Contour filter "Compute scalars" misbehaves
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
After loading a data file with more than one data set in it (for example, the VTK file stored in http://www.cs.unc.edu/~taylorr/temp/Mcneil_CNTs.zip), application of the contour filter does not allow me to click the "Compute Scalars" checkbox (it is grayed out). If I compute a range of values (Delete All/New Range) and Contour by "Result1", it does not carry Result1 into the output. Therefore, I cannot color the contours by the value I used to generate them.
Workaround shows another problem: If I use the Calculator on the original data set and make a Result1copy data set from Result1 and then Contour the output of the calculator by Result1, then it carries through Result1 and Result2 but not Result1copy. I would have expected it to keep Result2 and Result1copy. If I contour by Result1copy, it still carries through Result1 and Result2.
I'll add the workaround into my homework description for the class this semester, but it would be good if the checkbox was not grayed out so we could select the behavior that we usually want from this filter. It used to work in an older version.