DOTS and Unity Physics - instantiate Entities and select entities with raycast

Hi,
As I understood there was no physics engine for ECS before. Now it is this:
https://docs.unity3d.com/Packages/com.unity.physics@0.0/manual/index.html

I need to instantiate enities with the PhysicsShape component. To use it in InputSystem, where I can do raycast and hover, select entities.
Unfortunately I'm not able to do this from script. How to setup component called PhysicsShape in script below?

Could you please help me?
What I'm doing wrong?
Is there some more documentation or sample projects?

Code (CSharp):

1.   GemArchetype = entityManager.CreateArchetype(
2.             typeof(Field),
3.             typeof(Translation),
4.             typeof(RenderMesh),
5.             typeof(LocalToWorld),
6.             typeof(PhysicsShape)
7.         );

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using Unity.Collections;
4. using Unity.Entities;
5. using Unity.Mathematics;
6. using Unity.Physics.Authoring;
7. using Unity.Rendering;
8. using Unity.Transforms;
9. using UnityEngine;
10.  
11. public class SpawnBoardSystem : ComponentSystem {
12.  
13.     protected override void OnUpdate() {
14.         EntityManager entityManager = World.Active.EntityManager;
15.  
16.         Entities.ForEach((Entity e, ref Board boardData) => {
17.             NativeArray<Entity> gemArray = new NativeArray<Entity>(boardData.SizeX * boardData.SizeY, Allocator.Temp);
18.             entityManager.CreateEntity(Main.GemArchetype, gemArray);
19.  
20.             var id = 0;
21.             for (int i = 0; i < boardData.SizeX; i++) {
22.                 for (int j = 0; j < boardData.SizeY; j++) {
23.                     var gem = gemArray[id];
24.  
25.                     entityManager.SetSharedComponentData(gem, new RenderMesh {
26.                         material = Main.FlatShadedMaterial,
27.                         mesh = Main.BlueGemMesh
28.                     });
29.                     entityManager.SetComponentData(gem, new Translation {
30.                         Value = new float3(i * boardData.Spacing, j*boardData.Spacing, 0)
31.                     });
32.  
33.                     // THIS LINE BELOW. HOW should I implement this?
34.                    // entityManager.SetComponentData(gem, new PhysicsShape{});
35.                    
36.                     id++;
37.                 }
38.             }
39.  
40.             EntityManager.DestroyEntity(e);
41.         });
42.     }
43.  
44. }

 

Hi @w4der,
1) you need to see the new documentation 0.2 not 0.0, link
2) a physics entity needs other components.
More details : link
Look at Creating bodies from scratch.

 

@Opeth001
Thank you for your reply. I will dig into this topic.
It is harder than I expected to start using DOTS in "real case" projects. ;(

 

It was hard for me at the beginning ( still sometimes xD ) also ECS still in preview so API changes constantly.
But when you see the benefits it's worth.
Performance
No more super dependencies between systems, each logic is independent from others so can be customized at any time.

 

I suggest look into physics samples.
https://github.com/Unity-Technologies/EntityComponentSystemSamples
There are few examples, but I suggest look in compound.
You can find all you need for spawning cube physics and raycast + other cast tests.

 

@Antypodish Thank you very much for this information!!!!!