PopulateTerrainMap

void PopulateTerrainMap () {
        NoiseCube noise = new NoiseCube();
        // The data points for terrain are stored at the corners of our "cubes", so the terrainMap needs to be 1 larger
        // than the width/height of our mesh.
        for (int x = 0; x < width + 1; x++) {
            for (int z = 0; z < width + 1; z++) {
                for (int y = 0; y < height + 1; y++) {

                    // Get a terrain height using regular old Perlin noise.
                    float thisHeight = noise.Noise(x * scale, y * scale, z * scale);


                    // Set the value of this point in the terrainMap.
                    terrainMap[x, y, z] = thisHeight > threshold ? 1.0f : 0.0f;

                }
            }
        }
    }