Fix: Use bpy.context instead of None in loadFromFile call

code/cube3d/render/render_bricks_safe.py

@@ -5,11 +5,64 @@ from pathlib import Path
 import sys
 import os
 import platform
+import shutil
+import urllib.request
+import zipfile
 from typing import List
 
 root_dir = Path(__file__).resolve().parents[2]
 sys.path.append(str(root_dir))
 
+
+def _download_import_ldraw(target_root: Path) -> Path | None:
+    """
+    Download ImportLDraw from GitHub releases if it wasn't bundled in the repo.
+    Returns the extracted directory or None if download failed.
+    """
+    default_url = (
+        "https://github.com/TobyLobster/ImportLDraw/archive/refs/tags/v1.2.1.zip"
+    )
+    download_url = os.environ.get("IMPORT_LDRAW_DOWNLOAD_URL", default_url)
+    target_dir = target_root / "ImportLDraw_auto"
+
+    print("⚠️  未在项目中找到 ImportLDraw，尝试从 GitHub 下载...")
+    print(f"🌐 下载地址: {download_url}")
+
+    try:
+        with tempfile.TemporaryDirectory(prefix="importldraw_dl_") as tmpdir:
+            tmpdir_path = Path(tmpdir)
+            zip_path = tmpdir_path / "importldraw.zip"
+            urllib.request.urlretrieve(download_url, zip_path)
+            print("✅ 已下载 ImportLDraw 压缩包")
+
+            with zipfile.ZipFile(zip_path, 'r') as zip_ref:
+                zip_ref.extractall(tmpdir_path)
+
+            extracted_root = None
+            for child in tmpdir_path.iterdir():
+                if child.is_dir() and (child / "__init__.py").exists():
+                    extracted_root = child
+                    break
+                if child.is_dir():
+                    potential = child / "ImportLDraw"
+                    if (potential / "__init__.py").exists():
+                        extracted_root = potential
+                        break
+
+            if not extracted_root:
+                print("❌ 无法在压缩包中找到 ImportLDraw 目录")
+                return None
+
+            if target_dir.exists():
+                shutil.rmtree(target_dir)
+            shutil.copytree(extracted_root, target_dir)
+            print(f"✅ ImportLDraw 已下载到: {target_dir}")
+            return target_dir
+    except Exception as download_error:
+        print(f"❌ ImportLDraw 下载失败: {download_error}")
+
+    return None
+
 def _resolve_import_ldraw_dir(additional_roots: List[Path] | None = None) -> Path | None:
     """
     Attempt to locate the bundled ImportLDraw plugin directory.
@@ -27,10 +80,15 @@ def _resolve_import_ldraw_dir(additional_roots: List[Path] | None = None) -> Pat
 
     candidate_dirs.extend([
         code_dir / "ImportLDraw",
+        code_dir / "ImportLDraw_auto",
         repo_root / "ImportLDraw",
+        repo_root / "ImportLDraw_auto",
         repo_root / "code" / "ImportLDraw",
+        repo_root / "code" / "ImportLDraw_auto",
         Path.cwd() / "ImportLDraw",
+        Path.cwd() / "ImportLDraw_auto",
         Path.cwd() / "code" / "ImportLDraw",
+        Path.cwd() / "code" / "ImportLDraw_auto",
     ])
 
     if additional_roots:
@@ -167,6 +225,11 @@ def render_bricks_safe(
         print(f"  ⚠️ 警告：LDraw 库目录不存在！")
 
     import_ldraw_dir = _resolve_import_ldraw_dir()
+    if not import_ldraw_dir:
+        autogenerated_dir = _download_import_ldraw(root_dir)
+        if autogenerated_dir and (autogenerated_dir / "__init__.py").exists():
+            import_ldraw_dir = autogenerated_dir
+
     if not import_ldraw_dir:
         raise FileNotFoundError(
             "未能找到 ImportLDraw 插件目录。请确保 code/ImportLDraw "
@@ -318,8 +381,15 @@ try:
     print("尝试加载LDR文件...")
     ldr_file = FileSystem.locate("{input_file}")
     print(f"找到LDR文件: {{ldr_file}}")
-    loadFromFile(None, ldr_file)
-    print("LDR文件加载成功")
+
+    # 使用 bpy.context 而不是 None，避免 NoneType subscriptable 错误
+    try:
+        loadFromFile(bpy.context, ldr_file)
+        print("LDR文件加载成功")
+    except Exception as load_error:
+        print(f"❌ loadFromFile 失败: {{load_error}}")
+        traceback.print_exc()
+        sys.exit(1)
     
     # 检查加载的对象
     mesh_objects = [obj for obj in bpy.data.objects if obj.type == 'MESH']