Creating Prefab Object on Grid System?

Questions & Answers
1

Hello,
i try to create a little game, and i´m a little bit confused.
I build up a Grid system, so you can build where ever you want. Also no problem…

But if i try to build a prefab object with a mouse click event, it doesn´t spawn, the object at the click point, i hope someone can help me.

using System;
using UnityEngine;

public class WallPlacer : MonoBehaviour {

    private Grid grid;
    RaycastHit hit;
    public GameObject prefab;
	
	private void Awake ()
    {
        grid = FindObjectOfType<Grid>();
	}
	
	private void Update ()
    {
	    if (Input.GetMouseButtonDown(0))
        {
            RaycastHit hitInfo;
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);

            if (Physics.Raycast(ray, out hitInfo))
            {
                PlaceWallNear(hitInfo.point);
            }

        }	
	}

    private void PlaceWallNear(Vector3 clickPoint)
    {
        var finalPosition = grid.GetNearestPointOnGrid(clickPoint);
       GameObject obj = Instantiate(prefab, prefab.transform.position, prefab.transform.rotation) as GameObject;
        
    }
}
2

To spawn a prefab at the mouse’s position, use this as the Vector3 position in Instantiate:

Camera.main.ScreenToWorldPoint(Input.mousePosition)