Added interaction, hand, rigidbody dragging, picking up hammer

Assets/Plugins/Interaction/Runtime/Utils/HandSway.cs

@@ -0,0 +1,32 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Nothke.Utils
+{
+    public class HandSway : MonoBehaviour
+    {
+        public float springRate = 10;
+        public float softClampAngle = 30;
+
+        Quaternion lastRotation;
+
+        void Update()
+        {
+            Quaternion target = transform.parent.rotation;
+
+            lastRotation = Quaternion.Slerp(lastRotation, target, Time.deltaTime * springRate);
+            lastRotation = SoftClampRotation(target, lastRotation, softClampAngle);
+
+            transform.rotation = lastRotation;
+        }
+
+        public static Quaternion SoftClampRotation(Quaternion origin, Quaternion target, float limitAngleDegrees)
+        {
+            float angle = Quaternion.Angle(origin, target);
+            float softAngle = Mathf.Atan(angle * Mathf.PI / 2 / limitAngleDegrees) / Mathf.PI * 2 * limitAngleDegrees;
+
+            return Quaternion.RotateTowards(origin, target, softAngle); // note: uses degrees
+        }
+    }
+}