The Code Project post Orbital Mechanics Introduction, Part 2 by charles922 uses some code from my WPF 3D posts. His program lets you experiment with the following orbital parameters:

- Eccentricity – the eccentricity of the orbit’s ellipse.
- Inclination – the vertical tilt of the ellipse with respect to the orbital plane measured at the ascending node (where the orbit passes upward through the orbital plane).
- Semi-major Axis – the semi-major axis of the orbit’s ellipse.
- Longitude of the Ascending Node (Omega, ?) – horizontally orients the ascending node of the ellipse.
- Argument or Periapsis – defines the orientation of the ellipse in the orbital plane, as an angle measured from the ascending node to the periapsis.

To see Charles’ post, click here.

For LOTS more information on three-dimensional graphics in WPF, see my book WPF 3d,

Three-Dimensional Graphics with WPF and C#.

## About RodStephens

Rod Stephens is a software consultant and author who has written more than 30 books and 250 magazine articles covering C#, Visual Basic, Visual Basic for Applications, Delphi, and Java.