daily update on 20230529 by nitload youmu

源代码/StgSharp/Geometries/PlainGeometry/Square.cs

@@ -1,12 +1,20 @@
-using System;
+using StgSharp.Math;
+using System;
 using System.Collections.Generic;
 using System.Text;
 
 namespace StgSharp.Geometries
 {
+
+    /// <summary>
+    /// A square
+    /// </summary>
     public class Square:Rectangle
     {
-
+        public sealed override vec3d MovVertex02(uint tick)
+        {
+            return this.center.Position * 2 - this.vertex01.Position;
+        }
 
     }
 }