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Feature Request: Arc Canvas Type

See original GitHub issue

It would be nice if Ginga had a canvas type for drawing Arcs. Some background; I use ginga to make a finding chart tool for the HiPERCAM instrument - hfinder

screenshot 2018-10-23 at 16 49 59

We need to add an element to represent the patrol field of a pickoff arm (see the yellow area below). If there was an Arc type, I could implement the patrol field in a similar way to the Annulus object. I’ve tried adding this myself, but got stuck, and thought it might be a generally useful addition to Ginga.

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Issue Analytics

State:
Created 5 years ago
Comments:16 (11 by maintainers)

Top GitHub Comments

1reaction

StuartLittlefaircommented, Oct 25, 2018

As requested… The yellow area shows the patrol field for the pickoff arm, and the green “Darth Vader helmet” shows the region left unvignetted by the guide probe. A set of mirrors can pick off any star along the yellow arc and re-image on the CCD to use as a comparison! Need to work on the colour scheme…

screenshot 2018-10-25 at 13 19 03

0reactions

StuartLittlefaircommented, Nov 1, 2018

@ejeschke thanks - percentage compass works brilliantly!

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