DynamicBuffer Multithread

Hi,

is it somehow possible to use DynamicBuffer in Multithread context e.g IJobParallelFor, but parallel schedule? Not one depend on previously Completed

Not like this

Code (CSharp):

1. protected override JobHandle OnUpdate(JobHandle inputDeps)
2. {
3.     for (int i = 0; i < chunk.Length; i++)
4.     {
5.         inputDeps = new MyJob(...).Schedule(size, batchCount, inputDeps);
6.     }
7.  
8.     return inputDeps;
9. }

Spoiler: Components

Code (CSharp):

1. public struct Triangles : IBufferElementData
2. {
3.     public int Value;
4. }
5.  
6. public struct Vertices : IBufferElementData
7. {
8.     public Vector3 Value;
9. }

Spoiler: Job

Code (CSharp):

1. public struct MyJob : IJobParallelFor
2. {
3.     [NativeDisableParallelForRestriction] public DynamicBuffer<Vector3> _vertices;
4.     [NativeDisableParallelForRestriction] public DynamicBuffer<int> _triangles;
5.     [ReadOnly] public MeshData _meshData;
6.     [ReadOnly] public Vector2 Offset;
7.  
8.     public MyJob(DynamicBuffer<Vector3> vertices, DynamicBuffer<int> triangles, MeshData meshData, Vector2 offset)
9.     {
10.         _vertices = vertices;
11.         _triangles = triangles;
12.         _meshData = meshData;
13.         Offset = offset;
14.     }
15.  
16.     public void Execute(int index)
17.     {
18.         var position = Position(index, _meshData.Size);
19.  
20.         _vertices[index] = Vertex(_meshData.StepSize, position, Offset, _meshData.NoiseSettings);
21.         if (position.x < _meshData.Size && position.y < _meshData.Size)
22.         {
23.             var t = 6 * (index - position.y);
24.             _triangles[t] = index;
25.             _triangles[t + 1] = index + _meshData.Size + 1;
26.             _triangles[t + 2] = index + 1;
27.             _triangles[t + 3] = index + 1;
28.             _triangles[t + 4] = index + _meshData.Size + 1;
29.             _triangles[t + 5] = index + _meshData.Size + 2;
30.         }
31.     }
32.  
33.     private Vector2Int Position(int index, int size)
34.     {
35.         return new Vector2Int(
36.             index % (size + 1),
37.             index / (size + 1)
38.         );
39.     }
40.  
41.     private Vector3 Vertex(float stepSize, Vector2Int position, Vector2 offset, NoiseSettings noiseSettings)
42.     {
43.         var point = Common.MiddlePosition(position.x, position.y, stepSize, offset);
44.         var noiseValue = Common.NoiseValue(point, noiseSettings);
45.         return new Vector3(position.x * stepSize - 0.5f, noiseValue, position.y * stepSize - 0.5f);
46.     }
47. }

Spoiler: System

Code (CSharp):

1. public sealed class MeshBuilderSystem : JobComponentSystem
2. {
3.     private struct Data
4.     {
5.         public readonly int Length;
6.         public ComponentDataArray<Position> Position;
7.         public BufferArray<Triangles> Triangles;
8.         public BufferArray<Vertices> Vertices;
9.     }
10.  
11.     [Inject] private Data _data;
12.  
13.     protected override JobHandle OnUpdate(JobHandle inputDeps)
14.     {
15.         var meshData = new MeshData(
16.             _terrainSettings.Resolution,
17.             _terrainSettings.NoiseSettings
18.         );
19.  
20.         var jobHandles = new NativeArray<JobHandle>(_terrainSettings.ChunkCount, Allocator.Temp);
21.         for (int i = 0; i < _data.Length; i++)
22.         {
23.             _data.Vertices[i].ResizeUninitialized(
24.                 (_terrainSettings.Resolution + 1) * (_terrainSettings.Resolution + 1)
25.             );
26.             _data.Triangles[i].ResizeUninitialized(
27.                 _terrainSettings.Resolution * _terrainSettings.Resolution * 6
28.             );
29.  
30.             var offset = _data.Position[i].Value;
31.  
32.             jobHandles[i] = new MyJob(
33.                 _data.Vertices[i].Reinterpret<Vector3>(),
34.                 _data.Triangles[i].Reinterpret<int>(),
35.                 meshData,
36.                 new Vector2(offset.x, offset.z)
37.             ).Schedule(
38.                 (_terrainSettings.Resolution + 1) * (_terrainSettings.Resolution + 1),
39.                 64,
40.                 inputDeps
41.             );
42.         }
43.  
44.         return JobHandle.CombineDependencies(jobHandles);
45.     }
46. }

Thanks

 

https://github.com/Unity-Technologi...tation/content/scheduling_a_job_from_a_job.md

 

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To get an answer to a question with a broken link when you are already frustrated enough about your question or problem to bring it to a forum of your peers does not contribute to factors that would lessen the lessen the blood pressure. A little respect for your peer group seems in order if one presents what is supposed to be an answer. As well..outdated links to code for DOTS is a guaranteed road to hell paved with good intentions. That said I sure am learning one hell of a great deal of the instrinsics of compiling and multithreading in relation to performance hanging out here. The science nerd puzzle kid inside me is fascinated.