VisIT CarpetHDF5 plugin pseudocolor error

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Issue #1663 open
Bruno Giacomazzo created an issue

This problem has been present since the CarpetHDF5 plugin for VisIt became part of the standard VisIt distribution and it is still present in the current version of VisIt (2.8).

When Pseudocolor is used in log scale and Centering is set to Original or Nodal, not all the values of the plotted quantity are shown (in particular lower values are not plotted at all). This does not happen if one sets Centering to Zonal, which instead shows the correct values.

I have attached a couple of images showing the problem (they show hydrobase::rho for a BNS run).

I do not know what may be causing it, but it may cause serious errors when analyzing data with VisIt (since one may miss some of the information on the low value regions).

Keyword: visit

Comments (4)

  1. Bruno Giacomazzo reporter
    • removed comment

    please note that visit_nodal.png (contained in the tgz file) actually shows the effect of pseudocolor when one sets Centering to Zonal (sorry for the mistake in the name of the file).

  2. Bruno Giacomazzo reporter
    • removed comment

    Thanks a lot for the suggestion.

    I confirm that turning off the 'Apply color using textures' flag in Top-menu->Options->Rendering->Advanced solves the problem in my case (see https://elist.ornl.gov/pipermail/visit-users/2015-January/016895.html)

    Maybe this should be explicitly mentioned somewhere. In the cactus web page there used to be a page with info about visualization (http://cactuscode.org/documentation/visualization/VisIt/), but it seems to be outdated. Maybe it could go in the ET wiki?

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