Vtk Interactive

import panel as pn
import pyvista as pv

from pyvista import examples

pn.extension('vtk', design='material', sizing_mode='stretch_width', template='material')

pn.state.template.config.raw_css.append("""
#main {
  padding: 0;
}""")

For this example we use the pyvista library to load a dataset and generate easily a VTK scene

m = examples.download_st_helens().warp_by_scalar()

# default camera position
cpos = [
    (567000.9232163235, 5119147.423216323, 6460.423216322832),
    (562835.0, 5114981.5, 2294.5),
    (-0.4082482904638299, -0.40824829046381844, 0.8164965809277649)
]

# pyvista plotter
pl = pv.Plotter(notebook=True);
actor = pl.add_mesh(m, smooth_shading=True, lighting=True)
pl.camera_position = cpos #set camera position

# save initial camera properties
renderer = list(pl.ren_win.GetRenderers())[0]
initial_camera = renderer.GetActiveCamera()
initial_camera_pos = {
    "focalPoint": initial_camera.GetFocalPoint(),
    "position": initial_camera.GetPosition(),
    "viewUp": initial_camera.GetViewUp()
}

# Panel creation using the VTK Scene created by the plotter pyvista
orientation_widget = True
enable_keybindings = True
vtkpan = pn.pane.VTK(
    pl.ren_win, margin=0, sizing_mode='stretch_both', orientation_widget=orientation_widget,
    enable_keybindings=enable_keybindings, min_height=600
)
vtkpan