VTK.js + trame: No textures in local rendering => minimal example for python ?

PaulHax · July 23, 2025, 1:59pm

Just for posterity, I think there is a issue with trame-vtk vtkLocalView sync of texture to the client/browser.

This change to vtk.js’s Sources/Rendering/Misc/SynchronizableRenderWindow/ObjectManager/index.js seems to fix it:

The change does have the issue of triggering a perf warning though GL_INVALID_OPERATION: glTexStorage2D: Texture is immutable.

Here is a test trame app that triggers the issue. It updates the texture every second:

gist.github.com

https://gist.github.com/PaulHax/92d81f16c8bb96b1f93b0d0a853ee342

texture_test.py

#!/usr/bin/env python3
"""
Simple trame app to test texture updates on a polygon.
This isolates the texture update issue from the complex footprint code.
"""

import numpy as np
import asyncio
from trame.app import get_server, asynchronous
from trame.widgets import quasar, vtk as vtk_widgets

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