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blender_glb_to_obj.py

@@ -0,0 +1,48 @@
+import bpy
+import sys
+import os
+
+argv = sys.argv
+argv = argv[argv.index("--") + 1:]
+
+glb_input = argv[0]
+obj_output = argv[1]
+
+
+def clean():
+    bpy.ops.object.select_all(action='SELECT')
+    bpy.ops.object.delete(use_global=False)
+
+
+clean()
+
+bpy.ops.import_scene.gltf(filepath=glb_input)
+
+meshes = [o for o in bpy.context.scene.objects if o.type == "MESH"]
+
+if not meshes:
+    raise RuntimeError("No mesh objects found in GLB/GLTF.")
+
+bpy.ops.object.select_all(action='DESELECT')
+
+for o in meshes:
+    o.select_set(True)
+
+bpy.context.view_layer.objects.active = meshes[0]
+
+if len(meshes) > 1:
+    bpy.ops.object.join()
+
+obj = bpy.context.view_layer.objects.active
+obj.select_set(True)
+
+os.makedirs(os.path.dirname(obj_output), exist_ok=True)
+
+bpy.ops.wm.obj_export(
+    filepath=obj_output,
+    export_selected_objects=True,
+    export_normals=True,
+    export_uv=True,
+)
+
+print("OBJ exported:", obj_output)