I have recently upgraded to new VTK version 9.4.1 and have issues with the behaviour of my applications.
I am using vtkPlotPoints to draw a plot with certain markerstyle, linestyle etc. The plot receives its data via an algorithm, i.e. QVTKTableModelAdapter is used to generate the table.
When using the plot in a chart it draws as intended. However, if the algorithm changes to columns to be used from the adapter then the plot uses a different style (marker style, line style etc). When the adapter goes back to using the original columns it reverts back to the original style.
Sneaking in a line this->Storage->BufferObjectBuilder.Erase(cacheIdentifier, this->RenderWindow); into vtkOpenGLContextDevice2D::DrawPointSprites just before building the buffer with this->Storage->BufferObjectBuilder.BuildVBO resolves the issue.
From git blame I can see that this section in vtkOpenGLContextDevice2D::DrawPointSprites has changed about a year ago and was edited by @jaswantp
@jaswantp I think this small example highlights the problem.
The plot starts using the #1 column in the table as y axis and gets rendered. Then the pot changes to using the #2 column. The data is correctly displayed, but now as line only; the markers seem to use their buffer. That’s not exactly the same behaviour as I am getting in my application (there the markers are gone), but is probably a good starting point for debugging it.
Note in my application I also see buffered behaviour when the data in the table has changed, but maybe fix this one step at a time.
If you create a branch please let me have access to it, would like to test this out as good as possible.
