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new(typeof(TagAttribute) , RegisterableKind.Tag , null), |
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new(typeof(EntityAttribute) , RegisterableKind.Entity , null), |
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new(typeof(ModuleAttribute) , RegisterableKind.Module , false), |
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new(typeof(SystemAttribute) , RegisterableKind.System , true), |
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new(typeof(ObserverAttribute) , RegisterableKind.Observer , true), |
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}; |
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public static RegisterableInfo? GetRegisterableInfo(this MemberInfo member, out bool isPartOfModule) |
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{ |
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isPartOfModule = member.DeclaringType?.Has<ModuleAttribute>() == true; |
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var matched = _knownAttributes.Where(a => member.GetCustomAttribute(a.Type) != null).ToList(); |
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if (matched.Count == 0) return null; |
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var attr = matched[0]; |
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var disallowed = matched.Except(new[] { attr }).Select(a => a.Type).Except(attr.AllowedWith); |
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if (disallowed.Any()) throw new InvalidOperationException( |
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$"{member} marked with {attr.Type} may not be used together with " + string.Join(", ", disallowed)); |
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if (attr.PartOfModule == true && !isPartOfModule) throw new InvalidOperationException( |
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$"{member} marked with {attr.Type} must be part of a module"); |
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if (attr.PartOfModule == false && isPartOfModule) throw new InvalidOperationException( |
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$"{member} marked with {attr.Type} must not be part of a module"); |
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return attr; |
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} |
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} |
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@ -0,0 +1,93 @@ |
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using System; |
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using System.Collections; |
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using System.Collections.Generic; |
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using System.Reflection; |
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using gaemstone.Utility; |
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using gaemstone.Utility.IL; |
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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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public ObserverInfo RegisterObserver(Action<Iterator> callback, string expression, |
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ObserverEvent @event, string? name = null) |
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=> RegisterObserver(name ?? callback.Method.Name, expression, @event, new() { expr = expression }, callback); |
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public ObserverInfo RegisterObserver(Action<Iterator> callback, ecs_filter_desc_t filter, |
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ObserverEvent @event, string? name = null) |
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=> RegisterObserver(name ?? callback.Method.Name, null, @event, filter, callback); |
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public ObserverInfo RegisterObserver(string name, string? expression, |
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ObserverEvent @event, ecs_filter_desc_t filter, Action<Iterator> callback) |
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{ |
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var observerDesc = default(ecs_observer_desc_t); |
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observerDesc.filter = filter; |
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observerDesc.events[0] = (ecs_entity_t)(ecs_id_t)(uint)@event; |
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observerDesc.binding_ctx = (void*)UniverseSystems.CreateSystemCallbackContext(this, callback); |
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observerDesc.callback.Data.Pointer = &UniverseSystems.SystemCallback; |
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observerDesc.entity = Create(name); |
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var entity = new Entity(this, ecs_observer_init(Handle, &observerDesc)); |
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var observer = new ObserverInfo(this, entity, name, expression, @event, filter, callback); |
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Observers._observers.Add(observer); |
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return observer; |
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} |
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public ObserverInfo RegisterObserver(object? instance, MethodInfo method) |
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{ |
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var attr = method.Get<ObserverAttribute>() ?? throw new ArgumentException( |
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"Observer must specify ObserverAttribute", nameof(method)); |
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var param = method.GetParameters(); |
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if (param.Length == 1 && param[0].ParameterType == typeof(Iterator)) { |
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if (attr.Expression == null) throw new Exception( |
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"Observer must specify expression in ObserverAttribute"); |
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var action = (Action<Iterator>)Delegate.CreateDelegate(typeof(Action<Iterator>), instance, method); |
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return RegisterObserver(method.Name, attr.Expression, attr.Event, |
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new() { expr = attr.Expression }, action); |
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} else { |
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var gen = QueryActionGenerator.GetOrBuild(this, method); |
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var filter = (attr.Expression == null) ? gen.Filter : new() { expr = attr.Expression }; |
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return RegisterObserver(method.Name, attr.Expression, attr.Event, |
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filter, iter => gen.RunWithTryCatch(instance, iter)); |
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} |
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} |
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public class UniverseObservers |
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: IReadOnlyCollection<ObserverInfo> |
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{ |
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internal readonly List<ObserverInfo> _observers = new(); |
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// IReadOnlyCollection implementation |
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public int Count => _observers.Count; |
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public IEnumerator<ObserverInfo> GetEnumerator() => _observers.GetEnumerator(); |
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IEnumerator IEnumerable.GetEnumerator() => GetEnumerator(); |
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} |
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public class ObserverInfo |
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{ |
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public Universe Universe { get; } |
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public Entity Entity { get; } |
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public string Name { get; } |
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public string? Expression { get; } |
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public ObserverEvent Event { get; } |
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public ecs_filter_desc_t Filter { get; } |
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public Action<Iterator> Callback { get; } |
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internal ObserverInfo(Universe universe, Entity entity, string name, string? expression, |
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ObserverEvent @event, ecs_filter_desc_t filter, Action<Iterator> callback) |
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{ |
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Universe = universe; |
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Entity = entity; |
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Name = name; |
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Expression = expression; |
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Event = @event; |
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Filter = filter; |
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Callback = callback; |
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} |
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} |
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} |
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