MulAvailable

2025-12-16 23:13:17 +08:00
parent 28ea5d1d1e
commit 3486375470
2637 changed files with 23787 additions and 838773 deletions
@@ -0,0 +1,130 @@
+//-----------------------------------------------------------------------
+// -----------------------------------------------------------------------
+// file="Random"
+// Project: StgSharp
+// AuthorGroup: Nitload
+// Copyright (c) Nitload. All rights reserved.
+//     
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//     
+// -----------------------------------------------------------------------
+// -----------------------------------------------------------------------
+using StgSharp.Mathematics;
+
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Numerics;
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace StgSharp.Mathematics
+{
+    public static unsafe partial class Scalar
+    {
+
+        private static byte[] randomSeed;
+
+        internal static float currentSeed
+#if DEBUG    
+            = 0.5f;
+
+        #else
+        = Abs(System.DateTime.UtcNow.GetHashCode());
+        #endif
+
+        /// <summary>
+        ///   returns a random float number between 0 and 1.
+        /// </summary>
+        /// <returns>
+        ///
+        /// </returns>
+        public static unsafe float LowProceisionRandom()
+        {
+            float seed = currentSeed;
+
+            float sample = Scalar.Pow(Scalar.SeedSqrt(seed), 2);
+            float sample2 = (sample - seed) / seed;
+            sample2 = Scalar.Abs(sample2);
+
+            if (sample == 1) {
+                sample = sample2;
+            }
+
+            currentSeed = sample;
+            sample2 *= 1000000;
+
+            float result = sample2 - ((int)sample2);
+            if (result == 0)
+            {
+                currentSeed = sample2 + 0.1f;
+                result = Scalar.LowProceisionRandom();
+            }
+            return result;
+        }
+
+        /// <summary>
+        ///
+        /// </summary>
+        /// <returns>
+        ///
+        /// </returns>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static T Random<T>() where T: unmanaged, IConvertible, INumber<T>
+
+        {
+            if (randomSeed == null)
+            {
+                randomSeed = new byte[64];
+                string originSeed =
+                    ($"{((Assembly.GetEntryAssembly() == null) ? (Assembly.GetAssembly(typeof(World))!) :
+                    Assembly.GetEntryAssembly())}") + ($"{DateTime.UtcNow.ToString("o")}");
+                using (SHA256 sha = SHA256.Create()) {
+                    randomSeed = sha.ComputeHash(Encoding.UTF8.GetBytes(originSeed));
+                }
+            }
+            using (SHA256 sha = SHA256.Create()) {
+                randomSeed = sha.ComputeHash(randomSeed);
+            }
+            fixed (byte* bptr = randomSeed) {
+                return *(T*)bptr;
+            }
+        }
+
+        /// <summary>
+        ///   Generates a random seed in int value.
+        /// </summary>
+        /// <returns>
+        ///
+        /// </returns>
+        public static unsafe int RandomSeed()
+        {
+            float seedValue1 = LowProceisionRandom();
+            float seedValue2 = LowProceisionRandom();
+            uint seedValueBits = *(uint*)&seedValue1;
+
+            float seedValue = seedValueBits * seedValue2;
+
+            return *(int*)&seedValue;
+        }
+
+    }
+}