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

Unity Engine
,
1

Code:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class MeshControl : MonoBehaviour
{

    private List<Vector3> grid;
    private Material[] materials;

    [SerializeField]
    private Object node;

    private Vector3[] vertices;
    private Vector3[] normals;
    private int[] triangles;
    private Mesh mesh;
    private MeshFilter mf;

    private int i;

    void Start()
    {
        grid = new List<Vector3>();
        AddMesh(new Vector3(0, 0, 0), new Vector3(3, 1, 3), new Vector3(3, 0, 4));
       
        LoadMeshs();
    }

    void Update()
    {
       
    }

    void BuildMesh(Vector3 vec1, Vector3 vec2, Vector3 vec3, bool invert)
    {
        int a = i - 1;

        vertices[0 + a] = vec1;
        vertices[1 + a] = vec2;
        vertices[2 + a] = vec3;

        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))));
        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))));
        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))));

        triangles[0 + a] = 0 + a;
        triangles[1 + a] = 1 + a;
        triangles[2 + a] = 2 + a;

        mesh.vertices = vertices;
        mesh.normals = normals;
        mesh.triangles = triangles;

        mf = GetComponent<MeshFilter>();
        mf.mesh = mesh;
        Instantiate(node, vec1, transform.rotation);
        Instantiate(node, vec2, transform.rotation);
        Instantiate(node, vec3, transform.rotation);

    }

    float GetDir(Vector2 pos)
    {
        if (pos.y < 0)
        {
            return (Mathf.Atan(pos.x / pos.y) + 180f);
        }
        else
        {
            return (Mathf.Atan(pos.x / pos.y) + 0f);
        }
    }

    void AddMesh(Vector3 vec1, Vector3 vec2, Vector3 vec3)
    {
        grid.Add(vec1);
        grid.Add(vec2);
        grid.Add(vec3);
    }

    void LoadMeshs()
    {
        mesh = new Mesh();
        vertices = new Vector3[grid.Count];
        normals = new Vector3[grid.Count];
        triangles = new int[grid.Count];

        i = 0;
        for (int a = 0; a <= grid.Count / 3; a++)
        {
            i++;
            if (i - 1 < grid.Count / 3)
            {
                BuildMesh(grid[i*3-3], grid[i*3-2], grid[i*3-1], false);
            }
        }
    }

    void ClearAll()
    {
        GetComponent<MeshFilter>().mesh.Clear(false);
    }
}

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.

2

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

3

yes but after that I do LoadMeshs which will use the grid to load them

4

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.