started working on Building rework

Assets/Buildings/Scripts/BuildingPlacement.cs

@@ -0,0 +1,35 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class BuildingPlacement : MonoBehaviour
+{
+    [SerializeField] private GameObject terrain;
+    [SerializeField] private GameObject prefab;
+
+    Ray ray;
+    private Canvas hud;
+
+    private void Start()
+    {
+        hud = GameObject.Find("HUD").GetComponent<Canvas>();
+    }
+
+    void Update()
+    {
+        // Build Button Handler
+        if (Input.GetButtonDown("Build"))
+        { // Wenn man den Button 'B'
+             //Get HUD Canvas
+            hud.enabled = false; //Hide HUD
+
+            ray = Camera.main.ScreenPointToRay(Input.mousePosition);
+            RaycastHit hitData;
+            if (terrain.GetComponent<Collider>().Raycast(ray, out hitData, Mathf.Infinity))
+            {
+                Instantiate(prefab, hitData.point, Quaternion.identity);
+
+            }
+        }
+    }
+}