Add option to export Live2D Cubism models

AssetStudioUtility/CubismLive2DExtractor/CubismMotion3Json.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace CubismLive2DExtractor
+{
+    public class CubismMotion3Json
+    {
+        public int Version;
+        public SerializableMeta Meta;
+        public SerializableCurve[] Curves;
+        public SerializableUserData[] UserData;
+
+        public class SerializableMeta
+        {
+            public float Duration;
+            public float Fps;
+            public bool Loop;
+            public bool AreBeziersRestricted;
+            public int CurveCount;
+            public int TotalSegmentCount;
+            public int TotalPointCount;
+            public int UserDataCount;
+            public int TotalUserDataSize;
+        };
+
+        public class SerializableCurve
+        {
+            public string Target;
+            public string Id;
+            public List<float> Segments;
+        };
+
+        public class SerializableUserData
+        {
+            public float Time;
+            public string Value;
+        }
+    }
+}