[vtk-developers] vtkActor2D and layer ordering ?

[Andras Lasso]

Unfortunately, that doesn’t fix the ordering issues for me. I’ll try to create a simple example to demonstrate the problem.

Andras

From: Ken Martin [mailto:ken.martin at kitware.com]
Sent: Thursday, March 17, 2016 9:13 AM
To: Andras Lasso <lasso at queensu.ca>
Cc: Petar Petrov <pip010 at gmail.com>; vtk-developers at vtk.org; vtkusers at vtk.org
Subject: Re: [vtk-developers] vtkActor2D and layer ordering ?

I believe Bill Lorensen has/had a patch related to 2d actor depth in the new OpenGL backend that has been merged into master

https://gitlab.kitware.com/vtk/vtk/merge_requests/1284

does that fix the issue?

Thanks
Ken

On Thu, Mar 17, 2016 at 8:04 AM, Andras Lasso <lasso at queensu.ca<mailto:lasso at queensu.ca>> wrote:
I would be interested in this, too.

When building 3D Slicer with OpenGL backend then everything works well. Switching to OpenGL2 bckend improves performance, fixes transparent polydata rendering, and volume rendering (great!), but there are 2D actor ordering issues all over the place.

How 2D actor ordering is changed in OpenGL2 and what should we change in our applications to have the same behavior as with OpenGL?

Andras

From: vtk-developers [mailto:vtk-developers-bounces at vtk.org<mailto:vtk-developers-bounces at vtk.org>] On Behalf Of Petar Petrov
Sent: March 17, 2016 5:31 AM
To: vtk-developers at vtk.org<mailto:vtk-developers at vtk.org>; vtkusers at vtk.org<mailto:vtkusers at vtk.org>
Subject: [vtk-developers] vtkActor2D and layer ordering ?


I found at least 3 ways that might influence z-order of 2D actors:

1) vtkActor2D->SetLayerNumber(int)
2) vtkImageMapper->SetZSlice()
3) vtkProperty2D->SetDsiplayToBackground/Foreground()

None of which seems to do the job. also previous similar question:
http://public.kitware.com/pipermail/vtkusers/2010-February/057204.html

Before vtk7.0, at least point 3 was working, now in vtk7.0 it also stopped working.

So my question is how can I influence z-ordering of 2Dactors as per latest vtk?

Cheers,
Petar






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