81 lines
2.7 KiB
C#
81 lines
2.7 KiB
C#
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using MoonTools.ECS;
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using Nerfed.Runtime.Components;
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using Nerfed.Runtime.Util;
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using System.Numerics;
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namespace Nerfed.Runtime.Systems
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{
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public class LocalToWorldThreadedSystem : MoonTools.ECS.System
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{
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private readonly Filter rootEntitiesFilter;
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private readonly Action<int> forEntity;
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public LocalToWorldThreadedSystem(World world) : base(world)
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{
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rootEntitiesFilter = FilterBuilder.Include<LocalTransform>().Exclude<Child>().Build();
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forEntity = UpdateEntity;
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}
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public override void Update(TimeSpan delta)
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{
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Parallel.For(0, rootEntitiesFilter.Count, forEntity);
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}
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private void UpdateEntity(int entityFilterIndex)
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{
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Entity entity = rootEntitiesFilter.NthEntity(entityFilterIndex);
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UpdateWorldTransform(entity, Matrix4x4.Identity);
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}
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private void UpdateWorldTransform(Entity entity, Matrix4x4 localToWorldMatrix)
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{
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// TODO: Only update dirty transforms.
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// If a parent is dirty all the children need to update their localToWorld matrix.
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// How do we check if something is dirty? How do we know if a LocalTransform has been changed?
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if (Has<LocalTransform>(entity))
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{
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LocalTransform localTransform = Get<LocalTransform>(entity);
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localToWorldMatrix = Matrix4x4.Multiply(localToWorldMatrix, localTransform.TRS());
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LocalToWorld localToWorld = new(localToWorldMatrix);
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Set(entity, localToWorld);
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//Task.Delay(10).Wait();
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//Log.Info($"Entity {entity} | local position {localTransform.position} | world position {localToWorldMatrix.Translation}");
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}
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ReverseSpanEnumerator<Entity> childEntities = World.InRelations<ChildParentRelation>(entity);
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foreach (Entity childEntity in childEntities)
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{
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UpdateWorldTransform(childEntity, localToWorldMatrix);
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}
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}
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}
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}
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//System.Random rnd = new System.Random();
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//World world = new World();
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//Filter filter = world.FilterBuilder.Include<Test>().Build();
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//for (int i = 0; i < 100; i++)
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//{
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// Entity e = world.CreateEntity(i.ToString());
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// world.Set(e, new Test());
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//}
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//Action<int> forEntityIndex = ForEntityIndex;
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//ParallelLoopResult result = Parallel.For(0, filter.Count, forEntityIndex);
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//Console.WriteLine(result.IsCompleted);
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//void ForEntityIndex(int entity)
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//{
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// int delay = rnd.Next(1, 1000);
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// Task.Delay(delay).Wait();
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// Console.WriteLine($"ForEntityIndex | {filter.NthEntity(entity).ID}");
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//}
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//namespace Hoi
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//{
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// public readonly record struct Test;
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//}
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