We have a TAstroCoords class that has as fields HA and DEC, and abstract methods asMean and asRaw

Then we have a TAstroCoordsRaw, which A) returns itself for asRaw and B) returns a transformed mean coordinate-- a TAstroCoordsMean--- for asMean

Then we have a TAstroCoordsMean, which A) returns a transformed TAstroCoordsRaw for asRaw, and B) returns itself for asMean.


TAstroCoords ac = Telescope.GetPosition; /* THis is whatever type the telescope felt like giving back-- raw, mean, etc.  IDK */

/* if we need mean HA, it's this easy.  This converts if necessary, and doesn't if not */

DoSomething(ac.asMean.HA);

TAstroCoords mean = ac.asMean;  /* This is really a TAstroCoordsMean-- a conversion has happened if necessary */

TAstroCoords newMean = mean.asMean; /* This is really a TAstroCoordsMean and identical to mean */

TAstroCoords raw = ac.asRaw;   /* This is a TAstroCoordsRaw */