githubでwinのbuildが完了しないため.net standard 2.0にrevert

Author: sevendev

wrappers/csharp/LibPLATEAU.NET/CSharpPLATEAU/CSharpPLATEAU.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <!-- Unity向けにクロスプラットフォームで動かしたいので net standard 2.0 を採用します -->
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <!--<ImplicitUsings>enable</ImplicitUsings>-->
     <!--<Nullable>enable</Nullable>-->
 	<AllowUnsafeBlocks>true</AllowUnsafeBlocks>

wrappers/csharp/LibPLATEAU.NET/CSharpPLATEAU/PolygonMesh/TileExtractor.cs

@@ -24,7 +24,7 @@ public static class TileExtractor
         /// </summary>
         public static void ExtractWithGrid(ref Model outModel, CityModel cityModel, MeshExtractOptions options, List<Extent> extents)
         {
-            using var nativeExtents = NativeVectorExtent.Create();
+            var nativeExtents = NativeVectorExtent.Create();
             foreach (var extent in extents)
             {
                 nativeExtents.Add(extent);
@@ -33,6 +33,7 @@ public static void ExtractWithGrid(ref Model outModel, CityModel cityModel, Mesh
             var result = NativeMethods.plateau_tile_extractor_extract_with_grid(
                 cityModel.Handle, options, nativeExtents.Handle, outModel.Handle
             );
+            nativeExtents.Dispose();
             DLLUtil.CheckDllError(result);
         }
 
@@ -45,7 +46,7 @@ public static void ExtractWithGrid(ref Model outModel, CityModel cityModel, Mesh
         /// <param name="extents"></param>
         public static void ExtractWithCombine(ref Model outModel, List<CityModel> cityModels, MeshExtractOptions options, List<Extent> extents)
         {
-            using var nativeExtents = NativeVectorExtent.Create();
+            var nativeExtents = NativeVectorExtent.Create();
             foreach (var extent in extents)
             {
                 nativeExtents.Add(extent);
@@ -56,6 +57,7 @@ public static void ExtractWithCombine(ref Model outModel, List<CityModel> cityMo
             var result = NativeMethods.plateau_tile_extractor_extract_with_combine(
                 nativePtrs, cityModelCount, options, nativeExtents.Handle, outModel.Handle
             );
+            nativeExtents.Dispose();
             DLLUtil.CheckDllError(result);
         }