[Tutor] Using trigonometry to draw a circle

[Alan Gauld]

On 19/05/2021 01:10, Phil wrote:

> trying to simulate an analogue meter and the current approach is to use 
> the path.AddArc function to draw the meter arc. Now I'd like to add 
> ticks along the arc; I cannot see how to do this.

The normal way to do this is draw a meter in a drawing package,
save it as a png or gif file and display that. Then use the
graphics library to draw the needle at the appropriate angle
on top of the meter. This is common in photo-realistic GUIs
(as often used in lab tools etc), sometimes even taking a
photo of a real meter as a starting point.


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Alan G
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