Creating Procedural Terrain With Netcode

Unity Engine
,
1

As the title says, I’m trying to make procedurally generated terrain with netcode, and just can’t figure out how to do it. This is my code:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Unity.Netcode;

public class MeshGenerator : NetworkBehaviour
{
    Mesh mesh;

    Vector3[] vertices;
    int[] triangles;

    public int xSize = 40;
    public int zSize = 40;
    public int Scale = 20;
    public Vector2 maxMinOffset;

    public void Start()
    {

        mesh = new Mesh();
        mesh.indexFormat = UnityEngine.Rendering.IndexFormat.UInt32;
        GetComponent<MeshFilter>().mesh = mesh;
        this.gameObject.AddComponent<MeshCollider>().sharedMesh = mesh;
        GetComponent<MeshCollider>().convex = true;

        CreateShape();
        UpdateMesh();


    }

    void CreateShape()
    {
       
        vertices = new Vector3[(xSize + 1) * (zSize + 1)];


        for (int i = 0, z = 0; z <= zSize; z++)
        {
            for (int x = 0; x <= xSize; x++)
            {

                float scaleY = Random.Range(maxMinOffset.x, maxMinOffset.y);
                float y = Mathf.PerlinNoise(x * scaleY, z * scaleY);
                vertices[i] = new Vector3(x * Scale, y * Scale, z * Scale);
                i++;
            }
        }

        int vert = 0;
        int tris = 0;
        triangles = new int[xSize * zSize * 6];

        for (int z = 0; z < zSize; ++z)
        {
            for (int x = 0; x < xSize; x++)
            {
                triangles[tris + 0] = vert + 0;
                triangles[tris + 1] = vert + xSize + 1;
                triangles[tris + 2] = vert + 1;
                triangles[tris + 3] = vert + 1;
                triangles[tris + 4] = vert + xSize + 1;
                triangles[tris + 5] = vert + xSize + 2;

                vert++;
                tris += 6;
            }
            vert++;
        }
    }


    void UpdateMesh()
    {
        mesh.Clear();

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

        mesh.RecalculateNormals();

        GetComponent<MeshCollider>().convex = false;
    }
}

I’m just trying to find out how to generate the world on the hosts side, and not create multiple worlds.

2

Procedural worlds rely on seeds. Server/Host shares the seed with clients and each client generates their own copy of this world with respect to seed coming from the host. You should sync objects that can be affected by the players such as trees, rocks etc if you would like to harvest them to give an example.

3

I’m assuming my variable “scaleY” would be the seed(In the CreateShape meathod), but how would I only set this on the host/servers side.(As you can probably tell, I’m pretty new to Netcode)