Water Flow cannot switch to cc_label plot

[Martinusz]

Hello!

I have recently started using VisIt and tried to do the tutorials, but I have encountered an issue with the Water Flow tutorial. In the "Number of Water Droplets Over Time" section, I cannot seem to switch my active plot variable to cc_label to do the query and the "Treshold operator." Is there a way to change the active plot variable from y_coord to cc_label? Every time I try, an error message pops up saying "VisIt was unable to change the active variable because: The expression was invalid: The expression parser encountered an unexpected token: connected_components(alpha1 > 0.5)." That last part was me trying to define cc_label, and maybe I did it wrong.

[JustinPrivitera]

I think the connected components function is named conn_components, not connected_components. Try making that change and see if that fixes it.

[Martinusz]

https://visitusers.org/index.php?title=Water_Flow_Tutorial
It did not really mention anything about switching active plot variables, that's why I'm confused

[JustinPrivitera]

I am confused as well. We do not maintain visitusers.org which is why this is not easy to answer. I am reaching out to others who may be able to help. If we had the expression definition for cc_label I think we would be in a good place.

[JustinPrivitera]

Here are the expressions: https://github.com/visit-dav/visit/blob/ab193565c13e66c87eb374dadab4a42dc679b0dd/src/doc/tutorials/tutorial_examples/dbreak3d/dbreak_fluid_exprs.xml

[JustinPrivitera]

So cc_label should be conn_components(mesh). Then you'll add the DeferExpression Operator and have it use cc_label. Make sure this is the order of operators:

Then change the active variable of the plot to cc_label.

Let me know if you need anything else!