Refactoring
Moved elements to separate file
Added rotation matrix function
Rotation matrix calculation for plotter ship projection
Plotter now able to change reference bodies and render various targets
You probably need this file too.
Was missing the sun.
Fixes #12. Issue was caused by Unity left hand cartesian coordinate system. Implemented conversion.
Removed celestials.txt because it changes dynamically.
Caching planetary orbits for plotter. Fixes #14. Added cute solar system animation for main menu as part of issue #15.