[BUGFIX] Fixed DORotateQuaternion not always choosing the shortest path

UnityTests.Unity5/Assets/_Tests/TempTests.cs

@@ -12,23 +12,13 @@ using UnityEngine.UI;
 public class TempTests : BrainBase
 {
     public Transform target;
-    Tween myTween;
+    public Transform rotTarget;
-    void Start()
+    public Ease easeType = Ease.Linear;
+    
+    IEnumerator Start()
     {
-        myTween = target.DOMove(new Vector3(5, 5, 5), 25).SetAutoKill(false).SetUpdate(true);
+        yield return new WaitForSeconds(1);
-    }
 
-    void Update()
+        target.DORotateQuaternion(rotTarget.rotation, 2).SetEase(easeType);
-    {
-        if (Input.GetKey(KeyCode.J))
-        {
-            DOTween.timeScale -= 0.1f;
-        }
-        if (Input.GetKey(KeyCode.K))
-        {
-            DOTween.timeScale += 0.1f;
-        }
-
-        Debug.Log(DOTween.timeScale);
     }
 }

_DOTween.Assembly/DOTween/CustomPlugins/PureQuaternionPlugin.cs

@@ -66,10 +66,11 @@ namespace DG.Tweening.CustomPlugins
         /// <summary>INTERNAL: do not use</summary>
         public override void SetChangeValue(TweenerCore<Quaternion, Quaternion, NoOptions> t)
         {
-            t.changeValue.x = t.endValue.x - t.startValue.x;
+//            t.changeValue.x = t.endValue.x - t.startValue.x;
-            t.changeValue.y = t.endValue.y - t.startValue.y;
+//            t.changeValue.y = t.endValue.y - t.startValue.y;
-            t.changeValue.z = t.endValue.z - t.startValue.z;
+//            t.changeValue.z = t.endValue.z - t.startValue.z;
-            t.changeValue.w = t.endValue.w - t.startValue.w;
+//            t.changeValue.w = t.endValue.w - t.startValue.w;
+            t.changeValue = t.endValue; // Special case where changeValue is equal to endValue so it can be applied better
         }
 
         /// <summary>INTERNAL: do not use</summary>
@@ -87,11 +88,12 @@ namespace DG.Tweening.CustomPlugins
 //                    * (t.sequenceParent.isComplete ? t.sequenceParent.completedLoops - 1 : t.sequenceParent.completedLoops);
 //            }
             float easeVal = EaseManager.Evaluate(t.easeType, t.customEase, elapsed, duration, t.easeOvershootOrAmplitude, t.easePeriod);
-            startValue.x += changeValue.x * easeVal;
+            setter(Quaternion.Slerp(startValue, changeValue, easeVal));
-            startValue.y += changeValue.y * easeVal;
+//            startValue.x += changeValue.x * easeVal;
-            startValue.z += changeValue.z * easeVal;
+//            startValue.y += changeValue.y * easeVal;
-            startValue.w += changeValue.w * easeVal;
+//            startValue.z += changeValue.z * easeVal;
-            setter(startValue);
+//            startValue.w += changeValue.w * easeVal;
+//            setter(startValue);
         }
     }
 }

_DOTween.Assembly/DOTween/DOTween.cs

@@ -32,7 +32,7 @@ namespace DG.Tweening
     public class DOTween
     {
         /// <summary>DOTween's version</summary>
-        public static readonly string Version = "1.2.226"; // Last version before modules: 1.1.755
+        public static readonly string Version = "1.2.230"; // Last version before modules: 1.1.755
 
         ///////////////////////////////////////////////
         // Options ////////////////////////////////////

_DOTween.Assembly/DOTween/ShortcutExtensions.cs

@@ -576,9 +576,9 @@ namespace DG.Tweening
         /// (neither for itself nor if placed inside a LoopType.Incremental Sequence)</para>
         /// </summary>
         /// <param name="endValue">The end value to reach</param><param name="duration">The duration of the tween</param>
-        public static TweenerCore<Quaternion, Quaternion, NoOptions> DORotateQuaternion(this Transform target, Quaternion endValue, float duration)
+        public static TweenerCore<DOQuaternion, DOQuaternion, NoOptions> DORotateQuaternion(this Transform target, Quaternion endValue, float duration)
         {
-            TweenerCore<Quaternion, Quaternion, NoOptions> t = DOTween.To(PureQuaternionPlugin.Plug(), () => target.rotation, x => target.rotation = x, endValue, duration);
+            TweenerCore<DOQuaternion, DOQuaternion, NoOptions> t = DOTween.To(PureQuaternionPlugin.Plug(), () => target.rotation, x => target.rotation = x, endValue, duration);
             t.SetTarget(target);
             return t;
         }