thanks to @TfGuy44 and @kfrajer
i now use push rotate(-a) pop
and also understand the rotate little bit better,
sadly my poor knowledge about astronomy seems to be my problem, not the processing part.
( a elliptic orbit ( not the planets position on the orbit ) around the SUN
should be defined by the elliptic parameters “semi-major-axis” and “eccentricity”
and a 3 angle info about the orientation of the ellipsis ( i could use to do rotate X Y Z the ellipsis prior to find the planet position on that orbit )
but the WIKI planets info and the default picture there does not help me much, after rotateZ( Longitude of ascending node) and rotateY( Inclination) for all planets
a ( final ) rotateX (Argument of perihelion)
looks just wrong)
