Vedo: Exported x3d looks weird

[FedeClaudi]

Hi Marco,

I tried exporting a brainrender scene to embed it within a web page, but it renders weird: depending on how I move the camera around different objects are rendered.

I am no familiar at all with x3d, so I don't even know if this is something with vtkplotter or x3d or something else still, but I was hoping you'd have some advice on this?

This is just a first test but I'd love to start hosting brainrender scenes online to let people play around with it before committing to actually installing it, so having this feature working perfectly would be very important.

[marcomusy]

Hi Federico, the X3D exporting is almost completely delegated to the class
https://vtk.org/doc/nightly/html/classvtkX3DExporter.html
used in this part of the vtkplotter.vtkio code.
You can play with some parameter but i'm not quite sure that it might fix the issue..
Another option is to import the meshes in a notebook with k3d and then export the rendering window from within the menu (inside the k3d rendering).
The result is something like this.
You can save the full scene with pressing E or - programmatically with
exportWindow('scene.npy')
Then load it back in jupyter and finally export the html page.

[FedeClaudi]

Wow I had no idea you could export it with controls like that!

This is so great, I was just planning some expansions for brainrender and this is exactly the feature that I needed, awesome!

I will try the solution you've proposed then, thanks :)

[FedeClaudi]

That did it:

https://fedeclaudi.github.io/brainrender.html

Thank you once again :)

[marcomusy]

...actually this seems to work as a script even outside jupyter:

from vtkplotter import load, datadir, settings, show

settings.notebookBackend= 'k3d'

s1 = load(datadir+'shuttle.obj').normalize().alpha(0.5).c('b').rotateZ(-90).x(5)
s2 = load(datadir+'porsche.ply').normalize().alpha(1).c('dg').wireframe().x(2)

plt = show(s1,s2, axes=1)

with open('page.html','w') as fp:
    fp.write(plt.get_snapshot())

[FedeClaudi]

That's great.

By the way in both notebooks and outside of jupyter creating the plotter window in full screen ( by passing size='full' to Plotter) gives an error:

  File "/Users/federicoclaudi/Documents/Github/BrainRender/workspace.py", line 27, in <module>
    vp = show(*scene.get_actors(), axes=1)
  File "/Users/federicoclaudi/miniconda3/envs/brainrender/lib/python3.7/site-packages/vtkplotter/plotter.py", line 306, in show
    q=q,
  File "/Users/federicoclaudi/miniconda3/envs/brainrender/lib/python3.7/site-packages/vtkplotter/plotter.py", line 1477, in show
    return backends.getNotebookBackend(actors2show, zoom, viewup)
  File "/Users/federicoclaudi/miniconda3/envs/brainrender/lib/python3.7/site-packages/vtkplotter/backends.py", line 57, in getNotebookBackend
    height=int(vp.size[1]/2) )
TypeError: unsupported operand type(s) for /: 'str' and 'int'

Not a big problem but I thought I'd flag it.

[FedeClaudi]

I'm also getting this error when using your code:

  File "/Users/federicoclaudi/Documents/Github/BrainRender/workspace.py", line 45, in <module>
    fp.write(plt.get_snapshot())
AttributeError: 'Plot' object has no attribute 'get_snapshot'

[I've updated to the latest release of vtkplotter]

[marcomusy]

the first one is a bug! for the second try:
pip install -U k3d
python3 -c "import k3d; print(k3d.__version__)"

2.7.4

[FedeClaudi]

Yep that was the problem, I had version 2.7.0, thank you!

[FedeClaudi]

Hi Marco,

I'm having problems with exporting to .html again.
It all runs smoothly, but when I open the .html I see this:

And the error in the console is:

I haven't changed anything with brainrender that could've broken this so I am at a loss?
I'm using k3d version 2.7.0 and the latest vtkplotter from the master branch.

[marcomusy]

uhmm, maybe i did something bad in the master version... what if you use
pip install vtkplotter==2020.3.0

[FedeClaudi]

I get the same. Does it work for you?

I've tried this code https://github.com/marcomusy/vtkplotter/issues/136#issuecomment-622644655 and I get the same error. The axes get loaded correctly but not the objects.

[marcomusy]

I get the same. Does it work for you?

I've tried this code #136 (comment) and I get the same error. The axes get loaded correctly but not the objects.

Yes it works for me with the master version.
are you using chrome? it seems related to the browser (?)

[FedeClaudi]

mmm no it does the same in chrome and firefox.

I've found the error, I must have at some point updated k3d to version 2.8.1, when I downgraded back to 2.7.4 it worked fine.

[marcomusy]

good to know, it might be that the get_snapshot() method is broken in k3d ==2.8.1