private void RemapMaterials()
{
if (ValidateSelection())
{
foreach (GameObject obj in Selection.GetFiltered(typeof(GameObject), SelectionMode.Assets))
{
string path = AssetDatabase.GetAssetPath(obj);
ModelImporter modelImporter = AssetImporter.GetAtPath(path) as ModelImporter;
modelImporter.materialImportMode = ModelImporterMaterialImportMode.ImportViaMaterialDescription;
modelImporter.materialLocation = ModelImporterMaterialLocation.InPrefab;
modelImporter.materialName = ModelImporterMaterialName.BasedOnModelNameAndMaterialName;
modelImporter.materialSearch = ModelImporterMaterialSearch.Local;
var sourceMaterials = typeof(ModelImporter).GetProperty("sourceMaterials", BindingFlags.NonPublic | BindingFlags.Instance)?.GetValue(modelImporter) as AssetImporter.SourceAssetIdentifier[];
foreach (var identifier in sourceMaterials ?? Enumerable.Empty <AssetImporter.SourceAssetIdentifier>())
{
if (materialToAssign.TryGetValue(identifier.name, out Material result))
{
modelImporter.AddRemap(identifier, result);
}
else
{
string newPath = path.Replace(obj.name + ".fbx", "");
newPath += "Materials/" + obj.name + "-" + identifier.name + ".mat";
modelImporter.materialLocation = ModelImporterMaterialLocation.External;
SaveReimport();
modelImporter.materialLocation = ModelImporterMaterialLocation.InPrefab;
Material extractedMat = (Material)AssetDatabase.LoadAssetAtPath(newPath, typeof(Material));
modelImporter.AddRemap(identifier, extractedMat);
Debug.Log("Some Materials Were Not Assigned. Extracting Material from FBX at " + newPath);
}
}
SaveReimport();
}
}
}
public static void ExportMeshFilterToObjFile(MeshFilter meshFilter, string fullObjFilePath)
{
var outputFolder = Path.GetDirectoryName(fullObjFilePath);
var objFileName = Path.GetFileName(fullObjFilePath);
var objFileNameNoExtension = Path.GetFileNameWithoutExtension(fullObjFilePath);
var objAssetPath = GetAssetPath(fullObjFilePath);
// Write out the Obj file
File.WriteAllText(fullObjFilePath, MeshFilterToString(meshFilter, objFileNameNoExtension));
// Write out the materials file
var materialNames = meshFilter.GetComponent <MeshRenderer>().sharedMaterials.Select(x => x.name).ToList();
File.WriteAllText(Path.Combine(outputFolder, objFileNameNoExtension) + ".mtl", string.Concat(materialNames.Select(x => $"newmtl {x}\n")));
// Import the Obj file
AssetDatabase.Refresh();
AssetDatabase.ImportAsset(objAssetPath);
// Updating the Obj import settings and reimporting
ModelImporter importer = (ModelImporter)ModelImporter.GetAtPath(objAssetPath);
if (importer)
{
importer.importNormals = ModelImporterNormals.Calculate;
importer.optimizeMeshPolygons = true;
importer.optimizeMeshVertices = true;
foreach (var material in meshFilter.GetComponent <MeshRenderer>().sharedMaterials)
{
importer.AddRemap(new AssetImporter.SourceAssetIdentifier(material), material);
}
EditorUtility.SetDirty(importer);
importer.SaveAndReimport();
}
}
