Add support for spline point duplicate via Transform gizmo

Source/Engine/Level/Actors/Spline.cpp

@@ -169,6 +169,12 @@ float Spline::GetSplineLength() const
     return Math::Sqrt(sum);
 }
 
+float Spline::GetSplineTime(int32 index) const
+{
+    CHECK_RETURN(index >= 0 && index < GetSplinePointsCount(), 0.0f)
+    return Curve[index].Time;
+}
+
 namespace
 {
     void FindTimeClosestToPoint(const Vector3& point, const Spline::Keyframe& start, const Spline::Keyframe& end, float& bestDistanceSquared, float& bestTime)

Source/Engine/Level/Actors/Spline.h

@@ -171,6 +171,13 @@ public:
     /// </summary>
     API_PROPERTY() float GetSplineLength() const;
 
+    /// <summary>
+    /// Gets the time of the spline keyframe.
+    /// </summary>
+    /// <param name="index">The curve keyframe index. Zero-based, smaller than GetSplinePointsCount().</param>
+    /// <returns>The spline time.</returns>
+    API_FUNCTION() float GetSplineTime(int32 index) const;
+
     /// <summary>
     /// Calculates the closest point to the given location and returns the spline time at that point.
     /// </summary>