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 +1,66 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace StgSharp.Math
+{
+    public struct Array2x2
+    {
+        public Vec2D row0;
+        public Vec2D row1;
+
+        public Vec2D colum0;
+        public Vec2D colum1;
+
+        public Array2x2(Vec2D c0, Vec2D c1)
+        {
+            row0 = c0;
+            row1 = c1;
+            colum0 = new Vec2D(c0.X,c1.X);
+            colum1 = new Vec2D(c0.Y,c1.Y);
+        }
+
+        public Array2x2(
+            float a11,
+            float a12,
+            float a21,
+            float a22
+            )
+        {
+            row0 = new Vec2D(a11, a12);
+            row1 = new Vec2D(a21, a22);
+
+            colum0 = new Vec2D(a11, a21);
+            colum1 = new Vec2D(a21, a22);
+        }
+
+        public static Array2x2 operator *(Array2x2 array1, Array2x2 array2)
+        {
+            return new Array2x2(
+                array1.colum0 * array2.row0,
+                array1.colum1 * array2.row0,
+                array1.colum0 * array2.row1,
+                array1.colum1 * array2.row1
+                );
+        }
+
+        public static Array2x2 operator +(Array2x2 array1, Array2x2 array2)
+        {
+            return new Array2x2(
+                array1.row0 + array2.row0,
+                array1.row1 + array2.row1
+                );
+        }
+
+        public static Array2x2 operator -(Array2x2 array1, Array2x2 array2)
+        {
+            return new Array2x2(
+                array1.row0 - array2.row0,
+                array1.row1 - array2.row1
+                );
+        }
+
+        
+
+    }
+}