daily update on 20230301 by nitload youmu, file struct cahnged and more vec func added

2023-03-02 01:30:46 +08:00
parent d09105c9c1
commit bb71567e51
594 changed files with 368 additions and 2601 deletions
@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace StgSharp.Math
+{
+    public static unsafe partial class VectorCalc
+    {
+
+        public static float Det(Array2x2 array)
+        {
+            return Cross(array.row1,array.row2);
+        }
+
+        public static unsafe float Det(Array3x3 array)
+        {
+            float* p = &array.row1.X;
+
+            Array2x2 array1 = new Array2x2(
+                *(p + 4), *(p + 5),
+                *(p + 7), *(p + 8)
+                );
+            Array2x2 array2 = new Array2x2(
+                *(p + 3), *(p + 5),
+                *(p + 6), *(p + 8)
+                );
+            Array2x2 array3 = new Array2x2(
+                *(p + 3), *(p + 4),
+                *(p + 6), *(p + 7)
+                );
+
+            return 
+                *p * Det(array1)
+                - *(p + 1) * Det(array2)
+                + *(p + 2) * Det(array3)
+                ;
+        }
+    }
+}