Question Created This Mesh Rendering Script But Can Not Do More Than 1

Code:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class MeshControl : MonoBehaviour
6. {
7.  
8.     private List<Vector3> grid;
9.     private Material[] materials;
10.  
11.     [SerializeField]
12.     private Object node;
13.  
14.     private Vector3[] vertices;
15.     private Vector3[] normals;
16.     private int[] triangles;
17.     private Mesh mesh;
18.     private MeshFilter mf;
19.  
20.     private int i;
21.  
22.     void Start()
23.     {
24.         grid = new List<Vector3>();
25.         AddMesh(new Vector3(0, 0, 0), new Vector3(3, 1, 3), new Vector3(3, 0, 4));
26.        
27.         LoadMeshs();
28.     }
29.  
30.     void Update()
31.     {
32.        
33.     }
34.  
35.     void BuildMesh(Vector3 vec1, Vector3 vec2, Vector3 vec3, bool invert)
36.     {
37.         int a = i - 1;
38.  
39.         vertices[0 + a] = vec1;
40.         vertices[1 + a] = vec2;
41.         vertices[2 + a] = vec3;
42.  
43.         normals[0 + a] = new Vector3(Mathf.Sin(GetDir(new Vector2(vec1.x - vec2.x, vec1.z - vec2.z))), Mathf.Sin(GetDir(new Vector2(vec1.x - vec2.x, vec1.y - vec2.y))), Mathf.Cos(GetDir(new Vector2(vec1.x - vec2.x, vec1.z - vec2.z))));
44.         normals[1 + a] = new Vector3(Mathf.Sin(GetDir(new Vector2(vec1.x - vec2.x, vec1.z - vec2.z))), Mathf.Sin(GetDir(new Vector2(vec1.x - vec2.x, vec1.y - vec2.y))), Mathf.Cos(GetDir(new Vector2(vec1.x - vec2.x, vec1.z - vec2.z))));
45.         normals[2 + a] = new Vector3(Mathf.Sin(GetDir(new Vector2(vec1.x - vec2.x, vec1.z - vec2.z))), Mathf.Sin(GetDir(new Vector2(vec1.x - vec2.x, vec1.y - vec2.y))), Mathf.Cos(GetDir(new Vector2(vec1.x - vec2.x, vec1.z - vec2.z))));
46.  
47.         triangles[0 + a] = 0 + a;
48.         triangles[1 + a] = 1 + a;
49.         triangles[2 + a] = 2 + a;
50.  
51.         mesh.vertices = vertices;
52.         mesh.normals = normals;
53.         mesh.triangles = triangles;
54.  
55.         mf = GetComponent<MeshFilter>();
56.         mf.mesh = mesh;
57.         Instantiate(node, vec1, transform.rotation);
58.         Instantiate(node, vec2, transform.rotation);
59.         Instantiate(node, vec3, transform.rotation);
60.  
61.     }
62.  
63.     float GetDir(Vector2 pos)
64.     {
65.         if (pos.y < 0)
66.         {
67.             return (Mathf.Atan(pos.x / pos.y) + 180f);
68.         }
69.         else
70.         {
71.             return (Mathf.Atan(pos.x / pos.y) + 0f);
72.         }
73.     }
74.  
75.     void AddMesh(Vector3 vec1, Vector3 vec2, Vector3 vec3)
76.     {
77.         grid.Add(vec1);
78.         grid.Add(vec2);
79.         grid.Add(vec3);
80.     }
81.  
82.     void LoadMeshs()
83.     {
84.         mesh = new Mesh();
85.         vertices = new Vector3[grid.Count];
86.         normals = new Vector3[grid.Count];
87.         triangles = new int[grid.Count];
88.  
89.         i = 0;
90.         for (int a = 0; a <= grid.Count / 3; a++)
91.         {
92.             i++;
93.             if (i - 1 < grid.Count / 3)
94.             {
95.                 BuildMesh(grid[i*3-3], grid[i*3-2], grid[i*3-1], false);
96.             }
97.         }
98.     }
99.  
100.     void ClearAll()
101.     {
102.         GetComponent<MeshFilter>().mesh.Clear(false);
103.     }
104. }
105.  

This code will work but if I add another

AddMesh(new Vector3(0, 0, 0), new Vector3(3, 1, 3), new Vector3(3, 0, 4));

it will not render them at all.

 

Your

AddMesh

method does nothing but add three elements to a list. You actually need to update the mesh afterwards.

 

yes but after that I do

LoadMeshs

which will use the grid to load them

 

Would've been useful to mention that then. Can't read minds, mate.

Are the normals facing the right way?

You should really be debugging this on your own rather than posting a forum thread with every single issue you hit.