Started adding preview for building buildings

Assets/Scenes/SampleScene.unity

@@ -1305,6 +1305,7 @@ RectTransform:
   - {fileID: 2026916298}
   - {fileID: 96288173}
   - {fileID: 1330313875}
+  - {fileID: 1194686691}
   m_Father: {fileID: 0}
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
@@ -1312,6 +1313,81 @@ RectTransform:
   m_AnchoredPosition: {x: 0, y: 0}
   m_SizeDelta: {x: 0, y: 0}
   m_Pivot: {x: 0, y: 0}
+--- !u!1 &1194686690
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 1194686691}
+  - component: {fileID: 1194686693}
+  - component: {fileID: 1194686692}
+  m_Layer: 5
+  m_Name: BuildingPreview
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!224 &1194686691
+RectTransform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1194686690}
+  m_LocalRotation: {x: -0, y: -0, z: -0, w: 1}
+  m_LocalPosition: {x: 0, y: 0, z: 0}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_ConstrainProportionsScale: 0
+  m_Children: []
+  m_Father: {fileID: 1165634414}
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
+  m_AnchorMin: {x: 0.5, y: 0.5}
+  m_AnchorMax: {x: 0.5, y: 0.5}
+  m_AnchoredPosition: {x: 0, y: 0}
+  m_SizeDelta: {x: 40, y: 40}
+  m_Pivot: {x: 0.5, y: 0.5}
+--- !u!114 &1194686692
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1194686690}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: fe87c0e1cc204ed48ad3b37840f39efc, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  m_Material: {fileID: 0}
+  m_Color: {r: 1, g: 1, b: 1, a: 1}
+  m_RaycastTarget: 0
+  m_RaycastPadding: {x: 0, y: 0, z: 0, w: 0}
+  m_Maskable: 1
+  m_OnCullStateChanged:
+    m_PersistentCalls:
+      m_Calls: []
+  m_Sprite: {fileID: 0}
+  m_Type: 0
+  m_PreserveAspect: 0
+  m_FillCenter: 1
+  m_FillMethod: 4
+  m_FillAmount: 1
+  m_FillClockwise: 1
+  m_FillOrigin: 0
+  m_UseSpriteMesh: 0
+  m_PixelsPerUnitMultiplier: 1
+--- !u!222 &1194686693
+CanvasRenderer:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1194686690}
+  m_CullTransparentMesh: 1
 --- !u!1 &1314545342
 GameObject:
   m_ObjectHideFlags: 0
@@ -1516,7 +1592,7 @@ MonoBehaviour:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 1330313874}
-  m_Enabled: 0
+  m_Enabled: 1
   m_EditorHideFlags: 0
   m_Script: {fileID: 11500000, guid: fe87c0e1cc204ed48ad3b37840f39efc, type: 3}
   m_Name: 
@@ -1562,6 +1638,12 @@ MonoBehaviour:
   ActiveCamera: {fileID: 330585545}
   CursorCollider: {fileID: 1330313879}
   RectTransform: {fileID: 1330313875}
+  BuildingPreview: {fileID: 1194686692}
+  CursorImage: {fileID: 1330313876}
+  BuildingPrefab: {fileID: 8624048914473773482, guid: 1b5c88b3f8d08674a9b15155d6ba9a36,
+    type: 3}
+  CurrentMouseClickStrength: 0
+  GridPosition: {x: 0, y: 0}
 --- !u!58 &1330313879
 CircleCollider2D:
   m_ObjectHideFlags: 0

Assets/Scripts/Game/Buildings/BuildingBase.cs

@@ -7,5 +7,7 @@ namespace Fruitomation.Game
         [Header("Building Properties")]
         [SerializeField] private Texture2D BuildingTexture;
         [field: SerializeField] public Vector2Int SizeOnGrid { get; private set; }
+        
+        public Texture2D Texture => BuildingTexture;
     }
 }

Assets/Scripts/UI/GameCursor.cs

@@ -1,21 +1,35 @@
-using System;
+using PashaBibko.Pacore.Attributes;
 using System.Collections.Generic;
+using Fruitomation.Global;
 using Fruitomation.Game;
+using UnityEngine.UI;
 using UnityEngine;
+using System;
 
 namespace Fruitomation.UI
 {
     public class GameCursor : MonoBehaviour
     {
+        private const float MIN_STRENGTH = 0.5f;
+        private const float MAX_STRENGTH = 1.7f;
+        
         [Header("References")]
         [SerializeField] private Camera ActiveCamera;
         [SerializeField] private CircleCollider2D CursorCollider;
         [SerializeField] private RectTransform RectTransform;
+        [SerializeField] private Image BuildingPreview;
+        [SerializeField] private Image CursorImage;
+        
+        [Header("Dev")]
+        [SerializeField] private GameObject BuildingPrefab;
+
+        [Header("Read Only")]
+        [SerializeField, InspectorReadOnly] private float CurrentMouseClickStrength;
+        [SerializeField, InspectorReadOnly] private Vector2Int GridPosition;
 
         private readonly ContactFilter2D ContactFilter = new();
         private readonly List<Collider2D> Colliders = new();
         
-        private float CurrentMouseClickStrength;
         private float StartOfMouseClick;
         
         private void UpdatePosition()
@@ -27,9 +41,55 @@ namespace Fruitomation.UI
             transform.position = position;
         }
 
-        private void UpdateMouseState()
+        private void CalculateGridPosition()
         {
-            const float MIN_STRENGTH = 0.5f;
+            Vector2 p0 = RectTransform.anchoredPosition;
+            Vector2 p1 = p0 - new Vector2(0, 100f); // Offset of the grid from the middle of the screen
+            Vector2 p2 = p1 / 40f;
+            Vector2 p3 = p2 + new Vector2(48f, 24f); // Half size of the grid
+            Vector2Int p4 = Vector2Int.FloorToInt(p3);
+            GridPosition = new Vector2Int
+            (
+                Math.Clamp(p4.x, 0, 95), // size.x - 1
+                Math.Clamp(p4.y, 0, 48) // size.y - 1
+            );
+        }
+
+        private void Update()
+        {
+            UpdatePosition();
+            
+            CurrentMouseClickStrength = MIN_STRENGTH;
+            switch (GameStateController.State)
+            {
+                case GameState.Simulation:
+                    UpdateMouseStateSimulation();
+                    break;
+                 
+                case GameState.Building:
+                    UpdateMouseStateBuilding();
+                    break;
+                
+                case GameState.UpgradeMenu:
+                case GameState.Paused:
+                case GameState.Default:
+                    break; // No extra logic needed
+
+                default:
+                    throw new ArgumentOutOfRangeException();
+            }
+            
+            CurrentMouseClickStrength = Mathf.Clamp(CurrentMouseClickStrength, MIN_STRENGTH, MAX_STRENGTH);
+            
+            CalculateGridPosition();
+
+            RectTransform.localScale = new Vector3(CurrentMouseClickStrength, CurrentMouseClickStrength, 1f);
+        }
+        
+        private void UpdateMouseStateSimulation()
+        {
+            CursorImage.enabled = true;
+            BuildingPreview.enabled = false;
             
             if (Input.GetMouseButtonUp(0))
             {
@@ -43,7 +103,7 @@ namespace Fruitomation.UI
                     if (col.transform.name == "Sprite")
                     {
                         FruitBehaviour fruit = col.GetComponentInParent<FruitBehaviour>();
-                        Debug.Assert(fruit != null, "Couldn't find FruitBehaviour");
+                        Debug.Assert(fruit, "Couldn't find FruitBehaviour");
                         
                         fruit.TriggerDestruction();
                     }
@@ -60,7 +120,6 @@ namespace Fruitomation.UI
                 }
                 
                 CurrentMouseClickStrength = Time.time - StartOfMouseClick;
-                CurrentMouseClickStrength = Mathf.Clamp(CurrentMouseClickStrength, MIN_STRENGTH, 1.7f);
             }
 
             else
@@ -69,28 +128,25 @@ namespace Fruitomation.UI
             }
         }
 
-        private void CalculateGridPosition()
+        private void UpdateMouseStateBuilding()
         {
-            Vector2 p0 = RectTransform.anchoredPosition;
+            CursorImage.enabled = false;
-            Vector2 p1 = p0 - new Vector2(0, 100f); // Offset of the grid from the middle of the screen
+            BuildingPreview.enabled = true;
-            Vector2 p2 = p1 / 40f;
-            Vector2 p3 = p2 + new Vector2(48f, 24f); // Half size of the grid
-            Vector2Int p4 = Vector2Int.FloorToInt(p3);
-            Vector2Int p5 = new
-            (
-                Math.Clamp(p4.x, 0, 95), // size.x - 1
-                Math.Clamp(p4.y, 0, 48) // size.y - 1
-            );
-            Debug.Log(p5);
-        }
             
-        private void Update()
+            //
+            Vector2Int p0 = GridPosition - new Vector2Int(48, 24);
+            Vector2Int p1 = p0 * 40;
+            Vector2Int p2 = p1 + new Vector2Int(20, 100);
+            BuildingPreview.rectTransform.anchoredPosition = p2;
+            
+            //
+            BuildingBase building = BuildingPrefab.GetComponent<BuildingBase>();
+            BuildingPreview.material = new Material(Shader.Find("UI/Default"))
             {
-            UpdateMouseState();
+                mainTexture = building.Texture
-            UpdatePosition();
+            };
-            CalculateGridPosition();
 
-            RectTransform.localScale = new Vector3(CurrentMouseClickStrength, CurrentMouseClickStrength, 1f);
+            BuildingPreview.rectTransform.sizeDelta = building.SizeOnGrid * 40;
         }
     }
 }