Prevent randomGenerated Structures from colliding / clipping

Questions & Answers
1

hello i have a random generation script that random generates all the structures and the world. But sometimes the structures collide with each other, (spawning inside of each other). How do i prevent this?
Thanks

here is one of my random generation scripts:

using UnityEngine;
using System.Collections;

public class GenerateTrees2 : MonoBehaviour
{
	//HouseDetails
	public GameObject Tree;
	public int z;
	public int x;
	public int SpawnTimer = 30;
	public int rotationY;
	public int rotationZ;
	public Quaternion randomRotation;
	
	void Start ()
	{
		while (SpawnTimer > 0)
		{
			//RandomRotation
			int rotationZ = Random.Range(-500, 500);
			int rotationY = Random.Range(-500, 500);
			int rotationX = 0;
			
			//RandomPosition
			int z = Random.Range (-75, 75);
			int x = Random.Range (-75, 75);
			int y = -2;
			
			Vector3 housePosHere = new Vector3 (x, y, z);
			
			//Rotation
			randomRotation = Quaternion.Euler(0, Random.Range(0, 360), 0);
			
			//LastFixes
			SpawnTimer--;
			Instantiate (Tree, housePosHere, randomRotation);
		}
	}
}
2

Do something like this:

using UnityEngine;
using System.Linq;

public class GenerateTrees2 : MonoBehaviour
{
    //HouseDetails
    public GameObject Tree;
    public int z;
    public int x;
    public int SpawnTimer = 30;
    public int rotationY;
    public int rotationZ;
    public Quaternion randomRotation;

    // Change this value to the desired detection radius
    public float DetectionRadius = 1;

    protected void Start()
    {
        // You do not want a while loop like this in your main thread, please make use of coroutines, as for the recursvie method beneath!
        while (SpawnTimer > 0)
        {
            SpawnRandomTree();
        }
    }

    protected void SpawnRandomTree()
    {
        //RandomPosition
        int z = Random.Range(-75, 75);
        int x = Random.Range(-75, 75);
        int y = -2;
        Vector3 housePosHere = new Vector3(x, y, z);

        //Rotation
        randomRotation = Quaternion.Euler(0, Random.Range(0, 360), 0);

        //LastFixes
        SpawnTimer--;

        // Make sure there is s "TreeScript" script attached to each Tree ;-)
        RaycastHit[] hits = Physics.SphereCastAll(housePosHere, DetectionRadius, transform.up);
        if (hits.FirstOrDefault(t => t.collider.GetComponent<TreeScript>()) == null)
        {
            Instantiate(Tree, housePosHere, randomRotation);
        }
        else
        {
            SpawnRandomTree();
        }
    }
}