This question was closed Dec 11, 2017 at 06:24 PM by NEGATIVERAGDOLL.

Question by NEGATIVERAGDOLL · Dec 07, 2017 at 05:47 AM · c#terrain object spawning

Random object placing parameters

Hello, so i got this script and it is amazing but I would like to add something so that the objects don't spawn in certain areas. I am unsure on how to do this, here is the script.

 using UnityEngine;
 using System.Collections;
 public class RandomObjects : MonoBehaviour
 {
 public Terrain terrain;
 public int numberOfObjects; // number of objects to place
 private int currentObjects; // number of placed objects
 public GameObject objectToPlace; // GameObject to place
 private int terrainWidth; // terrain size (x)
 private int terrainLength; // terrain size (z)
 private int terrainPosX; // terrain position x
 private int terrainPosZ; // terrain position z
 void Start()
 {
 // terrain size x
 terrainWidth = (int)terrain.terrainData.size.x;
 // terrain size z
 terrainLength = (int)terrain.terrainData.size.z;
 // terrain x position
 terrainPosX = (int)terrain.transform.position.x;
 // terrain z position
 terrainPosZ = (int)terrain.transform.position.z;
 }
 // Update is called once per frame
 void Update()
 {
 // generate objects
 if(currentObjects <= numberOfObjects)
 {
 // generate random x position
 int posx = Random.Range(terrainPosX, terrainPosX + terrainWidth);
 // generate random z position
 int posz = Random.Range(terrainPosZ, terrainPosZ + terrainLength);
 // get the terrain height at the random position
 float posy = Terrain.activeTerrain.SampleHeight(new Vector3(posx, 0, posz));
 // create new gameObject on random position
 GameObject newObject = (GameObject)Instantiate(objectToPlace, new Vector3(posx, posy, posz), Quaternion.identity);
 currentObjects += 1;
 }
 if(currentObjects == numberOfObjects)
 {
 Debug.Log("Generate objects complete!");
 }
 }
 }

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Ghujelk · Dec 07, 2017 at 06:55 AM 0

As it is now, you are sampling positions from the entire width x and depth z to create the location used to instantiate. For instance, If you were trying to exclude spawning objects on the edges you could alter the range of values your Random.Range is returning, something like; Random.Range(terrainPosX + DistanceFromLeftSideToNotSpawn, terrainPosX + terrainWidth - DistanceFromRightSideToNotSpawn) with those distance variables being integers. How are you trying to define your regions to not spawn in?