Terrain Generating and multithreading

Unity Engine
1

Got a question. I am working on a Voxel Engine for a game I’m working on. I have the voxel engine running good. I’ve created a Visual Node editor for generating the voxel terrain and I just over night multithreaded everything I possibly could. It’s running pretty smoothly. I am now adding new ways of generating the terrain and wanted to add in Height map support. I then remembered I can’t call any Unity API methods from threads other then the main thread. So I am now unable to call the get pixel method on the height map. What is the best way to add in Height map support with out using Unity’s built in methods?

2

I came up with the following which seems to work but is it the best way or is there a better way that I’m over looking?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using UnityEngine;

namespace LibNoise.Generator
{
    class Heightmap : ModuleBase
    {
        private Texture2D heightmap;

        Dictionary<Vector2, Color> pixels = new Dictionary<Vector2, Color>();
        private float width;
        private float height;
        private Vector2 Scale;

        public Heightmap(Texture2D h)
            : base(0)
        {
            if (h != null)
            {
                Scale = new Vector2(500, 500);
                heightmap = h;

                for (int x = 0; x < heightmap.width; x++)
                {
                    for (int z = 0; z < heightmap.height; z++)
                    {
                        pixels.Add(new Vector2(x, z), heightmap.GetPixel(x, z));
                    }
                }

                width = heightmap.width;
                height = heightmap.height;
            }
        }

        public override double GetValue(double x, double y, double z)
        {
            int _x = Mathf.FloorToInt((float)x / Scale.x * width);
            int _z = Mathf.FloorToInt((float)z / Scale.y * height);

            Vector2 pos = new Vector2(_x, _z);

            if (pixels.ContainsKey(pos))
                return pixels[pos].grayscale;

            return 0;
        }
    }
}