[Bug] MIP Viewport Loses LABELMAP_EDGE_PROJECTION_BLEND Effect After resize

[stada526]

Describe the Bug

With LABELMAP_EDGE_PROJECTION_BLEND, calling the resize function causes an issue where the MIP viewport changes, and it appears that LABELMAP_EDGE_PROJECTION_BLEND is no longer applied.

Steps to Reproduce

I've prepared an example to reproduce this issue.

1. Run yarn run example labelmapMIP
2. In the example, brush a segment.
3. Click the 'Resize' button

2025-02-05.14.31.08.mov

The current behavior

After calling the resize function, it appears that LABELMAP_EDGE_PROJECTION_BLEND is no longer applied.

The expected behavior

LABELMAP_EDGE_PROJECTION_BLEND remains applied.

OS

maxOS 15.1

Node version

v21.7.1

Browser

Chrome 130.0.6723.117

[stada526]

Hi,
I was wondering if there are any updates on this issue.
If no one has enough time to work on it but has an idea of which part may need to be modified to fix the bug, I’d appreciate it if you could share any information. That way, I might be able to help.

[sedghi]

It seems like the issue is related to viewPresentation.

If you comment out this section, it works fine:

  viewports.forEach((viewport, idx) => {
    viewport.setViewPresentation(presentations[idx]);
  });

My guess is that viewPresentation isn't applying the slabThickness. If you check, the PT (not the labelmap) also loses the slabs after resizing.

[minimal-scouser]

i uncommented the part of code you provided. it still breaks?

i checked it with the pr link, stada526 provided.

if you just do this, it breaks

renderingEngine.resize()

more specifically, i found out that resetting camera is what's causing this.
especially this line from RenderingEngine.ts

vp.resetCameraForResize();

i would like to provide more info if you think i'm on the right path.

[minimal-scouser]

providing some context obtained from the office hours:

problem might stem from addVolumesAsIndependentComponents.ts file
specifically this section of file

i forgot what else was discussed on this :)