daily update on 20240610 by nitload youmu

源代码/StgSharp/Math/Linear/Cordination.cs

@@ -31,10 +31,6 @@
 namespace StgSharp.Math
 {
 
-    internal class Coordination
-    {
-    }
-
     public enum CoordinatePlain
     {
         XY,

源代码/StgSharp/Math/Linear/vec3d.cs

@@ -200,6 +200,18 @@ namespace StgSharp.Math
             return v;
         }
 
+        public unsafe vec2d XY
+        {
+            get => new vec2d(this.vec);
+            set
+            {
+                fixed (Vector3* vptr = &v)
+                {
+                    *(Vector2*)vptr = value.v;
+                }
+            }
+        }
+
     }
 
     public static class Vec3d