Don't see the mesh

Hi all!

I'm creating meshes via the code, but depending on their position sometimes I can see them and sometimes not.
I tried to set their normals:

Code (CSharp):

1. var normals = mesh.normals;
2. for (int i = 0; i < normals.Length; i++)
3. {
4.         normals[i] = Vector3.back;
5. }
6. mesh.normals = normals;

But it didn't help. Even if I scale the scene (in Pause mode) to the mesh, it is hidden, but it exists.

Thanks!

 

Maybe you "meshed" it up? hehe jokes aside.. Do you have a Mesh Render component attached?

Flip the polygones?

 

Yes, renderer exists. And mesh filter.
I use my prefab, create a mesh, attach it to a gameobject. Here is the whole code.

Code (CSharp):

1. var mesh = new Mesh();
2.  
3.         Vector3[] vertices = new Vector3[4];
4.         vertices[0] = new Vector2(x1, y1);
5.         vertices[1] = new Vector2(x2, y2);
6.         vertices[2] = new Vector2(x3, y3);
7.         vertices[3] = new Vector2(x4, y4);
8.  
9.         Vector2[] uvs = new Vector2[4];
10.         uvs[0] = new Vector2(0, 1);
11.         uvs[1] = new Vector2(1, 1);
12.         uvs[2] = new Vector2(0, 0);
13.         uvs[3] = new Vector2(1, 0);
14.  
15.         int[] triangles = new int[6] { 0, 1, 3, 3, 2, 0 };
16.  
17.         mesh.vertices = vertices;
18.         mesh.uv = uvs;
19.         mesh.triangles = triangles;
20.  
21.         var normals = mesh.normals;
22.         for (int i = 0; i < normals.Length; i++)
23.         {
24.             normals[i] = Vector3.back;
25.         }
26.         mesh.normals = normals;
27.  
28.         meshes.Add(mesh);
29.  
30.         var meshObject = Instantiate(GameManager.Instance.RoadMeshPrefab, Vector3.zero, Quaternion.identity);
31.         meshObject.GetComponent<MeshFilter>().mesh = mesh;
32.         meshObject.transform.parent = RoadParent.transform;
33.         meshObject.GetComponent<Renderer>().material.color = color;

Sometimes I change game parameters and meshes are created in different positions. And sometimes they are visible. I don't know the reason.

 

tryed normals = Vector3.front ?

 

Yes, it was the first version. Then Vector3.back.

 

Vector3.forward, not front

 

No more ideas?

 

Try this:

mesh.RecalculateNormals();

just before you Add it
meshes.Add(mesh);

I've never had any luck manually adding Normals.
I just RN now.

---

If you make a List of meshes to then be Combined
Wait til after that to run Recalculate on the final combined mesh.

https://docs.unity3d.com/ScriptReference/Mesh.RecalculateNormals.html

 

No, didn't help.

I don't combine meshes, just create a few ones.

Is there another way to create a shape of my own form? To be more exact, I just need some 4-corners, not parallelograms.

 

Did you comment out the manual normal making code?

 

Maybe the bounds of the Mesh are off screen and thus culled by the frustum culler. Try RecalculateBounds or assign a valid Bounds to the mesh yourself.

 

try with

Code (CSharp):

1.  
2. meshObject.GetComponent<MeshFilter>().sharedMesh = mesh;
3. meshObject.GetComponent<Renderer>().sharedMaterial.color = color;
4.  

otherwise it will create a new instance of the mesh and material

 

Yeah I RecalculateBounds() too

 

I tried all your advice and still didn't see some meshes. Then I corrected some game params and now see them all. But maybe they will dissapear again when I change some parameters again - then will try your adice again. Thanks!