GPU Use with ResliceCursorWidget

Web
1

I am trying to use ResliceCursorWidget with additional components. Currently I display additional actors (spheres) and some polydata, nothing crazy, but it is getting slower. I realized that the GPU is not being used and seems that all calculations are running on GPU. I’m no expert with GPU, is there a way to check if GPU is actually used except than looking at Task Manager? I tried with Chrome and Chrome Canary with and without --enable-unsafe-webgpu.

Also, do I need to download any specific packages to make calculations possible at the gpu (other than import @kitware/vtk.js/Rendering/Profiles/All

Thanks!

2

If you go to WebGL Report, does the unmasked vendor + unmasked renderer indicate you are using your machine’s GPU?

3

There is a POC that implements GPU with ResliceCursorWidget.

Hth,
Julien.

4

I checked WebGl Report and it says that I am using the GPU. I’m sorry I might have been unclear, my main question was more about calculation for the reslicing than rendering

5

Thanks for the reply! I got this to work but the rendering felt weird, it gets blurry during modification (e.g. mouse button down) then clear when done. That’s not a deal breaker but it just didn’t feel as an improvement. I guess the problem is not the rendering on GPU rather making the calculation for the reslicing on the GPU. Is that POC supposed to solve that, or only the redenering?

6

The POC avoids to do a CPU reslicing. Instead it does a simple GPU reslicing. The “weird” feeling is due to the existing default behavior that lower the GPU resolution on “interaction”. I think you can turn it off by looking at the render window interactor.
The POC also shows a great performance when the number of “slabs” is high.
There are however still many rendering oddities that must be tackled to be usable/mergable.