ModelTranslator: reuse unity_assets.safe_name in bl_convert, hoist stdlib imports

Tools/ModelTranslator/bl_convert.py

@@ -1,8 +1,18 @@
 """Blender 内运行：FBX -> 纯模型 FBX + XPbr 基础/混合贴图。
 调用：blender -b --factory-startup --python bl_convert.py -- <src.fbx> <outdir> <max_size>
 """
+import os
+import re
+import sys
+
 import numpy as np
 
+# blender --python 不会把脚本目录加入 sys.path，手动加入以复用 unity_assets（纯 stdlib）
+sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
+from unity_assets import safe_name
+
+AO_NAME_RE = re.compile(r"(ao|occlusion|ambient)", re.I)
+
 
 def encode_normal_rg(n):
     """切线法线 (N,3) -> 球面编码 (N,2)，范围 [0,1]。
@@ -25,14 +35,8 @@ def decode_sphere_map(enc01):
 
 # ---------------- 以下仅在 Blender 内执行 ----------------
 
-AO_NAME_RE = None  # 延迟编译，见 _looks_like_ao
-
 
 def _looks_like_ao(name):
-    import re
-    global AO_NAME_RE
-    if AO_NAME_RE is None:
-        AO_NAME_RE = re.compile(r"(ao|occlusion|ambient)", re.I)
     return bool(AO_NAME_RE.search(name))
 
 
@@ -143,7 +147,6 @@ def _save_png(path, rgba, srgb_view=False):
 
 
 def _convert_material(mat, model_name, outdir, max_size):
-    import os
     warnings = []
     maps, consts = _material_maps(mat, warnings)
     tw, th = _target_size(maps, max_size)
@@ -189,8 +192,7 @@ def _convert_material(mat, model_name, outdir, max_size):
     else:
         mix[..., 3] = consts["roughness"]
 
-    import re
-    sname = re.sub(r"[^0-9A-Za-z_\-]", "_", mat.name).strip("_") or "mat"
+    sname = safe_name(mat.name)
     base_png = os.path.abspath(os.path.join(outdir, "%s_%s_base.png" % (model_name, sname)))
     mix_png = os.path.abspath(os.path.join(outdir, "%s_%s_mix.png" % (model_name, sname)))
     _save_png(base_png, base)
@@ -223,7 +225,7 @@ def _strip_textures():
 
 
 def main():
-    import bpy, json, os, sys
+    import bpy, json
     argv = sys.argv[sys.argv.index("--") + 1:]
     src, outdir, max_size = argv[0], argv[1], int(argv[2])
     os.makedirs(outdir, exist_ok=True)