Asking about the visualization code

[ngoductuanlhp]

Hi @henry123-boy

Thank you for your great work!

I'm currently try to visualize the 3D trajectory using your Blender script. Could you clarify which Blender version you are using? I encounter several errors due to the incompatible Blender version.

Thanks.

[cherubicXN]

Blender 4.0 is used for 3D trajectory visualization

[AstroTheKat]

@cherubicXN thank you for this project and the tip!

Is there any chance you could provide some step-by-step instructions for setting up Blender to render the 3D trajectories via create.py? The command given in the README suggests one can use Blender on MacOS to do this, but there are a few details missing. For example, packages like trimesh and matplotlib need to be installed using Blender's versions of Python and pip.

Regarding the version of Blender needed, I'm not sure 4.0 would work with create.py, unless I'm missing something. For example, bpy.ops.import_mesh.ply was removed in Blender 4.0, and probably needs to be replaced with bpy.ops.wm.ply_import. See links below for more on this:

• https://blender.stackexchange.com/questions/51510/is-it-possible-to-read-a-ply-format-file-using-python-code-in-blender
• https://developer.blender.org/docs/release_notes/4.0/import_export/

Otherwise, I get the error: AttributeError: Calling operator "bpy.ops.import_mesh.ply" error, could not be found

[a-mirecki]

Hey @AstroTheKat I've been there, you have a different version thus should replace line 58:

bpy.ops.wm.ply_import(filepath=str(ply_path))
basename = basename.split('\\')[-1]

with

bpy.ops.import_mesh.ply(filepath=str(ply_path),use_verts=True)

then you need to open blender, go to scripting, open console and for each module do

import pip
pip.main([“install”, “trimesh”])

for each module. Lmk whether that was it

[Boey-li]

@cherubicXN @a-mirecki Hello, thanks for your help! I have implemented as you suggested and I still have a bug

  File "/Users/baoyu/research/visualizer/create.py", line 62, in <module>
    obj = bpy.data.objects[basename]
KeyError: 'bpy_prop_collection[key]: key "assets/sintel_bandage_3d_2" not found'

Have you met this issue before? And the blender did not have tracking animation shown in the repo:

https://github.com/user-attachments/assets/43a0acea-7f26-43ae-ba8d-5c5158f8ec3f

[boytjj]

https://github.com/TombstoneTumbleweedArt/import-ply-as-verts check this