Icosahedron threePoint [UNLISTED]

Trying to do a multipolar reinterpolation of each face - we need to nicely project a triangle onto a triangle

AT THIS POINT IT'S STILL WORSE THAN GNOMONIC :)

Doing some bibliographic research it appears that you can try instead with

Fuller (made in protovis but non-free licence)
gnomonic (ok but ugly)
chamberlin (but it has wedges)
snyder1992 is (almost?) equalarea
conformal / lee

but maybe there is a better idea… it's frustrating cause doesn't seem that complicated!

forked from espinielli's block: Icosahedron [UNLISTED]

forked from Fil's block: Icosahedron Chamberlin [UNLISTED]

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