Is there a script to merge terrain tiles into one terrain?

Questions & Answers
1

Hi,

is there a script to merge terrain tiles into one terrain? No stitching needed, just reconfigure tiling.

Kind Regards,
Skandy

2

Here a script i wrote to merge the heightmaps of 256 terrains into a single terrain heightmap.
using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEngine;
using UnityEditor;

[ExecuteInEditMode]
public class CreateBigTerrain : MonoBehaviour
{
	
	public Terrain _bigTerrain;
	public Terrain _tiles;
	public TerrainData tData;
	public RenderTexture tileHeightmap;
	public RenderTexture newHeightmap;
	public bool active=true;
	private int progressId;
	
	IEnumerator Start()
	{
		if(active)
		{
			// Create a new progress indicator
			progressId = Progress.Start("Merging Terrain");
			
			yield return StartCoroutine("Calculate");

			// The task is finished. Remove the associated progress indicator.
			Progress.Remove(progressId);
			active=false;	
			StopAllCoroutines();
		}
		DestroyImmediate(this);

	}

	IEnumerator Calculate()
	{
		TerrainData terrainData; 
		string path; 
		bool flipVertical=false;
		Vector2 inputLevelsRange;
		
		//_bigTerrain = GameObject.Find("bigTerrain").GetComponent<Terrain>();
		
		int heightmapWidth = 1024;
		int heightmapHeight = 1024;

		float normalize = (1 << 16);
		byte[] data = new byte[4096 * 4096 * 2];
		
		for(int y=0; y<16; y++)
		{
			for(int x=0; x<16; x++)
			{
				_tiles = GameObject.Find("Terrain_"+x+"_"+y+"-20210513 - 125829").GetComponent<Terrain>();
						
				tData = _tiles.terrainData;

				float[,] heights = tData.GetHeights(0, 0, 1024, 1024);


				for (int ty = 0; ty < 256; ++ty)
				{
					for (int tx = 0; tx < 256; ++tx)
					{
						int index = (x*256+tx)+(y*256+ty)*4096; //tx*4 + ty*4 * 1024;
						//int srcY = flipVertical ? 1024 - 1 - y : y;

						float remappedHeight = heights[ty*4, tx*4];// * (inputLevelsRange.y - inputLevelsRange.x) + inputLevelsRange.x;

						int height = Mathf.RoundToInt(remappedHeight * normalize);
						ushort compressedHeight = (ushort)Mathf.Clamp(height, 0, ushort.MaxValue);

						byte[] byteData = System.BitConverter.GetBytes(compressedHeight);

						data[index * 2 + 0] = byteData[0];
						data[index * 2 + 1] = byteData[1];
					}
				}				
				
				
				yield return new WaitForSeconds(0.1f);

					
				Progress.Report(progressId, x+16*y, 256,"Heightmap of Terrain_"+x+"_"+y+"-20210513 - 125829");
			}	    	
		}
		


		path="Assets/Heightmaps/bigTerrain";
		

		FileStream fs = new FileStream((path + ".raw"), FileMode.Create);
		fs.Write(data, 0, data.Length);
		fs.Close();

		yield return null;
	}

	// Update is called once per frame
	void Update()
	{

	}

}