Create inverse function for terncoords

[alchemyst]

Terncoords converts ternary fractions to rectangular coordinates, but we need to be able to go back from those coordinates to the fractions.

[sha17hab]

Hello Carl, sorry I am a little bit lost in your latest comment. Did you mean that we should produce an anti-Terncoords function to get the rectangular coordinate and turn them into three fractional value where their sum should be equal to a unit?

[alchemyst]

That's exactly what I mean. terncoords takes the fractional values and gives x, y coordinates that can be plotted. There isn't a quick way right now to take the x, y coordinates back to the fractions.

[sha17hab]

Sure, but is it practical since one should have the original fractional variables to be able to use Terncoords converts. What would be the use of this?

[alchemyst]

For instance to enable ginput to be used, or to find the fractions for particular contours.

This message may contain unintentional errors, as it was typed on a phone

On 30 Jun 2016, at 18:01, Shahab Afshari notifications@github.com wrote:

Sure, but is it practical since one should have the original fractional variables to be able to use Terncoords converts. What would be the use of this?

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