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I have an arbitrary graph and want to draw an envelope around/behind a certain subset of the graphs nodes. To clarify what I want to achieve, I have made a sketch in Inkscape:

Envelope example

Any ideas how to realize something like that?

Stefan Pinnow
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Morris Shure
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    See: http://tex.stackexchange.com/questions/211282/boundary-around-nodes-corresponding-to-euler-walk, http://tex.stackexchange.com/questions/297222/tikz-how-to-create-rectangle-around-two-nodes-which-are-located-diagonally-to, http://tex.stackexchange.com/questions/70999/highlight-a-group-of-nodes-in-a-tikz-tree. – Alenanno Sep 18 '16 at 18:04

1 Answers1

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Okay, the suggestions of posts related to my question brought me on the right track: Highlight a group of nodes in a tikz tree

One has to exchange expressions of the form \atan2(x, y) with \atan2(y, x) to get it working correctly.

Community
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Morris Shure
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