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r"""
Installation requirements:
pip install trame trame-vuetify trame-vtk vtk
"""
import tempfile
from urllib.error import HTTPError
from urllib.request import urlretrieve
import vtkmodules.vtkRenderingOpenGL2 # noqa
from vtkmodules.vtkFiltersGeometry import vtkGeometryFilter
# VTK imports
from vtkmodules.vtkIOXML import vtkXMLUnstructuredGridReader
from vtkmodules.vtkRenderingCore import (
vtkActor,
vtkDataSetMapper,
vtkRenderer,
vtkRenderWindow,
)
# Trame imports
from trame.app import get_server
from trame.ui.vuetify3 import SinglePageLayout
from trame.widgets import vtk as vtk_widgets
from trame.widgets import vuetify3 as vuetify
server = get_server(client_type="vue3")
server.cli.add_argument(
"--remote-url",
dest="remote_url",
help="Remote URL pointing to a VTU file.",
default="https://github.com/Kitware/trame/raw/master/examples/data/disk_out_ref.vtu",
)
(args, _unknown) = server.cli.parse_known_args()
state, ctrl = server.state, server.controller
with tempfile.NamedTemporaryFile() as fp:
try:
print(f"using local file {fp.name}")
urlretrieve(args.remote_url, fp.name)
reader = vtkXMLUnstructuredGridReader()
reader.SetFileName(fp.name)
reader.Update()
except HTTPError as e:
print(RuntimeError(f"Failed to download {args.remote_url}. {e.reason}"))
raise e
dataset = reader.GetOutput()
renderer = vtkRenderer()
renderer.SetBackground(1, 1, 1)
render_window = vtkRenderWindow()
render_window.AddRenderer(renderer)
surface_filter = vtkGeometryFilter()
surface_filter.SetInputConnection(reader.GetOutputPort())
surface_filter.SetPassThroughPointIds(True)
mapper = vtkDataSetMapper()
mapper.SetInputConnection(surface_filter.GetOutputPort())
actor = vtkActor()
actor.GetProperty().SetOpacity(0.5)
actor.SetMapper(mapper)
renderer.AddActor(actor)
renderer.ResetCamera()
state.trame__title = "Fetch Remote URL example"
ctrl.on_server_ready.add(ctrl.view_update)
with SinglePageLayout(server) as layout:
layout.title.set_text("Unstructured grid from remote URL")
with layout.content:
with vuetify.VContainer(fluid=True, classes="fill-height pa-0 ma-0"):
with vuetify.VRow(dense=True, style="height: 100%;"):
with vuetify.VCol(
classes="pa-0",
style="border-right: 1px solid #ccc; position: relative;",
):
view = vtk_widgets.VtkLocalView(
render_window,
)
ctrl.view_update = view.update
if __name__ == "__main__":
server.start()
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