How do you create a mesh in code using DOTS?

I'd like to create a mesh in code, lets say a quad. With a GameObject I could do it with the following Monobehavior. the new entities and components can only use primitive types? How would I go about doing this with the new DOTS setup?

Code (CSharp):

1. Mesh mesh = new Mesh();
2.  
3.     Vector3[] vertices = new Vector3[4];
4.     Vector3[] normals = new Vector3[4];
5.     Vector2[] uvs = new Vector2[4];
6.     int[] triangles = new int[6];
7.  
8.     Vector2 uv00 = new Vector2( 0f, 0f );
9.     Vector2 uv10 = new Vector2( 1f, 0f );
10.     Vector2 uv01 = new Vector2( 0f, 1f );
11.     Vector2 uv11 = new Vector2( 1f, 1f );
12.  
13.     Vector3 p0 = new Vector3( -0.5f,  -0.5f,  0.5f );
14.     Vector3 p1 = new Vector3(  0.5f,  -0.5f,  0.5f );
15.     Vector3 p2 = new Vector3(  0.5f,  -0.5f, -0.5f );
16.     Vector3 p3 = new Vector3( -0.5f,  -0.5f, -0.5f );      
17.     Vector3 p4 = new Vector3( -0.5f,   0.5f,  0.5f );
18.     Vector3 p5 = new Vector3(  0.5f,   0.5f,  0.5f );
19.     Vector3 p6 = new Vector3(  0.5f,   0.5f, -0.5f );
20.     Vector3 p7 = new Vector3( -0.5f,   0.5f, -0.5f );
21.  
22.  
23.     vertices = new Vector3[] {p4, p5, p1, p0};
24.     normals = new Vector3[] {Vector3.forward,
25.                              Vector3.forward,
26.                              Vector3.forward,
27.                              Vector3.forward};
28.  
29.     uvs = new Vector2[] {uv11, uv01, uv00, uv10};
30.     triangles = new int[] {3, 1, 0, 3, 2, 1};
31.  
32.     mesh.vertices = vertices;
33.     mesh.normals = normals;
34.     mesh.uv = uvs;
35.     mesh.triangles = triangles;
36.    
37.     mesh.RecalculateBounds();
38.  
39.     GameObject quad = new GameObject("quad");
40.     quad.transform.parent = this.gameObject.transform;
41.      MeshFilter meshFilter = (MeshFilter) quad.AddComponent(typeof(MeshFilter));
42.     meshFilter.mesh = mesh;
43.     MeshRenderer renderer = quad.AddComponent(typeof(MeshRenderer)) as MeshRenderer;
44.     renderer.material = cubeMaterial;

 

If the quad is always the same for many entities, I would store mesh data in a renderer system and add a tag component to the entities for which you want to render the quad. Or you can store the mesh data in a sharedcomponent that can contain reference types. Then loop over these entities to call Graphics.DrawMeshInstanced for each of them.

This is basically what the hybridrenderer package does.

 

Thanks for the reply