[QGIS-Developer] Circular Lines in QGIS

[C Hamilton]

I had a user request Circular Lines in the Shape Tools plugin and they gave
the following example.

https://www.stayaspensnowmass.com/sites/default/files/aspenFlightMap.jpg

I don't know how one would do this type of drawing. Does anyone have any
ideas? It draws the lines trying to avoid overlapping other lines in a very
pleasing manner. Doing this is probably outside the scope of the Shape
Tools plugin, but I just wanted to ask to see if there is a relatively easy
algorithmic way of drawing these types of lines between two points.

Thanks,

Calvin
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