Added interaction, hand, rigidbody dragging, picking up hammer

Assets/Plugins/Interaction/Runtime/Core/InteractionController.cs

@@ -0,0 +1,342 @@
+//#define NEVER_MOUSE_RAY
+#define USE_FIXED_UPDATE
+
+using UnityEngine;
+using Nothke.Interaction.Items;
+using Nothke.Interaction.Integration;
+
+namespace Nothke.Interaction
+{
+    public class InteractionController : MonoBehaviour
+    {
+        Transform originTransform;
+
+        public float interactDistance = 2;
+
+        public bool rayModeToggling = false;
+        public bool mouseRay = false;
+
+        public MonoBehaviour lockableFreeLookComponent;
+        ILockableFreeLook lockableFreeLook;
+
+        Interactable interactable;
+        Interactable lastHovered;
+
+        public Interactable hovered { get; private set; }
+
+        public MonoBehaviour handsComponent;
+        public IHands hands;
+        public LayerMask raycastLayerMask = -1;
+
+        [HideInInspector]
+        public Vector3 startScreenPosition;
+
+        [System.NonSerialized]
+        public RaycastHit hit;
+        [System.NonSerialized]
+        public bool hasHit;
+
+        bool LMB;
+        bool LMBup;
+        bool rayModeToggleDown;
+
+        bool freezeDetection;
+        public bool detectionFrozen => freezeDetection;
+
+        bool isDetached;
+        bool wasMouseRayBeforeTemp;
+
+        public delegate void HoverAction(Interactable interactable);
+        public event HoverAction OnHover;
+        public delegate void DehoverAction();
+        public event DehoverAction OnDehover;
+        public delegate void RayModeChangeAction(bool enable);
+        public event RayModeChangeAction OnRayModeChange;
+
+        public bool debug;
+
+        Camera cam;
+
+        protected Ray interactionRay;
+
+        private void Awake()
+        {
+            if (handsComponent)
+            {
+                hands = handsComponent.GetComponent<IHands>();
+                hands.controller = this;
+                Debug.Assert(hands != null, "Assigned component doesn't implement IHands");
+            }
+            else
+            {
+                hands = GetComponent<IHands>();
+                if (hands != null)
+                    hands.controller = this;
+            }
+        }
+
+        void Start()
+        {
+            cam = Camera.main;
+
+            if (lockableFreeLookComponent)
+            {
+                lockableFreeLook = lockableFreeLookComponent.GetComponent<ILockableFreeLook>();
+
+                if (lockableFreeLook == null)
+                    Debug.Log("ILockableFreeLook not found on assigned component", lockableFreeLookComponent);
+            }
+
+            originTransform = transform;
+
+            Dehover();
+
+            SetRayMode(mouseRay);
+        }
+
+        public void SetTempRayOrigin(Transform t)
+        {
+            originTransform = t;
+        }
+
+        public void ResetTempRayOrigin()
+        {
+            originTransform = transform;
+        }
+
+        public void SetInput(bool interactDown, bool interactUp, bool rayModeChangeDown)
+        {
+            LMB = interactDown;
+            LMBup = interactUp;
+            this.rayModeToggleDown = rayModeChangeDown;
+        }
+
+        public void UpdateRaycast()
+        {
+            if (mouseRay)
+                interactionRay = cam.ScreenPointToRay(Input.mousePosition);
+            else
+                interactionRay = new Ray(originTransform.position, originTransform.forward);
+
+            hovered = null;
+
+            // DETECTION - Raycast
+            if (!freezeDetection)
+            {
+                GameObject hito = GetInteractingObject();
+
+                if (hito)
+                {
+                    hasHit = true;
+
+                    hovered = hito.GetComponentInParent<Interactable>();
+
+                    // Prevent interaction with items that don't want to be interacted with
+                    // unless holding a certain item
+                    if (hovered is IItemInHandsInteractionDependable)
+                    {
+                        if (hands == null)
+                            hovered = null;
+                        else
+                        if (!(hovered as IItemInHandsInteractionDependable).IsInteractableIfHolding(hands.item))
+                            hovered = null;
+                    }
+
+                    // Prevent interaction if item in hands prevents interaction
+                    if (hands != null && hands.item && hands.item is IEnvironmentInteractionPreventable eip)
+                    {
+                        if (!eip.EnvironmentInteractionIsAllowed)
+                            hovered = null;
+                    }
+
+#pragma warning disable CS0618 // Type or member is obsolete
+                    if (hovered is ISelectiveInteractable)
+                    {
+                        if (!(hovered as ISelectiveInteractable).CanInteract)
+                            hovered = null;
+                    }
+#pragma warning restore CS0618 // Type or member is obsolete
+
+                    if (hovered is ICanInteract)
+                    {
+                        if (!(hovered as ICanInteract).CanInteract(this))
+                            hovered = null;
+                    }
+
+                    if (hovered != lastHovered && hovered != null)
+                        Hover(hovered);
+                }
+                else hasHit = false;
+
+                if (hovered != lastHovered && hovered == null)
+                    Dehover();
+            }
+        }
+
+        /// <summary>
+        /// Override this to provide a custom raycaster for example. You can get the default provided ray from interactionRay.
+        /// </summary>
+        protected virtual GameObject GetInteractingObject()
+        {
+            if (Physics.Raycast(interactionRay, out hit, interactDistance, raycastLayerMask))
+                return hit.collider.gameObject;
+            else return null;
+        }
+
+        /// <summary>
+        /// Call this after you set input. Should be called in Update()
+        /// </summary>
+        public void UpdateInput()
+        {
+            // On click
+            bool interactedThisFrame = false;
+            if (hovered && LMB)
+            {
+                interactable = hovered;
+
+                if (hands != null && interactable is ITakeable)
+                {
+                    if (interactable is ISelectiveTakeable)
+                    {
+                        if ((interactable as ISelectiveTakeable).CanBeTaken())
+                            hands.Take(interactable as ITakeable);
+                    }
+                    else
+                        hands.Take(interactable as ITakeable);
+                }
+
+                interactable.Use(this);
+                interactable.StartHold();
+                interactedThisFrame = true;
+
+                startScreenPosition = Input.mousePosition;
+            }
+
+            // On scroll
+            if (hovered && hovered is IScrollInteractable scrollInteractable)
+            {
+                float scroll = Input.mouseScrollDelta.y;
+
+                if (scroll != 0)
+                    scrollInteractable.Scroll(this, scroll);
+            }
+
+            // On release
+            if (interactable && LMBup)
+            {
+                interactable.EndHold();
+                interactable = null;
+            }
+
+            lastHovered = hovered;
+
+            LMB = false;
+            LMBup = false;
+
+            if (!interactedThisFrame && hands != null)
+                hands.UpdateInteraction();
+        }
+
+        public void Recast()
+        {
+            hovered = null;
+        }
+
+        void ToggleRayMode()
+        {
+            mouseRay = !mouseRay;
+
+            SetRayMode(mouseRay);
+        }
+
+        public void FreezeDetection()
+        {
+            freezeDetection = true;
+            hovered = null;
+        }
+
+        public void UnfreezeDetection()
+        {
+            freezeDetection = false;
+            Dehover();
+            Recast();
+        }
+
+        public void SetTempMouseRay(bool tempMouse)
+        {
+            if (tempMouse)
+            {
+                wasMouseRayBeforeTemp = mouseRay;
+                SetRayMode(true);
+            }
+            else
+            {
+                if (!wasMouseRayBeforeTemp)
+                {
+                    SetRayMode(false);
+                }
+            }
+        }
+
+        public void SetRayMode(bool isMouse)
+        {
+            mouseRay = isMouse;
+
+#if !NEVER_MOUSE_RAY
+            if (mouseRay)
+            {
+                Cursor.lockState = CursorLockMode.None;
+
+                // TODO: if windows
+                //System.Windows.Forms.Cursor.Position = new System.Drawing.Point(10, 10);
+            }
+            else
+            {
+                Cursor.lockState = CursorLockMode.Locked;
+                //System.Windows.Forms.Cursor.Position = new System.Drawing.Point(Screen.width / 2, Screen.height / 2);
+            }
+#endif
+
+            if (lockableFreeLook != null)
+                lockableFreeLook.LockFreeLook(mouseRay);
+            else
+                Debug.LogWarning("No freelook lockable");
+
+            OnRayModeChange?.Invoke(mouseRay);
+
+            if (debug)
+                Debug.Log("Ray mode changed to " + (mouseRay ? " Mouse" : " Center"));
+
+            //Cursor.visible = mouseRay;
+
+            if (hands != null)
+                hands.isFixed = mouseRay;
+        }
+
+        void Hover(Interactable interactable)
+        {
+            interactable.OnHover();
+            OnHover?.Invoke(interactable);
+
+            if (debug)
+                Debug.Log("Hovered " + interactable.name);
+        }
+
+        void Dehover()
+        {
+            if (lastHovered)
+                lastHovered.OnDehover();
+
+            OnDehover?.Invoke();
+
+            if (debug)
+                Debug.Log("Dehovered");
+        }
+
+        public void LockFreeLook(bool b)
+        {
+            if (lockableFreeLook != null)
+                lockableFreeLook.LockFreeLook(b);
+        }
+    }
+}