Implement inventory slot switching in the inventory interface

Assets/Prefabs/NPC.prefab

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Assets/Prefabs/PC.prefab

@@ -4955,6 +4955,7 @@ MonoBehaviour:
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Assets/Scenes/TestMap.unity

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Assets/Scripts/Controls/InventoryInterface.cs

@@ -98,12 +98,22 @@ namespace Cyber.Controls {
         private List<Transform> ItemGridCells;
         private List<MeshFilter> ItemGridCellMeshes;
         private int ItemGridSelectedIndex;
+        private Transform GrabbedItem;
+        private int GrabbedItemIndex = -1;
 
         private Color IconInventoryColor;
         private Color IconStatusColor;
         private Color IconSocialColor;
         private Color IconMapColor;
 
+        /// <summary>
+        /// Whether the inventory is currently open and interactible.
+        /// </summary>
+        /// <returns><c>true</c> if this instance is open; otherwise, <c>false</c>.</returns>
+        public bool IsOpen() {
+            return InventoryOpen;
+        }
+
         private void Start() {
             int ItemGridSize = (int) ItemGridDimensions.x * (int) ItemGridDimensions.y;
             ItemGridCells = new List<Transform>(ItemGridSize);
@@ -138,11 +148,23 @@ namespace Cyber.Controls {
                 if (ItemGridCells.Contains(LookedAt.collider.transform)) {
                     // Interacting with the item list
                     CurrentIndex = int.Parse(LookedAt.collider.name.Split(' ')[1]);
+                    if (GrabbedItem == null) {
+                        // Nothing is currently being dragged, continue as normal
+                        if (Input.GetButton("Activate") && 
+                                (Input.GetAxis("Mouse X") != 0 || Input.GetAxis("Mouse Y") != 0) && 
+                                ItemGridSelectedIndex == CurrentIndex) {
+                            // This item has been selected for at least a frame, 
+                            // and the mouse is moving, this counts as dragging
+                            Debug.Log("Grabbed!");
+                            GrabbedItem = LookedAt.collider.transform;
+                            GrabbedItemIndex = CurrentIndex;
+                        }
                         if (Input.GetButtonDown("Activate") || Input.GetButtonDown("Equip")) {
+                            // Select things
                             ItemGridSelectedIndex = CurrentIndex;
                         }
                         if (Input.GetButtonDown("Equip")) {
-                        // Selected index was already this => equip (double-clicked)
+                            // Equip things
                             Item SelectedItem = Inventory.Drive.GetItemAt(ItemGridSelectedIndex);
                             if (SelectedItem != null) {
                                 Item Equipped = Inventory.Drive.GetSlot(SelectedItem.Slot);
@@ -155,6 +177,26 @@ namespace Cyber.Controls {
                                 }
                             }
                         }
+                    } else {
+                        // Something is grabbed, make things react to this
+                        if (Input.GetButtonUp("Activate")) {
+                            // Grab was released, drop item here
+                            // Lerp things
+                            ItemGridCellMeshes[GrabbedItemIndex].transform.position = ItemGridCells[CurrentIndex].position;
+                            ItemGridCellMeshes[CurrentIndex].transform.position = ItemGridCells[GrabbedItemIndex].position;
+                            Lerper.LerpTransformPosition(ItemGridCellMeshes[GrabbedItemIndex].transform, new Vector3(), 10f);
+                            Lerper.LerpTransformPosition(ItemGridCellMeshes[CurrentIndex].transform, new Vector3(), 10f);
+
+                            // Switch items
+                            Inventory.Drive.SwitchSlots(GrabbedItemIndex, CurrentIndex);
+
+                            // Reset grabbing
+                            GrabbedItem = null;
+                            GrabbedItemIndex = -1;
+                        } else {
+                            
+                        }
+                    }
                 } else if (Mesh != null) {
                     float InvBrightness = 1.1f;
                     float StsBrightness = 1f;

Assets/Scripts/Controls/PlayerController.cs

@@ -21,6 +21,11 @@ namespace Cyber.Controls {
         /// </summary>
         public Character Character;
 
+        /// <summary>
+        /// The inventory interface.
+        /// </summary>
+        public InventoryInterface InventoryInterface;
+
         /// <summary>
         /// The camera the player is seeing the world through.
         /// </summary>
@@ -77,7 +82,7 @@ namespace Cyber.Controls {
                 }
 
                 // Equipment actions
-                if (!Interacted) {
+                if (!Interacted && !InventoryInterface.IsOpen()) {
                     // Don't use equipment if you're interacting with something
                     // (ie. don't shoot at the buttons)
                     if (Input.GetButtonDown("Use Item (R)")) {

Assets/Scripts/Items/Drive.cs

@@ -104,6 +104,9 @@ namespace Cyber.Items {
         /// <param name="idx1">The first index.</param>
         /// <param name="idx2">The second index.</param>
         public void SwitchSlots(int idx1, int idx2) {
+            if (idx1 == idx2) {
+                return;
+            }
             Slot Slot1 = GetSlotAt(idx1);
             Slot Slot2 = GetSlotAt(idx2);
             SetSlotAt(idx1, Slot2);

Assets/Scripts/Util/Lerper.cs

@@ -0,0 +1,59 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Cyber.Util {
+
+    /// <summary>
+    /// Lerps stuff.
+    /// </summary>
+    public class Lerper : MonoBehaviour {
+        private struct PositionLerp {
+            public Vector3 Target;
+            public float Speed;
+
+            public PositionLerp(Vector3 target, float speed) {
+                Target = target;
+                Speed = speed;
+            }
+        }
+
+        private static Lerper Singleton;
+
+        private Dictionary<Transform, PositionLerp> PositionLerps = new Dictionary<Transform, PositionLerp>();
+
+        /// <summary>
+        /// Sets the singleton.
+        /// </summary>
+        public Lerper() {
+            Singleton = this;
+        }
+
+        /// <summary>
+        /// Lerps the transform local position.
+        /// </summary>
+        /// <param name="transform">Transform.</param>
+        /// <param name="to">To.</param>
+        /// <param name="speed">Speed.</param>
+        public static void LerpTransformPosition(Transform transform, Vector3 to, float speed) {
+            if (Singleton != null) {
+                Singleton.PositionLerps[transform] = new PositionLerp(to, speed);
+            }
+        }
+
+        private void Update() {
+            List<Transform> RemoveThese = new List<Transform>();
+            foreach (Transform Transform in PositionLerps.Keys) {
+                Transform.localPosition = Vector3.Lerp(Transform.localPosition, 
+                    PositionLerps[Transform].Target, PositionLerps[Transform].Speed * Time.deltaTime);
+                if ((Transform.localPosition - PositionLerps[Transform].Target).magnitude < 0.001f) {
+                    Transform.localPosition = PositionLerps[Transform].Target;
+                    RemoveThese.Add(Transform);
+                }
+            }
+            foreach (Transform Transform in RemoveThese) {
+                PositionLerps.Remove(Transform);
+            }
+        }
+    }
+}

Assets/Scripts/Util/Lerper.cs.meta

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