修复头尾抖，auto orient完全胜利

Signed-off-by: TRAfoer <lhf190@outlook.com>

Assets/Dreamteck/Splines/Components/SplineUser.cs

@@ -1,6 +1,7 @@
 using UnityEngine;
 
-namespace Dreamteck.Splines {
+namespace Dreamteck.Splines
+{
     [ExecuteInEditMode]
     public class SplineUser : MonoBehaviour, ISerializationCallbackReceiver, ISampleModifier
     {
@@ -10,7 +11,8 @@ namespace Dreamteck.Splines {
 
         public SplineComputer spline
         {
-            get {
+            get
+            {
                 return _spline;
             }
             set
@@ -104,7 +106,7 @@ namespace Dreamteck.Splines {
                 if (value != _loopSamples)
                 {
                     _loopSamples = value;
-                    if(!_loopSamples && _clipTo < _clipFrom)
+                    if (!_loopSamples && _clipTo < _clipFrom)
                     {
                         double temp = _clipTo;
                         _clipTo = _clipFrom;
@@ -218,7 +220,7 @@ namespace Dreamteck.Splines {
 
         protected Transform trs
         {
-            get {  return _trs;  }
+            get { return _trs; }
         }
         protected bool hasTransform
         {
@@ -252,7 +254,8 @@ namespace Dreamteck.Splines {
         }
 #endif
 
-        protected virtual void Awake() {
+        protected virtual void Awake()
+        {
 #if UNITY_EDITOR
             _isPlaying = Application.isPlaying;
             if (!_isPlaying)
@@ -272,7 +275,8 @@ namespace Dreamteck.Splines {
             if (buildOnAwake && Application.isPlaying)
             {
                 RebuildImmediate();
-            } else
+            }
+            else
             {
                 GetSamples();
             }
@@ -438,6 +442,8 @@ namespace Dreamteck.Splines {
         /// <param name="sampleComputer">Should the SplineUser sample the SplineComputer</param>
         public virtual void Rebuild()
         {
+            _sampleCollection.Evaluate(clipFrom, ref _clipFromSample);
+            _sampleCollection.Evaluate(_clipTo, ref _clipToSample);
 #if UNITY_EDITOR
             if (!_hasTransform)
             {
@@ -505,7 +511,7 @@ namespace Dreamteck.Splines {
                 LateRun();
             }
 #if UNITY_EDITOR
-            if(!_isPlaying && updateMethod == UpdateMethod.FixedUpdate)
+            if (!_isPlaying && updateMethod == UpdateMethod.FixedUpdate)
             {
                 Run();
                 RunUpdate();
@@ -550,7 +556,7 @@ namespace Dreamteck.Splines {
             {
                 PostBuild();
                 EmptySplineHandler postBuildHandler = onPostBuild;
-                if(postBuildHandler != null)
+                if (postBuildHandler != null)
                 {
                     postBuildHandler();
                 }
@@ -682,19 +688,22 @@ namespace Dreamteck.Splines {
             if (_clipFrom != 0.0)
             {
                 _sampleCollection.Evaluate(clipFrom, ref _clipFromSample);
-            } else
+            }
+            else
             {
                 _clipFromSample = _sampleCollection.samples[0];
             }
 
-            if(_clipTo != 1.0)
+            if (_clipTo != 1.0)
             {
                 _sampleCollection.Evaluate(_clipTo, ref _clipToSample);
-            } else
+            }
+            else
             {
                 _clipToSample = _sampleCollection.samples[_sampleCollection.length - 1];
             }
 
+
             int start, end;
             _sampleCount = _sampleCollection.GetClippedSampleCount(_clipFrom, _clipTo, out start, out end);
             double lerp;