Exported OBJ file cannot be imported #78533

New Issue

Sybren A. Stüvel · 2020-07-02T15:03:23+02:00

Sybren A. Stüvel commented

2020-07-02 15:03:23 +02:00

Blender version: current soc-2020-io-performance branch, 42a8ea1af3

Expected behaviour:

I expect to be able to export a simple mesh with the new OBJ exporter, and import it with the existing Python-based OBJ importer.

Observed behaviour:

Importing fails with this output on the terminal:

(  0.0001 sec |   0.0001 sec) Importing OBJ '/home/sybren/tmp/obj-export-test.obj'...
  (  0.0006 sec |   0.0001 sec) Parsing OBJ file...
    (  0.0134 sec |   0.0117 sec) Done, loading materials and images...
Progress:  33.33%

Traceback (most recent call last):
  File "/home/sybren/workspace/blender-git/build_linux/bin/2.90/scripts/addons/io_scene_obj/__init__.py", line 146, in execute
    return import_obj.load(context, **keywords)
  File "/home/sybren/workspace/blender-git/build_linux/bin/2.90/scripts/addons/io_scene_obj/import_obj.py", line 1244, in load
    use_image_search, float_func)
  File "/home/sybren/workspace/blender-git/build_linux/bin/2.90/scripts/addons/io_scene_obj/import_obj.py", line 443, in create_materials
    context_material_name, img_data, line, 'Kd')
  File "/home/sybren/workspace/blender-git/build_linux/bin/2.90/scripts/addons/io_scene_obj/import_obj.py", line 187, in load_material_image
    _generic_tex_set(mat_wrap.base_color_texture, image, 'UV', map_offset, map_scale)
  File "/home/sybren/workspace/blender-git/build_linux/bin/2.90/scripts/addons/io_scene_obj/import_obj.py", line 183, in _generic_tex_set
    nodetex.scale = scale
  File "/home/sybren/workspace/blender-git/build_linux/bin/2.90/scripts/modules/bpy_extras/node_shader_utils.py", line 36, in wrapper
    return func(self, *args, **kwargs)
  File "/home/sybren/workspace/blender-git/build_linux/bin/2.90/scripts/modules/bpy_extras/node_shader_utils.py", line 822, in scale_set
    self.node_mapping.inputs['Scale'].default_value = scale
ValueError: bpy_struct: item.attr = val: sequences of dimension 0 should contain 3 items, not 2

location: <unknown location>:-1

To reproduce:

Open the attached blend file.
Export with the New OBJ exporter, all options at their default values.
Import with the Wavefront OBJ importer.
See the error.

Here are the blend file:

obj-export-test.blend

and the OBJ+MTL file that were exported:
obj-export-test.obj

obj-export-test.mtl

**Blender version:** current `soc-2020-io-performance` branch, 42a8ea1af3 **Expected behaviour:** I expect to be able to export a simple mesh with the new OBJ exporter, and import it with the existing Python-based OBJ importer. **Observed behaviour:** Importing fails with this output on the terminal: ``` ( 0.0001 sec | 0.0001 sec) Importing OBJ '/home/sybren/tmp/obj-export-test.obj'... ( 0.0006 sec | 0.0001 sec) Parsing OBJ file... ( 0.0134 sec | 0.0117 sec) Done, loading materials and images... Progress: 33.33% Traceback (most recent call last): File "/home/sybren/workspace/blender-git/build_linux/bin/2.90/scripts/addons/io_scene_obj/__init__.py", line 146, in execute return import_obj.load(context, **keywords) File "/home/sybren/workspace/blender-git/build_linux/bin/2.90/scripts/addons/io_scene_obj/import_obj.py", line 1244, in load use_image_search, float_func) File "/home/sybren/workspace/blender-git/build_linux/bin/2.90/scripts/addons/io_scene_obj/import_obj.py", line 443, in create_materials context_material_name, img_data, line, 'Kd') File "/home/sybren/workspace/blender-git/build_linux/bin/2.90/scripts/addons/io_scene_obj/import_obj.py", line 187, in load_material_image _generic_tex_set(mat_wrap.base_color_texture, image, 'UV', map_offset, map_scale) File "/home/sybren/workspace/blender-git/build_linux/bin/2.90/scripts/addons/io_scene_obj/import_obj.py", line 183, in _generic_tex_set nodetex.scale = scale File "/home/sybren/workspace/blender-git/build_linux/bin/2.90/scripts/modules/bpy_extras/node_shader_utils.py", line 36, in wrapper return func(self, *args, **kwargs) File "/home/sybren/workspace/blender-git/build_linux/bin/2.90/scripts/modules/bpy_extras/node_shader_utils.py", line 822, in scale_set self.node_mapping.inputs['Scale'].default_value = scale ValueError: bpy_struct: item.attr = val: sequences of dimension 0 should contain 3 items, not 2 location: <unknown location>:-1 ``` To reproduce: - Open the attached blend file. - Export with the New OBJ exporter, all options at their default values. - Import with the Wavefront OBJ importer. - See the error. Here are the blend file: [obj-export-test.blend](https://archive.blender.org/developer/F8659725/obj-export-test.blend) and the OBJ+MTL file that were exported: [obj-export-test.obj](https://archive.blender.org/developer/F8659726/obj-export-test.obj) [obj-export-test.mtl](https://archive.blender.org/developer/F8659727/obj-export-test.mtl)

Ankit Meel was assigned by Sybren A. Stüvel

2020-07-02 15:03:23 +02:00

Sybren A. Stüvel commented

2020-07-02 15:03:23 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'