Sin, cos, tan added

源代码/.Net/StgSharp/Math/Cos.cs

@@ -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);
+        }
+    }
+}

源代码/.Net/StgSharp/Math/Log.cs

@@ -39,7 +39,10 @@ namespace StgSharp
         /// </returns>
         public unsafe static float Log(float x)
         {
-
+            if (x<0)
+            {
+                throw new ArgumentException();
+            }
             uint input = *(uint*)&x;
 
             uint f = input;
@@ -62,6 +65,13 @@ namespace StgSharp
                 result + 
                 logArray[order];
         }
-        
+
+
+        public static float Log(float x, float y)
+        {
+            return Log(x)/Log(y);
+        }
+
+
     }
 }

源代码/.Net/StgSharp/Math/Sin.cs

@@ -6,6 +6,47 @@ namespace StgSharp
 {
     public static partial class Math
     {
+        private static readonly float[] sinData =
+            {
+            0f, 0.15643446239373f,  0.309016989278255f, 0.453990492577218f, 0.587785243621462f,
+            0.707106771713121f, 0.80901698492516f,  0.891006515673128f, 0.951056509671091f, 0.987688336822657f,
+            1f, 0.987688345205947f, 0.951056526231247f, 0.891006540002384f, 0.80901701642445f,
+            0.707106809606826f, 0.587785286976515f, 0.453990540326073f, 0.309017040245177f, 0.156434515323744f,
+            5.35897931701074E-08f,  -0.156434409463716f,    -0.309016938311333f,    -0.453990444828362f,    -0.587785200266408f,
+            -0.707106733819413f,    -0.809016953425868f,    -0.891006491343869f,    -0.951056493110931f,    -0.987688328439363f,
+            -0.999999999999997f,    -0.987688353589235f,    -0.951056542791401f,    -0.891006564331638f,    -0.809017047923737f,
+            -0.70710684750053f, -0.587785330331566f,    -0.453990588074927f,    -0.309017091212098f,    -0.156434568253757f,
 
+
+        };
+        private static readonly float[] cosData =
+            {
+            1f, 0.987688341014302f, 0.951056517951169f, 0.891006527837756f, 0.809017000674805f,
+            0.707106790659974f, 0.587785265298989f, 0.453990516451646f, 0.309017014761716f, 0.156434488858737f,
+            2.67948965850537E-08f,  -0.156434435928723f,    -0.309016963794794f,    -0.453990468702791f,    -0.587785221943935f,
+            -0.707106752766267f,    -0.809016969175515f,    -0.891006503508499f,    -0.951056501391011f,    -0.98768833263101f,
+            -0.999999999999999f,    -0.987688349397591f,    -0.951056534511324f,    -0.891006552167012f,    -0.809017032174094f,
+            -0.707106828553679f,    -0.587785308654041f,    -0.4539905642005f,  -0.309017065728638f,    -0.156434541788751f,
+            -8.03846893110719E-08f, 0.156434382998709f, 0.309016912827872f, 0.453990420953934f, 0.58778517858888f,
+            0.707106714872559f, 0.809016937676222f, 0.891006479179238f, 0.951056484830851f, 0.987688324247716f,
+
+
+        };
+
+        public static unsafe float Sin(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]*(1 - 0.0123370055f * refer2 + 2.536695709e-5f * refer2 * refer2 ) 
+                + cosData[a] * (0.1570796327f * refer - 6.459640975e-4f * refer * refer2);
+        }
     }
 }

源代码/.Net/StgSharp/Math/Tan.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace StgSharp
+{
+    public static partial class Math
+    {
+
+        public static float Tan(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;
+
+            float sin = (0.1570796327f * refer - 6.459640975e-4f * refer * refer2);
+            float cos = (1 - 0.0123370055f * refer2 + 2.536695709e-5f * refer2 * refer2);
+
+            return ( sinData[a] * cos + cosData[a] * sin )
+                / ( cosData[a] * cos - sinData[a] * sin );
+        }
+    }
+}

源代码/.Net/StgSharp/obj/Debug/netstandard2.1/StgSharp.csproj.CoreCompileInputs.cache

@@ -1 +1 @@
-9f6c1da9ad577916e70408e10ff0292581a33dcb
+db0ba6dd25ed071a0f5414145ab29a83438c6530

源代码/.Net/StgSharpDebug/Program.cs

@@ -11,14 +11,12 @@ internal class Program
         Console.WriteLine(cc/2);
         /**/
 
+        
         /*
-        float aa = 261.2776027f;
-        uint bb = *(uint*)&aa;
-        Console.WriteLine(Convert.ToString(bb,toBase:2));
-        Console.WriteLine(StgSharp.Math.Log(3.5f));
+        Console.WriteLine(StgSharp.Math.Sin(1.06f));
         /**/
 
-        
+        /*
         for (int wasd = 0; wasd < 100; wasd++)
         {
             float time = 1000000;
@@ -27,7 +25,7 @@ internal class Program
             stopwatch.Start(); //  开始监视代码运行时间
             for (float i = 2; i < time; i++)
             {
-                a = StgSharp.Math.Log(i);
+                a = StgSharp.Math.Tan(i);
             }
             stopwatch.Stop(); //  停止监视
             TimeSpan timespan = stopwatch.Elapsed; //  获取当前实例测量得出的总时间
@@ -41,7 +39,7 @@ internal class Program
             stopwatch1.Start();
             for (double i = 2; i < time2; i++)
             {
-                b = System.Math.Log(i);
+                b = System.Math.Tan(i);
             }
             stopwatch1.Stop();
             timespan = stopwatch1.Elapsed;
@@ -51,13 +49,13 @@ internal class Program
         }
         /**/
 
-        /*
+        
         double accuracy = 0;
-        for (float i = 1.001f; i < 4; i += 0.001f)
+        for (float i = 1f; i < 4000000; i += 1f)
         {
-            double r1 = StgSharp.Math.Log(i);
-            double r2 = System.Math.Log(i);
-            double ac = ( System.Math.Max(r1,r2)- System.Math.Min(r1, r2) ) / System.Math.Max(r1, r2);
+            double r1 = StgSharp.Math.Sin(i);
+            double r2 = System.Math.Sin(i *  ( 2 * System.Math.PI) / 360);
+            double ac = ( System.Math.Max(r1,r2)- System.Math.Min(r1, r2) ) / r2;
             if (ac>accuracy)
             {
                 accuracy = ac;
@@ -70,6 +68,8 @@ internal class Program
         }
         Console.WriteLine(accuracy);
         /**/
+
+        
     }