ModelTranslator: 审查修复——导出仅选中对象、常量通道日志、--tris 校验、超差警告

Tools/ModelTranslator/bl_decimate.py

@@ -104,11 +104,16 @@ def main():
             cur = len(obj.data.polygons)
             if within_tolerance(target, cur) or cur <= target:
                 break
+        # 重试用尽仍超差且偏多：记录警告，交由上层决定是否可接受
+        if not within_tolerance(target, cur) and cur > target:
+            warnings.append("修正 %d 轮后仍超差：%d 面（目标 %d ±3%%）" % (MAX_RETRY, cur, target))
 
     _smart_unwrap(obj)
     out_dir = os.path.dirname(os.path.abspath(out_fbx))
     os.makedirs(out_dir, exist_ok=True)
-    bpy.ops.export_scene.fbx(filepath=out_fbx, path_mode='STRIP', embed_textures=False)
+    # 仅导出合并后的对象；整场景导出会把 armature/empty 等非 mesh 带进 _low.fbx
+    bpy.ops.export_scene.fbx(filepath=out_fbx, use_selection=True,
+                             path_mode='STRIP', embed_textures=False)
 
     print("MT_SUMMARY " + json.dumps(
         {"src": os.path.basename(src), "fbx": os.path.basename(out_fbx),