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r"""
Version for trame 1.x - https://github.com/Kitware/trame/blob/release-v1/examples/ParaView/TimeAnimation/app.py
Delta v1..v2 - https://github.com/Kitware/trame/commit/22329eec355476e5e1a5fb21dfb3b23ee02ae427
Installation requirements:
pip install trame trame-vuetify trame-vtk
"""
import asyncio
import json
import os
import paraview as pv
import paraview.web.venv # Available in PV 5.10-RC2+
from paraview import simple
from trame.app import asynchronous, get_server
from trame.ui.vuetify import SinglePageLayout
from trame.widgets import paraview, vuetify
# -----------------------------------------------------------------------------
# Trame setup
# -----------------------------------------------------------------------------
server = get_server(client_type="vue2")
state, ctrl = server.state, server.controller
# -----------------------------------------------------------------------------
animation_scene = simple.GetAnimationScene()
time_keeper = animation_scene.TimeKeeper
metadata = None
time_values = []
representation = None
def load_data(**kwargs):
global time_values, representation
# CLI
args, _ = server.cli.parse_known_args()
full_path = os.path.abspath(args.data)
base_path = os.path.dirname(full_path)
files = []
reader_props = {}
with open(full_path, "r") as f:
metadata = json.load(f)
reader_props = metadata.get("reader_properties", {})
fields = metadata.get("fields", [])
for name in metadata.get("files", []):
files.append(os.path.join(base_path, name))
reader = simple.OpenDataFile(files)
for key, value in reader_props.items():
reader.GetProperty(key).SetData(value)
reader.UpdatePipeline()
representation = simple.Show(reader, view)
time_values = list(time_keeper.TimestepValues)
update_color_by(0, fields, "remote")
state.time_value = time_values[0]
state.times = len(time_values) - 1
state.fields = fields
simple.ResetCamera()
view.CenterOfRotation = view.CameraFocalPoint
update_view("local")
ctrl.on_server_ready.add(load_data)
# -----------------------------------------------------------------------------
# ParaView pipeline
# -----------------------------------------------------------------------------
# Rendering setup
view = simple.GetRenderView()
view.UseColorPaletteForBackground = 0
view.Background = [0.8, 0.8, 0.8]
view.OrientationAxesVisibility = 0
view = simple.Render()
# -----------------------------------------------------------------------------
# Callbacks
# -----------------------------------------------------------------------------
@state.change("active_array")
def update_color_by(active_array, fields, viewMode="remote", **kwargs):
if len(fields) == 0:
return
array = fields[active_array]
simple.ColorBy(representation, (array.get("location"), array.get("text")))
representation.RescaleTransferFunctionToDataRange(True, False)
name = pv.make_name_valid(array.get("text"))
lut = simple.GetColorTransferFunction(name)
pwf = simple.GetOpacityTransferFunction(name)
_min, _max = array.get("range")
lut.RescaleTransferFunction(_min, _max)
pwf.RescaleTransferFunction(_min, _max)
update_view(viewMode)
@state.change("time")
def update_time(time, viewMode, **kwargs):
if len(time_values) == 0:
return
if time >= len(time_values):
time = 0
state.time = time
time_value = time_values[time]
time_keeper.Time = time_value
state.time_value = time_value
update_view(viewMode)
@state.change("play")
@asynchronous.task
async def update_play(**kwargs):
while state.play:
with state:
state.time += 1
update_time(state.time, state.viewMode)
await asyncio.sleep(0.1)
@state.change("viewMode")
def update_view(viewMode, **kwargs):
ctrl.view_update_image()
if viewMode == "local":
ctrl.view_update_geometry()
# -----------------------------------------------------------------------------
# GUI
# -----------------------------------------------------------------------------
state.trame__title = "ParaView"
with SinglePageLayout(server) as layout:
layout.title.set_text("Time")
layout.icon.click = ctrl.view_reset_camera
with layout.toolbar:
vuetify.VSpacer()
vuetify.VSelect(
v_model=("active_array", 0),
items=("fields", []),
style="max-width: 200px",
hide_details=True,
dense=True,
)
vuetify.VTextField(
v_model=("time_value", 0),
disabled=True,
hide_details=True,
dense=True,
style="max-width: 200px",
classes="mx-2",
)
vuetify.VSlider(
v_model=("time", 0),
min=0,
max=("times", 1),
hide_details=True,
dense=True,
style="max-width: 200px",
)
vuetify.VCheckbox(
v_model=("play", False),
off_icon="mdi-play",
on_icon="mdi-stop",
hide_details=True,
dense=True,
classes="mx-2",
)
with vuetify.VBtn(icon=True, click=ctrl.view_reset_camera):
vuetify.VIcon("mdi-crop-free")
vuetify.VCheckbox(
v_model=("viewMode", "remote"),
true_value="remote",
false_value="local",
off_icon="mdi-rotate-3d",
on_icon="mdi-video-image",
hide_details=True,
dense=True,
classes="mx-2",
)
vuetify.VProgressLinear(
indeterminate=True,
absolute=True,
bottom=True,
active=("trame__busy",),
)
with layout.content:
with vuetify.VContainer(fluid=True, classes="pa-0 fill-height"):
html_view = paraview.VtkRemoteLocalView(view, namespace="view")
ctrl.view_update = html_view.update
ctrl.view_update_geometry = html_view.update_geometry
ctrl.view_update_image = html_view.update_image
ctrl.view_reset_camera = html_view.reset_camera
# -----------------------------------------------------------------------------
# Main
# -----------------------------------------------------------------------------
if __name__ == "__main__":
server.cli.add_argument("--data", help="Path to state file", dest="data")
server.start()
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