Add Spline

Source/Engine/Level/Spline.cs

@@ -0,0 +1,41 @@
+// Copyright (c) 2012-2021 Wojciech Figat. All rights reserved.
+
+using System;
+using System.Runtime.InteropServices;
+
+namespace FlaxEngine
+{
+    partial class Spline
+    {
+        private BezierCurve<Transform>.Keyframe[] _keyframes;
+
+        /// <summary>
+        /// Gets or sets the spline keyframes collection.
+        /// </summary>
+        [Unmanaged]
+        [Tooltip("Spline keyframes collection.")]
+        [EditorOrder(10), EditorDisplay("Spline"), Collection(CanReorderItems = false)]
+        public BezierCurve<Transform>.Keyframe[] SplineKeyframes
+        {
+            get
+            {
+                var count = SplinePointsCount;
+                if (_keyframes == null || _keyframes.Length != count)
+                    _keyframes = new BezierCurve<Transform>.Keyframe[count];
+#if !BUILD_RELEASE
+                if (Marshal.SizeOf(typeof(BezierCurve<Transform>.Keyframe)) != Transform.SizeInBytes * 3 + sizeof(float))
+                    throw new Exception("Invalid size of BezierCurve keyframe " + Marshal.SizeOf(typeof(BezierCurve<Transform>.Keyframe)) + " bytes.");
+#endif
+                Internal_GetKeyframes(__unmanagedPtr, _keyframes);
+                return _keyframes;
+            }
+            set
+            {
+                if (value == null)
+                    value = Utils.GetEmptyArray<BezierCurve<Transform>.Keyframe>();
+                _keyframes = null;
+                Internal_SetKeyframes(__unmanagedPtr, value);
+            }
+        }
+    }
+}