更新

WPFDark/Internals/MathF.cs

@@ -0,0 +1,25 @@
+#if !NETCOREAPP3_1
+using System;
+using System.Runtime.CompilerServices;
+
+namespace WPFDark.Internals
+{
+    internal static class MathF
+    {
+        // ReSharper disable once InconsistentNaming
+        public const float PI = 3.14159265358979f;
+        
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static float Sqrt(float d) => (float) Math.Sqrt(d);
+        
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static float Atan2(float y, float x) => (float) Math.Atan2(y, x);
+        
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static float Sin(float a) => (float) Math.Sin(a);
+        
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static float Cos(float a) => (float) Math.Cos(a);
+    }
+}
+#endif