UniVRM/Assets/VRM10/Editor/ScriptedImporter/VrmScriptedImporterImpl.cs

using System.Linq;
using UnityEngine;
using UniGLTF;
using System;
using VRMShaders;
#if UNITY_2020_2_OR_NEWER
using UnityEditor.AssetImporters;
#else
using UnityEditor.Experimental.AssetImporters;
#endif


namespace UniVRM10
{
    public static class VrmScriptedImporterImpl
    {
        static IMaterialDescriptorGenerator GetMaterialDescriptorGenerator(RenderPipelineTypes renderPipeline)
        {
            switch (renderPipeline)
            {
                case RenderPipelineTypes.BuiltinRenderPipeline:
                    return new Vrm10MaterialDescriptorGenerator();

                case RenderPipelineTypes.UniversalRenderPipeline:
                    return new Vrm10UrpMaterialDescriptorGenerator();

                default:
                    throw new NotImplementedException();
            }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="scriptedImporter"></param>
        /// <param name="context"></param>
        /// <param name="migrateToVrm1">vrm0 だった場合に vrm1 化する</param>
        /// <param name="renderPipeline"></param>
        /// <param name="doNormalize">normalize する</param>
        public static void Import(ScriptedImporter scriptedImporter, AssetImportContext context, bool migrateToVrm1, RenderPipelineTypes renderPipeline, bool doNormalize)
        {
#if VRM_DEVELOP
            Debug.Log("OnImportAsset to " + scriptedImporter.assetPath);
#endif

            using (var data = Vrm10Data.ParseOrMigrate(scriptedImporter.assetPath, migrateToVrm1, out Vrm10Data result, out MigrationData migration))
            {
                if (result == null)
                {
                    // fail to parse vrm1
                    return;
                }

                //
                // Import(create unity objects)
                //
                var extractedObjects = scriptedImporter.GetExternalObjectMap()
                    .Where(kv => kv.Value != null)
                    .ToDictionary(kv => new SubAssetKey(kv.Value.GetType(), kv.Key.name), kv => kv.Value);

                var materialGenerator = GetMaterialDescriptorGenerator(renderPipeline);

                using (var loader = new Vrm10Importer(result, extractedObjects,
                    materialGenerator: materialGenerator,
                    doNormalize: doNormalize))
                {
                    // settings TextureImporters
                    foreach (var textureInfo in loader.TextureDescriptorGenerator.Get().GetEnumerable())
                    {
                        VRMShaders.TextureImporterConfigurator.Configure(textureInfo, loader.TextureFactory.ExternalTextures);
                    }

                    var loaded = loader.Load();
                    loaded.ShowMeshes();

                    loaded.TransferOwnership((key, o) =>
                    {
                        context.AddObjectToAsset(key.Name, o);
                    });
                    var root = loaded.Root;
                    GameObject.DestroyImmediate(loaded);

                    context.AddObjectToAsset(root.name, root);
                    context.SetMainObject(root);
                }
            }
        }
    }
}