update unity

build.py

@@ -464,13 +464,12 @@ def copy_dll_unity(config: Config):
         shutil.copy(dll, "unity/Assets/Plugins/x86_64")
     rmtree_f("bin")
 
-    url = f"https://github.com/shinolab/autd3-capi/releases/download/v{version}/autd3-v{version}-macos-unity-universal-shared.tar.gz"
+    url = f"https://github.com/shinolab/autd3-capi/releases/download/v{version}/autd3-v{version}-macos-unity-aarch64-shared.tar.gz"
     urllib.request.urlretrieve(url, "tmp.tar.gz")
     with tarfile.open("tmp.tar.gz", "r:gz") as tar:
         tar.extractall()
     rm_f("tmp.tar.gz")
     for dll in glob.glob("bin/*.dylib"):
-        shutil.copy(dll, "unity/Assets/Plugins/x86_64")
         shutil.copy(dll, "unity/Assets/Plugins/aarch64")
     rmtree_f("bin")
 
@@ -517,8 +516,8 @@ def unity_build(args):
     rmtree_f("unity/Assets/Scripts/bin")
     rmtree_f("unity/Assets/Scripts/native")
     shutil.copy(
-        "src/NativeMethods/DefExt.cs",
-        "unity/Assets/Scripts/NativeMethods/DefExt.cs",
+        "src/NativeMethods/DriverExt.cs",
+        "unity/Assets/Scripts/NativeMethods/DriverExt.cs",
     )
 
     shutil.copy(

src/Driver/Datagram/PulseWidthEncoder.cs

@@ -4,6 +4,10 @@
 using System;
 using System.Collections.Generic;
 
+#if UNITY_2020_2_OR_NEWER
+#nullable enable
+#endif
+
 namespace AUTD3Sharp
 {
     public sealed class PulseWidthEncoder : IDatagram
@@ -33,3 +37,7 @@ DatagramPtr IDatagram.Ptr(Geometry geometry)
         }
     }
 }
+
+#if UNITY_2020_2_OR_NEWER
+#nullable restore
+#endif

src/Driver/Defined/Freq.cs

@@ -1,5 +1,9 @@
 using System;
 
+#if UNITY_2020_2_OR_NEWER
+#nullable enable
+#endif
+
 namespace AUTD3Sharp
 {
     public readonly struct Freq<T> : IEquatable<Freq<T>> where T : struct
@@ -39,3 +43,7 @@ public static partial class Units
         public static UnitHz Hz { get; } = new UnitHz();
     }
 }
+
+#if UNITY_2020_2_OR_NEWER
+#nullable restore
+#endif