daily update on 20230227 by nitload youmu

2023-02-27 16:56:31 +08:00
parent 770150767b
commit 035fb9a432
25 changed files with 268 additions and 96 deletions
@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace StgSharp.Math
+{
+    public static unsafe partial class VectorCalc
+    {
+        public static float GetAngle(Vec2D vec1, Vec2D vec2)
+        {
+            return Calc.ACos(
+                vec1 * vec2 
+                / (vec1.GetLength() * vec2.GetLength())
+                );
+        }
+
+        public static float GetAngle(Vec3D vec1, Vec3D vec2)
+        {
+            return Calc.ACos(
+                vec1 * vec2
+                / (vec1.GetLength() * vec2.GetLength())
+                );
+        }
+
+    }
+}