Issue with RenderMesh component -> MEsh not displayed

Hello,
trying to follow 1st CodeMonkey Tutorial on ECS:

At 14:40, in my implementation the RenderMesh does not appear.
Not sure what I'm doing wrong.

Code:

Code (CSharp):

1.     [SerializeField] Mesh mesh;
2.     [SerializeField] Material material;
3.  
4.     // Start is called before the first frame update
5.     void Start()
6.     {
7.         EntityManager entityManager = World.DefaultGameObjectInjectionWorld.EntityManager;
8.  
9.         EntityArchetype entityArchetype = entityManager.CreateArchetype(
10.             typeof(LevelComponent),
11.             typeof(Translation),
12.             typeof(RenderMesh),
13.             typeof(LocalToWorld)
14.         );
15.  
16.         NativeArray<Entity> entityArray = new NativeArray<Entity>(1, Allocator.Temp);
17.         entityManager.CreateEntity(entityArchetype, entityArray);
18.  
19.         for (int i = 0; i < entityArray.Length; i++)
20.         {
21.             Entity entity = entityArray[i];
22.             entityManager.SetComponentData(entity, new LevelComponent { level = Random.Range(10, 20) });
23.  
24.             entityManager.SetSharedComponentData(entity, new RenderMesh
25.             {
26.                 mesh = mesh,
27.                 material = material
28.             });
29.  
30.         }
31.  
32.         entityArray.Dispose();
33.     }

Setup in Unity (I first tried with the quad and a sprite texure as in the Tutorial, then a cube and a more simple material):


Does the entity Archetype require additional components for the render mesh to work ? If yes, which ones ?
Any other hint on why it does not work ?

Thanks for the help.

 

Install the Hybrid renderer package.

 

Add RenderBounds and set bounds by mesh.bounds.ToAABB(). From 0.6.0 behaviour changed, now you should declare RenderBounds manually for entities created frrom scratch in code.

 

He already has it I guess (because RenderMesh not throw him error )

 

Thanks a lot that did it.
I only had to add RenderBounds in the Archetype.
No need to set the AABB value.

 

Thus it will be incorrect zero sized bounds and on view edges it wouldn't render, because it will calc frustrum culling by pivot point only.

 

Ok, I see, thanks

 

... after about 5 hours of trying all sorts of things, this one comment fixed it all. THANK YOU.

 

Uhhh, why was this never mentioned? The Hybrid Renderer changelog is full of "Updated dependencies of this package." But nothing about actual changes. The front page still says

"An entity is rendered if it has both a LocalToWorld component, from the Unity.Transforms namespace, and a RenderMesh component, from the Unity.Rendering namespace. The Hybrid Renderer systems adds other components needed for rendering, such as RenderBounds and PerInstanceCullingTag, automatically"

Please, please, Unity, update the docs after each change, how hard can it be?

 

I have tried following the same tutorial but have hit the same problem.
Entities are being created but no Meshes are displayed on camera.

The only changes i have made are to the EntityManager definition

EntityManager entityManager = World.DefaultGameObjectInjectionWorld.EntityManager;

and adding typeof(RenderBounds) to the Archetype

Adding this has no effect for me:
entityManager.SetComponentData(entity,
new RenderBounds
{
Value = mesh.bounds.ToAABB()
}
);

The packages and versions I am isung are as follows:
- Unity 2019.3.0f3
- Burst 1.2.3
- Entities 0.6.0

 

Yes I think I had to create the entity manager as you.

As for your issue, I have no idea. For me it worked.
Did you check your mesh can be displayed without using ECS (like standard object: drag & drop in the hierarchy/scene).

 

I actually have a weird variation of this bug. So, I'm rendering an isomorphic grid. In my grid node, I generate a rotated quad mesh and assign the mesh and material. Oddly, if I specify a non-uniform scale set to the position vector:

Code (CSharp):

1.  
2. ecbp.SetComponent<NonUniformScale>(entity.Index, entity, new NonUniformScale
3.             {
4.                 Value = new float3{
5.                     x =
6. (gridNodes[index].x - gridNodes[index].y) * gridNodes[index].tileWidth/2,
7.                     y =
8. (gridNodes[index].y + gridNodes[index].x) * gridNodes[index].tileHeight/2,
9.                     z = 0
10.                 }
11.             });
12.  

then the meshes render (wrongly, obviously). However, if I set it to a non-uniform scale at a reasonable value, or if I use Scale at all, it doesn't render at all. Nearly impossible to debug, and all of the values are reasonable in the entity debugger for all of the entities.

 

I tried to set LayerMask to -1 and it was displayed successfully.

Code (CSharp):

1. var layerMask = -1;
2.         renderMesh.layerMask = (uint)layerMask;
3.         RenderMeshUtility.AddComponents(entityProto, EntityManager, new RenderMeshDescription() { RenderMesh = renderMesh });