Mesh not correctly plotted

[keurfonluu]

Description

Attached mesh is not correctly plotted with Dash VTK. No issue with ParaView or PyVista.
No problem with simpler meshes with Dash VTK.

mesh.zip

Steps/Code to Reproduce

import dash
import dash_vtk
from dash_vtk.utils import to_mesh_state
import pyvista

mesh = pyvista.read("mesh.dat")
mesh_state = to_mesh_state(mesh)

app = dash.Dash(__name__)
app.layout = dash.html.Div(
 dash_vtk.View(
 dash_vtk.GeometryRepresentation(
 dash_vtk.Mesh(state=mesh_state),
 property={"edgeVisibility": True},
 ),
 cameraPosition=[1005.0, -5000.0, -1500.0],
 cameraViewUp=[0.0, 0.0, 1.0],
 ),
 style={"width": "600px", "height": "600px"},
)

if __name__ == "__main__":
 app.run_server(debug=True)

Expected Results

Actual Results

Versions

dash == 2.0.0
dash_vtk == 0.0.9

[jourdain]

Interesting, it seems that a decimation is happening. I'm wondering if the index encoding for cell connectivity is done on a too small uintXX. I guess I will need to investigate and look at you data. Thanks for sharing...

[jourdain]

I was able to reproduce it and made some test cases for trame. It will require some additional investigation.

So far the server is encoding connectivity using uint16 which might be the issue.

[jourdain]

The issue is actually related to vtkGeometryFilter vs vtkDataSetSurfaceFilter.

If you preprocess your dataset with vtkDataSetSurfaceFilter that will solve your issue. That also mean, that the vtkGeometryFilter[1, 2, 3] should be replaced by vtkDataSetSurfaceFilter inside the dash-vtk code.

[jourdain]

Did a PR for VTK itself. Thanks for reporting such issue.