添加插件

Assets/Obi/Samples/RopeAndRod/SampleResources/Scripts/RopeTenser.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Obi.Samples
+{
+    public class RopeTenser : MonoBehaviour
+    {
+        public float force = 10;
+
+        // Update is called once per frame
+        void Update()
+        {
+            GetComponent<Rigidbody>().AddForce(Vector3.down * force);
+        }
+    }
+}