将Spline移出Plugin，以调整SplineRenderer的OnWillCameraRender

Assets/Dreamteck/Splines/Components/BlankUser.cs

@@ -0,0 +1,43 @@
+using UnityEngine;
+using System.Collections;
+
+namespace Dreamteck.Splines
+{
+    //This is a blank SplineUser-derived class which you can use to build your custom SplineUser
+    //You can safely delete any functions that you won't use
+    //DO NOT ADD Update, LateUpdate or FixedUpdate, use Run, it is automatically called through one of these methods
+    public class BlankUser : SplineUser
+    {
+        protected override void Awake()
+        {
+            base.Awake();
+            //Awake is also called in the editor
+        }
+
+        void Start()
+        {
+            //Write initialization code here
+        }
+
+        protected override void LateRun()
+        {
+            base.LateRun();
+            //Code to run every Update/FixedUpdate/LateUpdate
+        }
+
+        protected override void Build()
+        {
+            base.Build();
+            //Build is called after the spline has been sampled. 
+            //Use it for calculations (example: generate mesh geometry, calculate object positions)
+        }
+
+        protected override void PostBuild()
+        {
+            base.PostBuild();
+            //Called on the main thread after Build has finished
+            //Use it to apply the calculations from Build to GameObjects, Transforms, Meshes, etc.
+        }
+
+    }
+}