working on multiplayer

Runtime/Engine/Code/Simulation/PhysicsObjectDragger.cs

@@ -0,0 +1,60 @@
+using System;
+using RebootKit.Engine.Extensions;
+using UnityEngine;
+
+namespace RebootKit.Engine.Services.Simulation {
+    public class PhysicsObjectDragger : MonoBehaviour {
+        [field: SerializeField]
+        public float DampingFactor { get; private set; } = 1.0f;
+
+        [field: SerializeField]
+        public float AngularSlowdown { get; private set; } = 90.0f;
+
+        [field: SerializeField]
+        public float DragForce { get; private set; } = 10.0f;
+
+        public Rigidbody Current { get; private set; }
+
+        [field: SerializeField]
+        public Vector3 TargetWorldPosition { get; set; }
+
+        public bool IsDragging => Current != null;
+
+        public void FixedUpdate() {
+            if (Current.OrNull() == null) {
+                return;
+            }
+
+            Vector3 direction = (TargetWorldPosition - Current.position).normalized;
+            float distance = Vector3.Distance(TargetWorldPosition, Current.position);
+
+            Vector3 damping = Current.linearVelocity * DampingFactor;
+
+            Vector3 force = direction * Mathf.Clamp(distance * DragForce, 0, DragForce) - damping;
+            Current.AddForce(force, ForceMode.Force);
+
+            Current.angularVelocity = Vector3.MoveTowards(Current.angularVelocity, Vector3.zero, Time.fixedDeltaTime * AngularSlowdown);
+        }
+
+        void OnDrawGizmosSelected() {
+            Gizmos.color = Color.green;
+            Gizmos.DrawSphere(TargetWorldPosition, 0.1f);
+        }
+
+        public void Grab(Rigidbody physicsObject) {
+            Drop();
+
+            Current = physicsObject;
+            Current.linearDamping = 5.0f;
+        }
+
+        public void Drop() {
+            if (Current == null) {
+                return;
+            }
+
+            Current.linearDamping = 0.0f;
+            Current = null;
+        }
+    }
+}