Seamless tiled infinite terrain: simple script for easy fix of seams and edit

Create a c# script named "SwapTerrain.cs" and paste the following code:

SwapTerrain.cs

Code (CSharp):

1. // This script make your terrain good for use with "infiniteTerrain.cs".
2. // Add this to the Terrain and click the "Swap" button in the Inspector to swap
3. // the borders of the heightmap so you can edit and smooth as needed.
4. // Hit "Swap" again and you can test it.
5. // To only make the infinite terrain seamless, just swap it twice.
6.  
7. using UnityEngine;
8. using System.Collections;
9.  
10. [ExecuteInEditMode]
11. public class SwapTerrain : MonoBehaviour
12. {
13.     public bool swap = false;
14.  
15.     void Update ()
16.     {
17.         if(swap)
18.         {
19.             Swap (gameObject.GetComponent<Terrain> ());
20.             swap = false;
21.         }
22.     }
23.  
24.     void Swap (Terrain terrain)
25.     {
26.         TerrainData data = terrain.terrainData;
27.  
28.         // Get the left and right half of the heightmap...
29.         float[,] h1 = data.GetHeights (0, 0, data.heightmapWidth / 2+1, data.heightmapHeight);
30.         float[,] h2 = data.GetHeights (data.heightmapWidth / 2, 0, data.heightmapWidth / 2+1, data.heightmapHeight);
31.  
32.         // ... and swap them
33.         data.SetHeights (0, 0, h2);
34.         data.SetHeights (data.heightmapWidth / 2, 0, h1);
35.  
36.         // Get the upper and lower half of the heightmap...
37.         float[,] v1 = data.GetHeights (0, 0, data.heightmapWidth, data.heightmapHeight / 2+1);
38.         float[,] v2 = data.GetHeights (0, data.heightmapHeight / 2, data.heightmapWidth, data.heightmapHeight / 2+1);
39.  
40.         // ... and swap them
41.         data.SetHeights (0, 0, v2);
42.         data.SetHeights (0, data.heightmapWidth / 2, v1);
43.     }
44. }

 

Is the infinite terrain cs. script from youtube.Because that is the one I use.I only wish it had a way to randomly generate postions for houses, trees,hills,rocks and spawn points for enemies.But it would need to space them.

 

Yes. It's the first entry when you google "infinite terrain".
This is the link to the script: http://answers.unity3d.com/storage/attachments/1978-infiniteterrain.zip

When you use it with non flat terrain it leave holes between edges. Usually you can fix it by exporting, editing the raw heightmap with Photoshop and reimporting it. With my script you simply edit the terrain in the Unity editor.