#73 Ecliptic disc as well as spherical grid

[klassiek]

I\'d like to request the option of viewing a disc grid representing the ecliptic instead of/as well as the spherical grid.

In addition, it would be useful to indicate the height of an object above or below the ecliptic using a vertical line that intersects the disc.

I\'ve attached a screenshot of a video game that uses a method similar to what I am describing.

[klassiek]

Screenshot of Homeworld 2;s "local ecliptic"