started work on place obj

Assets/Scripts/Grid/Grid.cs

@@ -1,47 +1,66 @@
+using System;
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
-public class Grid
+public class Grid<TGridObject>
 {
     int width, height;
     float cellSize;
     Vector3 originPosition;
-    int[,] gridArray;
+    TGridObject[,] gridArray;
 
-    public Grid(int _width, int _height, float _cellSize, Vector3 _originPosition)
+    bool showDebug = true;
+
+    public int GetWidth() => width;
+    public int GetHeight() => height;
+    public float GetCellSize() => cellSize;
+
+    public Grid(int _width, int _height, float _cellSize, Vector3 _originPosition, Func<Grid<TGridObject>, int, int, TGridObject> createGridObject)
     {
         width = _width;
         height = _height;
         cellSize = _cellSize;
         originPosition = _originPosition;        
 
-        gridArray = new int[width, height];
+        gridArray = new TGridObject[width, height];
 
-        for(int x = 0; x < gridArray.GetLength(0); x++)
+        for (int x = 0; x < gridArray.GetLength(0); x++)
         {
             for (int y = 0; y < gridArray.GetLength(1); y++)
             {
-                Debug.DrawLine(GetWorldPosition(x, y), GetWorldPosition(x, y+1), Color.white, 100f);
-                Debug.DrawLine(GetWorldPosition(x, y), GetWorldPosition(x+1,y), Color.white, 100f);
+                gridArray[x, y] = createGridObject(this, x, y);
             }
         }
-        Debug.DrawLine(GetWorldPosition(0, height), GetWorldPosition(width, height), Color.white, 100f);
-        Debug.DrawLine(GetWorldPosition(width, 0), GetWorldPosition(width, height), Color.white, 100f);
+
+        if (showDebug)
+        {
+            for (int x = 0; x < gridArray.GetLength(0); x++)
+            {
+                for (int y = 0; y < gridArray.GetLength(1); y++)
+                {
+                    Debug.DrawLine(GetWorldPosition(x, y), GetWorldPosition(x, y + 1), Color.white, 100f);
+                    Debug.DrawLine(GetWorldPosition(x, y), GetWorldPosition(x + 1, y), Color.white, 100f);
+                }
+            }
+            Debug.DrawLine(GetWorldPosition(0, height), GetWorldPosition(width, height), Color.white, 100f);
+            Debug.DrawLine(GetWorldPosition(width, 0), GetWorldPosition(width, height), Color.white, 100f);
+        }
+        
     }
 
-    Vector3 GetWorldPosition(int x, int y)
+    public Vector3 GetWorldPosition(int x, int y)
     {
         return new Vector3(x, y) * cellSize + originPosition;
     }
 
-    void GetXY(Vector3 worldPosition, out int x, out int y)
+    public void GetXY(Vector3 worldPosition, out int x, out int y)
     {
         x = Mathf.FloorToInt((worldPosition - originPosition).x / cellSize);
         y = Mathf.FloorToInt((worldPosition - originPosition).y / cellSize);
     }
 
-    public void SetValue(int x, int y, int value)
+    public void SetGridObject(int x, int y, TGridObject value)
     {
         if(x >= 0 && y >= 0 && x < width && y < height)
         {
@@ -50,14 +69,14 @@ public class Grid
         }
     }
 
-    public void SetValue(Vector3 worldPosition, int value)
+    public void SetGridObject(Vector3 worldPosition, TGridObject value)
     {
         int x, y;
         GetXY(worldPosition, out x, out y);
-        SetValue(x, y, value);
+        SetGridObject(x, y, value);
     }
 
-    public int GetValue(int x, int y)
+    public TGridObject GetGridObject(int x, int y)
     {
         if (x >= 0 && y >= 0 && x < width && y < height)
         {
@@ -65,14 +84,14 @@ public class Grid
         }
         else
         {
-            return 0;
+            return default(TGridObject);
         }
     }
 
-    public int GetValue(Vector3 worldPosition)
+    public TGridObject GetGridObject(Vector3 worldPosition)
     {
         int x, y;
         GetXY(worldPosition, out x, out y);
-        return GetValue(x, y);
+        return GetGridObject(x, y);
     }
 }

Assets/Scripts/Grid/GridBuildingSystem.cs

@@ -0,0 +1,57 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class GridBuildingSystem : MonoBehaviour
+{
+    [SerializeField] Transform testTransform;
+
+    Grid<GridObject> grid;
+    void Awake()
+    {
+        int gridWidth = 20;
+        int gridHeight = 20;
+        float cellSize = 2f;
+
+        grid = new Grid<GridObject>(gridWidth, gridHeight, cellSize, Vector3.zero, (Grid<GridObject> g, int x, int y) => new GridObject(g, x, y));
+    }
+    public class GridObject
+    {
+        int x, y;
+        Grid<GridObject> grid;
+        Transform transform;
+        public GridObject(Grid<GridObject> _grid, int _x, int _y)
+        {
+            grid = _grid;
+            x = _x;
+            y = _y;
+        }
+        public void SetTransform(Transform _transform) => transform = _transform;
+        public Transform GetTransform() => transform;
+        public void ClearTransform() => transform = null;
+
+        public bool CanBuild()
+        {
+            return transform == null;
+        }
+    }
+    void Update()
+    {
+        if (Input.GetMouseButtonDown(0))
+        {
+            Vector3 mousePosition = new Vector3(Camera.main.ScreenToWorldPoint(Input.mousePosition).x, Camera.main.ScreenToWorldPoint(Input.mousePosition).y);
+            grid.GetXY(mousePosition, out int x, out int y);
+
+            GridObject gridObject = grid.GetGridObject(x, y);
+            if (gridObject.CanBuild())
+            {
+                Transform builtTransform = Instantiate(testTransform, grid.GetWorldPosition(x, y), Quaternion.identity);
+                gridObject.SetTransform(builtTransform);
+            }
+            else
+            {
+                Debug.Log("Cannot build here!" + " " + mousePosition);
+            }
+        }
+    }
+}

Assets/Scripts/Grid/GridBuildingSystem.cs.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 29730cb0d1ffeb247be75654297759f2
+guid: a9e8b2a885476754e9652c90137f91bc
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2

Assets/Scripts/Grid/PlacedObjectTypeSO.cs

@@ -0,0 +1,18 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class PlacedObjectTypeSO : MonoBehaviour
+{
+    // Start is called before the first frame update
+    void Start()
+    {
+        
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+        
+    }
+}

Assets/Scripts/Grid/PlacedObjectTypeSO.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: ed4c766e9f0dd454da548c672fa99b65
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Grid/TestGrid.cs

@@ -1,25 +0,0 @@
-using System.Collections;
-using System.Collections.Generic;
-using UnityEngine;
-
-public class TestGrid : MonoBehaviour
-{
-    Grid grid;
-    void Start()
-    {
-        grid = new Grid(100, 100, 1, new Vector3(0, 0));
-    }
-
-    void Update()
-    {
-        if (Input.GetMouseButtonDown(0))
-        {
-            grid.SetValue(Camera.main.ScreenToWorldPoint(Input.mousePosition), 44);
-        }
-
-        if (Input.GetMouseButtonDown(1))
-        {
-            Debug.Log(grid.GetValue(Camera.main.ScreenToWorldPoint(Input.mousePosition)));
-        }
-    }
-}