snap to grid

Assets/Prefabs/Anchor.prefab

@@ -27,7 +27,7 @@ Transform:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 1824742176375353076}
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
-  m_LocalPosition: {x: 0.5, y: 0.5, z: 0}
+  m_LocalPosition: {x: 0.5, y: 0.5, z: -1}
   m_LocalScale: {x: 0.5, y: 0.5, z: 1}
   m_Children: []
   m_Father: {fileID: 0}

Assets/Prefabs/Cable.prefab

@@ -26,7 +26,7 @@ Transform:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 2180376356050932351}
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
-  m_LocalPosition: {x: 0, y: 0, z: 0}
+  m_LocalPosition: {x: 0, y: 0, z: -0.5}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_Children: []
   m_Father: {fileID: 0}

Assets/Prefabs/Gates/NAND gate.prefab

@@ -32,6 +32,7 @@ Transform:
   - {fileID: 118974315500811181}
   - {fileID: 555726995092159938}
   - {fileID: 120012632069647147}
+  - {fileID: 1658337153186624383}
   m_Father: {fileID: 0}
   m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
@@ -139,6 +140,85 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 419a02bb4cfe59848a1f7677a1018aa3, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
+--- !u!1 &5358625439717083291
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 1658337153186624383}
+  - component: {fileID: 5623837103916873807}
+  - component: {fileID: 2169103976044701791}
+  m_Layer: 0
+  m_Name: box
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!4 &1658337153186624383
+Transform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 5358625439717083291}
+  m_LocalRotation: {x: -0, y: -0, z: -0, w: 1}
+  m_LocalPosition: {x: 3, y: -2.5, z: 1}
+  m_LocalScale: {x: 5.5, y: 4.5, z: 1}
+  m_Children: []
+  m_Father: {fileID: 2070848596161447923}
+  m_RootOrder: 4
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
+--- !u!61 &5623837103916873807
+BoxCollider2D:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 5358625439717083291}
+  m_Enabled: 1
+  m_Density: 1
+  m_Material: {fileID: 0}
+  m_IsTrigger: 1
+  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: 1, y: 1}
+  m_EdgeRadius: 0
+--- !u!50 &2169103976044701791
+Rigidbody2D:
+  serializedVersion: 4
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 5358625439717083291}
+  m_BodyType: 1
+  m_Simulated: 1
+  m_UseFullKinematicContacts: 0
+  m_UseAutoMass: 0
+  m_Mass: 1
+  m_LinearDrag: 0
+  m_AngularDrag: 0.05
+  m_GravityScale: 0
+  m_Material: {fileID: 0}
+  m_Interpolate: 0
+  m_SleepingMode: 1
+  m_CollisionDetection: 0
+  m_Constraints: 0
 --- !u!1001 &14861468116553427
 PrefabInstance:
   m_ObjectHideFlags: 0
@@ -251,7 +331,7 @@ PrefabInstance:
       objectReference: {fileID: 0}
     - target: {fileID: 8599692958760628507, guid: d2ad1e1266d8af64ca87541a40be7e9f, type: 3}
       propertyPath: m_LocalPosition.z
-      value: 0
+      value: -1
       objectReference: {fileID: 0}
     - target: {fileID: 8599692958760628507, guid: d2ad1e1266d8af64ca87541a40be7e9f, type: 3}
       propertyPath: m_LocalRotation.w
@@ -321,7 +401,7 @@ PrefabInstance:
       objectReference: {fileID: 0}
     - target: {fileID: 8599692958760628507, guid: d2ad1e1266d8af64ca87541a40be7e9f, type: 3}
       propertyPath: m_LocalPosition.z
-      value: 0
+      value: -1
       objectReference: {fileID: 0}
     - target: {fileID: 8599692958760628507, guid: d2ad1e1266d8af64ca87541a40be7e9f, type: 3}
       propertyPath: m_LocalRotation.w
@@ -395,7 +475,7 @@ PrefabInstance:
       objectReference: {fileID: 0}
     - target: {fileID: 8599692958760628507, guid: d2ad1e1266d8af64ca87541a40be7e9f, type: 3}
       propertyPath: m_LocalPosition.z
-      value: 0
+      value: -1
       objectReference: {fileID: 0}
     - target: {fileID: 8599692958760628507, guid: d2ad1e1266d8af64ca87541a40be7e9f, type: 3}
       propertyPath: m_LocalRotation.w

Assets/Scripts/MouseManager.cs

@@ -1,5 +1,6 @@
 using System.Collections;
 using System.Collections.Generic;
+using System.Linq;
 using UnityEngine;
 
 namespace UntitledLogicGame
@@ -20,6 +21,7 @@ namespace UntitledLogicGame
 
         private Cable _currentCable;
         private Gate _currentGate;
+        private Vector3 _currentGateInitialPos;
         private Vector3 _currentGateDelta;
 
         #endregion
@@ -31,7 +33,7 @@ namespace UntitledLogicGame
             
         }
 
-        private void Update()
+        private void FixedUpdate()
         {
             var mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
             mousePos.z = 0f;
@@ -54,7 +56,8 @@ namespace UntitledLogicGame
                     {
                         _currentGate = GameManager.Instance.CurrentGate;
                         _currentGateDelta = MousePos - _currentGate.transform.position;
-                        foreach(var renderer in _currentGate.GetComponentsInChildren<SpriteRenderer>())
+                        _currentGateInitialPos = _currentGate.transform.position;
+                        foreach (var renderer in _currentGate.GetComponentsInChildren<SpriteRenderer>())
                         {
                             renderer.sortingLayerName = "moving";
                         }
@@ -79,6 +82,13 @@ namespace UntitledLogicGame
                 {
                     renderer.sortingLayerName = "default";
                 }
+                _currentGate.transform.position = _currentGate.transform.position.Round();
+                var currentBox = _currentGate.GetComponentInChildren<BoxCollider2D>();
+                if (FindObjectsOfType<Gate>()
+                    .Where(g => !g.Equals(_currentGate))
+                    .Select(g => g.GetComponentInChildren<BoxCollider2D>())
+                    .Any(b => currentBox.IsTouching(b))) // Collision with another gate
+                    _currentGate.transform.position = _currentGateInitialPos; // Reset pos
                 _currentGate = null;
             }
         }

Assets/Scripts/Utils.cs

@@ -51,5 +51,10 @@ namespace UntitledLogicGame
         {
             return array.Select((v, i) => (v ? 1 : 0) << (array.Length - i - 1)).Sum();
         }
+
+        public static Vector3 Round(this Vector3 v)
+        {
+            return new Vector3(Mathf.Round(v.x), Mathf.Round(v.y), Mathf.Round(v.z));
+        }
     }
 }

ProjectSettings/TagManager.asset

@@ -14,7 +14,7 @@ TagManager:
   - 
   - 
   - Background Image
-  - 
+  - test
   - 
   - 
   -