Sin, cos, tan added

2023-01-24 01:40:37 +08:00
parent 4c5dfb4828
commit 05869ac0ae
28 changed files with 120 additions and 15 deletions
@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace StgSharp
+{
+    public static partial class Math
+    {
+
+        public static float Cos(float x)
+        {
+            float refer = x / 360.0f;
+            refer -= (int)refer;
+
+            refer *= 40;
+            int a = (int)refer;   //大分度，查表
+            refer -= a;    //小分度，拟合
+
+            float refer2 = refer * refer;
+
+
+            return -sinData[a] * (0.1570796327f * refer - 6.459640975e-4f * refer * refer2)
+                + cosData[a] * (1 - 0.0123370055f * refer2 + 2.536695709e-5f * refer2 * refer2);
+        }
+    }
+}