koobas.hobune.stream
Duplicating Terrain at run-time
Hello everyone,
I'm trying here, unsuccessfully, to duplicate terrains in real-time.
I have 2 GameObjects, named "Terrain00" and "Terrain01". Each of them have a Terrain object, created dynamically from resources I get from a socket stream. I want now to, at certain event in my application, to remove Terrain00 terrain (but keeping the GameObject) and duplicate, or move, the terrain inside Terrain01.
I managed to get a instance of each terrain, managed to make a copy of the terrain with Instantiate, and even managed to delete the terrain in Terrain00, but I didn't found a way so far to insert the copied terrain in Terrain00.... All I could do so far is to create a new blank terrain with GameObject.AddComponent.... I'm trying to avoid to create a new terrain in Terrain00 and then export everything to my new terrain, as terrainData, terrainCollider, and so on.
Is there any way to do this?
There's no point trying to avoid copying everything over, because that's what you have to do. There isn't a Terrain.Copy function, but you can make one yourself fairly easily. (Terrain.CreateTerrainGameObject just links to an existing TerrainData, so it's not helpful here.)
Exactly what I wanted to avoid.... oh well, let's do it then. So nice if there was any method to simply duplicate terrains without having to build one =D I love to be lazy hehe
Just updating for future reference... I just duplicated my GameObject containing the Terrain, and everything inside it went along (Terrain, terraincollider, trees, parameters, splats, etc). Then I deleted my old gameobject and renamed it as my old object. This caused my terrain scripts to reset its attributes, so I had to save them in a global variable... maybe not the most elegant solution, but it worked perfectly.
Eric is correct, but I too enjoy being lazy.
I am setting up my height map and my splat map via code. Therefore, all I really need is a shallow copy of all the TerrainData properties that I setup in the designer.
I threw together this prototype and tested that it works.
To my fellow lazy coders, enjoy:
// this is garbage test code, but you get the idea
public class TerrainSpawner : MonoBehaviour {
public GameObject terrainPrefab;
// Use this for initialization
IEnumerator Start () {
GameObject terrainGameObject = (GameObject) Instantiate (terrainPrefab, new Vector3 (-1000.0F, 0.0F, -1000.0F), terrainPrefab.transform.rotation);
yield return new WaitForSeconds (5.0F); // waiting for 5 seconds so I can watch it spawn the 2nd terrain in the scene view while it's running
Terrain terrain = terrainPrefab.GetComponent<Terrain> ();
TerrainData terrainData = new TerrainData ();
CopyFrom (terrainData, terrain.terrainData); // copy the basic getable/setable properties
GameObject newTerrainGameObject = (GameObject) Instantiate (terrainPrefab, new Vector3 (-3000.0F, 0.0F, -1000.0F), terrainPrefab.transform.rotation);
Terrain newTerrain = newTerrainGameObject.GetComponent<Terrain> ();
newTerrain.terrainData = terrainData;
}
// previously an extension method
public static void CopyFrom<T1, T2>(T1 obj, T2 otherObject)
where T1: class
where T2: class
{
PropertyInfo[] srcFields = otherObject.GetType().GetProperties(
BindingFlags.Instance | BindingFlags.Public | BindingFlags.GetProperty);
PropertyInfo[] destFields = obj.GetType().GetProperties(
BindingFlags.Instance | BindingFlags.Public | BindingFlags.SetProperty);
foreach (var property in srcFields) {
var dest = destFields.FirstOrDefault(x => x.Name == property.Name);
if (dest != null && dest.CanWrite)
dest.SetValue(obj, property.GetValue(otherObject, null), null);
}
}
}
This is the ONLY solution found for cases where there's no explicitly saved terrainData asset. Super relevant for recovering complex terrains when the only thing remaining is a backup scene.
