Made buildings unable to overlap

Assets/Prefabs/Buildings/FanBuilding.prefab

@@ -12,6 +12,7 @@ GameObject:
   - component: {fileID: 3321531399837876958}
   - component: {fileID: 512124502862012575}
   - component: {fileID: 2938597077917375806}
+  - component: {fileID: -6667291122109179156}
   m_Layer: 0
   m_Name: FanBuilding
   m_TagString: Untagged
@@ -90,3 +91,48 @@ MonoBehaviour:
   m_FillOrigin: 0
   m_UseSpriteMesh: 0
   m_PixelsPerUnitMultiplier: 1
+--- !u!61 &-6667291122109179156
+BoxCollider2D:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 8624048914473773482}
+  m_Enabled: 1
+  m_Density: 1
+  m_Material: {fileID: 0}
+  m_IncludeLayers:
+    serializedVersion: 2
+    m_Bits: 0
+  m_ExcludeLayers:
+    serializedVersion: 2
+    m_Bits: 0
+  m_LayerOverridePriority: 0
+  m_ForceSendLayers:
+    serializedVersion: 2
+    m_Bits: 4294967295
+  m_ForceReceiveLayers:
+    serializedVersion: 2
+    m_Bits: 4294967295
+  m_ContactCaptureLayers:
+    serializedVersion: 2
+    m_Bits: 4294967295
+  m_CallbackLayers:
+    serializedVersion: 2
+    m_Bits: 4294967295
+  m_IsTrigger: 0
+  m_UsedByEffector: 0
+  m_UsedByComposite: 0
+  m_Offset: {x: 0, y: 0}
+  m_SpriteTilingProperty:
+    border: {x: 0, y: 0, z: 0, w: 0}
+    pivot: {x: 0, y: 0}
+    oldSize: {x: 0, y: 0}
+    newSize: {x: 0, y: 0}
+    adaptiveTilingThreshold: 0
+    drawMode: 0
+    adaptiveTiling: 0
+  m_AutoTiling: 0
+  serializedVersion: 2
+  m_Size: {x: 40, y: 120}
+  m_EdgeRadius: 0

Assets/Scenes/SampleScene.unity

@@ -1304,9 +1304,9 @@ RectTransform:
   - {fileID: 2112507919}
   - {fileID: 2026916298}
   - {fileID: 96288173}
+  - {fileID: 2005593404}
   - {fileID: 1330313875}
   - {fileID: 1194686691}
-  - {fileID: 2005593404}
   m_Father: {fileID: 0}
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
@@ -1641,7 +1641,7 @@ MonoBehaviour:
   RectTransform: {fileID: 1330313875}
   BuildingPreview: {fileID: 1194686692}
   CursorImage: {fileID: 1330313876}
-  BuildingManager: {fileID: 0}
+  BuildingManager: {fileID: 2005593405}
   BuildingPrefab: {fileID: 8624048914473773482, guid: 1b5c88b3f8d08674a9b15155d6ba9a36,
     type: 3}
   CurrentMouseClickStrength: 0

Assets/Scripts/Game/Buildings/BuildingManager.cs

@@ -23,6 +23,7 @@ namespace Fruitomation.Game
 
         public bool AddBuildingAt(Vector2Int position, GameObject prefab, bool updateCellMap = false)
         {
+            //
             GameObject go = Instantiate(prefab, transform);
             BuildingInfo info = new
             (
@@ -33,11 +34,33 @@ namespace Fruitomation.Game
             Vector2Int p0 = position * 40;
             Vector2Int p1 = p0 + new Vector2Int(20, 100);
             
+            Vector2Int g0 = position + new Vector2Int(48, 24);
+            
             Vector2 off0 = info.Building.SizeOnGrid - Vector2.one;
             Vector2 off1 = off0 * 20;
 
             info.Rect.sizeDelta = info.Building.SizeOnGrid * 40;
             info.Rect.anchoredPosition = p1 + off1;
+            
+            Debug.Log(g0);
+            
+            //
+            for (int x = g0.x; x < g0.x + info.Building.SizeOnGrid.x; x++)
+            for (int y = g0.y; y < g0.y + info.Building.SizeOnGrid.y; y++)
+            {
+                if (InhabitedCells[x, y])
+                {
+                    DestroyImmediate(go);
+                    return false;
+                }
+            }
+            
+            //
+            for (int x = g0.x; x < g0.x + info.Building.SizeOnGrid.x; x++)
+            for (int y = g0.y; y < g0.y + info.Building.SizeOnGrid.y; y++)
+            {
+                InhabitedCells[x, y] = true;
+            }
 
             Buildings.Add(info);
             return true;