feat: Distributed Authority Sample Avatar interactions (pick up & throw) [MTT-8905] [MTT-8884] (#208)

* asmdefs generated with dependencies mapped * one unnecessary dependency removed * renaming asmdefs & adding input assemblyinfo * avatar-side pickup/toss of pickupable object * adding a pickupable object, EnvironmentTransform, to scene with a spawner * adding explicitly inputsystem to player assembly
2024-08-21 15:41:39 -04:00 · 2024-08-21 15:41:39 -04:00 · dbfa3173ec
--- a/Experimental/DistributedAuthoritySample/Assets/InputSystem/AvatarActions.inputactions
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--- a/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/AssemblyInfo.cs
+++ b/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/AssemblyInfo.cs
@ -0,0 +1,2 @@
+using System.Runtime.CompilerServices;
+[assembly: InternalsVisibleTo("Unity.Multiplayer.Samples.SocialHub.Player")]
--- a/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/AssemblyInfo.cs.meta
+++ b/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/AssemblyInfo.cs.meta
@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 3465502a3a2c6448b96874d02edbb908
--- a/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/EnvironmentTransform.cs
+++ b/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/EnvironmentTransform.cs
@ -0,0 +1,54 @@
+using System;
+using Unity.Netcode;
+using Unity.Netcode.Components;
+using UnityEngine;
+
+namespace Unity.Multiplayer.Samples.SocialHub.Gameplay
+{
+    class EnvironmentTransform : NetworkTransform, IOwnershipRequestable, IGameplayEventInvokable
+    {
+        public event Action<NetworkObject, NetworkObject.OwnershipRequestResponseStatus> OnNetworkObjectOwnershipRequestResponse;
+
+        public event Action<NetworkObject, GameplayEvent> OnGameplayEvent;
+
+        public override void OnNetworkSpawn()
+        {
+            base.OnNetworkSpawn();
+
+            NetworkObject.OnOwnershipRequested += OnOwnershipRequested;
+            NetworkObject.OnOwnershipRequestResponse += OnOwnershipRequestResponse;
+        }
+
+        public override void OnNetworkDespawn()
+        {
+            if (NetworkObject)
+            {
+                NetworkObject.OnOwnershipRequested -= OnOwnershipRequested;
+                NetworkObject.OnOwnershipRequestResponse -= OnOwnershipRequestResponse;
+            }
+
+            OnGameplayEvent?.Invoke(NetworkObject, GameplayEvent.Despawned);
+        }
+
+        protected override void OnOwnershipChanged(ulong previous, ulong current)
+        {
+            base.OnOwnershipChanged(previous, current);
+
+            OnGameplayEvent?.Invoke(NetworkObject, GameplayEvent.OwnershipChange);
+        }
+
+        // note: invoked on owning client
+        bool OnOwnershipRequested(ulong clientRequesting)
+        {
+            // defaulting all ownership requests to true, as is the default for all ownership requests
+            // here, you'd introduce game-based logic to deny/approve requests
+            return true;
+        }
+
+        // note: invoked on requesting client
+        void OnOwnershipRequestResponse(NetworkObject.OwnershipRequestResponseStatus ownershipRequestResponse)
+        {
+            OnNetworkObjectOwnershipRequestResponse?.Invoke(NetworkObject, ownershipRequestResponse);
+        }
+    }
+}
--- a/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/EnvironmentTransform.cs.meta
+++ b/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/EnvironmentTransform.cs.meta
@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 54937e94f00ab46c8ae43b81027f342c
--- a/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/GameplayEvent.cs
+++ b/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/GameplayEvent.cs
@ -0,0 +1,10 @@
+using UnityEngine;
+
+namespace Unity.Multiplayer.Samples.SocialHub.Gameplay
+{
+    enum GameplayEvent
+    {
+        Despawned,
+        OwnershipChange
+    }
+}
--- a/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/GameplayEvent.cs.meta
+++ b/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/GameplayEvent.cs.meta
@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 507a19fc89d974f28adddfe762c13eb7
--- a/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/IGameplayEventInvokable.cs
+++ b/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/IGameplayEventInvokable.cs
@ -0,0 +1,10 @@
+using Unity.Netcode;
+using UnityEngine;
+
+namespace Unity.Multiplayer.Samples.SocialHub.Gameplay
+{
+    interface IGameplayEventInvokable
+    {
+        event System.Action<NetworkObject, GameplayEvent> OnGameplayEvent;
+    }
+}
--- a/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/IGameplayEventInvokable.cs.meta
+++ b/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/IGameplayEventInvokable.cs.meta
@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 0969e36952ce846e895b036088dd6afa
--- a/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/IOwnershipRequestable.cs
+++ b/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/IOwnershipRequestable.cs
@ -0,0 +1,11 @@
+using System;
+using Unity.Netcode;
+using UnityEngine;
+
+namespace Unity.Multiplayer.Samples.SocialHub.Gameplay
+{
+    interface IOwnershipRequestable
+    {
+        event Action<NetworkObject, NetworkObject.OwnershipRequestResponseStatus> OnNetworkObjectOwnershipRequestResponse;
+    }
+}
--- a/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/IOwnershipRequestable.cs.meta
+++ b/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/IOwnershipRequestable.cs.meta
@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 071ac956e173f479691c6233c0f4fb2e
--- a/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/SessionOwnerNetworkObjectSpawner.cs
+++ b/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/SessionOwnerNetworkObjectSpawner.cs
@ -0,0 +1,27 @@
+using Unity.Netcode;
+using UnityEngine;
+
+namespace Unity.Multiplayer.Samples.SocialHub.Gameplay
+{
+    class SessionOwnerNetworkObjectSpawner : NetworkBehaviour
+    {
+        [SerializeField]
+        NetworkObject m_NetworkObjectToSpawn;
+
+        NetworkVariable<bool> m_InitialSpawnComplete = new NetworkVariable<bool>();
+
+        public override void OnNetworkSpawn()
+        {
+            if (IsSessionOwner && !m_InitialSpawnComplete.Value)
+            {
+                Spawn();
+            }
+        }
+
+        void Spawn()
+        {
+            m_NetworkObjectToSpawn.InstantiateAndSpawn(NetworkManager, position: transform.position, rotation: transform.rotation);
+            m_InitialSpawnComplete.Value = true;
+        }
+    }
+}
--- a/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/SessionOwnerNetworkObjectSpawner.cs.meta
+++ b/Experimental/DistributedAuthoritySample/Assets/Scripts/Gameplay/SessionOwnerNetworkObjectSpawner.cs.meta
@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: eea4e07da167d4da7beddb67532a15f2
--- a/Experimental/DistributedAuthoritySample/Assets/Scripts/Input/AvatarInputs.cs
+++ b/Experimental/DistributedAuthoritySample/Assets/Scripts/Input/AvatarInputs.cs
@ -1,11 +1,15 @@
-using System.Runtime.CompilerServices;
+using System;
 using UnityEngine;
 using UnityEngine.InputSystem;
+using UnityEngine.InputSystem.Interactions;

 namespace Unity.Multiplayer.Samples.SocialHub.Input
 {
    class AvatarInputs : MonoBehaviour
    {
+        [SerializeField]
+        InputActionReference m_InteractActionReference;
+
        [Header("Character Input Values")]
        [SerializeField]
        internal Vector2 Move;
@ -26,6 +30,60 @@ namespace Unity.Multiplayer.Samples.SocialHub.Input
        [SerializeField]
        internal bool CursorInputForLook = true;

+        internal event Action InteractTapped;
+        internal event Action<double> InteractHeld;
+
+        // tracking when a Hold interaction has started/ended
+        bool m_HoldingInteractionPerformed;
+
+        void Start()
+        {
+            if (m_InteractActionReference == null)
+            {
+                Debug.LogWarning("Assign Interact InputActionReference to this MonoBehaviour!", this);
+                return;
+            }
+
+            m_InteractActionReference.action.performed += OnInteractPerformed;
+            m_InteractActionReference.action.canceled += OnInteractCanceled;
+            m_InteractActionReference.action.Enable();
+        }
+
+        void OnDestroy()
+        {
+            if (m_InteractActionReference != null)
+            {
+                m_InteractActionReference.action.performed -= OnInteractPerformed;
+                m_InteractActionReference.action.canceled -= OnInteractCanceled;
+                m_InteractActionReference.action.Disable();
+            }
+        }
+
+        void OnInteractPerformed(InputAction.CallbackContext context)
+        {
+            switch (context.interaction)
+            {
+                case HoldInteraction:
+                    m_HoldingInteractionPerformed = true;
+                    break;
+                case TapInteraction:
+                    InteractTapped?.Invoke();
+                    break;
+            }
+        }
+
+        void OnInteractCanceled(InputAction.CallbackContext context)
+        {
+            if (context.interaction is HoldInteraction)
+            {
+                if (m_HoldingInteractionPerformed)
+                {
+                    InteractHeld?.Invoke(context.duration);
+                }
+                m_HoldingInteractionPerformed = false;
+            }
+        }
+
 #if ENABLE_INPUT_SYSTEM
        void OnMove(InputValue value)
        {
--- a/Experimental/DistributedAuthoritySample/Assets/Scripts/Player/AvatarInteractions.cs
+++ b/Experimental/DistributedAuthoritySample/Assets/Scripts/Player/AvatarInteractions.cs
@ -0,0 +1,228 @@
+using System;
+using Unity.Multiplayer.Samples.SocialHub.Gameplay;
+using Unity.Multiplayer.Samples.SocialHub.Input;
+using Unity.Netcode;
+using Unity.Netcode.Components;
+using UnityEngine;
+
+namespace Unity.Multiplayer.Samples.SocialHub.Player
+{
+    [RequireComponent(typeof(AvatarInputs))]
+    class AvatarInteractions : NetworkBehaviour
+    {
+        [SerializeField]
+        Collider m_MainCollider;
+
+        [SerializeField]
+        AvatarInputs m_AvatarInputs;
+
+        [SerializeField]
+        NetworkRigidbody m_NetworkRigidbody;
+
+        [SerializeField]
+        Transform m_HoldTransform;
+
+        [SerializeField]
+        Collider m_InteractCollider;
+
+        [SerializeField]
+        float m_MinTossForce;
+
+        [SerializeField]
+        float m_MaxTossForce;
+
+        Collider[] m_Results = new Collider[1];
+
+        LayerMask m_PickupableLayerMask;
+
+        NetworkRigidbody m_HoldingRigidbody;
+
+        const float k_MinDurationHeld = 0f;
+        const float k_MaxDurationHeld = 2f;
+
+        void Awake()
+        {
+            m_PickupableLayerMask = 1 << LayerMask.NameToLayer("Pickupable");
+        }
+
+        public override void OnNetworkSpawn()
+        {
+            if (!HasAuthority)
+            {
+                return;
+            }
+
+            if (!m_AvatarInputs)
+            {
+                Debug.LogWarning("Assign AvatarInputs in the inspector!");
+                return;
+            }
+
+            m_AvatarInputs.InteractTapped += OnTapPerformed;
+            m_AvatarInputs.InteractHeld += OnHoldReleased;
+        }
+
+        public override void OnNetworkDespawn()
+        {
+            if (m_AvatarInputs)
+            {
+                m_AvatarInputs.InteractTapped -= OnTapPerformed;
+                m_AvatarInputs.InteractHeld -= OnHoldReleased;
+            }
+        }
+
+        void OnTapPerformed()
+        {
+            if (m_HoldingRigidbody != null)
+            {
+                ReleaseHeldObject();
+            }
+            else
+            {
+                PickUp();
+            }
+        }
+
+        void OnHoldReleased(double holdDuration)
+        {
+            if (m_HoldingRigidbody != null)
+            {
+                Toss(holdDuration);
+            }
+        }
+
+        void PickUp()
+        {
+            if (Physics.OverlapBoxNonAlloc(m_InteractCollider.transform.position, m_InteractCollider.bounds.extents, m_Results, Quaternion.identity, mask: m_PickupableLayerMask) > 0)
+            {
+                if (m_Results[0].TryGetComponent(out NetworkObject otherNetworkObject))
+                {
+                    // if NetworkObject is locked, nothing we can do but retry a pickup at another time
+                    if (otherNetworkObject.IsOwnershipLocked)
+                    {
+                        return;
+                    }
+
+                    // trivial case: other NetworkObject is owned by this client, we can attach to fixed joint
+                    if (otherNetworkObject.HasAuthority)
+                    {
+                        AttachToFixedJoint(otherNetworkObject);
+                        return;
+                    }
+
+                    if (otherNetworkObject.IsOwnershipTransferable)
+                    {
+                        // can use change ownership directly
+                        otherNetworkObject.ChangeOwnership(OwnerClientId);
+
+                        // we can attach it via FixedPoint now as we are now owning this NetworkObject
+                        AttachToFixedJoint(otherNetworkObject);
+                    }
+                    else if (otherNetworkObject.IsOwnershipRequestRequired)
+                    {
+                        // if not transferable, we must request access to become owner
+                        if (m_Results[0].TryGetComponent(out IOwnershipRequestable otherRequestable))
+                        {
+                            var ownershipRequestStatus = otherNetworkObject.RequestOwnership();
+                            if (ownershipRequestStatus == NetworkObject.OwnershipRequestStatus.RequestSent)
+                            {
+                                otherRequestable.OnNetworkObjectOwnershipRequestResponse += OnOwnershipRequestResponse;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        void OnOwnershipRequestResponse(NetworkObject other, NetworkObject.OwnershipRequestResponseStatus status)
+        {
+            // unsubscribe
+            var ownershipRequestable = other.GetComponent<IOwnershipRequestable>();
+            ownershipRequestable.OnNetworkObjectOwnershipRequestResponse -= OnOwnershipRequestResponse;
+
+            if (status != NetworkObject.OwnershipRequestResponseStatus.Approved)
+            {
+                return;
+            }
+
+            AttachToFixedJoint(other);
+        }
+
+        void AttachToFixedJoint(NetworkObject other)
+        {
+            if (!other.TryGetComponent(out NetworkRigidbody otherNetworkRigidbody))
+            {
+                return;
+            }
+
+            var success = otherNetworkRigidbody.AttachToFixedJoint(m_NetworkRigidbody, m_HoldTransform.position, massScale: 0.00001f);
+            if (success)
+            {
+                m_HoldingRigidbody = otherNetworkRigidbody;
+
+                // set ownership status to request required, now that this object is being held
+                m_HoldingRigidbody.NetworkObject.SetOwnershipStatus(NetworkObject.OwnershipStatus.RequestRequired, clearAndSet: true);
+
+                var gameplayEventInvokable = other.GetComponent<IGameplayEventInvokable>();
+                gameplayEventInvokable.OnGameplayEvent += OnGameplayEvent;
+
+                // prevent collisions from this collider to the picked up object and vice-versa
+                Physics.IgnoreCollision(m_MainCollider, other.GetComponent<Collider>(), true);
+            }
+        }
+
+        void OnGameplayEvent(NetworkObject networkObject, GameplayEvent gameplayEvent)
+        {
+            switch (gameplayEvent)
+            {
+                case GameplayEvent.Despawned:
+                case GameplayEvent.OwnershipChange:
+
+                    // unsubscribe
+                    var gameplayEventInvokable = networkObject.GetComponent<IGameplayEventInvokable>();
+                    gameplayEventInvokable.OnGameplayEvent -= OnGameplayEvent;
+
+                    // revert collision
+                    if (networkObject.TryGetComponent(out Collider otherCollider))
+                    {
+                        Physics.IgnoreCollision(m_MainCollider, otherCollider, false);
+                    }
+
+                    // don't have ownership of the item, thus we can't invoke DetachFromFixedJoint(), but we need to remove created FixedJoint component
+                    if (networkObject.TryGetComponent(out FixedJoint fixedJoint))
+                    {
+                        Destroy(fixedJoint);
+                    }
+
+                    m_HoldingRigidbody = null;
+
+                    break;
+                default:
+                    throw new Exception($"Unknown GameplayEvent {gameplayEvent}!");
+            }
+        }
+
+        void ReleaseHeldObject()
+        {
+            // set ownership status to request required, now that this object is being held
+            m_HoldingRigidbody.NetworkObject.SetOwnershipStatus(NetworkObject.OwnershipStatus.Distributable, clearAndSet: true);
+            m_HoldingRigidbody.NetworkObject.SetOwnershipStatus(NetworkObject.OwnershipStatus.Transferable);
+
+            m_HoldingRigidbody.DetachFromFixedJoint();
+            m_HoldingRigidbody.GetComponent<Rigidbody>().useGravity = true;
+            Physics.IgnoreCollision(m_MainCollider, m_HoldingRigidbody.GetComponent<Collider>(), false);
+            m_HoldingRigidbody = null;
+        }
+
+        void Toss(double holdDuration)
+        {
+            var heldRigidbody = m_HoldingRigidbody.GetComponent<Rigidbody>();
+            ReleaseHeldObject();
+
+            // apply a force to the released object
+            float timeHeldClamped = Mathf.Clamp((float)holdDuration, k_MinDurationHeld, k_MaxDurationHeld);
+            float tossForce = Mathf.Lerp(m_MinTossForce, m_MaxTossForce, Mathf.Clamp(timeHeldClamped, 0f, 1f));
+            heldRigidbody.AddForce(transform.forward * tossForce, ForceMode.Impulse);
+        }
+    }
+}
--- a/Experimental/DistributedAuthoritySample/Assets/Scripts/Player/AvatarInteractions.cs.meta
+++ b/Experimental/DistributedAuthoritySample/Assets/Scripts/Player/AvatarInteractions.cs.meta
@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: b47efef44cef74d9ca00f4913607f988
--- a/Experimental/DistributedAuthoritySample/ProjectSettings/TagManager.asset
+++ b/Experimental/DistributedAuthoritySample/ProjectSettings/TagManager.asset
@ -12,8 +12,8 @@ TagManager:
  - 
  - Water
  - UI
-  - '[Empty Slot]'
  - Ground
+  - Pickupable
  - 
  - 
  -