terrain noise

    void randomTerrain(Edit edit, Terrain terrain)
    {
        int xResolution = terrain.terrainData.heightmapWidth;
        int zResolution = terrain.terrainData.heightmapHeight;
        height = terrain.terrainData.GetHeights(0, 0, terrain.terrainData.heightmapWidth, terrain.terrainData.heightmapHeight);

        switch(edit)
        {
            case Edit.cosinoise:
                for (int z = 0; z < zResolution; z++)
                {
                    for (int x = 0; x < xResolution; x++)
                    {
                        float xSin = Mathf.Cos(x);
                        float zSin = -Mathf.Sin(z);
                        height[x, z] = (xSin - zSin) / 100;
                    }
                }
                break;
            case Edit.perlin:
                for (int z = 0; z < zResolution; z++)
                {
                    for (int x = 0; x < xResolution; x++)
                    {
                        height[x,z] = Mathf.PerlinNoise(((float)x / (float)terrain.terrainData.heightmapWidth) * noisesize, ((float)z / (float)terrain.terrainData.heightmapHeight) * noisesize) / 10.0f;
                    }
                }
                break;
        }

        terrain.terrainData.SetHeights(0, 0, height);
        for (int z = 0; z < zResolution; z++)
        {
            for (int x = 0; x < xResolution; x++)
            {
                chunk1.setTile(x, z, new Tile((int)height[x, z], 0));
            }
        }

    }

    public enum Edit
    {
        perlin,
        cosinoise
    }