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源代码/.Net/StgSharp/Vector/Vec2x1.cs

@@ -1,22 +1,24 @@
 using StgSharp.Math;
 using System;
 using System.Collections.Generic;
+using System.Data.Common;
 using System.Text;
 
 namespace StgSharp.Vector
 {
     public struct Vec2D:IEquatable<Vec2D>
     {
-        float X;
-        float Y;
-        float Direction;
-        float Length;
+        public float X;
+        public float Y;
+        public float Direction;
+        public float Length;
 
         public Vec2D(float x,float y)
         {
             X = x;
             Y = y;
-            Direction = 0;
+            Direction = Calc.ATan(X,Y);
+            Length = Calc.Sqrt(X * X + Y * Y);
         }
 
         public bool Equals(Vec2D other)
@@ -77,6 +79,24 @@ namespace StgSharp.Vector
             return new Vec2D(vec1.X + vec2.X, vec1.Y + vec2.Y);
         }
 
-        public static
+        public static float operator *(Vec2D vec1, Vec2D vec2)
+        {
+            return vec1.X * vec2.X + vec1.Y*vec2.Y;
+        }
+
+        public static Vec2D operator *(Vec2D vec, float x)
+        {
+            return new Vec2D(vec.X * x, vec.Y * x);
+        }
+
+        public static Vec2D operator /(Vec2D vec, float x)
+        {
+            return new Vec2D(vec.X/x, vec.Y/x);
+        }
+
+        public float x(Vec2D others)
+        {
+            return this.X * others.Y - this.Y * others.X;
+        }
     }
 }