From fbf8a9c4e69134ea53a583faebe3aec91e9abc4f Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Wed, 6 Feb 2019 22:05:33 +0100
Subject: Document visualization of grid refinement hierarchies

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 apps/adrian/HowToVisualize.txt | 6 ++++++
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+How to visualize refined grids in four easy steps using ParaView:
+
+1. Open all generated *.pvd files (there is one for each grid)
+2. Select and group them using "Group datasets"
+3. Filter the merged data set using a material number threshold
+4. The "Threshold" node contains the merged, non-overlapping and non-uniform grid
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