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How to draw circles with RVIZ markers?

asked 2019-06-18 10:28:17 -0500

Mobile_robot gravatar image

updated 2019-06-18 13:00:14 -0500

Hello all,

I would like to indicate a special zone around an object (for instance a cube) in RVIZ by a marker. I have looked at the basic_marker tutorial and it is possible to creat this zone by a LINE_STRIP. But I was wondering if we can create a one like the Interactive Markers. I have looked the documents and I did not find that the circle around the object like the one on ChessPiece is configurable.

Do you have any idea how to do it correctly?


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Assuming you just want the circle to look the same as the one used by the interactive markers then you can reproduce it using a triangle list marker and setting the alpha transparency of the whole marker to around 50%.

PeteBlackerThe3rd gravatar image PeteBlackerThe3rd  ( 2019-06-18 10:37:41 -0500 )edit

There are marker types for CUBE, SPHERE and CYLINDER. Would those be sufficient for what you're trying to do?

A circle can be made from a really flat cylinder.

or does it need to be an 'open' circle (ie: not a filled one)?

gvdhoorn gravatar image gvdhoorn  ( 2019-06-18 10:43:57 -0500 )edit

thanks for your comment @gvdhoorn, I found exactly the CYLINDER shape marker as the easiest solution.

Mobile_robot gravatar image Mobile_robot  ( 2019-06-19 01:55:42 -0500 )edit

@PeteBlackerThe3rd thanks for your comment.

Mobile_robot gravatar image Mobile_robot  ( 2019-06-19 01:56:37 -0500 )edit

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answered 2019-06-19 01:54:39 -0500

Mobile_robot gravatar image

As I understood, based on your application and your requirement there exist different solutions. For my case as @gvdhoorn mentioned it can be solved by a CYLINDER shape marker.

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Asked: 2019-06-18 10:28:17 -0500

Seen: 1,675 times

Last updated: Jun 19 '19