404 lines
13 KiB
C#
404 lines
13 KiB
C#
using System.Collections.Generic;
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using Unity.Netcode;
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using Unity.Netcode.Components;
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using UnityEngine;
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[RequireComponent(typeof(Rigidbody), typeof(NetworkRigidbody))]
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public abstract class NetworkHeldInteractable : NetworkInteractable, IWorkstationItemControl
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{
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protected const ulong NoHolder = ulong.MaxValue;
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private static readonly HashSet<NetworkHeldInteractable> SpawnedHeldObjects = new();
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[Header("Physics")]
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[SerializeField] private Rigidbody physicsBody;
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[SerializeField] private Collider[] objectColliders;
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[SerializeField, Min(0.05f)] private float collisionRefreshInterval = 0.25f;
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[Header("Holding Follow")]
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[SerializeField, Min(0.01f)] private float positionSmoothTime = 0.12f;
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[SerializeField, Min(0.1f)] private float maximumFollowSpeed = 12f;
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[SerializeField, Min(0.1f)] private float maximumFollowDistance = 1.25f;
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[SerializeField, Min(0.5f)] private float maximumHoldDistance = 4.5f;
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[SerializeField, Min(0.1f)] private float rotationFollowSpeed = 14f;
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[Header("Throw")]
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[SerializeField, Min(0f)] private float throwForce = 6f;
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[SerializeField, Min(0f)] private float throwUpwardForce = 0.5f;
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private readonly NetworkVariable<ulong> holderClientId = new(
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NoHolder,
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NetworkVariableReadPermission.Everyone,
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NetworkVariableWritePermission.Server);
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private readonly NetworkVariable<bool> isExternallyControlled = new(
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false,
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NetworkVariableReadPermission.Everyone,
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NetworkVariableWritePermission.Server);
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private readonly HashSet<Collider> ignoredPlayerColliders = new();
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private readonly HashSet<Collider> desiredIgnoredColliders = new();
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private readonly List<Collider> collidersToRestore = new();
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private float nextCollisionRefreshTime;
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private bool initialUseGravity;
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private CollisionDetectionMode initialCollisionDetectionMode;
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protected abstract Vector3 HoldingOffset { get; }
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protected abstract string DropPrompt { get; }
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public bool IsHeld => holderClientId.Value != NoHolder;
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public bool IsExternallyControlled => isExternallyControlled.Value;
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public bool IsHeldByLocalPlayer =>
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NetworkManager != null && holderClientId.Value == NetworkManager.LocalClientId;
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public string HeldObjectName => InteractionLabel;
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public override string InteractionPrompt => IsExternallyControlled
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? "In machine"
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: !IsHeld
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? InteractionLabel
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: IsHeldByLocalPlayer
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? DropPrompt
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: "In use";
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public override bool IsInteractionAvailable => base.IsInteractionAvailable &&
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!IsExternallyControlled &&
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(!IsHeld || IsHeldByLocalPlayer);
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private void Awake()
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{
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if (physicsBody == null)
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physicsBody = GetComponent<Rigidbody>();
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if (objectColliders == null || objectColliders.Length == 0)
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objectColliders = GetComponentsInChildren<Collider>(true);
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if (physicsBody != null)
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{
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initialUseGravity = physicsBody.useGravity;
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initialCollisionDetectionMode = physicsBody.collisionDetectionMode;
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}
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}
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public override void OnNetworkSpawn()
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{
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SpawnedHeldObjects.Add(this);
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holderClientId.OnValueChanged += HandleHolderChanged;
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isExternallyControlled.OnValueChanged += HandleExternalControlChanged;
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ApplyHoldingState();
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}
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public override void OnNetworkDespawn()
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{
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holderClientId.OnValueChanged -= HandleHolderChanged;
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isExternallyControlled.OnValueChanged -= HandleExternalControlChanged;
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SpawnedHeldObjects.Remove(this);
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RestorePlayerCollisions();
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}
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private void Update()
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{
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if (!IsSpawned || !IsHeld || IsExternallyControlled ||
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Time.time < nextCollisionRefreshTime)
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{
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return;
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}
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nextCollisionRefreshTime = Time.time + collisionRefreshInterval;
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RefreshHolderCollisions();
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}
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private void FixedUpdate()
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{
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if (!IsServer || !IsSpawned || !IsHeld || IsExternallyControlled || physicsBody == null)
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return;
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if (!TryGetPlayerObject(holderClientId.Value, out NetworkObject holder))
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{
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if (IsServer)
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StopHolding();
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return;
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}
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Transform anchor = ResolveHoldingAnchor(holder);
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if (!DriveTowardAnchor(anchor))
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return;
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}
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public void RequestThrow()
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{
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if (IsSpawned && IsHeldByLocalPlayer)
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RequestThrowServerRpc();
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}
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public bool TryAcquireExternalControl()
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{
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if (!IsServer || !IsSpawned || IsExternallyControlled)
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return false;
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isExternallyControlled.Value = true;
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if (IsHeld)
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holderClientId.Value = NoHolder;
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ApplyHoldingState();
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return true;
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}
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public bool TryReleaseExternalControl()
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{
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if (!IsServer || !IsSpawned || !IsExternallyControlled)
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return false;
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isExternallyControlled.Value = false;
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ApplyHoldingState();
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return true;
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}
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public bool TryReleaseExternalControlToPlayer(ulong clientId)
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{
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if (!IsServer || !IsSpawned || !IsExternallyControlled ||
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TryGetHeldObject(clientId, out _) ||
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NetworkHandItemInteractable.TryGetHeldItem(clientId, out _) ||
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!TryGetPlayerObject(clientId, out _))
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{
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return false;
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}
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isExternallyControlled.Value = false;
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holderClientId.Value = clientId;
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ApplyHoldingState();
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return true;
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}
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public static bool TryGetHeldObject(
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ulong clientId,
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out NetworkHeldInteractable heldObject)
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{
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foreach (NetworkHeldInteractable candidate in SpawnedHeldObjects)
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{
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if (candidate != null && candidate.holderClientId.Value == clientId)
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{
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heldObject = candidate;
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return true;
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}
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}
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heldObject = null;
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return false;
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}
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protected override bool CanInteractOnServer(ulong senderClientId)
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{
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if (IsExternallyControlled)
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return false;
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if (holderClientId.Value == senderClientId)
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return true;
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return !IsHeld &&
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!TryGetHeldObject(senderClientId, out _) &&
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!NetworkHandItemInteractable.TryGetHeldItem(senderClientId, out _);
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}
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protected override void InteractOnServer(ulong senderClientId, NetworkObject playerObject)
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{
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if (holderClientId.Value == senderClientId)
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StopHolding();
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else if (!IsHeld)
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StartHolding(senderClientId);
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}
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[Rpc(SendTo.Server, InvokePermission = RpcInvokePermission.Everyone)]
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private void RequestThrowServerRpc(RpcParams rpcParams = default)
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{
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ulong senderClientId = rpcParams.Receive.SenderClientId;
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if (holderClientId.Value != senderClientId ||
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!TryGetPlayerObject(senderClientId, out NetworkObject playerObject))
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{
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return;
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}
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FirstPersonCameraController cameraController =
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playerObject.GetComponent<FirstPersonCameraController>();
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Vector3 throwDirection = cameraController != null
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? cameraController.AimForward
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: playerObject.transform.forward;
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Vector3 throwVelocity = throwDirection * throwForce +
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Vector3.up * throwUpwardForce;
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StopHolding();
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if (physicsBody != null)
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physicsBody.linearVelocity = throwVelocity;
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}
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private void StartHolding(ulong clientId)
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{
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if (IsExternallyControlled)
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return;
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holderClientId.Value = clientId;
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ApplyHoldingState();
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}
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private void StopHolding()
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{
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holderClientId.Value = NoHolder;
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ApplyHoldingState();
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}
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private Transform ResolveHoldingAnchor(NetworkObject holder)
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{
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FirstPersonCameraController cameraController =
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holder.GetComponent<FirstPersonCameraController>();
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return cameraController != null ? cameraController.AimTransform : holder.transform;
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}
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private bool DriveTowardAnchor(Transform anchor)
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{
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Vector3 targetPosition = anchor.TransformPoint(HoldingOffset);
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Vector3 targetDelta = targetPosition - physicsBody.position;
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if (targetDelta.sqrMagnitude > maximumHoldDistance * maximumHoldDistance)
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{
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StopHolding();
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return false;
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}
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float distance = targetDelta.magnitude;
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float speedDistance = Mathf.Max(maximumFollowDistance, 0.01f);
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float desiredSpeed = maximumFollowSpeed * Mathf.Clamp01(distance / speedDistance);
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Vector3 desiredVelocity = distance > 0.0001f
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? targetDelta / distance * desiredSpeed
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: Vector3.zero;
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float maximumAcceleration = maximumFollowSpeed / Mathf.Max(positionSmoothTime, 0.01f);
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Vector3 velocityChange = Vector3.ClampMagnitude(
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desiredVelocity - physicsBody.linearVelocity,
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maximumAcceleration * Time.fixedDeltaTime);
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physicsBody.AddForce(velocityChange, ForceMode.VelocityChange);
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DriveRotation(anchor.rotation);
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return true;
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}
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private void DriveRotation(Quaternion targetRotation)
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{
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Quaternion rotationDelta = targetRotation * Quaternion.Inverse(physicsBody.rotation);
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rotationDelta.ToAngleAxis(out float angle, out Vector3 axis);
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if (axis.sqrMagnitude < 0.0001f || float.IsNaN(axis.x))
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return;
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if (angle > 180f)
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angle -= 360f;
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Vector3 desiredAngularVelocity = axis.normalized *
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(angle * Mathf.Deg2Rad * rotationFollowSpeed);
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desiredAngularVelocity = Vector3.ClampMagnitude(
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desiredAngularVelocity,
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rotationFollowSpeed);
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Vector3 angularVelocityChange = Vector3.ClampMagnitude(
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desiredAngularVelocity - physicsBody.angularVelocity,
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rotationFollowSpeed * 4f * Time.fixedDeltaTime);
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physicsBody.AddTorque(angularVelocityChange, ForceMode.VelocityChange);
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}
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private void HandleHolderChanged(ulong _, ulong __) => ApplyHoldingState();
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private void HandleExternalControlChanged(bool _, bool __) => ApplyHoldingState();
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private void ApplyHoldingState()
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{
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if (physicsBody != null)
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{
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bool isPhysicallyHeld = IsHeld && !IsExternallyControlled;
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bool shouldBeKinematic = IsExternallyControlled || !IsServer;
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if (shouldBeKinematic)
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{
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physicsBody.collisionDetectionMode = CollisionDetectionMode.ContinuousSpeculative;
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physicsBody.isKinematic = true;
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physicsBody.useGravity = false;
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}
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else
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{
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physicsBody.isKinematic = false;
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physicsBody.useGravity = isPhysicallyHeld ? false : initialUseGravity;
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physicsBody.collisionDetectionMode = ResolveDynamicCollisionDetectionMode();
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}
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if (!isPhysicallyHeld)
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{
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physicsBody.linearVelocity = Vector3.zero;
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physicsBody.angularVelocity = Vector3.zero;
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}
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}
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if (IsHeld && !IsExternallyControlled)
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RefreshHolderCollisions();
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else
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RestorePlayerCollisions();
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}
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private CollisionDetectionMode ResolveDynamicCollisionDetectionMode() =>
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initialCollisionDetectionMode == CollisionDetectionMode.Discrete
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? CollisionDetectionMode.ContinuousDynamic
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: initialCollisionDetectionMode;
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private void RefreshHolderCollisions()
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{
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desiredIgnoredColliders.Clear();
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if (TryGetPlayerObject(holderClientId.Value, out NetworkObject holder))
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{
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foreach (Collider holderCollider in holder.GetComponentsInChildren<Collider>(true))
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desiredIgnoredColliders.Add(holderCollider);
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}
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collidersToRestore.Clear();
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foreach (Collider ignoredCollider in ignoredPlayerColliders)
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{
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if (ignoredCollider == null || !desiredIgnoredColliders.Contains(ignoredCollider))
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collidersToRestore.Add(ignoredCollider);
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}
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foreach (Collider colliderToRestore in collidersToRestore)
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{
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SetCollisionIgnored(colliderToRestore, false);
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ignoredPlayerColliders.Remove(colliderToRestore);
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}
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foreach (Collider desiredCollider in desiredIgnoredColliders)
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{
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if (desiredCollider != null && ignoredPlayerColliders.Add(desiredCollider))
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SetCollisionIgnored(desiredCollider, true);
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}
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}
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private void SetCollisionIgnored(Collider playerCollider, bool ignored)
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{
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if (playerCollider == null)
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return;
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foreach (Collider objectCollider in objectColliders)
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{
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if (objectCollider != null)
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Physics.IgnoreCollision(objectCollider, playerCollider, ignored);
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}
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}
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private void RestorePlayerCollisions()
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{
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foreach (Collider playerCollider in ignoredPlayerColliders)
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{
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if (playerCollider == null)
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continue;
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SetCollisionIgnored(playerCollider, false);
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}
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ignoredPlayerColliders.Clear();
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desiredIgnoredColliders.Clear();
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collidersToRestore.Clear();
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}
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}
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