daily update on 20230227 by nitload youmu

源代码/.Net/StgSharp/Vector/Vec2D.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Data.Common;
+using System.Runtime.CompilerServices;
 using System.Text;
 
 namespace StgSharp.Math
@@ -9,15 +10,11 @@ namespace StgSharp.Math
     {
         public float X;
         public float Y;
-        public float Direction;
-        public float Length;
 
         public Vec2D(float x,float y)
         {
             X = x;
             Y = y;
-            Direction = Calc.ATan(X,Y);
-            Length = Calc.Sqrt(X * X + Y * Y);
         }
 
         public bool Equals(Vec2D other)
@@ -93,10 +90,9 @@ namespace StgSharp.Math
             return new Vec2D(vec.X/x, vec.Y/x);
         }
 
-        public float x(Vec2D others)
+        public Vec3D to3D()
         {
-            return this.X * others.Y - this.Y * others.X;
+            return new Vec3D(this.X, this.Y, 0.0f);
         }
-
     }
 }